JPH0616154B2 - Printing machine for additional photo - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus for a reprint photograph which is exposed on the basis of image information of an already-printed photographic paper when the photographic paper is reprinted.

[Prior Art] Generally, in a photographic printing apparatus, photographic paper is irradiated with the transmitted light of a light source transmitted from an original image film through a lens unit to be exposed. In the printing apparatus used for printing a color print, a light beam from a light source reaches the original image film through a light control filter including yellow (Y), magenta (M), and cyan (C) complementary color filters. It is like this.

Here, an image density sensor composed of an optical sensor such as a photodiode is provided between the original film and the lens unit so that the image density information of the original film can be detected.

This image density information is sent to the exposure controller, the exposure amount of each color is calculated by the following equation, and the photographic printing process can be performed with the optimum exposure amount suitable for the original image film. This is based on the well-known Evans theorem.

lagE _i = logE _Ni + C _j (D _Nj −D _NNj ) ... (1) where, E: exposure amount of the original image film E _N : exposure amount of the standard original film C: correction coefficient according to the density of the original image film D _N : original image Film LATD D _NN : Standard original picture film LATD i: Any color of red, green or blue j: Any color of Y, M or C By the way, such a photoprinting device first prints at the same time. There is no problem at the stage, but if the customer reorders such as reprinting and prints based on the LATD of the original film, even if the same printing and developing machine is used at the time of the previous printing and the printing at this time Even if it happens, the finished product may be different from the finished product at the time of simultaneous printing due to changes in the light source or the developing solution, which is one of the complaints. Incidentally, in the case of an original image film having a color that is deviated in particular, the operator visually judges it and corrects it by mixing the subjectivity. Therefore, the same correction is not always made even when reordering, and the same complaint occurs.

Therefore, the applicant has proposed to adjust the density at the time of printing based on the printing paper printed by the original film at the time of printing to make the finish the same as the original printing paper. There is. In this case, it is preferable to detect the density of the image printed on the printing paper, the light beam from the light source is reflected by the printing paper, the density of this reflected light is detected, and based on this information, according to the equation (1), The obtained exposure amount is corrected.

[Problems to be solved by the invention]

However, the light source for the transmitted light that passes through the original film and the light source for the reflected light that is reflected on the photographic paper have different configurations. May not match,
In some cases, optimum exposure control could not be performed.

In consideration of the above facts, the present invention detects the image information of the photographic paper that has already been printed well in the same irradiation state as when detecting the image information of the original film, and performs additional printing with the same finish as the original finish. It is an object to obtain a printing apparatus for reprinted photographs capable of performing.

[Means for solving problems]

The printing apparatus of the reprinted photographic image according to the present invention has the same color as the finished state of the preprinted photographic printing paper based on the image information of the preprinted photographic printing paper which has been subjected to the printing processing by this original drawing film in addition to the image information of the original printing film. A printing apparatus for reprinting a photograph to control the exposure so as to finish the taste, having a light source for irradiating the original image film with the transmitted light and the reflected light reflected by the already-printed photographic paper. It is characterized in that the image information of the original image film and the image information of the pre-printed photographic printing paper are set in the same irradiation state so that the information detection criteria are matched.

[Action]

According to the present invention, the image information of the printing paper which has already been printed in good condition is detected, and the information of both the image information of this printing paper and the image information of the original film conventionally applied to the exposure amount correction is used. Since the exposure amount is determined, it can be finished in the same manner as the already printed printing paper.

Further, in the present invention, since the transmitted light which passes through the original film and the reflected light which is reflected by the preprinted photographic paper are emitted from the same light source, the original film and the preprinted photographic paper are provided under the same conditions such as the light quantity and color tone. Image information can be obtained.

Example of Invention

Embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 1 shows an outline of an example of the photographic printing apparatus 10, in which light emitted from a light source 12 is applied to a negative film 18 as an original image film arranged on a carrier 16 via a light diffusion tube 14. However, the structure is such that it is printed on the photographic printing paper 22 through the lens unit 20.

Between the light source 12 and the light diffusion tube 14, yellow (Y),
A dimming filter 24 including three complementary color filters of magenta (M) and cyan (C) is interposed. The dimming filter 24 is controlled by a signal from an exposure controller 26 via drivers 28, 30, 32, respectively. Normally, the colors unnecessary in the process of white light exposure are changed to Y, M, C. The color is reduced on each filter.

Further, a density sensor 34 for detecting image density information of the three primary colors of red (R), green (G) and blue (B) is arranged between the negative film 18 and the lens unit 20. . The density sensor 34 is composed of a group of optical sensors such as photodiodes, and supplies the density distribution information signal of the negative film 18 transmitted by the light source 12 to the exposure controller 26 via the amplifier 36.

The exposure controller 26 adjusts the amounts of the three color components of YMC based on the well-known Embassian theorem to determine the correction coefficient so that the color becomes gray, and the exposure amount E is calculated according to the equation (1).
_i is controlled.

That is, after the energization (exposure start) of the solenoid 40 that constitutes the shutter 38 by this E _i, each dimming filter 24 is inserted into the optical path from the one whose exposure amount is sufficient, and the exposure of that color is finished. The entire exposure time is controlled.

In the carrier 16 in which the negative film 18 is arranged, the photographic paper arranging section 44 for arranging the photographic paper 42 which has already been printed
Is formed, which serves as an arrangement portion of the printing paper 42 already printed by the negative film 18.

An opening 46 is formed on the printing surface of the printing paper 42 of the printing paper placement unit 44.
Is provided, and the light source 1 is provided via an optical system such as a mirror 48.
2, the light rays applied to the negative film 18 and the light rays applied to the photographic printing paper 42 have the same change. The optical system such as the mirror 48 disposed between the light source 12 and the printing paper 42 is the light source 1.
Other optical systems such as a lens unit may be used depending on the arrangement position of 2, and it is not always necessary when the light source 12 can directly irradiate the negative film 18 and the printing paper 42.

A density sensor 50 having the same structure as the above-described density sensor 34 is provided between the mirror 48 and the photographic paper arranging portion 44 of the carrier 16.
Is arranged so that the density of the printing surface of the printing paper 42 reflected by the irradiation from the light source 12 (in this embodiment, the light source 12A shown by the imaginary line in FIG. 1 reflected by the mirror 48) can be detected. ing. This density is preferably an average value of the densities of the entire image.

The density information signal detected by the density sensor 50 is supplied to the exposure controller 26 via the amplifier 52. The bottom surface 54 of the photographic printing paper arranging section 44 is gray, and the photographic printing arranging section 4 is printed during the printing process of the negative film 18.
When the photographic printing paper 42 is not placed on the No. 4, the same density information signal as that in the correction-free state in the Evans' theorem is supplied to the exposure controller 26.

The exposure controller 26, as shown in FIG.
U56 (Central Processing Unit), RA
M58 (random access memory), ROM60
It is composed of a (read only memory) and a bus 62 such as a data bus or a control bus connecting these.

The output signals of the amplifiers 36 and 52 are respectively supplied to the input / output port 66 via the A / D (analog / digital) converter 64, and based on these signals, the solenoid 40 and the drivers 28, 30, A signal is supplied to 32.

The ROM 60 stores the following equation based on the equation (1).

logE _i = logE _Ni + C _j (D _Nj −D _NNj ) + γ _j (D _Pj −D _NPj ) ... (2) where γ: correction factor according to print paper density D _P : print paper density D _NP : standard print Paper Density Based on this equation (2), the CPU 56 calculates the exposure amount E _{i of} each color (where i is red, green, and blue), and further calculates the exposure time and the operation time of each light control filter 24. It is supposed to be done.

Next, the carrier 16 will be described in detail.

As shown in FIG. 3, the carrier 16 is composed of a base 70 and a lid 72, one side of each long side of which is connected by a hinge 74 so that the principal surfaces can be brought into contact with each other. Base 70
A limit switch 75 is attached to this so that the open / closed state of the lid 72 can be detected. The signal line of the limit switch 75 is connected to the exposure controller 26.

Two protrusions 76, 78 extending parallel to the long side are integrally formed on the front side of the base 70 on the paper surface of FIG. 3, and a space between them is used as a guide passage 80 at both ends in the width direction of the negative film 18. It is said that. Thereby, the negative film 18 is surely moved linearly when it is moved in the longitudinal direction (direction of arrow A in FIG. 3).

The negative film 18 is provided at an intermediate portion in the longitudinal direction of the guide passage 80.
A rectangular through hole 82 corresponding to one portion of the above is provided, and the negative film 18 receives the light beam from the light source 12 from there.

Further, the through hole 8 is formed in the lid body 72 in correspondence with the through hole 82.
6 is provided so that the light rays transmitted through the negative film 18 are applied to the lens unit 20.

Below the through hole 86 in FIG. 3, a substantially U-shaped frame 88 is provided.
Is attached. As shown in FIG. 4, the cross section of the frame 88 at a right angle to the axis is substantially L-shaped.
2 can be inserted and held. The base 70 is provided with the opening 46 corresponding to the portion surrounded by the frame 88, and as shown in FIG. 1, the printing paper 42 is printed with the lid 72 closed. The surface is adapted to face the mirror 48.

That is, the predetermined pattern of the negative film 18 is the through hole 8
By inserting the end of the photographic paper 42, which has been satisfactorily printed by this pattern at the time of being conveyed to the positions 2 and 86, into the frame 88, it is possible to obtain the density information of the photographic paper 42 when the negative film 18 is exposed. You can do it.

The printing procedure of the photographic printing apparatus configured as described above will be described below with reference to the flowchart of FIG. The light source 1
It is assumed that 2 is already energized and irradiated with light rays.

First, place the negative film 18 on the carrier 16 and
The pattern to be baked is moved in the direction indicated by the arrow A or in the opposite direction to correspond to the through hole 82. At the time of this movement, the negative film 18 has the protrusions 76 of the carrier 16 at both widthwise end portions thereof.
Since it is guided by 78, it can move linearly without meandering.

When the worker completes the placement of the negative film 18 at the predetermined position, the worker next inserts the pre-baked printing paper 42 corresponding to the pattern of the negative film 18 into the frame 88, and the printing paper placement unit 44. To place. This allows the carrier 16
, A predetermined pattern of the negative film 18 and a photographic printing paper 42 favorably printed by the predetermined pattern can be arranged as a pair.
Work such as matching becomes easy.

After the above preparatory steps are completed, in step 104, when the lid body 72 of the carrier 16 is rotated about the support shaft of the hinge 74 to bring the base 70 and the lid body 72 into the closed state, the limit switch is turned on. Detected at 75, step 1
Move to 06. In step 106, the density sensor 34
Thus, the density of the pattern is detected by the light beam from the light source 12 which has passed through the negative film 18. At the same time, the light source 12 also irradiates the photographic printing paper 42 via the mirror 48.
This light ray is reflected by the printing paper 42, and the density of the image printed on the printing paper 42 is detected by the density sensor 50.

That is, with the same light source, the negative film 18 and the printing paper 4
Since the densities of 2 are detected, there is no influence of each lamp fluctuation that occurs when the densities are measured with different light sources, and the power for energizing the light sources can be reduced.

Here, the densities of the negative film 18 and the printing paper 42 detected by the density sensors 34 and 50 are the average values of the entire image, but may be only one point of an important part. Also, photographic paper 4
2 is not arranged in the photographic paper arranging section 44, the bottom surface 54 of the photographic paper arranging section 44 is preliminarily grayed.
The density detected by the density sensor 50 is substantially equal to the density of standard photographic printing paper.

In step 108, the exposure amount of each color is calculated by the equation (2) based on each density detected in step 106. When the photographic printing paper 42 is not arranged as described above, the same calculation as in the equation (1) is performed.

Next, the exposure amount of each color obtained in step 108 is converted into the exposure time, sorted in the order of shorter exposure time in step 110, and then in step 112, the shutter 3 is printed.
Open 8 (energize solenoid 40). As a result, the light transmitted through the negative film 18 in a predetermined amount is transmitted to the lens unit 20.
The photographic paper 22 is reached via the and the exposure is started.

In step 114, each dimming filter 24 is operated for a predetermined period of time to cut in order from the color for which exposure has been completed, and when exposure for all colors is completed, the process proceeds to step 116 and the shutter 38 is closed.

Next, at step 118, the worker opens the carrier 16 and this is detected by the limit switch 75, and the printing process ends. If another original image film and printing paper are set in the carrier 16 and the carrier 16 is closed, the printing process is continued.

Next, the subroutine of step 114 will be described in detail with reference to FIG.

The dimming filters 24 are rearranged in the order of shorter exposure time in step 110. For example, if the order is yellow (filter F1), magenta (filter F2), cyan (filter F3), yellow exposure is first performed in step 122. It is determined whether or not the time has ended, and when it is determined that the time has ended, a signal is sent from the exposure controller 26 to the guide bar 28 in step 124, and the filter F1 is inserted into the optical path. Next, when it is determined in step 126 that the magenta exposure time has ended, the driver 30 is operated in step 128 to insert the filter F2 into the optical path. Similarly, if it is determined in step 130 that the cyan exposure time, which is the longest exposure time, has ended, in step 132 the motor 32 is operated to insert the filter F3 into the optical path, and the process returns to the main routine.

As described above, since each light control filter is controlled in consideration of not only the density of the negative film 18 but also the density of the already printed good printing paper 42, the printing paper and the printing paper 42 (for example It is possible to make the finish almost the same as that of the photographic paper for simultaneous printing).

Further, since the light source 12 is shared by the negative film 18 and the photographic printing paper 42, there is no fluctuation in chromaticity and the like, and the cost can be reduced as compared with the case where separate light sources are provided.

Further, since the negative film 18 and the corresponding preprinted photographic printing paper 42 can be arranged on the carrier 16 as a pair,
These collation work becomes easy.

〔The invention's effect〕

As described above, the printing apparatus for the additional photo according to the present invention is
In addition to the image information of the original film, a light source for detecting the image of the photographic paper that has already been printed in good condition. It has an excellent effect that it is possible to perform additional heating, and at the same time, an inexpensive lamp, a light source, and a power source therefor can be used in common so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a photographic printing apparatus according to this embodiment, FIG. 2 is a control block diagram, FIG. 3 is a perspective view of a carrier, FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a control flow chart of this embodiment, and FIG. 6 is an exposure control subroutine. 10 ... Photographic printing device, 12 ... Light source, 16 ... Carrier, 18 ... Negative film, 24 ... Dimming filter, 26 ... Exposure controller, 34, 50 ... Density sensor, 42 ... Printing paper, 44 ... Printing paper placement section.

Claims (1)

[Claims] 1. Exposure control based on the image information of the original film and the image information of the already-printed photographic paper which has been subjected to printing processing by the original image film so that the color tone is the same as the finished state of the already-printed photographic paper. A printing apparatus for reprinting a photograph, having a light source for irradiating these in order to obtain transmitted light that passes through the original film and reflected light that is reflected by the already printed printing paper, and image information of the original film. A printing apparatus for reprinted photographs, which is characterized in that the image information of the already printed printing paper is in the same irradiation state and the information detection criteria are matched.