JPH05347704A - Image reader - Google Patents

Abstract

PURPOSE:To simplify the reading of images by applying the shading correction to the non-image part of a pseudo panoramically photographed negative film and then reading the image part as is. CONSTITUTION:An image part A is formed by an entire frame in regard of a standard photographing negative film F1. Meanwhile an image part A is formed at the center of a single frame together with the non-image parts B and C secured at the upper and lower parts of the part A in regard of a pseudo panoramically photographed negative film F2. Both films F1 and F2 are set on an image reading device which reads the image information and processes the images. That is, the shading correction is carried out at the parts B and C of the film F2 and then the part A is read as is. Then no exposure control is required as long as the exposure conditions, for example, are known. Thus both shading and reading operations can be carried out in a single scanning operation.

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 which reads image information of a standard negative film and performs image processing, and more particularly to an image reading apparatus which reads image information of a pseudo panoramic photographing negative film and performs image processing. .

[0002]

2. Description of the Related Art In recent years, for example, pseudo-panoramic photography is performed using a standard negative film of 35 mm, and standard photography and pseudo-panoramic photography are performed using a standard negative film. When printing a pseudo panoramic shooting negative film image on which this pseudo panorama shooting was performed, or a standard negative film image on which standard shooting and pseudo panorama shooting are mixed, when printing a pseudo panorama shooting image Must be printed over the non-imaged part of the pseudo panorama negative film that has not been photographed. When printing is performed using such a pseudo panoramic shooting negative film, the image reading device reads the image information of the pseudo panoramic shooting negative film, performs image processing, and outputs it to a copying machine or the like.

[0003]

By the way, in the conventional reading of image information of a pseudo panoramic photographic negative film, shading is carried out as a preprocessing of image processing, exposure control is then carried out, and then reading is carried out. However, reading image information is complicated and troublesome.

Further, when the image information of the pseudo panoramic photographic negative film is read a plurality of times, the shading data is collected for each time, or the shading data is used for the first time after the first time and after the second time. However, if the shading is performed once for each time, the operation becomes complicated. Moreover, if it is only once, a certain quality cannot be maintained.

In view of the above point, the present invention according to claims 1 to 3 aims to provide an image reading apparatus in which the image information can be easily read from the pseudo panoramic photographing negative film.

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

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 reads an image of a pseudo-panoramic photographic negative film photographed using a standard negative film, and performs image processing for image processing. The apparatus is characterized by having a means for reading the image portion as it is after performing shading correction on the non-image portion of the pseudo panoramic photographic negative film.

According to a second aspect of the present invention, in an image reading device for reading image information of a pseudo panoramic shooting negative film shot using a standard negative film and performing image processing, when the pseudo panoramic shooting negative film is read a plurality of times. The second and subsequent times are characterized by having a means for reading using the first shading data.

According to a third aspect of the present invention, in an image reading apparatus for reading image information of a pseudo panoramic photographic negative film photographed using a standard negative film and performing image processing, a plurality of same frames of the pseudo panoramic photographic negative film are recorded. It is characterized in that it has a means for performing reading by using the shading data or the exposure control data of the first time or the shading data and the exposure control data for the second and subsequent readings.

According to a fourth aspect of the present invention, in an image reading apparatus for reading image information of a pseudo panoramic shooting negative film shot using a standard negative film and performing image processing, when the pseudo panoramic shooting 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 invention, after the shading correction is performed on the non-image portion of the pseudo panoramic photographic 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.

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

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

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

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the image reading apparatus of the present invention will be described below with reference to the drawings. 1. 1. Outline of Image Reading Apparatus FIG. 1 shows a standard photographic negative film F1 standardly photographed on a standard negative film, and FIG. 2 shows a pseudo panoramic photographic negative film F2 quasi-panoramic photographed on a standard negative film. In the standard photographic negative film F1, one frame is entirely the image part A, but in the pseudo panoramic photographic negative film F2 in FIG. 2, the image part A is formed in the center of one frame, and the non-image parts B and C are formed above and below it. ing. The standard photographic negative film F1 and the pseudo panoramic photographic negative film F2 are set in the image reading device shown in FIG. 3, and the image information is read by the image reading device and image processing is performed.

FIG. 3 is a diagram showing an example of a schematic structure 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 and a mirror unit 3 as shown in FIG.
00 and an information processing unit 400 such as a digital color copying machine and read a document image in a transmissive type.

Structure of Film Projector 200 In this film projector 200, a negative film carrier 202 supporting an original film F is inserted into the film projector main body 201 on the upper surface and the side surface of the film projector main body 201 from the vertical direction or the horizontal direction. Grooves 203 each having a size capable of being formed are provided. 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 separately prepared. Therefore, these films can be attached to the film projector main body 201.

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

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

Structure of Mirror Unit 300 In the mirror unit 300, the total reflection mirror 301 is supported by the film projector main body 201 so that the angle formed with the bottom portion 302 is 45 degrees. Also,
An opening 303 is formed in the bottom portion 302, and a Fresnel lens 304 is provided in this opening 303. The Fresnel lens 304 has a function of preventing the peripheral portion of the image from becoming dark by converting the projection light, which is reflected by the total reflection mirror 301 and diffuses into parallel light.

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

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

The shading correction unit 10 is a CPU 1
The line memory 12 is connected to the CPU 11. The line memory 12 is a line memory that stores, for each pixel, shading data of R, G, and B for one CCD line for correcting variations in the sensitivity of the CCD line sensors 1 to 3 and uneven light amount of the electro-illumination 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 an output fluctuation of the image signal in the CCD main scanning direction. Correct the white balance of R, G, and B.

The CPU 11 stores the sampling position storage RA.
An 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 that stores a position for sampling shading data and exposure control data described later, and the exposure control data storage RAM 14 is a RAM that stores 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,
Both are configured to be accessed by the CPU 11. 3. Reading Operation Next, the reading operation of the image reading apparatus will be described with reference to FIG. FIG. 6 is a flowchart showing the 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 photographic negative film F1 shown in FIG. 1 and the pseudo panoramic photographic negative film F2 as shown in FIG. In order to determine the reading mode in step S2, the mode is set by key input on the main body. Although the mode is set by key input here, the mode may be set by discriminating between standard shooting and pseudo panoramic shooting by using image processing or the like. 3-2. Standard Shooting Mode Next, when the standard shooting mode is selected in step S2,
The 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 standard photographing negative film F1 is photographed. Step S31
When it is confirmed that the base film has been set, the shading scan starts, and the position data X1 near the central portion between the end portions L1 and L2 as shown in FIG. 7 sent from the sampling position storage RAM 13 shown in FIG. Based on the sampling signal from the CPU 11,
32 shading data are sampled.

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

After scanning for shading, the standard photographing negative film F1 is replaced with the negative film carrier 202.
And the negative film carrier 202 is inserted from the insertion port of the projector desired to be read, that is, from the same direction as when the shading is performed.

In step S33, the standard photographing negative film F
1 is set, it is determined in step S34 whether or not the copy button has been pressed, and if it is confirmed that the copy button has been pressed, prescanning starts first,
In order to properly read the projection image, exposure control data for correcting various conditions of the standard photographic negative film is fetched in step S35.

Generally, a negative film has a wide latitude, and it is necessary to print a negative film from overexposure to underexposure in the same manner. Since the exposure condition at the time of photographing is actually unknown, the image on the negative film is not known. Since it is necessary to sample the density and adjust the exposure amount to the negative film, the exposure control data is fetched. For example, based on the exposure control data, change the amount of lamp light to change the amount of exposure to the negative film, and make the amount of light entering the reading element from overexposure to underexposure equal,
There is a method of printing in the same manner from overexposure to underexposure.

Further, in the sampling of the image density on the 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 photographic negative film F1, the sampling position storing RAM shown in FIG. 5 is actually used.
Sampling is started by the sampling signal from the CPU 11 based on the position data of the end portion L1 as shown in FIG. Although the exposure control data is sampled from the end portion L1 to the end portion L2 here, a part thereof may be sampled.

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

Shading is performed for the reason described in the reading of the standard photographic negative film F1. Particularly, for the pseudo panoramic photographic negative film F2, as shown in FIG. 9, between L3 and L4 or between L5 and L6. Shading is performed by using the non-image parts B and C. For example, based on position data near the central portion between L3 and L4 as shown in FIG. 9 sent from the sampling position storage RAM 13 shown in FIG. Is sampled. After the shading correction is performed on the non-image portions B and C of the pseudo panoramic shooting negative film F2, the image portion A is read as it is (step S).
6).

That is, the information processing section 40 of this image reading apparatus
Reference numeral 0 has a 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 photographic negative film F2. Until now, for example, shading and exposure control were performed by pre-scan, and then pseudo panoramic photography negative film F2 was read by main scan, that is, two scan operations were performed, but if exposure conditions are known, exposure control is performed. There is no need to perform it, and shading and reading are performed in one scan. That is, the performance of the camera has improved, the exposure control of the camera has become accurate, the film that has been shot is in the proper exposure state, and there is no need to see the exposure state, and shading and reading can be performed with one scan. Yes, you can easily read the film.

Further, the information processing section 40 of this image reading apparatus
0 has a means for reading the pseudo panoramic negative film F2 a plurality of times by using the shading data for the second and subsequent times. Until now, for example, even when reading a plurality of times, the pseudo panoramic shooting negative film F2 was read in the main scan after performing the shading and exposure control in the prescan, but the shading operation in which the reading was performed a plurality of times was started. It can be done only once and can be read easily.

Further, the information processing section 40 of this image reading apparatus
0 has a means for reading the pseudo panoramic negative film F2 a plurality of times by using the shading data for the second and subsequent times. Up to now, for example, when reading the same frame a plurality of times, the state of the pseudo panoramic shooting negative film F2 was seen each time, but since it is the same frame, the shading state and exposure state do not change,
After the second reading, the reading operation can be simplified by performing the reading operation using the first reading data.

Further, the information processing section 400 of the image reading apparatus
Has a means for collecting shading data once every plural times when reading the pseudo panoramic negative film F2 a plurality of times. In order to maintain a constant quality, the quality should be maintained with a minimum correction operation. You can As a minimum correction operation, when the pseudo panoramic shooting negative film F2 is read a plurality of times, shading correction data is sampled once every a plurality of times, and new shading correction data is provided in the memory to perform shading correction.

A flow chart of this reading is shown in FIG. In step a, the number of copies is set. Here, the number is n1. Next, in step b, the copy button is O
If it is ON, the process proceeds to the next step c. In step c, shetting data is collected, and in step d, exposure control data is collected. next,
At step e, the counter 2 for counting the number of copied sheets and the counter 1 for counting the number of copied sheets after shading are set to 0, respectively. In step f, the number of counters 1 for counting the number of copied sheets after shading is compared with a preset value n2. If the number of counters 1 = n2, go to step g to collect the shading data. Then, the counter 1 is set to 0 in step h. If the number of counters 1 is not n2 or after step h, the process proceeds to step i to read the pseudo panoramic negative film F2, the counter 1 is incremented by 1 at step j, and the counter 2 is incremented by 1 at step k. . Finally, in step l, the counter 2
Is compared with the number of sheets n1 set in step a. If it is not n1, the process proceeds to step f, and if it is n1, the copy is finished.

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

[0040]

As described above, the invention according to claim 1 is
Pseudo panorama shooting After the shading correction is performed on the non-image part of the negative film, the image part is read as it is. For example, if the exposure conditions are known, it is not necessary to control the exposure, and the shading and reading can be performed in one scan. To make reading easier.

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

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

According to the fourth aspect of the present invention, when reading the pseudo-panoramic photographic negative film a plurality of times, the shading data is sampled once every a plurality of times. Can be maintained.

[Brief description of drawings]

FIG. 1 is a view showing a standard photographing negative film which is standard photographed on a standard negative film.

FIG. 2 is a view showing a pseudo panoramic shooting negative film which is pseudo panoramic shot 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 showing 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 the acquisition of shading data of a standard photographic negative film.

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

FIG. 9 is a diagram showing capturing of shading data of a pseudo panoramic shooting negative film.

FIG. 10 is a flowchart for collecting shading data once in a plurality of times when reading a pseudo panoramic negative film.

[Explanation of symbols]

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

Claims (4)

[Claims] 1. An image reading apparatus for reading image information of a pseudo-panoramic photographic negative film photographed using a standard negative film and performing image processing, after performing shading correction in a non-image portion of the quasi-panoramic photographic negative film. An image reading apparatus having means for reading the image section as it is. 2. 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, when reading the pseudo panoramic photographing negative film a plurality of times, the second and subsequent ones are 1 An image reading apparatus having a means for reading using the shading data for the second time. 3. An image reading device for reading image information of a pseudo panoramic shooting negative film shot using a standard negative film and performing image processing, when reading the same frame of the pseudo panorama shooting negative film a plurality of times. After that, the image reading apparatus is provided with a unit for reading using the first shading data or the exposure control data or the shading data and the exposure control data. 4. An image reading device for reading image information of a pseudo panoramic photographing negative film photographed using a standard negative film and performing image processing, when reading the pseudo panoramic photographing negative film a plurality of times, once in a plurality of times. Is an image reading apparatus having means for collecting shading data.