JPH0567020B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a photographic printing apparatus that can also control whether the developing conditions of a developing machine for developing photographic film (hereinafter sometimes referred to as a film developing machine) are suitable or not. (Conventional technology) Photographic film taken under appropriate conditions (hereinafter referred to as
A film (sometimes simply referred to as a film) becomes an original film from which a photograph of excellent image quality can be obtained only by developing it under appropriate developing conditions corresponding to each film. Therefore, it is necessary to determine and manage the development conditions so as to always obtain appropriate development conditions. Conventionally, the development conditions have been managed by the method described below with reference to the drawings. For this purpose, a control strip (hereinafter, the developed product is referred to as the test photographic film or simply test film) for processing in the user's film processing machine, and a control strip for processing by the user's film processing machine, and a control strip for processing by the photo manufacturer or equivalent. By the way, a reference strip (hereinafter referred to as a reference photographic film or simply a reference film) is produced under precisely controlled developing conditions and is used to determine the developing conditions of the user's film developing machine. ). These control strips and reference strips are exposed in advance at a photo maker or the like under precisely controlled exposure conditions. First, this control strip is developed using a film developing machine on the user's side to produce a test film 81 shown in FIG. The produced test film 81 and reference film 83 are shown at 84 in FIG.
As shown by 92, each has nine different concentration regions. Here, "D-min"
The density of the region 84 marked with is equal to the base density of the film and is the lowest density region among the nine levels. Region 86 labeled "LD" is a low concentration region, and region 90 labeled "HD" is a high concentration region. Next, at predetermined locations on the test film 81 and reference film 83, three areas of cyan (C), magenta (M) and By measuring the transmission density of each color of yellow (Y) and determining whether or not the transmission density of the test film 81 deviates from the transmission density of the reference film 83 by more than a standard value, The film developing conditions using the test film 81 and the reference film 83 were controlled. In this case, as described above, it is necessary to manage various development conditions, such as the temperature and PH value of the developer, and the development time, so that appropriate development can be carried out in each region of different density. In addition, it is possible to select which of the nine density ranges to use depending on the accuracy required for managing the developing conditions.For example, high-end developing machines require delicate development. In order to achieve this, measurements were carried out in all areas of the nine density ranges to more accurately manage the developing conditions. (Problems to be Solved by the Invention) However, conventionally, in managing the development conditions as described above, the transmission density of the film has been measured using a dedicated, separate and expensive densitometer. Furthermore, the work was complicated because the density measurements were carried out individually in a plurality of regions having different densities. By the way, the inventor of this invention has studied various methods for measuring the transmission density of a film to control the developing conditions of a film developing machine without using a special, dedicated and expensive densitometer, and has found a method that has not been proposed in the past. By using a color photoprinting device (hereinafter simply referred to as a photoprinting device), the basic configuration of the device, such as the light source, image sensor, and exposure control section, can be used in common to adjust the transmission density of the film. I discovered that it can be measured. An example of such a photo printing device is the photo printing device shown in FIG. 3A, which was proposed by the applicant of this application. In FIG. 3A, 21 represents a light source for photographic printing, and 23 represents a correction filter. Reference numeral 25 indicates a table of the photographic printer, and this table 2
5 includes an opening 27 and a positioning pin 29 provided around the opening 27. Reference numeral 31 indicates a negative carrier for placing the original film, and there are usually several types available depending on the size of the original film used as the original for photo printing, and it can be detachably mounted on the table 25 as desired. There is. Further, above the negative carrier 31, a lens unit 35, a black shutter 37, and an easel (not shown) for setting photographic paper 39 are provided. Further, near the lens unit 35, there is an image sensor 4 facing the negative carrier 31.
An image information detecting device 41 incorporating 3 is provided. Furthermore, a lens 45 is provided in front of the image sensor 43 to form an image of the negative film onto the image sensor 43. Here, the image sensor 43 is, for example, shown in FIG.
CCD ( Charge Coupled D ) as shown in
An imaging unit 47 that is a surface scanning two-dimensional image sensor that optically captures images.
, a holding section 49 for holding charges transferred from the imaging section 47, and an output register 51 for outputting the charges held in the holding section 49. Furthermore, although not shown, a mosaic filter is closely attached to the imaging section of this two-dimensional image sensor corresponding to each pixel.
Can measure G (green) and B (blue) light. According to this image sensor 43, image information can be divided and detected pixel by pixel, so compared to the conventional LATD ( Large A
(Rea Transmittance Density ) Compared to average density photometry, accurate photometry can be performed over the details of the entire screen. The image detection device 41 is also provided with a processing circuit 53 as shown in FIG. 3C for driving the image sensor and obtaining image information. Reference numeral 54 denotes a drive circuit, which photoelectrically converts the image information formed on the imaging unit 47 by controlling the drive signals S ₁ , S ₂ and S ₃ , and outputs an analog image signal S ₄ from the output register 51 .
It can be output serially as . This signal _S4 is held by a sample hold circuit 55 at a predetermined sampling period, and the held value is converted into a digital signal _S5 by an A/D converter 56, which is then input to a logarithmic conversion circuit 57 to generate a concentration signal. Converted to _S6 . This density signal S ₆ is written into the memory 59 via the write control circuit 58 . Note that the drive circuit 54 drives the two-dimensional image sensor to read image information at a constant speed, and the memory 59 reads the image information at a constant speed.
In order to sequentially write the density signals S ₆ to predetermined positions in the drive circuit 54 , a read speed signal S ₇ is inputted to the write control circuit 58 . Further, the processing circuit 53 includes an exposure control section 6 shown in FIG.
Connected to 1. In FIG. 4, 67 indicates a central processing unit (hereinafter sometimes referred to as CPU). Further, 69 indicates a first memory, in which photographic printing conditions considered to be appropriate are stored. 71
indicates a second memory, which stores a photo printing program for calculating the appropriate exposure amount, a program for rewriting the printing conditions, etc. Various programs are called up in response to input from the keyboard 73, and the photo printing device is operated. You can switch the work content. Reference numeral 75 denotes an output device, which is composed of, for example, a display, a character printer, an alarm means, etc., and can output density values such as transmission density to the display or character printer. Reference numeral 73 denotes a keyboard, through which instructions can be given such as changing the work content of the photo printing device (mode switching), changing photo printing conditions, and outputting photo density values and the like to the output device. When printing a photo using the above-mentioned photo printing device, an original film developed by a film developing machine is placed on the negative carrier 31, and light is emitted from the light source 21 and transmitted through the original film by the lens of the image information detection device 41. A part of the light is imaged on the image sensor 43 as an image. Then, this image is photoelectrically converted for each pixel and for each R, G, and B light, and then converted into a density signal (transmission density) by a processing circuit 53. This density signal is processed according to the exposure amount calculation program stored in the second memory 71 of the exposure control section 61, and the appropriate exposure amount is calculated for each color according to the density of the negative film, and the photographic paper 39 is Print with the correct exposure. In this manner, the above-described photoprinting apparatus can detect the transmission density of a film such as an original film for each pixel of the image sensor. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to easily and accurately measure the transmission density of a film using a light source, an image information detection device, and an exposure control section of a photoprinting device. An object of the present invention is to provide a photographic printing apparatus that can also determine whether the developing conditions of a film developing machine are appropriate or inappropriate based on the following. (Means for Solving the Problems) In order to achieve this object, the present invention provides a negative carrier for mounting an original film used for photo printing, and a supply of light for photo printing to the negative carrier. an easel for mounting photographic paper; an image sensor provided facing the negative carrier for dividing image information of the original film into pixels for photoelectric conversion; and an easel for mounting photographic paper; a processing circuit for obtaining the transmission density of the original film from the signal;
and an exposure control section for calculating an appropriate amount of exposure to photographic paper according to the original film based on the transmission density obtained by the processing circuit, the exposure control section comprising (a ) a means for inputting information indicating whether the photographic film mounted on the negative carrier is an original film used for photographic printing or a test photographic film developed by a photographic film developing machine; (b) from the input means; It is activated when the input information indicates that the photographic film mounted on the negative carrier is the photographic film to be tested, and the transmission of the photographic film to be tested is performed using the output from the image sensor for the original film. (c) means for storing a standard density difference value; (d) a density difference between the transmission density of the photographic film to be tested and the reference density; and the standard density difference value, and outputting a determination result as to whether the condition of the photographic film developing machine is appropriate or inappropriate based on the comparison result. In carrying out the present invention, it is preferable to use the transmission density of a reference film as the reference density, and to detect this transmission density using the above-mentioned photographic printing apparatus. In carrying out this invention, it is preferable to use the recommended concentration as the reference concentration. In carrying out the present invention, it is preferable that the photographic film to be tested has a plurality of different density regions, and these plurality of different density regions are arranged within an area detectable by the image sensor. In carrying out the present invention, it is preferable that the reference photographic film has a plurality of different density regions, and these plurality of different density regions are arranged within an area detectable by the image sensor. In carrying out the present invention, it is preferable that the image sensor is a two-dimensional image sensor. Further, in carrying out the present invention, it is preferable that the image sensor be a line sensor that is used while moving relative to the test film or the reference film. (Function) According to such a photo printing device, not only can conventional photo printing be performed, but also the light source, the image sensor of the image information detection device, and the exposure control section, which are normally used for photo printing, can be used. Using the basic configuration as is, the transmission density of a film developed with a film developing machine is measured, and the film development conditions can be determined and managed based on the transmission density information. Therefore, there is no need to separately prepare a concentration meter. Further, an appropriate determination result is automatically output based on a standard concentration difference value prepared in advance. Furthermore, since the image sensor can detect the transmitted density of the film surface by dividing it into each pixel, even if multiple different measurement regions are provided on the film surface, the density of each region can be obtained at once and independently. I can do it. (Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that these drawings are merely shown schematically to the extent that the present invention can be understood, and the dimensions, shapes, and arrangement relationships of each component are not limited to the illustrated examples. Further, in these figures, the same components are designated by the same reference numerals.
In addition, the same components as in the prior art are denoted by the same reference numerals. First, in the present invention, the test film 81 and reference film 83 already explained with reference to FIG. 2 are used as the test film and reference film as shown in FIG. 1A, for example. In FIG. 1A, reference numeral 10 indicates a reference film, which is a film that has been accurately exposed and developed at a photo maker or a similar location as in the past. A test film 20 that has been exposed under the same conditions as the reference film 10 is usually supplied to a user by a photo manufacturer or the like. This reference film 10 has, for example, a start mark 13, an end mark 15, and a density region 8 of nine levels similar to the conventional one in an area 11 having the same size as one frame of a 35 mm original film.
4 to 92. Note that the reference film 10 and the test film 20
is the start mark 13 and the end mark 15
and each of the density regions 84 to 92 are accurately arranged in a fixed relationship, and an original image produced is photographed and developed. Therefore, the start mark 13 and end mark 15 provided on both films respectively.
The distance between and each of the concentration regions 84 to 92 always has a constant relationship. On the other hand, as already explained with reference to FIG. 4, the second memory 71 of the exposure control section 61 of the photoprinting apparatus can store programs for performing various operations. Therefore, in order to efficiently manage the developing conditions of the film developing machine, a program for managing the developing conditions (details will be described later) is stored in the second memory 71.
Store. Developing Condition Management Method Hereinafter, with reference to the flowcharts shown in FIGS. The configuration will be explained. First, an undeveloped film 20 to be tested supplied from a photo maker or the like is developed by a user's film developing machine to produce a film 20 to be tested. On the other hand, when a work mode for managing developing conditions is selected using the keyboard 73 (see FIG. 4) of the photo printing device, a program for managing developing conditions stored in the second memory 71 starts (see FIG. 4). Steps 101, 103, 105). As a result, information is input to the photo printing apparatus that the photographic film loaded on the negative carrier is a tested photographic film developed by the photographic film developing machine and can be used for determining the condition of the developing machine. At this time, the question "What is the standard density?...Reference film 0, recommended density 1" is displayed on the display which is the output device 75 (step 107), and the operator asks "What is the standard density?" from the keyboard. 1" or "0". If the input is "1", instructions for "reference film set" are displayed on the display (steps 109, 111). Follow the instructions to set the reference film 10 on the negative carrier 31 ( (See Figure 3A).At this time, place the
The light from the light source of the photographic printing apparatus shown in FIG.
A portion of the light that has passed through the lens 45 is imaged on the image sensor 43 through the lens 45. FIG. 1B shows the reference film 10 and the negative carrier 3.
1 is a diagram showing the positional relationship between an image sensor 43 obtained when placed at a predetermined position of 1 and a reference film 10 (or a test film 20). still,
Although the arrangement state of the pixels 19 is shown using dotted lines in a grid pattern, some of the dotted lines are omitted from the illustration. 1st
As is clear from FIG. B, the reference film 10 is placed within the measurable range 17 of the image sensor 43, and the longitudinal direction of the reference film 10 is parallel to the scanning line L of the image sensor 43. Next, an instruction to start concentration measurement is given using the keyboard (step 113). In this case, since the image sensor 43 is a surface scanning two-dimensional image sensor having a mosaic filter as described above, the entire surface of the reference film 10 corresponds to the pixel 19 of the image sensor 43 (see FIG. 1B). Then, the transmission density of each color of R, G, and B corresponding to each color of C, M, and Y for each region is detected. Therefore, each of the nine density regions is divided into a large number of pixels, and the transmission density of each color can be detected in each pixel. In this case, the detection of the transmission density is performed using the pixels P ₁₁ to _{P 1} n shown in FIG. 1B,
It goes in the order of P ₂₁ ~ Pm ₁ ~ Pmn. By the way, the transmission density data of the reference film 10 is sequentially stored in a predetermined position of a memory 59 forming a part of this circuit by the processing circuit 53 shown in FIG. 3C. , data is stored in this memory 59 in the following procedure. First, an instruction is given from the keyboard 73 to use the density value of the reference film 10 as the reference density.
Input to CPU67. CPU6 depending on this input
7 outputs a signal to the memory 59 of the processing circuit 53;
A preset memory area for storing the density value of the reference film 10 is initialized. On the other hand, the image sensor 43 is connected to the reference film 10.
However, until the start mark 13 provided on the reference film 10 is detected, the density value of the previous pixel is not stored in the memory 59 and the density data is stored. It will be penetrated (step 115). Here, when the start mark 13 is detected, this signal becomes a read signal, and the density values of each color obtained for each pixel starting from the pixel immediately after the start mark 13 are sequentially stored in a predetermined memory area of the memory 59 (step 115,
117, 119). Also, when the end mark 15 is detected,
This signal becomes a write end signal, and density values after this pixel are no longer written to the memory 59 (steps 119 and 121). Further, at the same time as the end mark 15 is detected, the scanning of the image sensor is automatically stopped, and the image sensor returns to the initial state and enters a standby state. Next, an instruction to "place test film 20" is displayed on the display. Test film 2
0 is placed on the negative carrier 31 in the same way as the reference film 10 was placed (steps 123 and 125). Next, when an instruction is given from the keyboard 73 to start measuring the transmission density of the test film 20, the reference film 1
0, the density value of each color obtained for each pixel from the pixel immediately after the start mark 13 to the pixel immediately before the end mark 15 is stored in the memory 59.
are sequentially stored in a predetermined memory area. (Step 113
~one two three). The transmission density value data is stored in the memory 59 using the procedure described above.
, the transmission density of each color in pixel units in each of the nine density regions provided on the reference film 10 and the test film 20 can be stored in a one-to-one relationship at a specific address in the memory 59. Next, in order to determine whether the developing conditions are acceptable or not, a processing mode for processing the measured density value data is selected (step 127). Specifically, as data for managing development conditions, the user inputs the density value of which of the nine density regions is to be used for data processing. As mentioned above, the number of concentration ranges to be used varies depending on the purpose of management. In this case, 1~
An input mode (steps 129 and 130) in which nine types of density regions can be individually specified and used, and a standard management mode that uses the three density regions mentioned above, "D-min", "LD", and "HD". (Step 129)
It is structured so that you can choose between. The case where development conditions are managed in the standard management mode will be described below. First, R, G, and From the density values of each color B, the average density value for each color in each density region is determined (step 131). This operation is performed via the CPU 67. For example, if the cyan C density value of each pixel in the "D-min" density region of the test film 20 is a value as shown in FIG. The maximum density value and the minimum density value among the plurality of density values are removed as abnormal values, and the program is programmed to perform statistical calculations such as the average density and variance. This calculation result is stored at a predetermined location in the second memory 71 shown in FIG. Further, this calculation result can be printed out as is if necessary, and the result is output as shown below (steps 135, 137, 139). <Test film "D-min" C density value> Density value data: Memo 15 15: Number of pixels 20 16 15: Abnormal value Indicated by * 14 17: Number of pixels excluding abnormal value 18 9 ^* 16: n = 18 15 ¹⁴ _: is stored in the second memory 71. Furthermore, the average density value is obtained for the "LD" and "HD" density regions in the same manner as "D-min" and is stored in a predetermined position in the second memory 71. Incidentally, since the instruction to set the density value of the reference film 10 as the reference density has already been given in step 109, the same processing as described above for the test film 20 is automatically carried out for the density value of each color of the reference print 10. Each average density value is obtained by performing the following steps, and these values are respectively stored at predetermined locations in the second memory 71. Next, the reference film 10 and the test film 20
The density difference ΔD between the density average values of each color in each density region is determined (steps 135 and 141). In this case, the determined concentration difference is the concentration difference ΔD ₁ ~ as shown in Table 1.
ΔD becomes ₉ .

[Table] Next, the concentration difference ΔD _o (ΔD ₁ to ΔD ₉ ) found here
and a predetermined standard concentration difference value X _o ,
It is determined whether the developing conditions under which the test film was developed are appropriate or not (step 143). Furthermore, this standard density difference value X _o is the reference film 1.
This is an allowable density value of the film 20 to be tested relative to a density value of 0, and is stored in advance in the first memory depending on the type of film, etc. This value X _o can be set for each of ΔD ₁ to ΔD ₉ using the keyboard 73, and furthermore, the value of X _o can be freely rewritten. In this example, the standard density difference value for ΔD ₁ to ΔD ₃ is set as X ₁ , the standard density difference value for ΔD ₄ to ΔD ₆ as X ₂ , and the standard density difference value for ΔD ₇ to _{ΔD 9} as X ₃ . be. Further, the suitability of the developing conditions is determined based on the following conditions (steps 143 to 159). If ΔD _o ≧X _o ...+NG If X _o > ΔD _o ≧0...+OK If 0>ΔD _o ≧−X _o ...−OK If −X _o > ΔD _o ...−NG Furthermore, This determination result is displayed or output on a display or character printer as shown in the example below. D-min LD HD -OK -NG -OK The developing conditions are diagnosed based on the result of determining the suitability of the developing conditions obtained in this way, and if there is an abnormality in the developing conditions, the cause is estimated and a treatment is performed. The specific processing is performed in accordance with a manual supplied with the film developing machine from a photo maker or the like. Note that if the recommended concentration is selected as the reference concentration in the selection of the reference concentration in step 107, an instruction signal _S
is output and the operation jumps to step 123. On the other hand, this signal S _F causes step 149
The reference concentration in is automatically set as the recommended concentration, and the concentration difference between the test concentration and the recommended concentration can be obtained (steps 110 and 141). Further, according to the management method of the present invention, the average density value of each color obtained by measuring the reference film 10 is
The configuration is such that a new recommended density value can be rewritten instead of the recommended density value previously stored in the first memory (steps 161, 163,
169), when measuring to manage the developing conditions of a plurality of film developing machines, it is possible to omit the measurement of the reference film from the second developing machine. Further, the photographic printing apparatus of the present invention is configured such that the density values of each color obtained by measuring the film to be tested can be stored in the first memory as new recommended density values (step 161, 163, 165,
169), by using the density value of the previous test film as the reference density for the next measurement of development condition management and repeating this operation in sequence, it is possible to investigate changes in development conditions over time, etc. . moreover,
It is also possible to compare the measured concentration value with the previous concentration value or the average value of the concentration values over the past few days, and if the difference in concentration exceeds the value, the operator can be notified. . In the above-mentioned embodiment, the method for managing the film development conditions was explained using an example using three different density regions. However, even when there are four or more different density regions, in step 127, the method used for data processing is explained. Specify the concentration area (step 129,
130, 131) Accordingly, film development conditions can be managed according to the purpose using the same procedure as in the embodiment. Further, the reference film and test film suitable for use in the present invention are not limited to the size and configuration example shown in FIG. 1A, but may have a shape, size, and pattern arrangement depending on the purpose. I can do it. Furthermore, in the above embodiment, the density value obtained from the test film or reference film by the image sensor is stored in the memory only after the start mark is detected. It is also possible to perform data processing by first storing all density values within a measurable range in a memory, and then detecting a start mark and an end mark in the memory during data processing. Furthermore, in the above embodiment, the density value of each color is detected by attaching a mosaic filter closely to the image sensor. Alternatively, the density values of each color may be detected by inserting the light beam into the optical path between the reference film and the image information detection device in accordance with the required color. Furthermore, the image sensor 43 provided in the photoprinting device is not limited to a two-dimensional CCD image sensor, but a MOS ( M etal Oxide
A two-dimensional image sensor (Semiconductor ) or the like may also be used. Furthermore, two-dimensional reading may be performed by using a line sensor composed of a CCD, MOS, etc., and moving the line sensor and the film to be tested relative to each other. Further, the arrangement of the image information detection device 41 provided in the photo printing apparatus is not limited to the embodiment, and the transmitted light from the film may be detected indirectly through a mirror or the like. (Effects of the Invention) As is clear from the above description, according to the photoprinting apparatus of the present invention, a test film or , measure the transmission density of the test film, and then determine the suitability or unsuitability of the photographic film development conditions based on this transmission density and the reference density (for example, the recommended density or the transmission density of the reference photographic film similarly measured with this photoprinting device). The judgment results can be automatically obtained. Furthermore, since the image sensor can detect the transmission density of the test film or the reference film by dividing it into pixels, it is possible to accurately measure the transmission density over the details of the entire screen of these photographic films. Furthermore, even if a plurality of different photometric areas are provided within one screen, the density of each of the plurality of areas can be detected in one measurement, so the measurement time can be shortened. Therefore, according to the photoprinting apparatus of the present invention, there is no need to separately purchase and prepare a densitometer, perform complicated density measurements, and judge developing conditions based on the measurement results, thereby simplifying the work of the operator. Costs for managing development conditions can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1A is a plan view showing a test film or reference film suitable for use when the photographic printing apparatus of the present invention is used in the development condition management mode of the developing machine, and FIG. 1B is a plan view of the test film. or a diagram explaining the positional relationship between the reference film and the image sensor, and FIGS. F is a diagram for explaining the developing condition management method of the present invention, FIG. 2 is a plan view showing the test film or reference film used in the conventional photographic film developing condition management method, and FIG. FIGS. 3B and 3C are diagrams for explaining the photographic printing apparatus of the present invention; FIGS. 3B and 3C are diagrams for explaining the conventional photographic printing apparatus and the present invention; and FIG. 10... Reference film, 11... Area for one frame of 35mm film, 13... Start mark, 1
5... End mark, 17... Measurable area of image sensor, 19... Pixel, 20... Test film, 21... Light source, 31... Negative carrier, 4
1... Image information detection device, 43... Image sensor, 45... Lens, 53... Processing circuit, 61...
...Exposure control section, 84-92...Density region.

Claims (1)

[Scope of Claims] 1. A negative carrier for mounting an original film used for photographic printing, a light source for supplying light for photographic printing to the negative carrier, an easel for mounting photographic paper; an image sensor provided toward a negative carrier for dividing image information of the original film into pixels and photoelectrically converting the image information, and a processing circuit for obtaining the transmission density of the original film from the signal obtained by the image sensor;
and an exposure control section for calculating an appropriate amount of exposure to photographic paper according to the original film based on the transmission density obtained by the processing circuit, the exposure control section comprising (a ) a means for inputting information indicating whether the photographic film mounted on the negative carrier is an original film used for photographic printing or a test photographic film developed by a photographic film developing machine; (b) from the input means; It is activated when the input information indicates that the photographic film mounted on the negative carrier is the photographic film to be tested, and the transmission of the photographic film to be tested is performed using the output from the image sensor for the original film. (c) means for storing a standard density difference value; (d) a density difference between the transmission density of the photographic film to be tested and the reference density; and the standard density difference value, and means for outputting a judgment result as to whether the condition of the photographic film developing machine is appropriate or inappropriate based on the comparison result. . 2. Claim 1, wherein the photographic film to be tested has a plurality of different density regions, and the plurality of different density regions are arranged within an area detectable by the image sensor. Photographic printing equipment as described. 3. The photographic printing apparatus according to claim 1, wherein the image sensor is a two-dimensional image sensor. 4. Claim 1, characterized in that the image sensor is a line sensor that is used by moving relative to the test photographic film or the reference photographic film.
Photoprinting device as described in Section 1.