JPH0637983A - Picture processor - Google Patents

Abstract

PURPOSE:To quickly feed back a moving member in any place back to the original position. CONSTITUTION:Based on signals from a PI61A for HP and PI61B for EG, the moving member is judged to be in any of areas 1,2, and 3. If it is in the area 1, a light shielding plate 48 is moved in the scanning direction until it is no longer detected by the PI61A for HP, then moved backward at a constant speed and stopped after moved for a prescribed distance after the plate 48 is detected. If it is in the area 2 or 3, the moving member is accelerated backward by a prescribed pulse number and stopped by the prescribed pulse number after the light shielding plate 48 is detected. In the case of the area 2, when the light shielding plate 48 is detected during the accerelation, it is moved at the constant speed at the time of detection and stopped by the pulse number used at the time of accerelation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus for reading image information from a microfilm or the like, and conversely outputting image information, and in particular, operation control of a moving member scanned when inputting / outputting the information. It is about.

[0002]

2. Description of the Related Art In this type of image processing apparatus, in order to reproduce image information recorded on a microfilm or the like on recording paper or record it on an optical disk or the like, the image information is read using a line sensor having a CCD element. There is a system of converting this image information into electronic information and then sending this signal to a printer or an optical disk. This method has an advantage that image information read by a plurality of image processing devices can be printed by one printer in common.

When image information is read using such an image processing apparatus, the line sensor or the original is moved by a motor in the sub-scanning direction, and this movement is controlled as shown in FIG. ing.

The diagram shown in this figure shows the control of reciprocating the moving member to which the line sensor is attached by a stepping motor within a predetermined section.
In the figure, L indicates the intra-section distance, L1 indicates the acceleration section, L2 indicates the constant speed section, and L3 indicates the deceleration section. In the acceleration section of L1, the stepping motor is accelerated. This acceleration is realized by linearly increasing the number of pulses per unit time given to the stepping motor. When performing this acceleration control, if the distance and the arrival speed of the acceleration section L1 are determined, at what interval should the pulse number N uniquely determined by the distance of this acceleration section be given to the stepping motor? Can be easily calculated, but the method of giving this pulse is generally stored in a RAM or the like as a storage device. In the constant speed section of L2, the stepping motor may be rotated at a constant speed, so that a constant number of pulses is given per unit time. In the deceleration section of L3, contrary to the case of acceleration, it is realized by linearly decreasing the number of pulses per unit time given to the stepping motor.

[0005]

However, in the type in which the moving member is stopped based on the signal from the position sensor or the like, when the above control is applied, for example, in the middle of the sub-scanning section. If this control is applied when the moving member stopped at is returned to the original position, it may not be possible to stop the moving member at the desired position.

That is, depending on where the initial position of the moving member is, the passing speed of the position sensor may be different (when passing the position sensor before the constant speed processing is performed). Since the stop positions of the members are also varied, it becomes very difficult to reliably stop the moving member at the original position.

In order to avoid the above problems, before accelerating the moving member toward the position sensor, the moving member is once moved in the opposite direction to secure a distance required for acceleration. Although there is a configuration in which the above control is applied, this causes another problem that it takes a long time to end the movement.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image processing apparatus in which the moving member can be quickly returned to its original position regardless of the position.

[0009]

In order to achieve the above object, the present invention provides a stepping motor which gives a driving force for reciprocating a moving member, and a driving pulse which gives a driving pulse to the stepping motor. It has a control means for controlling and a detection means which is arranged at a predetermined position in the movement path of the moving member and which detects whether or not the moving member has passed the predetermined position. When it is detected that the member has passed the predetermined position, deceleration processing is performed with a predetermined number of pulses N to stop the moving member. In the image processing apparatus, the detection means detects the passage from the start of the movement of the moving member. And a storage unit for storing the number of pulses counted by the counting unit, After moving member said detecting means passes, characterized in that stopping the moving member by performing the storage means deceleration in accordance with the number of pulses stored in the processing.

[0010]

The counting means counts the number of drive pulses used from the start of movement of the moving member to the detection of passage by the detecting means. The number of counting pulses counted by the counting means is stored in the storage means. Therefore,
The storage means stores the number of drive pulses given to the stepping motor after the moving member starts moving until the detection means detects the passage of the moving member. When the stepping motor deceleration processing is performed, the deceleration processing is performed based on the number of drive pulses stored in the storage means.

Therefore, the acceleration / deceleration control can be effectively used to move the moving member to a predetermined position.
The moving member can be moved smoothly and in a short time.

[0012]

The present invention will be described in detail below based on the illustrated embodiments of the present invention. FIG. 1 is a perspective view showing a carrier unit used in the image processing apparatus of the present invention. A roll film carrier 12 (hereinafter referred to as a carrier portion) is loaded with a microfilm F, and the microfilm F is wound around a supply reel 20. The supply reel 20 is a film (not shown). -A cartridge (hereinafter referred to as a cartridge) is detachably supported and rotatable. The microfilm F unwound from the supply reel 20 in the cartridge is wound around the winding reel 22 provided in the carrier unit 12.

The supply reel 20 drives the film F by a drive shaft 23 driven by a supply reel drive motor MR.
It is possible to rotate in the forward and reverse directions in the unwinding direction and the winding direction. The take-up reel 22 is driven by a drive shaft 24 connected to a take-up reel driving motor MF.
It is designed to rotate.

Further, in the carrier portion 12, a delivery roller 25 driven by a motor (not shown) for transporting the leading end portion of the microfilm F fed from the cartridge toward the take-up reel 22, It has a guide roller 26 for guiding the film sent out from the micro film F, an encoder 30 for counting the conveying distance of the microfilm F in both forward and backward directions, and an auxiliary roller 28 in pressure contact with the encoder 30. . In addition, guide rollers 27 and 29 located at the same level are provided in the carrier portion 12.

The light from the light source such as the lamp 35 is condensed by the condenser lens group 37b via the condenser lens group 37a and the reflection mirror 36, and then the microfilm F located between the upper and lower pressure bonding glasses 38, 39. Is irradiated. The lower pressure-bonding glass 39 is vertically movable so as to be pressure-bonded to the upper pressure-bonding glass 38 via the microfilm F when an image is projected. The light transmitted through the microfilm F is projected by the projection lens 4
It is enlarged by 0 and projected on the CCD element of the line sensor. As shown in FIG. 1, in order to adjust the magnification of the projection lens 40, a projection lens drive motor 44 for driving the projection lens 40 is connected to the projection lens 40.

When retrieving the image projected on the CCD element, the film F is wound and rewound between the reels 20 and 22, and the desired image is placed at the retrieval position of the pressure-sensitive glass 38, 39. It is done by stopping.

The line sensor is attached to the lower surface side of the moving member 45, which is reciprocally movable in the sub-scanning direction, in the figure. The moving member 45 can reciprocate along the guide 49. This movement is performed by the stepping motor Mp, and the driving force required for this movement is transmitted by the wire 47 wound around the pulleys 46. Therefore, the stepping motor M
As p rotates, the moving member 45 moves in the sub-scanning direction indicated by the arrow in the figure, and the projected image information is read.

Further, a light shielding plate 48 is provided on the side surface of the moving member 45.
Is attached, and the initial position detection sensor 61A and the end position detection sensor 61 provided in the moving path
The light shielding plate 48 is detected by B. Here, the photo interrupter 61A for initial position detection
Is for detecting the initial position of the moving member 45, and the end position detecting photo interrupter 61B is for detecting the ending position of the moving member 45.

In the present embodiment, the scanning method as described above has been illustrated, but the scanning method is not limited to such a method, and a method of transporting and scanning the film itself or a mirror scanning method may be used. With these methods,
What is scanned is a film and a mirror.

When the analog image information read by the line sensor is A / D converted to obtain digital image information, particularly when each image frame of the roll type film as described above is searched and read, each image frame is read. In addition, it is necessary to set the exposure to an appropriate one according to the density of the film and to perform a correction process. Therefore, before the main scan for reading the actual image information, a preliminary scan (preprocessing) for checking the recording state of the image frame to be read is performed. When the preliminary scan operation is performed on the forward path of the sub-scan movement, for example, the main scan is performed on the return path of the sub-scan movement.

Therefore, the basic operation for reading an image is as follows. The moving member 45 to be moved in the sub-scanning is once returned to the photo interrupter 61A for initial position detection (hereinafter referred to as HP PI), acceleration control is performed from here, and the movement is determined in consideration of the system speed, the electronic scaling factor, and the like. It is moved at a constant speed in the scanning direction. Then, the photo interrupter 61B for detecting the end position
The deceleration is started from the time point (hereinafter referred to as the EG PI), and is stopped after the output of a predetermined number of pulses. After this, the moving member 4
Reference numeral 5 moves at high speed in the returning direction by acceleration control, and after reaching the initial position (hereinafter referred to as HP), decelerates with a predetermined pulse and stops.

As a process to be performed in the preliminary scan, considering the point of automating the reading of the film, the AE process for determining the optimal lamp light amount for each image frame, and whether each image frame is a negative film Negative / positive determination processing to determine if it is a positive film, frame size determination processing to determine the image size (frame size) of each recorded image frame, and scanning start to determine the start position of the film reading area There is position recognition processing. The sample data obtained by the preliminary scan is stored in the RAM, and the frame size determination processing and the reading start position recognition processing described above are performed based on these sample data, and an image reading area to be read in the main scan and The reading start position is accurately grasped. Further, image processing such as exposure correction and γ correction suitable for an image frame to be read is also performed, and then main scanning is performed to obtain actual digital image information.

FIG. 2 is a block diagram showing a digital processing circuit for converting analog image information obtained by the line sensor into digital image information. CC of line sensor
A clock generation circuit 51 for sending a clock signal to the CCD element 50 is connected to the D element 50, and an analog signal which is an output voltage from the CCD element 50 is sent to the A / D conversion circuit 52. There is. The digital signal converted by the A / D conversion circuit 52 is output to the shading RAM connected to the microcomputer CPU 53.
In addition to being sent to the storage medium 54, the output voltage from the CCD element 50 is sent to a shading correction circuit 55 that electrically corrects the output voltage to a uniform level. The signal from the shading correction circuit 55 is sent to an image processing circuit 56 that executes various image processings to be subjected to image processing, and then sent to an external output device such as a printer or an optical disk via an external I / F circuit 57. It is designed to be used.

The CPU 53 has a shading RA.
In addition to M54, system ROM58 and system RAM5
9, the storage medium such as the AE-RAM 60 is the system bus 6
1 is connected. A control signal for controlling the operation of each circuit is sent from the CPU 53 to the shading correction circuit 55, the image processing circuit 56 and the external I / F circuit 57 via the system bus 61.

The line sensor 3 for scanning the image
A pulse motor M for reciprocating 4 in the sub-scanning direction.
P is an image scan drive circuit 6 that controls the operation of this.
2 is connected. An initial position detecting photo interrupter 61A and an end position detecting photo interrupter 61B are also connected to the image scan drive circuit 62. A prism rotation drive circuit 64 that controls the operation of the motor 63 that rotates and drives the image rotation prism is connected, and a lamp light amount control circuit 65 that controls the light amount of the prism 35 is connected to the lamp 35. ing. Further, although not shown, a projection lens drive circuit is connected to the projection lens drive motor 44, and a roll film carrier control circuit is connected to the reel drive motors MR and MF of the carrier unit 12. Each of these circuits 62, 64, 65 has
A control signal for controlling the operation of each circuit is sent from the CPU 63 via the system bus 61.

The operation of the image processing apparatus according to the present invention will be described below with reference to the flowchart. FIG. 3 is a flow chart showing a process at the time of starting the device of the present invention.
When the power of the device is turned on or the reset button is pressed, the hardware of the device itself is initialized, and at the same time, peripheral devices such as a printer connected to this device are initialized (S1 to S3). At the time of performing this initialization, it is necessary to return the moving member 45 to which the line sensor is attached to the HP (home position), and this processing is performed by the initial position moving processing of S4. When the initial position moving process is completed, a process of waiting for various commands such as a print command and a microfilm search process is executed (S4, S5).

FIG. 4 shows S in the flowchart of FIG.
4 is a flowchart of a subroutine relating to movement of the initial position of FIG.

In this flowchart, a process for determining in which section the moving member 45 is located is performed. The reason why such a process is necessary is that the device cannot determine where the moving member 45 is located when the device is powered on or when the reset button is pressed. To determine the correct position,
The signals output from the two photo interrupters are used. Therefore, the position of the moving member 45 is 1 as shown below.
It is possible to make judgments about the areas 3 to 3. In addition,
The operating range of the moving member 45 is mechanically restricted so that the moving member 45 is not located outside the above area.

Position detecting photo interrupter (HP PI) 61 input through the image scan driving circuit 62
When the output of A is LO, the light shielding plate 48 is P for HP.
Since the I61A is shielded from light, the moving member 45 exists in the area 1 as shown in FIG. Therefore, in this case, the control for area 1 is performed (S11, S12). On the other hand, when the output of the HP PI 61A is HI and the output of the terminal position detecting photointerrupter (EG PI) 61B is LO, the positional relationship between the light shielding plate 48 and the EG PI 61B is shown in FIG. As shown, the moving member 45 is present in the area 3. In this case, the control for area 3 is performed (S13, S1).
4). Further, when both the outputs of the HP PI 61A and the EG PI 61B are HI, the light shielding plate 48 is not present at a position that blocks any photo interrupter, so that the moving member 45 is shown in FIG. As shown, it exists in the area 2. Therefore, in this case, control for area 2 is performed (S15).

When such processing is performed, the existing region of the moving member 45 is recognized, but the moving member 4
When it is determined that the number 5 exists in the area 1, the operation of the moving member 45 is controlled as in the flowchart shown in FIG. 7.

As a premise of performing the initial position moving process, it is assumed that the light shielding plate 48 is cut off from the HP PI 61A in the returning direction and then moved for a predetermined number of pulses N and then stopped. Moreover, the same pulse number as the above shall be used for the number of pulses used for acceleration and deceleration. If it is known that the moving distance is short, the acceleration / deceleration processing is not performed and only the constant speed processing is performed. The initial position movement processing is performed under such a premise, but the acceleration / deceleration processing and the constant speed processing of the moving member 45 are performed as follows. The start pulse speed f0 capable of driving the stepping motor, the desired operation pulse speed fNN, and the number N of pulses used for acceleration / deceleration are set respectively to calculate N pulse interval data, and this is used as a data table in the system memory. Store it inside. The concept of the storage state of this data is as shown in FIG. That is, the memory stores data such that the pulse generation interval becomes shorter in the ascending address order, and pulses are generated at time intervals according to this data. Therefore, if the data is read in the ascending order of the address, the pulse interval will be gradually shortened and the stepping motor will be accelerated. Conversely, if the data is read in the descending order of the address, the interval will be gradually increased and it will be decelerated. Will be. In the case of only low speed processing without acceleration / deceleration, a pulse interval of 1 / f0 may be given.

When the moving member 45 exists in the area 1, it is located near the HP, so the direction in which the moving member 45 should be driven is set to the scanning direction. Specifically, the rotation direction of the stepping motor Mp is set (S21). When the rotation direction is determined, pulses are supplied to the motor Mp until the output of the HP PI 61A becomes Hi (S22, S23). When the output of the PI 61A for HP becomes Hi, the supply of the pulse is stopped and the motor M
p is temporarily stopped (S24). Next, the rotation direction of the motor Mp is set to the return direction (S25). And this time, until the output of the HP PI 61A becomes Lo, the motor M
A pulse is supplied to p (S26, S27), and this output is L
The CPU 53 counts the number of pulses given to the motor Mp by the counter provided therein from the time when it becomes o, and when the value of this counter becomes N, the supply of the pulses is stopped and the motor Mp is stopped. (S28-S3
0). The above-described processing is performed because even if the light shielding plate 48 has already shielded the HP PI 61A at the time of power-on / reset, the position is not always the HP position, and the moving member 45 is not moved. This is because the moving member 45 is accurately returned to the HP position by performing an operation of once moving in the scanning direction and then returning to the return direction from the time when the HP 61A has passed. In this case, the pulse is applied by the constant speed processing without performing the acceleration / deceleration processing because the movement distance can be very short. Further, when the moving member 45 is present in the region 3, the distance to the HP is sufficiently long, so the acceleration process (S30), the constant speed process (S40), and the deceleration process (S50) are performed in order. , The moving member 45 is returned to the HP position. These subroutine flowcharts are as shown in FIGS. 9 to 11, and the operation of these flowcharts will be described in detail below.

First, when returning the moving member 45 to the HP position, the pulse interval data stored as shown in FIG. 6 is read. In this case, since the acceleration is performed, the pulse interval data at the address A0 is read first (S31). Next, the image scan drive circuit 62 outputs pulses to the motor Mp at time intervals corresponding to the pulse interval data (S32). When the output of this pulse ends, the count of the acceleration counter for reading the pulse interval data is incremented to read the pulse interval data of that address (in this case, the pulse interval data of address A1 is read). Will be). The above process is repeated until the counter becomes N (S33, S34).
When processed as described above, the pulse interval becomes gradually shorter, so the rotation speed of the motor Mp gradually increases,
The moving member 45 will be accelerated. It should be noted that this acceleration process is performed using a preset N pulse.

After the acceleration process is performed, the constant speed process is performed. This process is performed as follows based on the flowchart shown in FIG. First,
At the same time when this process is executed, the CPU 53 reads the pulse interval data (S41). The image scan drive circuit 62 outputs a pulse at a time interval corresponding to the pulse interval data to move the moving member 45 in the returning direction at a constant speed (S42). This process is performed until the output from the HP PI 61A becomes Lo (S43). While the moving member 45 moves at a constant speed during this period, the pulse interval data read during this period is exactly the same data, and the data is predetermined as described above.

The deceleration process shown in the flowchart of FIG. 11 is started from the moment when the output of the HP PI 61A changes to Lo. Also in this case, the pulse interval data is read in the same manner as above, and the pulse is output according to this data. First, the pulse interval data stored as shown in FIG. 6 is read. In this case, since the deceleration is being performed, the pulse interval data at the address AN is read first (S51). Next, the image scan drive circuit 62 outputs pulses to the motor Mp at time intervals corresponding to the pulse interval data (S52). When the output of this pulse is completed, the count of the deceleration counter for reading the pulse interval data is incremented to read the pulse interval data of that address (in this case, the pulse interval data of address AN-1). The above process is repeated until the counter reaches N (S5).
3, S54). When the processing is performed as described above, the pulse interval gradually increases, so that the rotation speed of the motor Mp gradually decreases and the moving member 45 is decelerated. Note that this deceleration process is similar to the acceleration process and is set to a preset N
It is performed using pulses.

By performing the above processing, the moving member 45 can be returned to the HP position in a short time.

Finally, the processing when the moving member 45 exists at the position of the area 2 will be described. Since this area is much wider than the other two areas, proper processing is required to return the HP position to the HP position in a short time. That is, the CPU 53 determines that the moving member 45 is the HP PI 6
This is because it cannot be determined at all whether the position is close to 1A or the position close to the EG PI 61B. Therefore, if an attempt is made to return the moving member 45 to the HP position by uniform acceleration / deceleration processing, a problem may occur.
For example, when the moving member 45 is located in the vicinity of the HP PI 61A, the HP PI 61A is shut off during the acceleration process when the return is performed, and the moving member 45 is disconnected by a predetermined pulse. It can be difficult to slow down by a number. In order to eliminate such a problem, the motor is returned at a predetermined speed that can be stopped at any time, or is moved once in the scanning direction by the number of pulses required for acceleration, and then the acceleration processing in the returning direction is performed. It is possible to perform such processing. However, such processing requires time or requires extra operations. Therefore, in the present embodiment, the following processing is performed to prevent such a problem. This process will be described with reference to the flowcharts of FIGS. 12 and 13 and the graph of FIG.

First, the CPU 53 reads out the pulse interval data from the smallest address as in the above description, and outputs the pulses at the pulse intervals according to the data. When the output of this pulse is completed, the acceleration counter is incremented and the pulse interval data of the next address is read (S61 to S63). The above processing is performed for HP P
The process is repeated until the output of I61A becomes Lo or the value of the counter becomes N. In other words, during the acceleration, the light shield plate 48 blocks the HP PI 61A or the motor Mp is accelerated until N pulses are given (S64, S6).
5).

During the acceleration, the output of the PI 61A for HP is Lo
If it is determined that the deceleration counter nD
Is set to n (S66), and the difference (N-n) from N set as the number of pulses for acceleration / deceleration in advance is calculated (S67).
The value of the counter nD is, as shown in FIG. 14, the HP PI 61A after the movement of the moving member 45 is started.
Is the number of pulses given to the output of Lo until it becomes Lo, and the number of pulses N is the number of pulses required until the moving member 45 is set to the HP position after the output of the HP PI 61A becomes Lo. . Therefore, the number of pulses (N−n) is the number of pulses required to move the moving member 45 at a constant speed.
When this calculation is completed, the value of the constant speed counter becomes (N-
Pulses are output at a constant interval until n), and the moving member 45 is moved at a constant speed. At this time, the pulse interval data having the address nD is used (S68 to S70).
On the other hand, when the acceleration process is performed until the counter value becomes N, the deceleration counter nD is set to N (S71), and the output of the HP PI 61A becomes Lo at regular intervals. A pulse is output to move the moving member 45 at a constant speed (S72, S73).

The deceleration processing is performed after the constant speed processing is performed. In this deceleration processing, first, the pulse interval data is read from the same address as the value of the deceleration counter nD, and the deceleration processing is performed. Pulses are output at time intervals according to the data (S74, S75). When the output of the pulse is completed, the value of the deceleration counter is counted up and the above processing is repeated until the value of the counter becomes nD (S76, S77). When the above process is completed, the pulse output is stopped and the motor Mp is stopped.

This processing is summarized as follows. When the moving member 45 exists in the area 2, the acceleration is started in the returning direction for the time being. H during this acceleration
When the PI 61A for P is reached, the final speed at the time of arrival is maintained and the vehicle is moved at a constant speed, and when the planned number of pulses is exhausted and acceleration is completed, the speed is set at the set speed. It is moved at high speed, and then decelerated using the same number of pulses as the number of pulses required for acceleration.

As described above, in the present invention, since the moving member 45 is returned to the HP position by the acceleration / deceleration control according to the distance to the HP PI 61A position, the moving member 45 is moved to the HP position. Will be restored very quickly. Furthermore, after passing through the HP PI 61A, it moves for a predetermined distance and then stops,
The reliability of stopping accuracy is very high.

Although the image processing apparatus has been described as an example in the above embodiments, the present invention can be applied to an output apparatus such as a line printer.

[0044]

As described above, since the image processing apparatus of the present invention can use the acceleration / deceleration processing even when the moving member is returned to the original position, the time required for the return can be shortened. Since it is possible to start the deceleration process from a point that is a predetermined distance from the original position,
The stop position accuracy can be made very high.

[Brief description of drawings]

FIG. 1 is a perspective view showing a carrier unit used in an image processing apparatus of the present invention.

FIG. 2 is a block diagram of a control system of the apparatus shown in FIG.

3 is a flowchart showing initialization processing of the control system shown in FIG.

FIG. 4 is a flowchart showing steps of S4 of FIG.

FIG. 5 is a diagram for explaining the area recognition processing of FIG.

FIG. 6 is a conceptual diagram showing a storage state of data used during acceleration / deceleration processing.

FIG. 7 is a control flowchart when the moving member exists in the area 1.

FIG. 8 is a control flowchart when a moving member exists in a region 3.

FIG. 9 is an acceleration control flowchart when the moving member exists in the area 3.

FIG. 10 is a flow chart of constant speed control when a moving member exists in a region 3.

FIG. 11 is a deceleration control flowchart when a moving member exists in a region 3.

FIG. 12 is a control flowchart when a moving member exists in a region 2.

FIG. 13 is a control flowchart when a moving member exists in a region 2.

FIG. 14 is a diagram for explaining the speed control situation of the present invention.

FIG. 15 is a diagram for explaining a conventional speed control situation.

[Explanation of symbols]

45 ... Moving member, 53 ... CPU (control means, counting means), 59 ... System RAM (storage means) 61A ... Photo interrupter for initial position detection (detection means) 61B ... Photo interrupter for detection of end position (detection means) 62 ... Image scan drive circuit Mp ... Stepping motor

Claims (1)

[Claims] 1. A stepping motor which gives a driving force for reciprocating a moving member, a control means which gives a driving pulse to the stepping motor to control the driving of the stepping motor, and a stepping motor in a moving path of the moving member. And a detection unit arranged at a predetermined position for detecting whether or not the moving member has passed the predetermined position, and a predetermined pulse when the detection unit detects that the moving member has passed the predetermined position. In an image processing device that performs a deceleration process with a number N and stops the moving member, a counting unit that counts the number of drive pulses used from the start of the movement of the moving member until the passage is detected by the detecting unit, Storage means for storing the number of pulses counted by the counting means, and after the moving member has passed through the detection means, the storage means stores the number of pulses. The image processing apparatus characterized by stopping the movement member by performing a deceleration processing in accordance with the number of pulses.