JP4395646B2 - Input / output method of film scanner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
For silver-salt printing and digital use, various negative films such as 135 film are captured by a scanner, printed, and related to the scanner input / output method from which the CDR is produced.
[0002]
[Prior art]
Image capture with a conventional film scanner is called a monitor image that is adjusted based on the average color tone and average brightness of the entire image captured for each frame that is captured or for all the frames of a film. Is adjusted by visual sense.
[0003]
[Problems to be solved by the invention]
(Problems in importing)
In the conventional automatic capture method that adjusts the color and density for each frame of the screen, the color and density of the screen are different from each other. Therefore, the whiteness of the white dress becomes cloudy, and the blackness becomes brighter on the screen with many blacks. When using the average value of all frames, the standard is subtly biased slightly for each negative. There was a problem that after the film was cut, the color was different from the first simultaneous print.
And in sensory adjustment, the color changes from person to person and each time it is reprinted, and there is a big problem that the correct shooting result is not produced anyway, and the reproducibility and stability of the image are lacking. There was also a fundamental flaw in the structure, such as taking a reversal-like shot with high-performance film and having no meaning in negative shooting, and unable to answer a high level of needs.
[0004]
(Problems in image processing and printout)
In addition, even if correct data is obtained, the monitor and print adjustment may have been unclear until now, and it was difficult to adjust the monitor and print correctly. There was another big problem that the color of the printout did not match and therefore the adjustment was not possible.
[0005]
[Means for solving the problems]
Therefore, in the present invention, these problems are solved by the method described below.
That is, in the present invention, a clear adjustment standard is used for the monitor adjustment and the overall printout from the scanner capture.
[0006]
That is, the adjustment standard is an achromatic color reflection density: 0.7 (reflectance: about 20%, L; about 52), with intermediate brightness and white and black five-level reflection standards (hereinafter referred to as a five-level standard chart). Using the scanner, adjust each stage so that each stage is correctly reproduced in monitor adjustment and printout.In the film scanner, the reference chart is reproduced correctly for each film type. This problem is solved by providing a function that allows a captured image to be captured and printed with both color information (a, b) and brightness information (L) or only color information fixed.
That is, input / output from a series of negative films such as 135, etc., in monitor adjustment, intermediate brightness (0.4 and 0.10), white (0.1), black (2 0.0) reflective type five-step achromatic reference chart 7 is arranged in a light box 8 having a fluorescent lamp for evaluation of about 5000k colors, and this is called up on the screen 11 of the adjacent monitor 10, the reflective type five-step achromatic reference The digital data of the chart 12 is a digital image of the following RGB achromatic colors (a = 0, b = 0) (reflection density 0.1 = L about 91, 2 is 0.4 = L about 69, 0.7 = L = 52, 1.0 = L approximately 38, and 2.0 = L approximately 16). In printing, when the digital chart 12 is printed by a printer, the printout 15 is 13 lights. Original 7 and monitor under box lighting Adjust the output so that the color, brightness, and contrast of the chart 12 of the surface match as much as possible, and when capturing the scanner, call the chart 17 recorded on the negative film to the monitor, and each part in five steps approximates the appropriate data In the A menu, all shooting screens are adjusted using the same data with fixed brightness information (L) and color information (a, b) without adjustment for each screen, and the B menu Color information (a, b) is fixed, but only the brightness (L) of the shooting screen needs to be adjusted automatically or sensory manually based on the overall brightness of each shooting screen. Accordingly, it is configured to enable accurate image adjustment and strict input / output of an image photographed on the film.
[0007]
(Scanner basics)
Thus, in scanner capture, the film on which the reference chart is recorded is automatically read in its negative, and after each stage is set in gray balance, the entire screen is captured with the same data, It is possible to capture the correct reversal of the shooting results.
[0008]
In addition, the following B mode is prepared with respect to the normal film in which the reference chart is not photographed.
In other words, the gray balance data of the reference negative obtained by properly exposing and developing the 5-step reference chart with various negative (and positive) films from each company is input in advance to the computer as a reference, and depending on the type of film. The data corresponding to the film is automatically called up and set as fetched data.
[0009]
As a result, in both the A mode and the B mode, the captured images of all frames are burned in a state in which the capturing conditions for correcting the gray balance of the RGB data (L, ab data) at the correct density in each stage of each reference chart are fixed. This is the basis for capturing.
In other words, standard print data that reproduces the reference chart correctly, contact prints that are taken without adjustment for each frame, and strict shooting results similar to slides obtained by reversal shooting are taken in, and CDR writing and print exposure are possible. become.
[0010]
In addition to the A menu for capturing images with fixed colors and densities, color information, that is, color tone (color balance) is fixed on the reference chart, and brightness information, that is, image density, is automatically adjusted for each frame based on the average brightness of the image. By providing the function of the B menu indicated by [0006], a menu having an unprecedented effect can be obtained in which only the exposure failure is corrected while the color conforms to the reversal.
By making this correspond to each A mode and B mode, four types of courses are brought about, and if the conventional adjustment method is C, a total of five types can be acquired, which causes problems in conventional acquisition. Many of them can be solved.
[0011]
【Example】
FIG. 1 is an explanatory diagram of density of a five-step reference chart used for various basic adjustments of the present invention. In the figure, 1 is the reflection density 0.1 (L = about 91), 2 is the same 0.4 (L = about 69), 3 is the same 0.7 (L = about 52), and 4 is the same 1.0 ( (L = about 38) and 5 is a chart composed of five achromatic color charts having 2.0 (L = about 16).
Omitted L value in parentheses is the ^{L *} value when the CIE ^L * ^a * ^{b *} colorimetric method ^{a *} and ^{b *} 0, the following ^L * ^a * ^{b *} together ^*, also reflectance The value related to the concentration is in accordance with JIS Z-8729 appendix.
[0012]
In the case of the B mode, the color of the film varies depending on the type of film. Therefore, depending on the film of each company, the standard chart of FIG. 1 is 5500k for daylight and 3200k for electric light. The various negatives are produced by shooting the images, and the data obtained by adjusting each step is stored so that each step of the chart is colorless (a = 0, b = 0) and the appropriate L value on the monitor. In the scanner capture, the reference data of the specific negative is called up according to the type of negative to be captured.
Note that the data on the basis of the specific negative of the B mode referred to here means that the a and b values in the reference chart of FIG. 1 photographed on the specific negative are the above normal values (a ^* and b ^* are set to 0). L ^* value at the time of correction), and the specific negative without the reference chart is adjusted and output using the data in the conversion.
[0013]
At that time, in the A mode A menu, both brightness information (L value) and color information (a, b) are fixed as described above, and both color tone and density are appropriate, exposure correction, and morning and evening color effects. It is possible to obtain accurate shooting results as reversal, including filter effects and shooting failures.
In other words, the reversal film performs positive color reproduction without printing by reversal development, so that a correct color reproduction image can be obtained by photographing with a correct light source at a specified color temperature. However, even in the negative, since adjustment for each screen is not performed in the A mode A menu, a result similar to reversal can be obtained.
However, failures such as filter use mistakes and overexposure and underexposure will appear as failures, so the color information (a, b) is fixed in the A mode B menu, and the brightness information (L value) is set for each screen. Automatic or manual adjustment results in a print that is moderately corrected for exposure failure while conforming to color reversal.
The reason is that in reversal printing, if the brightness (exposure) is not corrected for each screen during printing, overexposure or underexposure results. Therefore, in the silver salt reduction method, adjusting the exposure time only with the same correction filter can relieve the excess or deficiency of the density. In digital, if only L is adjusted without moving the chromaticities a and b, only the density can be obtained with the same color balance. This is because the same result as the silver salt color print can be obtained.
[0014]
Also, color information (a, b) can be easily obtained without trial and error by adding an appropriate ab adjustment value to the B mode according to the shade, tungsten, fluorescent lamp, etc., when shooting light sources other than daylight. Quick sensory correction is also possible, so it is possible to adjust the brightness and color sensuously while enabling strict shooting results, and it is possible to obtain functions and effects that can respond to various needs .
In this case, the appropriate ab adjustment value is a screen shot with low color temperature lighting such as a standard amber system that suppresses blue, tungsten shooting, etc. Since it is reddish as it is, it is a standard blue system that suppresses it, and fluorescent lamps are generally greenish, so an ab adjustment value equivalent to that for which filter adjustment is performed, such as a standard magenta filter, is therefore negative. In this case, since the color is printed in a complementary color, the color conversion value opposite to the reversal may be used.
In addition, the strict photographing result here is corrected regardless of whether the current scanner input / output is preferred for color and density for each screen. The most obvious phenomenon is that even if you intentionally shoot using a red filter, it will be automatically corrected by scanning and printing, resulting in a normal screen with no change, and as in the golf ball example shown in [0019] A significant color failure occurs and correct color reproduction cannot be achieved. In other words, the present invention can usually solve the problem that even if correct shooting is performed, the correct result for each screen is distorted by incorrect correction and a correct result cannot be obtained.
[0015]
By adding the above functions to the conventional automatic capture adjustment function, as already mentioned, according to the A mode, the exposure compensation effect (intentional exposure) and the filter use effect according to reversal shooting. Strict shooting results including can be made in negatives. This is because the normal current output (scanner capture, print) is adjusted according to the overall color tone and overall brightness for each screen. Although the tone prints, the A mode does not make any adjustments for each screen, so that the shooting result can be obtained correctly.
The reason that only the density can be adjusted with the B menu is that the brightness of the screen can be corrected in the same manner as the TTL automatic exposure of the camera while the color balance is fixed.
[0016]
Then, the print data is entered and saved in the index print that clearly indicates the mode and menu for each menu, so that the data can be used for the next print, and the same result can be obtained even after reprinting. This makes it possible to create a laboratory environment that can cope with the future of diversification.
[0017]
(Monitor adjustment basics)
Next, even if correct digital data is obtained, it is meaningless unless correct printing is performed. Therefore, in the present invention, before capture, the monitor and printout are adjusted to the correct state as described below, and adjustment is performed so that image processing from image capture to the final stage can be appropriately performed.
That is, in the present invention, the five-step reference chart is used as an adjustment reference for a series of devices, but the brightness and color of each part of the chart vary greatly depending on the ambient light. Therefore, in the present invention, as shown in FIG. 2, a light box having a fluorescent lamp for color evaluation of about 5000 K, which is close to the standard light and is adjacent to the monitor screen, is provided. A digital reference having the same brightness as that of the five-step reference chart (reflection density 0.1 = L about 91, 2 is 0.4 = L about 69, and 0.7 = L approx. 52, 1.0 = L approx. 38, 2.0 = L approx. 16) Digital image of achromatic color (a = 0, b = 0), which is exactly the same as the reference chart, is created and called when adjusting The color and brightness of the monitor body so that it can be visually recognized at the same brightness level (colorless) and the same brightness level as the actual chart illuminated with a fluorescent lamp for color evaluation having a color and density of about 5000K. , Make basic contrast adjustments .
The “achromatic image (a = 0, b = 0) just like the reference chart” here refers to the actual reflectivity at each stage of the reflection type reference chart according to the JIS conversion table (Appendix Z-8729). ) Is a digital image created by image software with the above L value, and it looks exactly like the original when correctly displayed on the monitor, and if the correct printout is made, a copy of the reflective reference chart is printed RGB digital image of the relationship.
[0018]
(Basic printout adjustment)
On the other hand, printouts printed from the printer are printed with various colors and densities depending on the settings of the image software or printer driver, so that the monitor image can be printed exactly the same. When the five-step digital reference data is printed, when the printout is put in the standard light box, the five-step image of the print is the monitor image and the actual five-step reference chart. Colorless) is performed by adjusting the RGB (or Lab) output data of the printer with image software or a printer driver so that the brightness matches as much as possible.
[0019]
[Action]
In this way, the color relationship (lightness / darkness, contrast, etc.) of the three colors of the actual object 7 (and various object colors) and the monitor image 12 and the printout 15 of the reference chart shown in FIG. By making adjustments so that they match as much as possible, an input / output environment including appropriate peripheral devices that can accurately perform capture, image adjustment, and print adjustment is prepared.
That is, the scanner uptake will be described with reference to FIG. 3. In the case of a white golf ball shown after 18 which should be white, the background color after 19 will be blue, then green, red, yellow, magenta, and cyan. When this color correction is performed so that the current normal frames are averaged with the overall color tone of the screen, the strong color is suppressed by the correction. As a result, white golf balls are yellow in 19, magenta in 20, cyan in 21, 22 In the case of blue, 23 is green, and 24 is red. However, if the conditions for adjusting the 17 reference charts to the correct relationship are fixed and 19 or later are imported without adjusting each frame, The screen is also recorded correctly as a white golf ball without distorting the background color, and the correct state is projected on the monitor, and the projected image is printed correctly. It will be out.
In addition, the images shot in stages (bracketing) with different exposure amounts at the time of shooting on and after 25 in FIG. 4 are as if all of the images were shot with appropriate exposure so that all five images could not be distinguished with a normal print. However, if the conditions for adjusting the 17 reference charts to the correct relationship are fixed as described above and output without adjusting each frame, they can be output as correct shades. This means that an intentional exposure correction effect at the time of shooting, which has been difficult until now, can be surely produced, and in fact, an effect of one third aperture can be produced in the print result.
If the variation in the negative density is an unintentional exposure error that occurred during shooting, it is possible to output an image in which the failure of the exposure is corrected for each screen by adjusting the AB course. Become.
[0020]
【The invention's effect】
In the present invention, as described above, it is possible to accurately capture and print an appropriate image from a negative, which cannot be performed conventionally, and to strictly adjust and print out an image by a monitor.
That is, the conventional film scanner automatically adjusts the image for each frame or for each piece of film, the color (color balance) is the overall color tone, the brightness is the overall brightness, and if that is not appropriate, Due to the addition of human sensory adjustments, no matter how reversal the correct shooting was done, the shooting results have been captured correctly and could hardly be printed.
[0021]
This means that there is no advanced adjustment function of the shooting camera and the performance of the color film used for printing, there is no way to print correctly, the color changes even after printing, the same density even if step exposure is given, etc. While in use, the contradiction that only the same results as a disposable camera were obtained and the camera operation made little sense was left unattended.
[0022]
The present invention fundamentally improves the above-described problems, makes it possible to easily and reliably produce an image that meets the needs of advanced users, and enables high-quality capture and printing.
[0023]
In other words, in the present invention, it is possible to capture based on a clear color reproduction standard, so if the reference chart is recorded in the negative at the time of shooting, the best result is obtained, even if there is no record of the reference chart Since the standard chart data of the used film is called up and loaded according to the used film, the overexposure and the filter use effect are normal and the exposure only is moderately adjusted, as with reversal in normal shooting of the negative. If the results are desired, the B menu can be used to meet the needs, and disposable cameras and films with inaccurate exposures can be printed with the conventional menu, allowing you to freely select the camera to be used, the shooting technique, and the purpose. It becomes possible.
[0024]
The features of the capturing of the present invention are roughly classified by menu. <A menu> is a strict menu, and the conditions for correctly reproducing each stage of the reference chart are fixed (or directly printed). As a result, it is possible to obtain an accurate result that the exposure correction at the time of shooting, the color of the shooting light source such as morning and evening, and the filter effect are reversal.
[0025]
Conventionally, the average adjustment method based on the color and brightness of the screen is <C menu>, and moderate results are obtained for a disposable camera, a low-precision camera, and a beginner menu.
[0026]
The <B menu> is a menu that automatically adjusts or senses the overexposure and underexposure that are often seen in failures, while the colors are colored according to the reversal according to the reference chart. It is a menu that takes advantage of the good point of automatic (AE) adjustment while respecting the shooting camera and shooting technology. Therefore, according to the present invention, the user can select a higher-quality AB menu other than the current C and can make a higher order.
[0027]
In the case of positive film as well as in the case of negative, if you import using the data that has been adjusted for gray balance based on the data of the reference chart taken with the film used, the color and gamma of the film A more streamlined capture is possible.
[0028]
Also, in the CDR production, according to the present invention, the same images for the A, B, and C menus are input to the CDR, and a multi-menu CDR that the user can select according to the purpose of use is supplied. It becomes possible to cope with diversification of In this case, the type of image data to be written is one type, and the ABC mode and the AB menu are adjusted at the time of output upon request, and the result can be made to be displayed by first performing index printing.
[0029]
Therefore, the mode print and menu selection are clearly specified for index prints that are usually made, and if there is a user order, it is up to the user to supply several index prints for each order, and generally other than C. In addition, A-A, A-B, B-A, B-B, etc. can be obtained by index printing with various print results from the same negative that could not be done so far, satisfying the needs. As a result, the industry is expected to expand not only physically but also to develop a new image world, such as increasing demand for index prints and increasing orders by menu. Can be activated.
[0030]
Further, in the present invention, in addition to the merit of increasing the number of menus that have not existed before, there is an original monitor adjustment method as a reason why a higher quality and higher accuracy result than before can be obtained. As already mentioned, in the present invention, the monitor brightness, contrast (gamma) and color are equalized by calling a digital reference chart which is equivalent to a five-step reference chart illuminated by a color evaluation fluorescent lamp having about 5000K. It provides an image processing environment that can be adjusted to be visible and the monitor image can be printed out correctly.
[0032]
In other words, according to the present invention, the reference chart (object color) and the monitor image, and further the printout image, the color, brightness, and contrast are configured to match each other. This eliminates the trouble of not being present, and realizes more accurate image adjustment in sensory adjustment.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a reference chart screen according to the present invention.
FIG. 2 is an explanatory diagram showing a relationship between a light box that can correctly view the reference chart of the present invention, a scanner and a monitor (display), and a printed printout.
FIG. 3 is a negative film in which a reference chart is recorded and a white golf ball is photographed with a different background color.
FIG. 4 shows a negative film in which a reference chart is recorded, and a subject is photographed with increasing exposure amounts in stages.
[Explanation of symbols]
1 Achromatic color chart having a reflection density of 0.1 (L = about 91) 2 Achromatic color chart having the same 0.4 (L = about 69) 3 Achromatic color chart having the same 0.7 (L = about 52) 4 Same as 1. 0 (L = about 38) achromatic color chart 5 2.0 (L = about 16) achromatic color chart 6 Film scanner capable of capturing long roll film and cut negative 7 Standard chart actual 8 Light box 9 Fluorescent lamp for about 5000K color evaluation 10 Monitor body 11 Monitor screen,
12 Digital reference chart resulting in an L-value relationship equal to the actual value of reference chart 7 138 Light box similar to 138 14 Printed printout illuminated by approximately 5000K color evaluation fluorescent lamps 15, 14 16 Developed negative 17 The reference chart portion 18 White golf ball 19 Blue background color 20 Green background color 21 Red background color 22 Yellow background color 23 Magenta background color 24 Cyan background color 25 to 29 This represents an overexposure / underexposure portion.

Claims (1)

In the input / output method of the scanner, input / output from a series of negative films such as 135,
1) In monitor adjustment, a reflection type five-step achromatic reference chart 7 of intermediate brightness (0.4 and 0.10) and white (0.1) and black (2.0) centering on a reflection density of 0.7. Is arranged in a light box 8 having a fluorescent lamp for evaluation of about 5000k color, and the digital data 12 (RGB achromatic color (a = 0) of the reflection type five-step achromatic reference chart which is called on the screen 11 of the monitor 10 adjacent thereto. , B = 0) (reflection density 0.1 = L about 91, 0.4 = L about 69, 0.7 = L about 52, 1.0 = L about 38, 2.0) = L approx. 16)) Adjust the monitor body so that it can be seen visually equal to the actual product 7,
2) In printing, when the digital chart 12 is printed by a printer, the printout 15 is the color of the original chart 7 and the digital chart data 12 on the monitor screen under the illumination of the light box 13 having a fluorescent lamp for color evaluation of about 5000k. , Adjust the output so that the brightness and contrast match as much as possible,
3) In the capture of the scanner, the negative film on which the actual product 7 is recorded is captured and called up on the monitor and adjusted so that each part of the five steps approximates the actual product 7. In the A menu, all shooting screens are adjusted for each screen. The brightness information (L) and the color information (a, b) are adjusted using the same data, and the color information (a, b) is fixed in the B menu, but the brightness of the shooting screen ( L) only allows accurate or manual input and output of images shot on film according to needs by enabling automatic or sensory manual adjustment based on the overall brightness of each shooting screen. A film scanner input / output method characterized by enabling