JPS6211371A - Detecting and processing method for picture information - Google Patents

Abstract

PURPOSE:To simplify correction mechanism by detecting the amount of shift between the image sensor coordinate and the actual picture coordinate and generating a table in which the start addresses for each size and respective vertical/horizontal carryings, and by correcting the position of the sensor based on the said addresses. CONSTITUTION:The light transmitting through a negative film2 that is transferred by transferring mechanism 9 of the system is detected by an optical sensor 8, A filter 3 is adjusted in accordance with image signals of three primary colors, and a photographic printing paper 7 is exposed with the exposure amount of a black shutter 6. The two-dimensional image sensor consisting of CCDs is positioned in the vicinity of the film 2. The entire film 2 is separated into arrays of picture elements, and the picture information is detected. The drive circuit of the sensor 11 supplies drive signals 101-103, to detect the amount of shift between the image sensor coordinate and the actual picture coordinate. And the table in which the start address for each size and respective vertical/horizontal carryings, is generated to correct the position of the sensor by the said start addresses.

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention provides a method for accurately and automatically detecting and processing image information of an original film such as a negative film without adjusting the position of an image sensor. The present invention relates to a method for detecting and processing image information.

(Technical background of the invention and its problems) In a photoprinting device, it is necessary to measure the density of the original film (for example, negative film) in order to determine the printing exposure amount or correction amount. An optical sensor such as a photodiode placed nearby measures the average density of the negative film as LAT [I (Large
Area Trans-mittance Densi
Image detection using LATD measures the average value of the negative film, and does not measure the image density of the negative film accurately over the entire screen. The drawback was that exposure or correction was not accurate.

The applicant has proposed the device shown in FIG.
-7534, Special No. 111 [59-33723),
That is, FIG. 1 shows an example in which the photographic image information detection apparatus 10 is applied as is to a conventional photographic printing apparatus, and the negative film 2 on the negative carrier l sent to the printing section by the conveying mechanism 9 is It is designed to be illuminated by a light source 4 through three complementary color filters 3 each of 2 yellow (Y), magenta (M) and cyan (C), and a negative film 2
The transmitted light passes through the lens unit 5 and the black shutter 6 and reaches the photographic paper 7. The photographic paper 7 is wound on a supply reel 7A, and is wound on a take-up reel 7B in synchronization with the conveyance and stop of the negative film 2, so that the photographic paper 7 is wound on the lens unit 5 side of the negative film 2. Nearby are red (R) J & (G) and blue C.
A photosensor 8 such as a photodiode for detecting image density information of the three primary colors (B) is provided, and the photographic printing is performed based on the detection signal of the sensor 8. An image information detection device W110 is provided near the negative film 2 so as to be inclined to the optical axis LS of the light source 4 and the negative film 2. A lens unit 12 is provided to form an image approximately at the center, and a substrate 13 is attached to the back surface of the unitized detection device to which a processing circuit made of an IC or the like for image processing is mounted.

Here, as shown in FIG. 2, the two-dimensional image sensor 11 includes an imaging section 101 that optically captures an image, a holding section 102 that stores charges transferred from the imaging section 101, and a holding section 102 that stores charges transferred from the imaging section 101. It is composed of an output register 103 for outputting the charge held in the holding unit 102, and a q for controlling drive signals 101S-1033 from the drive circuit.
Two-dimensional (area) image information is photoelectrically converted and an analog image signal PS is serially output from the output register 103. 1. The circuit configuration mounted on the i& board 13 is, for example, as shown in FIG.
Driven by drive signals 10LS to 103S from
The light irradiated onto the imaging unit 101 of the image sensor 11 is outputted as an image signal PS from the output register 103, sampled and held in the sample hold circuit 21 at a predetermined sampling period, and the sampled value is sent to the A/D converter. 22, it is converted into a digital signal DS.

The digital signal DS from the A/D converter 22 is input to the logarithmic conversion circuit 23, where it is logarithmically converted, converted into the density signal DH, and then written into the memory 25 via the write control circuit 24. The integrated control circuit 24 is connected to the drive circuit 20
A reading speed signal R9 is inputted to drive the image sensor 11 to read image information at a constant speed, and density signals ON are sequentially written to predetermined positions in the memory 25 according to the driving speed of the image sensor 11. It looks like this.

In such a configuration, when printing a normal photograph, the optical sensor 8 detects the transmitted light of the negative film 2, which is transported by the transport mechanism 9 and is stationary at the printing section, and detects the three primary colors RGB. The filter 3 is adjusted according to each image signal, and the black shutter 6 is opened to expose the photographic paper 7 with the determined exposure amount.

and. A surface scanning two-dimensional image sensor 11 made of COD, for example, is arranged near the negative film 2.
Image information is detected by dividing the entire screen of the negative film 2 into a large number of aligned pixels.

That is, by applying predetermined drive signals 101S to 103S from the drive circuit 20 to the image sensor 11, two
Since the dimensional image sensor 11 receives the transmitted light of the negative film 2 placed in the printing section via the lens unit H2, the two-dimensional image sensor 11 detects the entire negative film 2 as shown in FIG. 4(A). It is possible to divide the image into a large number of aligned small pixels 2A and sequentially scan the entire screen of the negative film 2 according to the scanning line SL. and,
After the entire screen has been scanned, the image signal PS is sequentially output from the output register 103 of the image sensor 11, and the image signal PS is processed and then stored in the memory 25 as shown in FIG. 4(B) under the control of the write control circuit 24. The density digital values of the negative film 2 are stored in an array corresponding to the pixel 2A as shown.

In this way, when the digital value for each pixel of the negative film 2 or the density value for each pixel regarding the three primary colors is stored in the memory 25, the digital value can be read out from the memory 25 for each pixel of the negative film 2 and used. Can be done. Therefore, if density values such as those shown in FIG. 4(B) are determined and stored for each ROB of the three primary colors, the stored values can be read out and processed through calculations, etc., to achieve the same photographic printing exposure as in the past. It can be used to determine the amount or as a correction amount.

In such photometry of the negative film 2, the frame image of the negative film 2 corresponds to the senna area of the image sensor 11. Correct image processing cannot be performed unless it coincides with the center of image senna 1! The center SAG of the sensor area SA and the center PAC of the image area PA of the frame image of the negative film 2 coincide, but in general, the range of machine installation accuracy is as shown by FAI-PA3 in Fig. 6. The two images do not match within each other and are shifted in the X and Y directions.

For this reason, conventionally, the mounting position of the image information detection device IO was
The center SAG of the sensor area SA was made to match the center PAC of the image area PA by fine adjustment in the Y direction. Therefore, it takes a lot of effort to install and fine-tune the image information detection device, and it also requires a precise mechanical fine-tuning mechanism, which increases costs.Therefore, an effective solution is strongly desired. was.

Additionally, in photo printing, horizontal and vertical feeds are switched for different sizes of negative film.
Adjustments must be made so that the centers of the sensor area and image area coincide with each other for such horizontal and vertical feeding.

(Object of the Invention) This 9.1J'J was made in view of the above-mentioned circumstances, and the object of the invention is to detect the amount of deviation between the sensor address of the image sensor and the screen address of the detected screen, From this amount, calculate the start address where the data of a specific point of the effective screen (for example, the first scanned point of the effective screen) is stored in each case including vertical and horizontal movement, and calculate the data for vertical and horizontal movement and size. By processing accordingly,
An object of the present invention is to provide an image information detection processing method that automatically corrects mechanical positional deviation of an image sensor using software and eliminates the need for a single position adjustment mechanism and position adjustment of an image sensor.

(Summary of the Invention) This invention receives light from an image with an image sensor,
The first method relates to a method of digitally detecting image information of the entire area received by the image sensor for each pixel and storing it in a memory, and processing the stored data.
After associating the memory addresses in the table with the senna coordinates of the image sensor, photometry is performed on the reference negative film with marks etc. attached to the reference position using the image sensor, and the senna coordinates and the screen coordinates are misaligned. Calculate the amount of deviation between the position corresponding to the sensor coordinates of the reference position of the reference negative film when it is not set and the reference position on the sensor coordinate when it is shifted in the XY direction,
Each time the negative film is fed horizontally or vertically, the position data for each size information is read from the first table by inputting the size information, and the start address is obtained from the calculated shift amount and read out from the second table. The image to be detected is measured by the image sensor and stored in the memory, and the image is processed according to the start address of the screen coordinate obtained by referring to the second table. be.

(Embodiment of the invention) In the present invention, an appropriate reference position of the image area is determined in advance using a reference negative film, etc., and the detected image of the negative film or the like is photometered with a two-dimensional image sensor, and the reference position is The positional deviation of the sensor area is automatically corrected based on the amount of deviation in the XY (vertical and horizontal) directions of the position corresponding to the position. In this case, a table is created in advance that indicates the start address, which is the address where the data of the first point to be scanned, such as the upper left corner of the effective screen, is stored at a specific point on the screen of all sizes including vertical and horizontal feed. When normal negative film is photometered, image processing is performed according to the start address of the screen coordinates obtained by referring to this table. Since there is no tilt and only the XY (horizontal and vertical) deviation of the screen is corrected, the reference position can be just one point (for example, the center of the screen). This invention will be explained with reference to the following.

First, adjust the image sensor (image information detection device) so that there is no inclination between the image sensor and the negative film in the printing section.
Determine the effective area on the screen coordinates in the direction and prepare table A of memory addresses and sensor coordinates as shown in Figure 8 (Step S2).The effective area is the length of the negative film in the XY (vertical and horizontal) directions. Since there is no inclination between the image sensor and the image sensor, for example, by setting the upper left of the operating line SL as the start addresses SAT and SAW as shown in Figure 9, vertical feed of 5 and The area of the horizontal movement can be defined on the sensor screen SA of the image sensor. Then, as shown in FIG. 8, memory addresses CI, 2, 3 . ...nx layer) and the sensor coordinates of the image sensor 11 ((1,1), (1,2), (1
, 3), -(u, m)) for each pixel (step S3), and a reference negative film with a mark SPM attached at the center reference position as shown in FIG. Load the 3o in the specified position and measure the light with the image sensor.

Store the photometric data in memory (step S4.S
5) Next, the reference position on the reference negative film 3o when the sensor coordinates and screen coordinates are not shifted! i SPM
Calculate the deviation between the position corresponding to the sensor coordinates of and the reference position on the sensor coordinates when the deviation occurs (step S7)
, this allows the XY relationship between the image sensor and the negative film to
The amount of deviation in the direction is obtained, and based on this, the start address as shown in FIG. 9 is set for vertical feed and horizontal feed for each size of negative film, that is,
First, set the printer to horizontal feed mode in step S7.
), input the size information of the negative film in an appropriate order (step S8), input the size information using the keyboard, etc. in a predetermined order: 135 size → 110 size → 12 size
You may also enter it as B size → disk, etc.

When size information is input, the size and effective area of the negative film of the input size is fixed, so
Read out the xY data of the input size from table A (step S9), find the start address of the input size from this read data, the horizontal feed mode, and the calculated shift amount, and store it in the memory (step 5tO). In addition to setting the start address as follows for all sizes in the horizontal feed mode (step 5ll),
Vertical feeding is carried out in exactly the same manner (step S12~
516), write the vertical and horizontal start addresses of all sizes into memory to create table B shown in FIG. address is stored.

If this start address is known, the horizontal feed area 17 and vertical feed area LT in FIG. 9 can be determined based on the input size.

Next, a normal negative film 2 is loaded in a predetermined position and photometered by the image sensor 11. At the same time, size information and mode information for feeding and vertical/horizontal feeding are input manually from outside (step S18). The information and the vertical and horizontal feed mode information can also be detected by photometrically measuring the Snuke negative film or negative carrier with an image sensor (for example, as disclosed in Japanese Patent Application No. 59-753).
4, Japanese Patent Application No. 80-79407), this may be automatically input, and after calculating the number of pixels in the vertical and horizontal directions of the negative film with reference to Table A (step 519), as described above. Photometry is performed on the negative film (step 520).

Store the data in memory (step 521), then read the corresponding start address data (position information) from table B (step 522), step S19
The image data is processed by extracting the data of the effective screen portion of the memory from the number of pixels found in step 5 and the start address read out (step 5ll). As a result, the image sensor 11 reads the negative film screen as shown in FIG. Even if there is a deviation in the X and Y directions, it is possible to automatically correct the positional deviation and process it.

(Modified example) Although the case where an image of a negative film is detected has been described above, the present invention can be similarly applied to a positive film or the like. Further, although a two-dimensional image sensor has been described, a line sensor may be used for measurement by moving one side relatively.

(Effects of the Invention) As described above, according to the present invention, the amount of deviation between the image sensor coordinates and the actual screen coordinates is detected, and a table is created in which the start address is entered for each size and for each vertical/horizontal feed. Based on the currently set vertical and horizontal size start addresses from this table, the positional deviation of the image sensor is automatically and quickly corrected, eliminating the need for mechanical fine adjustments. Since no adjustment mechanism is required, the device is simple and has the advantage of reducing costs.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing an example of a case where a two-dimensional image sensor is applied to image information detection in a photo printing device, and Figure 2
Fig. 3 is a block diagram showing the control system of the 2D image sensor; Fig. 4 is a block diagram showing the functions of the dimensional image sensor;
Figures (A) and (B) are diagrams illustrating an example of the correspondence between pixels of the original film and stored data. FIG. 85 is a diagram showing the relationship between the senna area and the screen area, FIG. 6 is a diagram for explaining the deviation, FIGS. The figure shows an example of a table, the tJS9 figure is a figure for explaining the start address, and the figure 10 is a figure for explaining the reference position. l...Negative carrier, 2...Negative film, 3...
- Filter, 4... Light source, 5, 11... Lens unit, 6... Black shutter, 7... Photographic paper, 8... Light sensor, 10... Image information detection device, 1
1... Two-dimensional image sensor, 20... Drive circuit,
22...A/D converter, 24...Write control circuit, 2
5...Memory. ←・ Tea l Plan 2 Figure $ 3 Figure CB > Tea 4 Condolence 5 Figure 9 Figure 9 io Figure 3 (B)

Claims (1)

[Claims] Light from an image is received by an image sensor, image information of the entire area where the image sensor receives light is digitally detected for each pixel and stored in a memory, and the stored storage data is stored in a memory. In the processing method, after associating memory addresses in a first table with sensor coordinates of the image sensor, photometry is performed on a reference film with a mark etc. attached to a reference position using the image sensor, and Calculate the amount of deviation of both from the position corresponding to the sensor coordinates of the reference position of the reference film when the coordinates and screen coordinates do not deviate, and from the sensor coordinates of the reference position when the coordinates and screen coordinates are deviated in the XY direction. Then, for each horizontal or vertical feed of the original film and for each size, the position data of the size information is read from the first table, and the specific point of the effective screen in each case is determined from the calculated shift amount. The stored start address is determined and written in a second table, and in the case of normal photometry, the detected image is photometered by the image sensor and stored in the memory, and the second table is referred to. A method for detecting and processing image information, characterized in that image processing is performed according to a start address of the screen coordinates obtained by performing image processing.