JPH0897978A - Image reader - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent waste of image reading time by eliminating the need to distinguish between negative film and positive film each time the transparent original changes. [Structure] A plurality of negative films or positive films are stored in the same storage device 38, and one reading unit 12
Frames are sent frame by frame, and an image is automatically read through the CCD 3 line sensor 7 every time the transparent original F (133) changes. By determining whether the storage device 38 is removed from the reading unit 12 (S3), the negative film and the positive film are detected in units of the storage device (S3).
4) According to the detection, negative or positive processing is executed (S5).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device,
More specifically, for example, it relates to an image reading device such as a slide projector that reads an image by irradiating a transparent original such as a film held in a slide mount with light.

[0002]

2. Description of the Related Art Conventionally, as this type of image reading apparatus,
For example, a slide projector having an automatic frame-by-frame function of automatically sequentially feeding films one by one to an illumination unit is widely known. This device includes a tray for storing a transparent original film held on a slide mount, an illuminating unit provided under the tray, a CCD line sensor for reading an image of the film sent to the illuminating unit, and the like. And a reading means provided.

One of a plurality of storage units provided on the tray
Films stored one by one are sequentially sent to the illumination unit one by one when the operator presses the drive button, and the film is irradiated with light by a light source such as a halogen lamp provided in the illumination unit. It is projected on the reading means,
An image is read by a CCD line sensor or the like that constitutes the reading means. At this time, press the drive button 1
Each time it is pressed, the tray is driven for one frame, and one film in the storage unit corresponding to this frame is sent to the illumination unit. However, if the drive button is pressed for a long time, the film is automatically fed by the automatic frame advance function. Are sequentially sent to the illumination unit one by one, and images can be continuously read.

This type of apparatus automatically distinguishes between a negative film and a positive film when the film is stored in the reading unit, and distinguishes between the negative film and the positive film each time the film is changed. ing.

[0005]

However, the above-mentioned image reading apparatus of the prior art has an automatic discrimination function for negative film and positive film, which is automatically prescanned every time the film is replaced. The
As we distinguish between negative film and positive film,
Even when trying to read the negative film continuously, there is a problem that it takes time because the negative film and the positive film are discriminated each time the originals are replaced. The same thing can be considered for a positive film.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to:
An object of the present invention is to provide an image reading apparatus that prevents the waste of time as described above by eliminating the need to distinguish between a negative film and a positive film each time a transparent document changes.

[0007]

In order to achieve the above object, the present invention comprises an illuminating section having a light source for projecting a light image of the transparent original toward the reading means, and the transparent original is provided in the illuminating section. An image reading apparatus that automatically reads an image each time a transparent original is sent to change the transparent original is provided with a discriminating means for automatically discriminating between a negative and a positive of the transparent original in a unit of a storage device for storing a plurality of transparent originals. It is characterized by

Further, in the present invention, it is preferable that the discriminating means automatically discriminates the negative or the positive of the transparent original according to the result of the determination that the storage device is removed from the reading unit for frame feeding. Can be characterized.

Further, in the present invention, preferably, the storage device has a negative or positive identification mark, and the determination means processes a sensor for reading the identification mark and output information of the sensor to obtain a negative. , And a detecting means for automatically detecting positive.

In the present invention, preferably, only when the result of the automatic discrimination of the negative or positive by the discriminating means is different from the previous negative or positive discrimination result, the negative or positive image corresponding to the discrimination result of this time. It can be characterized in that it has a control means for executing the processing for.

[0011]

In the present invention, a plurality of negative films or positive films are stored in the same storage device, and the negative film and the positive film are discriminated in units of the storage devices. For this reason, it is possible to shorten the image reading time as compared with the conventional example in which the negative film and the positive film are discriminated each time the transparent original is changed.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the schematic arrangement of an image reading apparatus according to an embodiment of the present invention. In FIG. 1, the image reading apparatus 1 includes an illuminating unit 3 having a halogen lamp 2 as a light source for irradiating a transparent original with light, and a reading unit 6 for reading the film F in the reading unit 12. As C
A reading unit 8 to which a CD3 line sensor 7 is attached is provided.

In the lighting unit 3, a DC (direct current) power source 1
The light emitted from the halogen lamp 2 connected to 7 illuminates the reading unit 12 via the condenser lens 18, the field lens 19 and the optical filter 20. A storage device 38 capable of storing a plurality of negative films or positive films is inserted in the reading unit 12, and the plurality of films are put in the reading position 15 by moving the storage device 38 up and down. be able to. At this time, the film F located at the reading position 15 is irradiated with light, and the transmitted light is reflected by the reflecting mirror 22 through the imaging lens 21 and irradiates the CCD 3 line sensor 7.
An image is read by the D3 line sensor 7.

The CCD 3 line sensor 7 is provided with red, green and blue on-chip optical films 3
The line sensor is composed of a line sensor, and each line sensor performs main scanning, and the reading unit 8 is driven by the stepping motor 23 in a direction perpendicular to the main scanning direction (d in the figure).
Sub-scanning is performed by moving along the rail 24 in the direction).

The information read by the CCD 3 line sensor 7 is output as an analog signal to the analog processing circuit 26 via the cable 25, where it is subjected to DC reproduction, amplification, A / D (analog digital) conversion, and further digital processing. After being digitally processed by the circuit 27, it is sent to an external device 29 via an interface circuit (I / F) 28.

Also, a stepping motor drive circuit 30 for driving the stepping motor 23, an interface circuit 28, a digital processing circuit 27, a film detection circuit 31 for processing information from the sensor 16, and an autochanger drive circuit (not shown) are provided. It is connected to the controller 32. The film detection circuit 31 detects whether the film frame has changed, whether the storage device 38 has been removed from the reading section 12, and whether the storage device 38 is a negative film storage device or a positive film storage device.

Further, the controller 32 controls the CCD
The control for synchronizing the sub-scanning by the 3-line sensor 7 with the external device 29 and the setting control of the digital processing circuit 27 are performed. This controller 32 is
A light amount control for controlling the voltage of the DC power source 17 so that the illumination light amount of the halogen lamp 2 is changed according to the presence or absence of the film F in the reading unit 12 or the reading operation of the reading unit 6 to which the C power source 17 is connected. The controller 32 also serves as a means.

FIG. 2 is a detailed view of a portion of the optical filter 20 shown in FIG. The optical filter is an ND filter 134.
And a cyan filter 135, which are moved by the filter drive circuit 137 to move the transparent original 133 (film F
In and out of the lighting unit 3.

FIG. 3 is a detailed view of the reading unit 12 and the storage device 38 shown in FIG. By moving the storage device 38 up and down, the film F can be loaded into the reading unit 12. The storage device 38 is provided with an ID code mark (for example, cutout or the like) for discriminating between negative and positive and is read by the sensor 16.

FIG. 4 is a flow chart showing the control operation of the controller 32 according to the first embodiment of the present invention. It is assumed that a certain film is read first (step S
1). Then, the change of the film frame is detected through the film detection circuit 31 (step S2). At that time, it is detected whether or not the next film to be read is the same storage device 38 (step S3). Same storage device 3
If it is 8, the prescan is automatically performed as it is. If they are different storage devices, it is determined whether the film is a negative film or a positive film (step S4), and then the processing for the negative film or the positive film is performed (step S4). S
5) Automatically perform prescan.

FIG. 5 is a flow chart showing the control operation of the second embodiment of the present invention. It is assumed that a certain film is read first (step S11). Then, it is detected that the frame of the film has changed (step S12).
At that time, it is detected whether the film to be read next is in the same storage device (step S13). If they are the same storage device, they are automatically prescanned.

If the storage devices are different,
It is determined whether the storage device is a negative film storage device or a positive film storage device (step S1).
4) After that, when the previous storage device and the current storage device are of the same type (step S15), the prescan is automatically performed as it is. If the storage devices are different types, the negative film or the positive film is processed (step S16), and the prescan is automatically performed.

[0024]

As described above, according to the present invention,
When reading a plurality of continuous negative films or positive films continuously, a plurality of negative films or positive films are stored in the same storage device without distinguishing between the negative films and the positive films every time the films are replaced. Since the negative film and the positive film are discriminated for each storage device, the time required to read an image can be shortened.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an image reading apparatus according to an embodiment of the present invention.

2 is a detailed view of a portion of an optical filter 20 of FIG.

FIG. 3 is a detailed view of the reading unit 12 and the storage device 38 of FIG.

FIG. 4 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image reading device 2 Halogen lamp 3 Illuminating section 5 Auto changer 6 Reading means 7 CCD3 line sensor 8 Reading unit 12 Reading section 16 Sensor 17 DC power source 20 Optical filter 32 Controller 33 Position sensor 34 Stepping motor 38 Storage device 133 Transparent original 134 ND filter 135 Cyan filter 137 Filter drive circuit F filter

Claims (4)

[Claims] 1. An illuminating unit having a light source for projecting a light image of a transparent original toward a reading unit, and an image is automatically read every time the transparent original is changed by feeding the transparent original to the illuminating unit. In the image reading apparatus for performing the above, the image reading apparatus is provided with a discriminating unit for automatically discriminating between a negative and a positive of the transparent original in a unit of a storage device for storing a plurality of transparent originals. 2. The determination means executes automatic determination of negative or positive of the transparent original in accordance with a result of determination that the storage device has been removed from a reading unit for frame feeding. 1. The image reading device described in 1. 3. The storage device has an identification mark for negative / positive determination, and the determination means performs a sensor for reading the identification mark and an output information of the sensor to automatically detect the negative / positive. The image reading apparatus according to claim 1, further comprising a detecting unit. 4. A control for executing a negative or positive process corresponding to the present discrimination result only when the result of the automatic discrimination of the negative and positive by the discriminating means is different from the previous negative or positive discrimination result. The image reading apparatus according to claim 1, further comprising a means.