JP3194205B2 - Image reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading image information of a standard negative film and performing image processing, and more particularly to an image reading apparatus for reading image information of a pseudo panoramic negative film and performing image processing. .

[0002]

2. Description of the Related Art In recent years, pseudo panoramic photography has been performed using a standard negative film of 35 mm, for example, and standard photography and pseudo panoramic photography have been performed using a standard negative film. When printing the image of the pseudo panorama shooting negative film in which the pseudo panorama shooting was performed, or printing the image of the standard negative film in which the standard shooting and the pseudo panorama shooting are mixed, but printing the image of the pseudo panorama shooting It is necessary to print over the non-image portion of the negative film that is not photographed in the pseudo panorama photographing negative film. When printing is performed using such a pseudo panoramic photographing negative film, image information of the pseudo panoramic photographing negative film is read by an image reading device, image processing is performed, and the image is output by a copying machine or the like.

[0003]

By the way, in reading the image information of the conventional pseudo panoramic photographing negative film, shading is performed as a pre-process of image processing, then exposure control is performed, and then reading is performed. Therefore, reading image information is complicated and troublesome.

Further, when reading image information of a negative panoramic photographing film a plurality of times, shading data is collected each time, or the shading data is collected at the beginning and the second time and thereafter, and the shading data is used. If the shading is performed once, as described above, the operation becomes complicated. In addition, if it is performed only once, a certain quality cannot be maintained.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide an image reading apparatus which can easily read image information from a pseudo panoramic photographing negative film.

Another object of the present invention is to provide an image reading apparatus capable of maintaining a constant quality with a minimum shading correction operation.

[0007]

According to an aspect of the present invention, there is provided an image reading apparatus for reading image information of a pseudo panoramic photographed negative film photographed using a standard negative film and performing image processing. The apparatus is characterized in that there is provided means for reading the image portion as it is after performing shading correction on the non-image portion of the negative film for pseudo panoramic photography.

According to a second aspect of the present invention, there is provided an image reading apparatus for reading image information of a pseudo panoramic photographing negative film photographed using a standard negative film and performing image processing, wherein the pseudo panoramic photographing negative film is read a plurality of times. It is characterized by having means for reading using shading data of the first time after the second time.

According to a third aspect of the present invention, there is provided an image reading apparatus for reading image information of a pseudo panoramic photographing negative film photographed by using a standard negative film and performing image processing, wherein a plurality of the same frames of the pseudo panoramic photographing negative film are provided. When reading twice, there is provided a means for performing reading using shading data or exposure control data or shading data and exposure control data for the first and subsequent times.

According to a fourth aspect of the present invention, there is provided an image reading apparatus for reading image information of a pseudo panoramic photographing negative film photographed using a standard negative film and performing image processing, wherein the pseudo panoramic photographing negative film is read a plurality of times. And a means for collecting shading data once in a plurality of times.

[0011]

According to the first aspect of the present invention, after the shading correction is performed on the non-image portion of the pseudo panoramic photographing negative film, the image portion is read as it is. For example, if the exposure conditions are known, it is not necessary to perform exposure control, and shading and reading are performed in one scan.

According to the second aspect of the present invention, when the pseudo panoramic photographing negative film is read a plurality of times, the second and subsequent times are read using the first shading data, and when the plurality of times are read, the reading is performed every time. The shading operation can be performed only once at the first time, and reading is simplified.

According to the third aspect of the present invention, when the same frame of the pseudo-panorama negative film is read a plurality of times, the second and subsequent readings are performed using the first shading data or the exposure control data or the shading data and the exposure control data. Do. Since the frame is the same, the shading state and the exposure state do not change, so that the second and subsequent times can be easily read by using the first data.

According to the fourth aspect of the present invention, when the pseudo panoramic image negative film is read a plurality of times, shading data is collected once in a plurality of times and the quality is maintained with a minimum correction operation in order to maintain a constant quality. Can be done.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of an image reading apparatus according to the present invention will be described with reference to the drawings. 1. Overview of Image Reading Apparatus FIG. 1 shows a standard photographing negative film F1 photographed as standard on a standard negative film, and FIG. 2 shows a pseudo panoramic photographing negative film F2 photographed as a pseudo panorama on a standard negative film. In the standard photographing negative film F1, one frame is entirely composed of the image portion A. However, in the pseudo panorama photographing negative film F2 of FIG. ing. Such a standard photographing negative film F1 and the pseudo panoramic photographing negative film F2 are set in the image reading apparatus shown in FIG. 3, and image information is read and image processing is performed by the image reading apparatus.

FIG. 3 is a view showing a schematic configuration example of an image reading apparatus embodying the present invention, and FIG. 4 is a perspective view of a negative film carrier.

This image reading apparatus includes a film projector 200, a mirror unit 3 as shown in FIG.
00 and an information processing unit 400 such as a digital color copier, and reads a document image in a transmission type.

In the film projector 200, a negative film carrier 202 supporting a document film F is inserted into the film projector main body 201 from the vertical or horizontal direction on the upper and side surfaces of the film projector main body 201. Each of the grooves 203 is provided with a size that can be used. As shown in FIG. 4, the negative film carrier 202 has a pair of frames 202a and 202b that can be opened and closed, and the original film F can be sandwiched between the frames 202a and 202b. . The negative film carrier 202 is a 35 mm negative film carrier, and a reversal film carrier (not shown) is prepared separately. Therefore, these films can be mounted on the film projector body 201.

In the film projector body 201,
A light source lamp including a reflector 210 and a halogen lamp 211 is disposed coaxially with the projection lens 212. In the vicinity of the halogen lamp 211, a cooling fan 213 for cooling the halogen lamp 211 is provided. Further, on the left side of the halogen lamp 211, a condenser lens 214 for converging the light from the halogen lamp 211, a convex lens 215, and a heat ray absorption filter 216 for cutting off light of a predetermined wavelength are coaxial with the projection lens 212, respectively. Is placed on top.

On the left side of the heat ray absorption filter 216, a film correction filter 217 for correcting the spectral characteristic of the film and the spectral characteristic of the lamp, and a diffusion plate 218 so that the filament of the light source lamp is not visible.
The power supply of the film projector 200 is provided separately from the power supply of the base machine 500.

Configuration of Mirror Unit 300 In the mirror unit 300, the total reflection mirror 301 is supported by the film projector body 201 so that the angle formed between the mirror 301 and the bottom 302 is 45 degrees. Also,
An opening 303 is formed in the bottom 302, and a Fresnel lens 304 is provided in the opening 303. The Fresnel lens 304 has a function of preventing the peripheral portion of the image from being darkened by changing the projection light reflected by the total reflection mirror 301 to be diffused into parallel light.

The mirror unit 300 is housed in the film projector main body 201 when color copying by the film projector 200 is not performed. Then, the mirror unit 300 is placed at a predetermined place on the platen glass 501 of the base machine 500 when used.

Configuration of Information Processing Unit 400 The information processing unit 400 includes a condenser lens 410, a CCD 420 of a photoelectric conversion element, an image reading unit 430, and an image processing unit 44.
0, and the information processing section 400 is configured as shown in FIG. 2. Overview of Image Signal Processing FIG. 5 shows an example of a configuration of an image signal processing circuit of a color image reading apparatus. Reference numerals 1 to 3 denote CCD line sensors for image input, each of which has a plurality of photoelectric conversion elements arranged linearly.
It is a CD array. The image signals input from the CCD line sensors 1 to 3 are amplified by amplifiers 4 to 6 provided for each color, and are further amplified by A / D converters 7 to 9 provided for each color.
The digital signals are converted into digital signals of G and B, respectively, and become time-series signals of one line for each color. The time-series signals are input to the shading correction unit 10.

The shading correction unit 10 is a CPU 1
The CPU 11 is connected to a line memory 12. The line memory 12 is a line memory that stores, for each pixel, R, G, and B shading data for one CCD line for correcting variations in the sensitivity of the CCD line sensors 1 to 3 and unevenness in the amount of light from the light source. It is composed of a semiconductor random access memory RAM. Further, the shading correction unit 10 performs an operation between the image signal and the shading data read from the line memory 12 based on a control signal from the CPU 11 to correct output fluctuation of the image signal in the CCD main scanning direction and to perform correction. The white balance of R, G, and B is corrected.

The CPU 11 stores a sampling position storage RA.
M13, an exposure control data storage RAM 14, and a shading data save RAM 15 are connected. The sampling position storage RAM 13 is a RAM for storing a position for sampling shading data and exposure control data described later, and an exposure control data storage RAM 14 is a RAM for storing exposure control data for determining a film exposure state described later. The shading data saving RAM 15 is a saving RAM for temporarily saving the shading data stored in the line memory 12.
Each is configured to be accessed by the CPU 11. 3. Reading Operation Next, a reading operation of the image reading apparatus will be described with reference to FIG. FIG. 6 is a flowchart showing a control procedure. 3-1. Setting of pseudo panorama shooting mode and standard shooting mode First, in step S1, the operation of the copy key is determined. When the copy key is ON, there are the standard photographing negative film F1 shown in FIG. 1 and the pseudo panoramic photographing negative film F2 as shown in FIG. In order to determine the reading mode in step S2, the mode is set by key input of the main body. Here, the mode is set by key input. However, the mode may be set by discriminating between standard shooting and pseudo panoramic shooting using image processing or the like. 3-2. Standard shooting mode Next, when the standard shooting mode is selected in step S2,
An unexposed frame of the film base is set on the negative film carrier 202 shown in FIG. 2, and the negative film carrier 202 is inserted from the insertion opening of the projector in the same direction as the direction in which the standard negative film F1 is photographed. Step S31
When it is confirmed that the base film has been set, the scanning of the shading starts, and the position data X1 near the center between the ends L1 and L2 shown in FIG. 7 sent from the sampling position storage RAM 13 shown in FIG. And the sampling signal from the CPU 11 based on the
32 shading data are sampled.

Normally, the shading data corrects the illumination light amount distribution and the sensitivity variation of individual elements of the line sensor (photoelectric conversion element array). In addition to this, in shading of negative film, there is a method of correcting orange masking of negative film, shading using unexposed part of film to effectively use dynamic range, and removing color data for orange mask. Have been. Further, here, a plurality of lines are sampled in order to improve the accuracy of data, averaged using the CPU 11 to obtain final shading data, and stored in the line memory 12 in FIG.

After the scanning for shading is completed, the standard photographing negative film F1 is transferred to the negative film carrier 202.
, And insert the negative film carrier 202 from the insertion opening to be read by the projector, that is, from the same direction as when the negative film carrier 202 was inserted by shading.

In step S33, the standard photographing negative film F
After confirming that 1 has been set, it is determined in step S34 whether or not the copy button has been pressed. When it is confirmed that the copy button has been pressed, first, pre-scanning starts,
In order to properly read the projection image, exposure control data for correcting various conditions of the standard negative film is taken in step S35.

Normally, a negative film has a wide latitude, and it is necessary to print the negative film from overexposed to underexposed in the same manner. Since the exposure conditions at the time of photographing are actually unknown, the image on the negative film is not known. Since it is necessary to sample the density and adjust the amount of exposure to the negative film, exposure control data is taken. For example, based on the exposure control data, change the amount of light to the negative film by changing the amount of lamp, and equalize the amount of light entering the reading element from overexposure to underexposure,
There is a method of printing in the same manner from overexposure to underexposure.

In the sampling of the image density on a negative film, the accuracy of exposure control, that is, the negative-positive conversion can be improved by reading the widest possible range.

Therefore, in the case of the standard photographing negative film F1, the sampling position storing RAM shown in FIG.
Sampling is started by a sampling signal from the CPU 11 based on the position data of the end L1 as shown in FIG. Here, the exposure control data is sampled from the end L1 to the end L2, but may be a part of the exposure control data.

Finally, using the above method, step S3
At step 6, the image portion A of the standard negative film F1 is read. 3-3. Pseudo panoramic photography mode When the pseudo panoramic photography mode is selected in step S2, the pseudo panoramic photography negative film F2 shown in FIG.
Is set on the negative film carrier 202, and the negative film carrier 202 is inserted through the horizontal insertion opening of the projector. In step S3, a pseudo panorama shooting negative film F
After confirming that 2 has been set, it is determined in step S4 whether or not the copy button has been pressed. When it is confirmed that the copy button has been pressed, the main scan starts, and in step S5 shading data is captured.

The shading is performed for the reason described in the reading of the standard negative film F1. In particular, with respect to the pseudo panoramic negative film F2, between the L3 and L4 or between the L5 and L6 as shown in FIG. Is performed by using the non-image portions B and C of FIG. For example, the pre-scan starts, and the shading data of step S5 is obtained from the sampling signal from the CPU 11 based on the position data near the center between L3 and L4 as shown in FIG. 9 sent from the sampling position storage RAM 13 shown in FIG. Is sampled. After performing shading correction on the non-image portions B and C of the pseudo panorama photographing negative film F2, the image portion A is read as it is (step S).
6).

That is, the information processing section 40 of the image reading apparatus
No. 0 has means for reading the image portion A as it is after performing shading correction on the non-image portions B and C of the pseudo panoramic photographing negative film F2. Until now, shading and exposure control were performed by, for example, pre-scanning, and then the pseudo panoramic photographing negative film F2 was read by main scanning. That is, the scanning operation was performed twice. However, if the exposure conditions were known, the exposure control was performed. There is no need to perform this operation, and shading and reading are performed in one scan. In other words, the performance of the camera has been improved, the exposure control of the camera has become more accurate, the photographed film is in the proper exposure state, and there is no need to check the exposure state, and shading and reading can be performed in one scan. And easy to read the film.

Further, the information processing section 40 of the image reading apparatus
No. 0 has means for reading using the first shading data for the second and subsequent times when reading the pseudo panoramic photographing negative film F2 a plurality of times. Until now, for example, when reading a plurality of times, the shading and exposure control were performed in the pre-scan, and then the pseudo panoramic photographing negative film F2 was read in the main scan. Only once, and reading can be simplified.

The information processing unit 40 of the image reading apparatus
No. 0 has means for reading using the first shading data for the second and subsequent times when reading the pseudo panoramic photographing negative film F2 a plurality of times. Until now, for example, when reading the same frame a plurality of times, the state of the pseudo panorama shooting negative film F2 was seen each time, but since the same frame, the shading state and the exposure state do not change.
From the second time on, the reading operation can be simplified by performing the reading operation using the first data.

Further, the information processing section 400 of the image reading apparatus
Has a means for collecting shading data at least once every plural times when reading the pseudo-panoramic negative film F2 a plurality of times. To maintain a constant quality, maintain the quality with a minimum correction operation. Can be. As a minimum correction operation, when reading the pseudo panorama photographing negative film F2 a plurality of times, shading correction data is collected once in a plurality of times and new shading correction data is provided in the memory to perform shading correction.

FIG. 10 shows a flowchart of this reading. In step a, the number of copies is set. Here, n1 sheets are assumed. Next, in step b, the copy button is
It is determined whether N has been performed, and if it is ON, the process proceeds to the next step c. In step c, the shading data is collected, and in step d, the exposure control data is collected. next,
In step e, a counter 2 for counting how many copies have been made and a counter 1 for counting the number of copies made after the shading has been performed are set to 0. In step f, the number of counters 1 counting the number of sheets copied after shading is compared with a preset value n2. If the number of counters 1 is n2, the flow proceeds to step g to collect shading data. Then, the counter 1 is set to 0 in step h. If the number of counters 1 is not equal to n2 or after step h, the process proceeds to step i to read the pseudo panorama negative film F2, increments the counter 1 by 1 at step j, and increments the counter 2 by 1 at step k. . Finally, in step l, the counter 2
Is compared with the number n1 set in step a. If it is not n1, the process proceeds to step f, and if it is n1, the copy is terminated.

In this way, shading correction is performed once every time copying is performed n2 times. The frequency n2 at which the shading correction is performed can be set arbitrarily.

[0040]

As described above, the first aspect of the present invention provides
After performing shading correction on the non-image portion of the pseudo-panoramic negative film, the image portion is read as it is. For example, if the exposure conditions are known, there is no need to perform exposure control, and shading and reading are performed in one scan. , The reading is simplified.

According to the second aspect of the present invention, when the pseudo panoramic image negative film is read a plurality of times, the second and subsequent readings are performed using the first shading data. The shading operation can be performed only once at the beginning, and the reading is simplified.

According to a third aspect of the present invention, when the same frame of a pseudo panoramic photographing negative film is read a plurality of times, the second and subsequent times are read using the first shading data or the exposure control data or the shading data and the exposure control data. It is supposed to be done and it is the same frame,
Since the shading state and the exposure state do not change, the second and subsequent times can be easily read by using the first data.

According to the fourth aspect of the present invention, when the pseudo panoramic image negative film is read a plurality of times, shading data is collected once in a plurality of times. Can be maintained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a standard photographing negative film photographed as a standard on a standard negative film.

FIG. 2 is a diagram showing a pseudo panorama photographing negative film obtained by pseudo panorama photographing on a standard negative film;

FIG. 3 is a diagram illustrating a schematic configuration example of an image reading apparatus.

FIG. 4 is a perspective view of a negative film carrier.

FIG. 5 is a diagram illustrating an example of a configuration of an image signal processing circuit of the color image reading apparatus.

FIG. 6 is a flowchart showing a control procedure.

FIG. 7 is a diagram showing capture of shading data of a standard negative film.

FIG. 8 is a diagram showing capture of exposure control data of a standard negative film.

FIG. 9 is a diagram showing the capture of shading data of a negative film for pseudo panoramic photography.

FIG. 10 is a flowchart of a process of collecting shading data once in a plurality of times when a pseudo panoramic image negative film is read a plurality of times.

[Explanation of symbols]

 F1 Standard shooting negative film F2 Pseudo panoramic shooting negative film A Image section B, C Non-image section 400 Information processing section 410 Condenser lens 420 CCD 430 Image reading section 440 Image processing section

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 1/401 G06T 1/00 460

Claims (4)

(57) [Claims] 1. An image reading apparatus for reading image information of a pseudo panorama photographing negative film photographed using a standard negative film and performing image processing, after performing shading correction in a non-image portion of the pseudo panorama photographing negative film. An image reading apparatus comprising means for reading an image portion as it is. 2. An image reading apparatus which reads image information of a pseudo panoramic photographing negative film photographed by using a standard negative film and performs image processing, when reading said pseudo panoramic photographing negative film a plurality of times, the second and subsequent times An image reading apparatus, comprising: means for reading using shading data of a second time. 3. An image reading apparatus for reading image information of a pseudo-panoramic photographing negative film photographed by using a standard negative film and performing image processing, when reading the same frame of said pseudo panoramic photographing negative film a plurality of times. An image reading apparatus comprising means for performing reading using shading data or exposure control data or shading data and exposure control data for the first time thereafter. 4. An image reading apparatus for reading image information of a pseudo-panoramic photographing negative film photographed by using a standard negative film and performing image processing, wherein once the pseudo-panoramic photographing negative film is read a plurality of times, it is performed once every plural times. An image reading apparatus comprising means for collecting shading data.