JPS61138945A - Inspection device for color film - Google Patents

Abstract

PURPOSE:To make possible stable inspection by providing a color monitor and memory for the image corresponding to a processed image signal and a color monitor for the image stored in a frame memory, storing the image data of an inspection standard into the frame memory and displaying and comparing the contents of both memories on the respective monitors. CONSTITUTION:The reference original picture image for inspection is picked up with a TV camera 3 and the processed image signal VS' is obtd. with an analog to digital converter 4 and an image processing circuit 5 and is stored into the frame memory 10 and is displayed via a digital to analog converter 11 on a color monitor 12. The color original picture 1 to be inspected is thereafter picked up with the camera 3 and the processed image signal VS' is obtd. with the converter 4 and the circuit 5. The signal is converted to analog quantity by a digital to analog converter 6 and is displayed on the color monitor 7. The image of the reference original picture displayed on the monitor 12 and the image of the original picture 1 displayed on the monitor 7 are compared and the picture 1 is inspected. The circuit systems for the reference original picture and the picture 1 are the same in this case and the comparison is made with the exact screen images without being affected by the mechanical difference, drift with time, etc. The exact inspection operation is thus made possible.

Description

[Detailed Description of the Invention] (Technical Field of the Invention) This invention provides a color film test for evaluating color originals prior to photographic printing. More specifically, in order to evaluate the film and determine printing conditions, the color and density of the film is converted into a video signal, and the color original image is evaluated by displaying it on a color monitor before photo printing is performed. This invention relates to a color film testing device.

(Technical Background of the Invention and Problems Thereof) Conventionally, as such a color film voltage detection device, one disclosed in JP-A-58-12243, for example, is known, and this device detects color and density. A color image that has been automatically corrected so that Therefore, you only need to correct those with inappropriate density and color balance, and those that do not need to be printed, such as out of focus, and only those that are difficult to correct automatically (color feria, J1! light, different light sources, etc.) Since a monitor person only needs to operate the manual operation input section to correct the color and density of a color image, it is possible to achieve excellent quality even without a highly experienced and capable monitor person or a highly accurate color film automatic analysis device. The correction information determined by this monitor or the correction information automatically calculated is recorded on a recording medium such as a paper tape or magnetic tape recorder, and is then printed on a photo print. At this time, the color film is loaded into an automatic printer, and printing is performed by controlling the printing exposure amount based on the correction information read from the recording medium.

However, with such a verification device, the color image displayed on the color monitor is corrected to achieve the density and color balance that the monitor operator considers most desirable, and this correction is strictly at the monitor operator's discretion. It depends on experience and ability. Therefore, it was inevitable that the density and color balance of the printed photographs would differ depending on the monitor.

As a verification device that eliminates these drawbacks.

For example, there is a device disclosed in Japanese Patent Application Laid-Open No. 57-207218, in which a plurality of representative scenes are stored as model images in an analog video disk, video tape recorder, or the like.

A desired model image is selected from among a plurality of scenes stored at the time of the test and displayed on a color monitor in a divided manner. However, such a method has a drawback that when the model image is recorded using an analog system, the difference in recording and reproducing conditions due to changes over time or the like directly deteriorates the accuracy.

On the other hand, when storing as a digital signal, the stored image signal is a signal before passing through an image processing device, so an image converting section is required for the monitor screen and the screen from the storage/reproducing device. is complicated and expensive, and
A drawback is that it is not easy to accurately align the levels of the two systems of image signals. 1 (Object of the invention) This invention was made under the above circumstances,
It is an object of the present invention to provide a color film testing device capable of always performing stable testing at a low cost.

(Summary of the invention) This invention is a color film test! Regarding equipment,
A UA imaging device that captures a color original image, a ^0 converter that converts the image signal captured by this imaging device into digital 9, an image processing circuit that processes the digital image signal from this ^D converter, and a first color monitor that displays an image corresponding to the processed image signal from the image processing circuit; a frame memory that stores the processed image signal;
A second color monitor is provided to display the image stored in the frame memory, image data serving as a reference for the test is stored in the frame memory, and the screen images of the first and im2' color monitors are compared to It is designed to test color original drawings.

(Embodiment of the Invention) FIG. 1 is a block diagram showing an embodiment of the present invention, in which a color original image l such as a negative film is irradiated by a light source 2, and an image of the color original image l is captured by a TV camera as an ms device. 3, and the three primary color RGB video signal vS from the TV camera 3 is converted into digital t by the D converter 4.
is converted into the video signal VS mouth, and then the image processing circuit 5
The processed image signal V from the image processing circuit 5 is inputted to the image processing circuit 5, is subjected to necessary processing such as color correction and gradation conversion, and is outputted as a processed image signal vS.
S' is converted into an analog value by the flA converter 6 and sent to the CRT.
The image is inputted to a color monitor 7 such as the like, and the image of the color original l is displayed. Also, the processed image signal vS
is inputted and stored in the frame memo January 0, and the stored image signal of one screen is inputted to the color monitor 12 via the mouth A* converter 11 and displayed.

The color monitors 7 and 12 are arranged adjacent to each other so that a monitor man can observe both color monitors 7 and 12 at the same time.

In such a configuration, first, a color original image to be used as a standard for verification is attached to a predetermined position of the verification device, this reference original image is imaged by the TV right camera, and processed through the ^0 converter 4 and the image processing circuit 5. An image signal VS' is obtained, and this processed image signal vS' is stored in a frame memory 10 and displayed on a color monitor 12 via an OA converter 11. Therefore.

The color monitor 12 will display an original color image that will serve as a reference for the verification. After that, attach the color original image l to be verified to the predetermined position of the verification device, and
V Take an image with the right camera, A.

Both processed transmitted signals v are passed through the converter 4 and the image processing circuit 5
Obtain S°. Then, this processed image signal vS
is converted into an analog quantity by a zero-converter 6 and displayed on another color monitor 7. Therefore, the image of the color original image l to be verified is displayed on the color monitor 7, and the monitor person can check the display image of the reference original image displayed on the color monitor 12 and the color image displayed on another color monitor 7. You can directly compare and observe the displayed image of the original picture,
This allows the color original image l to be verified.

In this case, since the circuit system of the reference original image and the color original image to be verified are the same, the color film verification device a
Comparisons can be made using accurate screen images without being affected by differences or drift over time, and since the image information is stored in digital quantities in the frame memory 1G, there are no differences between the storage and playback conditions. Therefore, accurate verification work can be performed at all times. Furthermore, the task of storing image data in the frame memory 10 is easy;
Another advantage is that a reference original image of an appropriate pattern can be imaged and stored as needed.

Note that in the above embodiment, the display device for the reference original image and the display device for the color original image to be verified are separate;
As shown in the figure, the screen is divided on one color monitor 20, and for example, an image to be verified as a color original is displayed in the left half area 21, and an image of the reference original image to be used as a reference is displayed in the right half area 22. In the configuration shown in FIG. 2, the signals R° to B′ from the image processing circuit 5 and the frame memory ! The signal R'A-B''^ from 0 is switched to vJ by the switching circuit 11 by the switching signal SW in the middle of each horizontal scanning period, that is, at position g120^ on the screen, and is converted to one output/A converter. Since two images 21 and 22 are displayed separately on one color monitor 20 and one color monitor 20,
It has the advantage of being cheaper in terms of cost. vJ exchange circuit 11 is 3
It has switching contacts 11R-11B corresponding to the colors, and can be switched simultaneously and in conjunction with the switching signal.

(Effect of the invention) As mentioned above, the color film test of this invention! According to the device, the circuit system displayed on the color monitor can be the same for the reference original image as a reference and the color original image to be verified, and the reference image information is stored in the frame memory in digital quantities. , it is possible to always perform accurate verification work without being affected by machine differences or drift over time of the verification device. Furthermore, in terms of circuit configuration, only one system of image processing circuit 5 is required, and there is an advantage that an inexpensive system can be constructed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the invention, and FIG. 2 is a block diagram partially showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Color original picture, 2... Light source, 3... TV camera, 4... AO converter, 5... Image processing circuit, li
, 11...OA converter, ? , 12.20... Color monitor, lO... Frame memory. - L Continuation of the amendment February 1980 78 2. Name of the invention Color film verification device 3. Relationship with the person making the amendment Patent applicant Fuji Photo Film Co., Ltd. 21Q (520) Nakanuma, Minamiashigara City, Kanagawa Prefecture 4. Agent 8, Contents of amendment (1) In the specification, page 8, line 2, "transmission signal VS'J" is amended to read "image signal VS'J." (2) Same, page 9, line 17. Correct the line "Costa" to "Cost". (3) In the same page, page 9, line 18, the phrase "in the switching circuit 11" is corrected to "in the switching circuit 11."

Claims (2)

[Claims] (1) An imaging device that captures a color original image, an AD converter that converts the image signal captured by this imaging device into a digital quantity, an image processing circuit that processes the digital image signal from this AD converter, and a first color monitor that displays an image corresponding to a processed image signal from an image processing circuit; a frame memory that stores the processed image signal; and a second color monitor that displays an image stored in the frame memory. , wherein image data serving as a reference for verification is stored in the frame memory, and screen images of the first and second color monitors are compared to verify the color original image. Film testing device. (2) The color film testing device according to claim 1, wherein the processed image signal and the image signal from the frame memory are displayed on one color monitor in a divided screen.