JP2000004353A - Image processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing method, which automatically sets a correction condition and performs print processing even between different image processors, based on an image file which is produced by reading an image recorded on a photographic film. SOLUTION: A digital laboratory system 310 in which an image processing part 316 is not able to perform ambient light quantity correction nor aberration correction records a lens type and an image processing condition, which are read from a film as additional information together with the image data on a CD-R disk 318. In a digital laboratory system 10, an image processing part 16 reads an image file recorded on the disk 318 and reads lens data corresponding to the lens type from a lens data supplying section 234, and a parameter calculating section 235 calculates a parameter and performs ambient light quantity correction and aberration correction. The image data after correction is subjected to print processing in an outputting section 28 and a printed image 240 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing system and an image processing method, and more particularly, to image correction of an image recorded on a photographic light-sensitive material based on lens data for aberration correction and peripheral reduction. The present invention relates to an image processing method capable of performing light correction.

[0002]

2. Description of the Related Art Heretofore, a film with a lens (hereinafter referred to as LF) capable of taking a photograph easily at low cost.
It has been known. In many cases, a simple lens is used as the lens mounted on the LF, such as distortion (distortion aberration: lateral magnification varies depending on the size of an image), chromatic aberration of magnification (pixel positions differ between R, G, and B colors), and the like. Therefore, it is desirable to perform the above-described aberration correction according to the type of lens.

In recent years, an image processing apparatus capable of photoelectrically reading a frame image recorded on a photographic film by a reading sensor such as a CCD and performing various corrections on the read digital image data to perform a printing process has been developed. Are known. Further, in such an image processing apparatus,
The read image can be recorded as an image file on a recording medium such as a memory card or a floppy disk. When reprinting, the recording medium can be brought into a laboratory and printed.

In order to perform the above-described aberration correction, it is necessary to hold lens data for performing correction in accordance with the lens type, and to perform aberration correction based on the lens data. Requires complicated processing, so that an inexpensive image processing apparatus cannot perform such processing.

[0005] For this reason, even if an image file is created by an image processing apparatus that cannot correct aberration, and reprinted by an image processing apparatus that can correct aberration based on the image file, Since it is not possible to specify whether the image was taken with a proper lens, it is necessary to specify the lens type again, and the aberration cannot be automatically corrected.

[0006]

SUMMARY OF THE INVENTION In view of the above, the present invention automatically sets correction conditions between different image processing apparatuses based on an image file created by reading an image recorded on a photographic film. It is an object of the present invention to provide an image processing method capable of performing a printing process.

[0007]

According to a first aspect of the present invention, there is provided a method for reading photographic lens characteristic information previously recorded on a photographic material and an image recorded on the photographic material. Along with the image data obtained by the reading, additional information including the photographing lens characteristic information and information on whether or not the image data has been corrected is recorded on a recording medium, and the additional information recorded on the recording medium is recorded. Reading additional information, and if the image data has not been corrected, reads correction information corresponding to the photographing lens characteristic information, and corrects the image data based on the correction information. .

According to a second aspect of the present invention, the correction information includes:
It is characterized by information for performing at least one of correction according to the aberration of the lens and correction according to the lack of peripheral light amount by the lens.

According to a third aspect of the present invention, the additional information includes:
The image processing apparatus further includes center coordinate information at the time of capturing the image and reading resolution information of the image, wherein the correction is performed based on the central coordinate information at the time of capturing, the reading resolution information, and the correction information.

According to the first aspect of the invention, photographing lens characteristic information recorded in advance on a photographic photosensitive material is read. In addition,
The photographing lens characteristic information is, for example, a lens type (identification ID) indicating the type of the photographing lens or information indicating the characteristic of the photographing lens for correcting deterioration of image quality caused by the photographing lens (for example, aberration correction of a read image is performed. Lens correction equation, correction coefficient of this aberration correction equation, information of camera model, etc.). Then, the image recorded on the photographic photosensitive material is read, and the photographic lens characteristic information and the information as to whether or not the image data has been corrected, together with the read image data, are stored in a CD-R (Compact Disc-Recordable). ) Or a recording medium such as a memory card. As the photographing lens characteristic information to be recorded, either the lens type indicating the type of the photographing lens or the information indicating the characteristic of the photographing lens for correcting image quality deterioration caused by the photographing lens may be recorded. Then, when printing based on the image data recorded on the recording medium, the additional information recorded together with the image data is read, and it is determined whether or not the image data has been corrected. If it is determined that the correction has not been performed, the correction information corresponding to the photographic lens characteristic information recorded in advance is read out, and the image data is corrected based on the correction information. The correction information may include information for performing at least one of correction according to the aberration of the lens and correction according to the insufficient peripheral light amount by the lens, as in the second aspect of the invention.

If it is determined that the correction has been performed, the above correction is not performed. For this reason, there is no possibility that the correction is performed by mistake. In addition, in an inexpensive image processing apparatus that cannot perform correction, if only the additional information is recorded, if the image processing is performed by an image processing apparatus that can perform the correction, the additional information is read. The correction can be made automatically. Therefore, it is not necessary to specify photographing lens characteristic information and the like.

Further, the additional information may further include center coordinate information at the time of photographing the read image and information on the image reading resolution at the time of photographing the read image. In this case, an effect is obtained when, for example, a trimming process is performed on the read image. That is, when the center coordinates are shifted by performing a zoom or shift process on the read image, the correction condition is automatically determined by reading out the center coordinates and the resolution at the time of shooting included in the additional information. Peripheral light amount correction can be performed.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, the digital lab system according to the present embodiment will be described. FIG.
1 shows a schematic configuration of a digital laboratory system 10 according to the present embodiment, and FIG. 2 shows an appearance of the digital laboratory system 10. As shown in FIG. 1, the lab system 10 includes a line CCD scanner 14, an image processing unit 16, a laser printer unit 18, and a processor unit 20.
4 and the image processing unit 16 are integrated as an input unit 26 shown in FIG. 2, and the laser printer unit 18 and the processor unit 20 are integrated as an output unit 28 shown in FIG.

The line CCD scanner 14 is for reading a frame image recorded on a photographic film such as a negative film or a reversal film.
5 size photographic film, 110 size photographic film, and photographic film with a transparent magnetic layer (24
0 size photographic film: so-called APS film), 12
Frame images of photographic film of size 0 and size 220 (Brownie size) can be read. The line CCD scanner 14 reads the frame image to be read by the line CCD, and outputs image data.

In this embodiment, an LF (not shown) is used.
A digital lab system 10 in which a 240-size photographic film (APS film) 102 accommodated in a computer is applied will be described. As shown in FIG. 4, the APS film 102 is provided with a magnetic recording layer 116.
In the magnetic recording layer 116, information of a photographing lens mounted on the LF (in this embodiment, a lens type indicating the type of the photographing lens) is recorded in advance (for example, at the time of manufacture). Optical information (barcode 112) is recorded in advance (for example, at the time of manufacture) on the APS film 102, and the barcode 112 indicates a film type. Note that the lens type may be recorded as a barcode, and the film type may be recorded on the magnetic recording layer.

The image processing section 16 stores image data (scanned image data) output from the line CCD scanner 14.
Is input, image data obtained by photographing with a digital camera, image data obtained by reading a document other than a frame image (for example, a reflective document) with a scanner, image data generated by a computer, etc. It is configured such that an image file can be externally input (for example, input via a storage medium such as a CD-R or a memory card, or input from another information processing device via a communication line). ing.

The image processing section 16 performs image processing such as various corrections on the input image data and outputs the image data to the laser printer section 18 as recording image data. Also,
The image processing unit 16 outputs the processed image data to the outside as an image file (for example, outputs the image data to a storage medium such as a CD-R or a memory card, or transmits the image data to another information processing device via a communication line). And so on).

When outputting as an image file, the lens type recorded on the magnetic recording layer 116 of the APS film 102 and, as will be described later in detail, when performing image processing, aberration correction and peripheral light amount correction are performed. Information on whether or not the prescan was performed, the center coordinates of the prescan image, prescan,
Information such as resolution at the time of performing fine scan can be recorded as additional information.

The laser printer section 18 is provided with R, G, and B laser light sources, and irradiates a photographic paper with laser light modulated in accordance with recording image data input from the image processing section 16 to perform scanning exposure. To record an image on photographic paper. Further, the processor unit 20 performs each process of color development, bleach-fix, washing, and drying on the photographic paper on which the image is recorded by the scanning exposure by the laser printer unit 18. Thus, an image is formed on the printing paper.

(Configuration of Image Processing Unit 16) Next, the configuration of the image processing unit 16 will be described with reference to FIG. The image processing section 16 is provided with a line scanner correction section 122 corresponding to the line CCD scanner 14. The line scanner correction unit 122 includes a signal processing unit including a dark correction circuit 124, a defective pixel correction unit 128, and a light correction circuit 130 corresponding to the R, G, and B image data output in parallel from the line CCD scanner 14. Three systems are provided.

The dark correction circuit 124 includes a line CCD 116
In the state where the light incident side is shielded from light by the shutter, data input from the line CCD scanner 14 (data representing the dark output level of each cell of the sensing unit of the line CCD 116) is stored for each cell, and CCD
From the scanned image data input from the scanner 14,
The correction is performed by reducing the dark output level of the cell corresponding to each pixel.

Also, the photoelectric conversion characteristics of the line CCD 116 vary from cell to cell. Defective pixel correction unit 12
In the bright correction circuit 130 at the subsequent stage of 8, the line CCD 116 reads the adjustment frame image with the line CCD 116 in a state where the frame image for adjustment with a constant density is set on the line CCD scanner 14. The gain is determined for each cell based on the image data of the adjustment frame image input from 14 (the density variation of each pixel represented by this image data is caused by the variation of the photoelectric conversion characteristics of each cell). Every line CCD scanner 14
The image data of the frame image to be read which is input from is corrected for each pixel according to the gain determined for each cell.

On the other hand, if the density of a specific pixel is significantly different from the density of other pixels in the image data of the frame image for adjustment, the cell corresponding to the specific pixel in the line CCD has some abnormalities. The specific pixel can be determined as a defective pixel. The defective pixel correction unit 128 stores the address of the defective pixel based on the image data of the adjustment frame image, and stores the defective pixel data in the image data of the frame image to be read input from the line CCD scanner 14. Generates new data by interpolating from the data of surrounding pixels.

The line CCD has three lines (CC)
D cell rows) are sequentially arranged at predetermined intervals along the transport direction of the APS film 102, so that the line C
There is a time difference between the timings at which the CD scanner 14 starts outputting the image data of the R, G, and B component colors. The line scanner correction unit 122 outputs the R, G, and B image data of the same pixel on the frame image at the same time.
The output timing of image data is delayed by a different delay time for each component color.

The output terminal of the line scanner correction unit 122 is connected to the input terminal of the selector 132.
Are output to the selector 132. The input terminal of the selector 132 is also connected to the data output terminal of the input / output controller 134. From the input / output controller 134, externally input file image data is input to the selector 132. Selector 1
The output terminals of the 32 are connected to the input / output controller 134 and the data input terminals of the image processor units 136A and 136B, respectively. The selector 132 can selectively output the input image data to each of the input / output controller 134 and the image processors 136A and 136B.

The image processor unit 136A includes a memory controller 138, an image processor 140, and three frame memories 142A, 142B, 142C. Frame memories 142A, 142B, 142C
Has a capacity capable of storing image data of one frame image of one frame, and the image data input from the selector 132 is stored in any of the three frame memories 142. The memory controller 138 The address at which the image data is stored in the frame memory 142 is controlled so that the data of each pixel of the input image data is stored in the storage area of the frame memory 142 in a fixed order.

The image processor 140 takes in the image data stored in the frame memory 142, performs gradation conversion, color conversion, hypertone processing for compressing the gradation of an ultra-low frequency luminance component of the image, and sharpness while suppressing graininess. Various image processing such as hyper sharpness processing for emphasizing is performed. Note that the processing conditions of the above image processing are automatically calculated by an auto setup engine 144 (described later), and the image processing is performed according to the calculated processing conditions. The image processor 140 is connected to the input / output controller 134, and the image data subjected to the image processing is temporarily stored in the frame memory 142 and then output to the input / output controller 134 at a predetermined timing. Note that the image processor unit 136B has the same configuration as the above-described image processor unit 136A, and a description thereof will be omitted.

In the present embodiment, each frame image is read twice by the line CCD scanner 14 at different resolutions. In the first reading at a relatively low resolution (hereinafter, referred to as pre-scan), even when the density of the frame image is extremely low (for example, a negative image underexposed on a negative film), the line CCD 116 is not used.
The frame image is read under the reading conditions (light amounts of light to be applied to the photographic film in the respective R, G, and B wavelength ranges, and the charge storage time of the CCD) determined so as not to cause saturation of the stored charge. The image data (pre-scan image data) obtained by the pre-scan is input from the selector 132 to the input / output controller 134, and further output to the auto setup engine 144 connected to the input / output controller 134.

The auto setup engine 144 has a C
PU 146, RAM 148 (for example, DRAM), ROM
150 (for example, a rewritable ROM) and an input / output port 152, which are connected to each other via a bus 154.

The auto setup engine 144 generates a line C based on pre-scan image data of a plurality of frame images input from the input / output controller 134.
Image processing conditions for image data (fine scan image data) obtained by the second relatively high resolution reading by the CD scanner 14 (hereinafter referred to as fine scan) are calculated, and the calculated processing conditions are stored in an image processor. Image processor 140 of unit 136
Output to In the calculation of the processing conditions of this image processing, it is determined whether or not there are a plurality of frame images of similar scenes based on the exposure amount at the time of shooting, the type of light source for shooting, and other feature amounts. Are determined, the processing conditions for the image processing on the fine scan image data of these frame images are the same or similar.

The auto setup engine 144
In this, peripheral light amount correction for correcting a peripheral light amount drop with respect to the center position of an image frame, and distortion (distortion) aberration and magnification chromatic aberration caused by lens aberration can be corrected based on lens characteristics. (See below).

The optimum processing conditions for image processing vary depending on whether the image data after image processing is used for recording an image on photographic paper in the laser printer unit 18 or output to the outside. Since the image processing unit 16 is provided with two image processor units 136A and 136B, for example, when the image data is used for recording an image on photographic paper and is output to the outside, the auto setup engine 144 is used. Calculates the optimal processing conditions for each application, and calculates the image processor units 136A and 136A.
Output to B. Thereby, the image processor unit 13
6A and 136B, the same fine scan image data is subjected to image processing under different processing conditions.

Further, the auto setup engine 144
Calculates an image recording parameter that defines a gray balance and the like when recording an image on photographic paper by the laser printer unit 18 based on the pre-scan image data of the frame image input from the input / output controller 134, The image data is output simultaneously when the image data for recording (described later) is output to the printer unit 18. Auto setup engine 1
Reference numeral 44 also calculates the image processing conditions for file image data input from the outside in the same manner as described above.

The input / output controller 134 is an I / F circuit 1
It is connected to the laser printer section 18 via 56.
When the image data after image processing is used for recording an image on photographic paper, the image data processed by the image processor 136 is transferred from the input / output controller 134 via the I / F circuit 156 to the recording image. The data is output to the laser printer unit 18 as data. The auto setup engine 144 is connected to a personal computer 158. When the image data after the image processing is output to the outside as an image file, the image data processed by the image processor unit 136 is sent from the input / output controller 134 to the auto setup engine 144.
Is output to the personal computer 158 via the.

The personal computer 158 has a CPU
160, memory 162, display 164, keyboard 166 (see also FIG. 2), mouse 177, hard disk 168, CD-R driver 170, transport controller 17
2, expansion slot 174, and image compression / decompression unit 176
And these are connected to each other via a bus 178.

The transport control section 172 controls the film carrier 68
And controls the transport of the photographic film 102 by the film carrier 68. Although not shown, the film carrier 68 has a barcode sensor for reading the barcode 112 and a magnetic head for reading information recorded on the magnetic recording layer 116. Thereby, the film type recorded on the barcode 112 and the lens type recorded on the magnetic recording layer 116 can be read.

The hard disk 168 stores film characteristic data corresponding to the film type. The characteristic of the film is a gradation characteristic (γ characteristic), which is generally represented by a curve whose density continuously changes according to the exposure amount.
Further, although details will be described later, lens data (correction coefficient) for performing peripheral light amount correction and aberration correction according to the lens type is stored in the hard disk 168 as table data in advance.

A driver (not shown) for reading / writing data from / to a storage medium such as a memory card.
A communication control device for communicating with another information processing device is connected to the personal computer 158 via the expansion slot 174. When image data for output to the outside is input from the input / output controller 134, the image data is output to the outside (the driver, the communication control device, or the like) as an image file via the expansion slot 174.

When file image data is input from outside via the expansion slot 174, the input file image data is output to the input / output controller 134 via the auto setup engine 144. In this case, the input / output controller 134 outputs the input file image data to the selector 132.

The image file input / output processing described above can also be performed on a CD-R disc via the CD-R driver 170.

The image processing section 16 outputs prescanned image data and the like to the personal computer 158,
A frame image read by the line CCD scanner 14 is displayed on the display 164, an image obtained by recording on a photographic paper is estimated and displayed on the display 164, and the operator can correct the image via the keyboard 166. When instructed, this can be reflected in the processing conditions of image processing.

(Regarding Correction Processing) The auto setup engine 144 converts the fine scan image data into
Peripheral light amount correction is performed by adding a value obtained by multiplying a value calculated from a function MASK (x, y) representing a peripheral light amount mask value by a γ characteristic value representing a gradation characteristic of a film read from the hard disk 168. x and y indicate the respective coordinate values in the sub-scanning direction and the main scanning direction at the resolution when the fine scan is performed (see FIG. 5). A function MASK () representing a peripheral light amount mask value of coordinates (x, y) (coordinates on a circle shown in FIG. 5) at a distance r from the center coordinates (x ₀ , y ₀ ) at the time of photographing shown in FIG. x, y) is expressed as log E of the subject logarithmic exposure amount: MASK (x, y) = log E (r) = a ₁ r + a ₂ r ² + a ₃ r ³ r = ｛(x−x ₀ ) ² + ( y−y ₀ ) ² ｝ ^1/2 . a ₁ , a ₂ and a ₃ are correction coefficients. Note that the center coordinates (x ₀ , y ₀ ) at the time of photographing are usually the centers of image frames unless trimming processing is performed.

As described above, MASK (x, y) is
Polynomial whose ratio of correction changes depending on the distance from the center position
(Correction formula). Correction coefficient a₁, A_Two, A_ThreeIs
Differs depending on the type of the
It is remembered. γ characteristic values are hard-decoded for each film type.
It is stored in the disk 168 in advance. Also personal
In the computer 158, the pre-scan image data
When performing trimming by performing zoom and shift processing on
Indicates the deviation of the center position during shooting,
It is necessary to correct the difference in scan resolution. this
Therefore, as shown in FIG.
The center coordinate is (x_p0, Y_p0), Fine scan image 20
The center coordinate of 1 is (x_f0, Y_f0), Trim indicated by dotted line
(X)_f, Y_f)
Neighborhood for performing peripheral light amount correction on the rescanned image 200
MASK is a function representing the light intensity mask value.₀(X_p, Y_p)When
Then, peripheral light amount correction is performed on the trimmed image 203.
MASK representing the peripheral light amount mask value for
₁(X_f, Y_f) Is MASK₁(X_f, Y_f) = MA
SK₀((X_f-X_f0) / N_x+ X_p0, (Y _f-Y_f0)
/ N_y+ Y_p0), This MASK₁(X_f,
y_f) Is multiplied by the γ characteristic value to obtain a fine scan image.
Peripheral light amount correction is performed by adding to the data. In addition,
N_xIndicates the pre-scan and fine scan sub-scanning directions.
It is the ratio of resolution. N_yIs prescan and fineski
This is the ratio of the resolution in the main scanning direction.

The above operation may be performed using an adder 202 and a multiplier 204 as shown in FIGS.

In the distortion correction, among the aberration corrections, the distortion amount D is obtained as D = b ₁ r + b ₂ r ² + b ₃ r ³ +..., And the distortion correction is performed based on the distortion amount D. b ₁ , b ₂ and b ₃ indicate correction coefficients,
r indicates the distance from the center position. As described above, the amount of distortion is represented by a polynomial in which the correction ratio changes depending on the distance from the center position. The correction coefficients b ₁ , b ₂ , and b ₃ differ depending on the lens type, and are stored in the hard disk 168 in advance. Further, the correction coefficients b ₁ , b ₂ and b ₃ need to be corrected according to the input resolution.

The chromatic aberration of magnification can also be corrected by calculating the amount of correction using a predetermined correction formula. The correction coefficient of this correction formula also differs depending on the lens type, and is stored in the hard disk 168 in advance.

By the way, when the above-described distortion correction is performed, image loss (missing of an edge portion of an image frame) occurs, and an uncertain image signal is generated at the image edge. In order to prevent this, it is necessary to slightly increase the electronic magnification for changing the size of the image so as to prevent the occurrence of image missing. This is to calculate the image missing amount from the lens type and the print magnification, calculate the ratio of the image missing amount (the ratio of the image missing amount), calculate the electronic magnification fine adjustment coefficient, and calculate the electronic magnification fine adjustment. This is performed by correcting the electronic magnification by a coefficient. The image missing amount is stored in advance in the hard disk 168 as table data for each lens type and print magnification.

As described above, the corrected image data can be recorded as an image file on an external storage medium such as a CD-R by performing a predetermined operation. Whether or not peripheral light amount correction has been performed, whether or not aberration correction has been performed, the lens type, the center coordinates of the pre-scan image, the main scanning direction resolution when performing pre-scan, fine scan, the sub-scanning direction resolution,
The following additional information such as the film type can be recorded together with the image data. Example) Peripheral light amount correction: ON Aberration correction: ON Lens type information: 01 Center coordinates at the time of shooting: (X0, Y0) Prescan resolution (main scanning direction): Y1 (dpi) Prescan resolution (subscanning direction): X1 (Dpi) Fine scan resolution (main scanning direction): Y2 (dpi) Fine scan resolution (sub-scanning direction): X2 (dpi) Film type: Z The present invention is not limited to the above information. May be included. At the time of reprinting, image processing can be automatically performed based on the additional information included in the image file by automatically determining conditions such as peripheral light amount correction and aberration correction. In addition, inexpensive digital lab systems cannot perform peripheral light amount correction or aberration correction, but if the above additional information is added to an image file and can be recorded on an external storage medium for the time being, Even between different digital lab systems, it is possible to automatically set the correction conditions based on the additional information added to the image file and perform print processing.

FIG. 6 shows an example showing the concept of printing by the digital lab system 10 based on an image file created by an inexpensive digital lab system. The output unit in the digital laboratory system 310 and the line CCD scanner 14 in the digital laboratory system 10 are not shown.

The digital lab system 310 shown in FIG.
Is basically the same as the digital lab system 10 except that the image processing unit 316 cannot perform peripheral light amount correction and aberration correction. In the digital lab system 310, first, the APS film 102 is read by the line CCD scanner 314, and the image processing unit 3
In step 16, if necessary, processing such as trimming is performed, and the image data after the image processing and the additional information are recorded as image files on the CD-R disc 318. At this time, since the digital lab system 310 cannot perform peripheral light amount correction and aberration correction, the peripheral light amount correction and aberration correction data of the additional information are both OFF.

When reprinting is performed in the digital lab system 10 based on the image file recorded on the CD-R disk 318, the image file is read by the image processing unit 16 and corresponds to the lens type included in the additional information. The correction coefficient and the γ characteristic value are read from the hard disk 168 and set in the auto setup engine 144 together with the information on the center coordinates and the resolution to perform peripheral light amount correction and aberration correction. Then, the corrected image data is printed by the output unit 28 to obtain a print image 240.

When recording is performed on a recording medium such as a CD-R disc, the recording capacity is sufficient, so that the characteristics of the photographing lens such as the above-mentioned correction coefficient and lens aberration correction formula are shown instead of the lens type. The information may be recorded as it is. In such a case, it is not necessary for the digital lab system 10 to have a database in which information indicating the characteristics of the photographing lens is recorded on the hard disk 168 for each lens, so that the recording capacity can be saved.

The function of the image processing unit 316 in the digital lab system 310 may be replaced by a personal computer for home use.
If you purchase the scanner 314 and editing software for image processing, you can create an image file at home.

Next, the operation of the present embodiment will be described.

In the digital lab system 310, the APS
The film 102 is read by the line CCD scanner 314, and the image processing unit 316 performs image processing. Also, AP
The bar code 112 provided on the S film 102 is read by a bar code sensor (not shown) to obtain lens type information. The image data after the image processing is stored in a CD-R as an image file together with additional information including a lens type and the like.
It is recorded on the disk 318.

The case of reprinting in the digital lab system 10 based on the image file recorded on the CD-R disc 318 will be described with reference to the flowchart shown in FIG.

First, the operator performs a predetermined operation using the keyboard 166 to select whether to set and process the CD-R disc 318 or the APS film 102. Further, printing conditions such as a printing magnification are input by the keyboard 166. The input key is determined (step 350), and the CD-R disc 3
If 18 is set, the CD-R is set in step 352.
The image file recorded on the disk 318 is read.
When the APS film 102 is set on the film carrier 68, the lens type is read by a bar code sensor (not shown) (step 354), pre-scan (step 356), fine scan (step 3).
58).

Next, in step 360, the parameter calculation processing shown in FIG. 8 is performed. First, it is determined in step 402 whether or not the lens type has been acquired. If the lens type has not been acquired, the process returns. If the lens type has been acquired, in step 404, the peripheral light amount correction is performed based on the additional information.
It is determined whether the answer is F or not. If the determination is negative, the process proceeds to step 408, and if the determination is affirmative, the process proceeds to step 406.
Use the hard disk 1 to set the peripheral light amount correction coefficient and film type
Read from 68. When processing the APS film 102, step 404 is not performed, and step 406 is executed as it is.

In step 408, it is determined whether the aberration correction is OFF based on the additional information. If the determination is negative, the process proceeds to step 414. If the determination is affirmative, the process proceeds to step 410. Calculate the electronic magnification fine adjustment coefficient. When processing the APS film 102, step 408 is not performed, and step 410 is executed as it is.

As described above, since it is determined whether or not the peripheral light amount correction and the aberration correction have already been performed, there is no possibility that the corrections are erroneously repeated.

FIG. 9 shows the calculation of the image missing amount and the electronic magnification fine adjustment coefficient.
The flow is performed as shown in FIG. First, step 502
Then, the image missing amounts Δx and Δy corresponding to the additional information or the lens type read from the APS film 102 and the designated print magnification are read from the hard disk 168. At step 504, the deflection rate kx in the x direction is calculated. The deflection rate kx is obtained as kx = 2Δx / XX, where XX is the number of pixels in the x direction after electronic scaling without fine adjustment. In step 506, similarly, the deflection rate ky in the y direction is calculated.

Next, at step 508, the eccentricity kx and k
If y is compared, and if kx is large, the electronic variable magnification fine adjustment coefficient Δm is calculated in step 510. Δm is XX / (XX-2
Δx). Conversely, if kx is small, step 5
At 12, an electronic variable magnification fine adjustment coefficient Δm is calculated. Δm is YY
/ (YY-2Δy). That is, Δm is set to the larger value of the shaking rate.

At step 514, x is calculated from the obtained Δm.
The electronic magnification in the direction and the y direction is corrected. X without fine tuning
If the electronic scaling factor in the directional direction is mx and the electronic scaling factor in the y direction is my, and the electronic scaling factor in the x direction after fine adjustment is mx ′ and the electronic scaling factor in the y direction is my ′, mx ′ and my ′ are respectively mx '= Mx × Δm, my' = my × Δm. Then, in step 516, the image missing amounts Δx ′ and Δy ′ corresponding to the lens type and the print magnification are read from the hard disk 168, and the process returns.

Then, in step 412, the magnification chromatic aberration correction coefficient and the distortion correction coefficient are read from the hard disk 168, and the process returns.

Then, the parameters, image data, and additional information obtained in step 362 are output to the auto setup engine 144, and the processing ends.

Next, the auto setup engine 144
Will be described with reference to the flowchart shown in FIG. First, it is determined in step 602 whether or not image data has been received. If so, in step 604 the peripheral light amount correction is performed based on the parameters (correction coefficient, film type) output from the personal computer 158 and the additional information. I do. Next, in step 606, chromatic aberration of magnification and distortion are corrected based on the correction coefficient and the additional information output from the personal computer 158. In step 608, electronic scaling processing is performed with the finely adjusted electronic scaling factor. The image data corrected in this way is output to the laser printer unit 18 in step 610. Then, the laser printer section 18 and the processor section 2
0, print processing is performed, and a print image 240
Get.

As described above, even between different digital lab systems, it is possible to automatically set the correction conditions based on the additional information added to the image file and perform the print processing.

In this embodiment, the image file is recorded on the CD-R. However, the present invention is not limited to this. The floppy disk, memory card, MO, DVD-RA
A storage medium such as M or MD may be used.

In this embodiment, the case where the lens type is recorded in advance on the photographic film has been described as an example. However, the lens data (correction coefficient) itself may be recorded on the photographic film. .

[0071]

As described above, according to the present invention,
In an inexpensive image processing device that cannot perform aberration correction or peripheral light amount correction, additional information such as a lens type is recorded on a recording medium along with image data.
At the time of reprinting, an image processing apparatus capable of performing aberration correction and peripheral light amount correction can automatically set correction conditions such as aberration correction and peripheral light amount correction based on the additional information. For this reason, there is an excellent effect that print processing can be smoothly performed between different image processing apparatuses.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a digital laboratory system according to an embodiment of the present invention.

FIG. 2 is an external view of a digital laboratory system.

FIG. 3 is a control block diagram of an image processing unit.

FIG. 4 is a plan view showing an APS-compatible film.

FIG. 5 is a diagram for explaining a correction value of peripheral light amount correction.

FIG. 6 is a diagram illustrating the concept of printing based on an image file between different laboratory systems.

FIG. 7 is a flowchart showing a control flow in the personal computer.

FIG. 8 is a flowchart illustrating a flow of a correction coefficient calculation process.

FIG. 9 is a flowchart illustrating a flow of a calculation process of an image missing amount and an electronic magnification fine adjustment coefficient.

FIG. 10 is a flowchart showing a flow of control in an auto setup engine.

FIG. 11 is a diagram for explaining a method of correcting peripheral light quantity.

FIG. 12 is a diagram illustrating another example in the case where peripheral light amount correction is performed.

FIG. 13 is a diagram illustrating another example of performing peripheral light amount correction when trimming is performed.

[Description of Reference Codes] 10, 310 Digital laboratory system 14, 314 Line CCD scanner 16, 316 Image processing unit 18 Laser printer unit 20 Processor unit 102 Photographic film 144 Auto setup engine 158 Personal computer 318 CD-R disc

Claims (3)

[Claims] 1. A method for reading photographic lens characteristic information pre-recorded on a photographic photosensitive material and an image recorded on the photographic photosensitive material, the photographic lens characteristic information and the image data together with image data obtained by the reading. Record additional information including information on whether or not correction has been performed on the recording medium, read the additional information recorded on the recording medium, and if the image data has not been corrected, An image processing method comprising: reading out correction information corresponding to the photographing lens characteristic information; and correcting the image data based on the correction information. 2. The image processing method according to claim 1, wherein the correction information is information for performing at least one of a correction corresponding to a lens aberration and a correction corresponding to a lack of peripheral light amount by the lens. . 3. The additional information further includes central coordinate information at the time of capturing the image and reading resolution information of the image, and the additional information is based on the central coordinate information at the time of capturing, the reading resolution information, and the correction information. 3. The image processing method according to claim 1, wherein the correction is performed.