JPH01193831A - Information retrieving device - Google Patents

Abstract

PURPOSE:To shorten a retrieving time by providing a mark retrieving means for detecting a mark put corresponding to an image frame and performing retrieval and a frame retrieving means for detecting the end part of the image frame and performing retrieval and switching both retrieving means. CONSTITUTION:A mark detector 17 possesses a photoelectric converting element and outputs a mark detection signal by disconnecting a light beam from a lamp 14 with the mark (m) when a film F is fed. And the mark detection signals are counted by the counter of the retrieving device. An image detector 23 arranged on the back surface of a screen 18, for example, detects the end part of the image frame 24 from the difference of light receiving quantities between a base film part and the image frame 24. And the optional retrieving means can be selected by switching to either mark retrieving means or frame retrieving means with the aid of a switching means. Thus, an operation for retrieval is facilitated and the retrieving time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information retrieval device that is incorporated into a microfilm reader or the like and searches for a desired image frame in a roll-shaped microfilm information recording medium.

(Prior Art) Conventionally, a search device built into a microfilm reader, etc. uses a film with a search mark attached to the side of each frame of the film, and optically detects this mark.
There is a mark search means that searches for a desired frame in a film by counting the number of frames.

In addition, for example, the light receiving element can be moved in the search direction of the microfilm (
There is a frame search means that is arranged in parallel in the feed direction), irradiates light from the back side of the film, and detects and searches the edge of the image frame based on the difference in the amount of light received between the base film part and the image frame part. .

In conventional search devices, the mark search means and frame search means are each provided as separate devices.

(Problem to be Solved by the Invention) However, in such conventional technology, when searching only by mark search, the relative position between the mark position and the image frame is not necessarily constant due to the microfilm, so it is difficult to find a predetermined position on the screen. It is not possible to match the image to the position and stop, and in order to match the image, fine adjustment by manual feeding is required, and the mark detector must be moved. Therefore, there is a problem that the search operation becomes troublesome and the search time is long, and there is also a problem that the structure becomes complicated when the mark detector is moved.

On the other hand, when searching for frames, it takes time to recognize that each piece of image information on the film is an image, so it takes time to search for the desired image from a large amount of image information. There was a problem.

Furthermore, depending on the microfilm, there may be a mixture of films with search marks and films without search marks, so a single search device cannot handle the problem.
There was a problem in that it was extremely inconvenient for the user.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to provide an information retrieval device that has a simple configuration, shortens search time, and improves versatility. Our goal is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an information retrieval device that searches for a desired image frame in an information recording medium. a mark search means for detecting the marked mark with a detector to perform a search; and a frame search means for detecting the end of the image frame and performing a search; both of the search means can be switched and rotated by a switching means. Configured.

(Function) In the present invention having the above configuration, by switching to either the mark search means or the frame search means using the switching means, it is possible to select any search means from both search means.

(Example) The present invention will be explained below based on the illustrated example. Fourth
The figure shows a film feeding section of a film reader printer with a search device to which the present invention is applied. is a capstan roller for feeding out the microfilm F in the cartridge 1, Ml is a motor for driving the capstan roller 2, M2 is a film rewinding motor for rotating the film spool in the cartridge, and SQL 1 is a motor for rewinding the film for rotating the film spool in the cartridge. The microfilm F is attached to the capstan roller 2 via the support arm 3.
4 is the support arm 3e plunger 3
a* A spring that moves the gear abstan roller 2 to separate the capstan roller 2 from the microfilm, 5OL2 is a brake solenoid for the film rewinding motor M2, and when this brake solenoid 5OL2 does not operate, the motor M2 can rotate. And brake solenoid 5
When the OL2 is activated (turned on), it attracts the brake plate 5 fixed to the motor shaft to prevent rotation of the motor.

6.7 is a film guide roller, and the guide roller 7 is driven by the feeding operation of the microfilm F. 8 is a take-up reel, M3 is a film winding motor for rotating the take-up reel 8, and 5QL3 is a brake solenoid for the motor M3.

Although not shown, a guide plate is provided for guiding the film along the film feeding path between the cartridge 1 and the take-up reel 8.

14 is a lamp for illuminating the microfilm F; 15 is a condenser lens; 16 is a projection lens for enlarging and projecting the image of the film F illuminated by the lamp 14 onto a screen 19 (shown in the first figure); and 17 is each of the microfilms F. This is a known mark detector that detects counting marks m provided on the sides of the image frame 18.

The mark detector 17 has a photoelectric conversion element, and when the film F is transferred, the light beam from the lamp 14 is interrupted by the mark m, thereby emitting a mark detection signal, and this mark detection signal is received by the counter of the search device. It is counted. Since the details of the search device are publicly known, their explanation will be omitted.

FIG. 1 is a schematic front view of FIG. 4, and the same members as in FIG. 4 will be described with the same reference numerals. The screen 18 enlarges and projects the image on the microfilm F. 13 is a shutter, 20 is a mirror box composed of scan mirrors 21, 22, etc., which moves in the direction of arrow A when printing an image, and exposes the image light from the projection lens 16 onto a photoreceptor drum (not shown). Then, while scanning in the direction of arrow B, an electrostatic latent image is formed on the photoreceptor drum. An image is formed from this electrostatic latent image on a transfer material through a known image forming process. An image detector 23 is arranged on the back side of the screen 18 and detects the edge of the image. Here, the image detector 23 is not necessarily placed on the back side of the screen 18, but may be placed at any position on the optical path. However,
If it is placed in the optical path that forms the printer, its shadow will be projected onto the transfer material (print paper), causing the problem that the image will be missing.

FIG. 2(a) shows the positional relationship between the image frame 24 of the microfilm F, the mark m, the mark detector 17, and the image detector 23, where the image detector 23 receives light from the base film section and the image frame 24. The edge of the image frame 24 is detected from the difference in amount. Further, FIG. 2(b) shows a microfilm F' for frame search, and no marks are attached to the sides of the image core 24.

FIG. 3 is a block diagram showing the control system of this embodiment, in which 31 is a CPU as a control means, 32 is an R
OM, 33 is a RAM that stores the input desired frame number.
, 34 is a display that displays the contents written in the RAM 33, 35 is an interface circuit, 36 is a motor control circuit for feeding and stopping the film based on control signals from the CPU 31, and 37 is a mark search as an input means. This keyboard consists of numeric keys 0, 1.2 to 9, a search key, a rewind key, a print key, a preset key, etc., and is used when searching for the mark m on the microfilm F with the mark detector 17. . in this way,
Searching for desired image information using mark m is referred to as mark search (F, S).
(abbreviated as )].

Further, in FIG. 3, reference numeral 39 is a frame search keyboard, and as shown in FIG. A forward key 42 and a changeover switch 43 as a changeover means for switching between mark search and frame search are provided. 38 is CPU31°R
This is a data bus for transmitting and receiving data between the OM 32, the RAM 33, the display 34, and the interface circuit 35. A print control circuit 45 controls the printer section 46.

By the way, as shown in Fig. 5, frame search (F,
When the selector switch 43 on the keyboard 39 for C) is switched to the frame search (F, C) side, mark search (F
-S) side, and when the forward key 42 is turned on, the microfilm F advances in the forward direction (rightward in FIG. 1), and after the forward key 42 is turned off, the image detector 23 detects the end of the image frame 24 and stops as shown in FIG. 2(a). When the forward key 42 is turned on and off repeatedly, the microfilm F is stopped frame by frame.

Therefore, the microfilm F without the mark m
', the image detector 23 can detect the image frames 24 and stop each frame. Note that the bar 2 forward key 41 is the same except that the direction of movement is opposite to that of the forward key 42. In this way, it is possible to feed the microfilm F', which does not have the mark m, frame by frame.
Trol...F,C).

Next, the search operation of this embodiment will be explained. Under frame control (F, C), when the forward key 42 or the backward key 41 is pressed, the image frame 24 is detected by the image detector 23 and stopped. Since the image of the image frame 24 is enlarged and projected by the projection lens 16 to, for example, 24 times, the image detector 23 placed on the back side of the screen 18 detects the 1 times mark placed directly above the microfilm F. Since it is possible to detect an image more accurately than the camera 17 by the magnification of the lens, the accuracy with which the film F is stopped is improved.

Therefore, when searching for a mark, the stop position shifts and the mode selector switch 43 is moved to the frame control (F, C) side, and the forward key 42 or backward key 41 is pressed.
If you correct the stop position using , return to mark search again, and print (copy), you will get a copy with the print frame aligned.

That is, the search and print operations of this embodiment will be explained based on the flowchart shown in FIG.
) side or mark search (F, S) side, and select F, S.
If it is, determine whether to execute the search in step
If the search is to be executed, it is executed in step ■. Step ■
If the search is not executed, the process proceeds to step (3) and it is determined whether to print. When printing, it is determined whether position adjustment is necessary in step 2. If it is not necessary, printing is executed in step 2. If it is necessary, in step 2, switch switch 7 43 is set to F, Switch to the C side and move on to the flowchart for the F and C sides.

Then, in step ■, the forward key 42
If it is on, the film is advanced in step (2), and the forward key 42 is turned on in step (2) until the image detector 23 detects the end of the image frame. On the other hand, if the forward key 42 is not turned on in step ■, it is determined whether or not the backward key 41 is turned on in step @, and if it is turned on, the image detector 23 detects the image in step @~[stock]. The backward key 41 is turned on until the end of the frame is detected. After that, it is determined in step ■ whether or not to print, and if it is to be printed, it is executed in step 0, and if it is not to be printed, it is determined in step 0 whether the position adjustment is completed,
When finished, turn the selector switch to F or S in step ①. In this way, the search and print operations are completed.

In the above embodiments, the case where a roll-shaped microfilm was used as the information recording medium was described, but the present invention is also applicable to a fish-shaped microfilm.

Further, the image detector is not limited to the above embodiments, and may be configured, for example, from a light-emitting section for detecting image edges arranged above and below the microfilm and a light-receiving section paired with the light-emitting section. If a line sensor is used, the false detection rate can be reduced.

Further, in the above embodiment, an example was explained in which the image frame is a simplex image frame, but the present invention can also be applied to a duplex image frame. In this case, a plurality of image detectors may be arranged in the width direction of the film.

(Effects of the Invention) The information retrieval device according to the present invention has the above-described configuration and operation, and has both a mark search means and a frame search means, and has a switching rotation, so fine adjustment by manual feed is not required. Therefore, the search operation is easy and the search time can be shortened.

Furthermore, since there is no need to move the mark detector, the structure is simplified. Furthermore, since even information recording media without marks can be handled by one device, versatility can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an example in which an embodiment of the information retrieval device according to the present invention is applied to a microfilm reader, FIGS. 2(a) and 2(b) are front views of a microfilm, and FIG.
The figure is a block diagram showing the control system of the same embodiment, and FIG.
FIG. 5 is an explanatory diagram of the frame control keyboard in the same embodiment, and FIG. 6 is a flowchart showing the operation of the control system in the same embodiment. Explanation of symbols 17...Mark detector 23...Image detector 24
... Image frame 37 ... Keyboard for mark search 39 ... Keyboard for frame search 41 ... Backward key 42 ... Forward key 43 ... Changeover switch (switching means) 1 piece" \ ]・1 Figure 3

Claims (1)

[Claims] An information retrieval device for retrieving a desired image frame in an information recording medium includes a mark retrieval means for performing a retrieval by detecting a mark attached to the image frame with a detector, and an end portion of the image frame. 1. An information retrieval device comprising: a frame retrieval means for detecting and searching, and configured to be switchable between the two retrieval means by a switching means.