JPH03135284A - Multi-color camera device - Google Patents

Abstract

PURPOSE:To obtain a correct multi-color image by taking in the distortion or the shading of an image tube in a storage means under a state that a multi- color filter is set at an input surface and sorting image pickup data by position information stored in the storage means. CONSTITUTION:Since a frame memory 97 is given a frame signal from a CCD camera 51, and simultaneously, it is given the data of two bits to distinguish R, G, B from an encoder 98, the position information related to the positional distortion, etc., of the image of a fine ares in a fluorescent screen 3 is stored in it. The obtained position information of R, G, B in the frame memory 97 corresponds perfectly to the image of an RGB filter 2 formed on the fluorescent screen 3, i.e., the position of the image of the fine R, G, B areas 2R, 2G, 2B. Then, a video signal from the CCD camera 51 is sorted by using this position information of the frame memory 97. Thus, the correct color output of R, G, B can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multicolor camera device such as an RGB color camera.

[Conventional technology]

As a method of realizing a single tube color camera device using an image tube such as an image intensifier (II) tube, it is possible to use a night vision type, for example, an RGB color filter. First, R (red), G (green), B (blue)
Two RGB color filters are prepared in which dot-shaped fine areas that transmit each color of light are uniformly dispersed on the film.

Then, one RGB color filter is attached to the input surface and output surface of the image tube. At this time, a color image of the subject can be formed on the output surface by aligning the filters on the output surface while inputting R, G, and B light into an image tube having an RGB color filter pasted on the input surface.

[Problem to be solved by the invention]

However, each image tube has its own unique distortion, so the position on the input surface does not correspond perfectly to the position on the output surface. For this reason, the above method has the disadvantage that accurate color images cannot be obtained. In addition, uneven light called shading may occur in the image tube.
Additionally, white or black spots sometimes appeared on the output surface.

The present invention aims to solve the above-mentioned drawbacks.

[Means to solve the problem]

The multicolor camera device according to the present invention includes a multicolor filter in which two or more types of fine input areas that transmit two or more different colors of light (for example, R, G, and B light) are substantially uniformly distributed. An image tube set on the input surface by a method such as pasting, and an imaging means such as a CCD camera that captures the image appearing on the output surface of the image tube and outputs imaged data;
Positional information indicating the positional distortion of the image of the fine input area that appears on the output surface when light of two or more colors is incident on the image tube separately is stored in advance for each incident of light of two or more colors. The present invention is characterized by comprising a storage means such as a frame memory, and a classification means for classifying and outputting image data into two or more colors of light based on position information.

Further, the storage means further stores brightness information of the image appearing on the output surface of the image tube, and the classification means classifies the imaging data into two or more types of colored light based on the position information, and also classifies the imaged data into two or more types of light based on the brightness information. A feature may be that the brightness is corrected and output.

[Effect]

According to the present invention, distortion and shading of the image tube are captured in the storage means with a multicolor filter set on the input surface. Therefore, an accurate multicolor image can be obtained by classifying the imaging data obtained when imaging a subject using the position information stored in the storage means, and further preferably correcting it using brightness information.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the configuration of a device for creating a frame memory (storage means) used in the multicolor camera device of the first embodiment,
FIG. 2 shows the configuration of a multicolor camera device using this frame memory. Further, FIG. 3 shows the configuration of a device for creating a frame memory used in the multicolor camera device of the second embodiment, and FIG. 4 shows the configuration of a multicolor camera device using this recorded frame memory. In order to facilitate understanding of the multicolor camera device according to the present invention, the basic concept of the present invention will be explained with reference to FIG. 5 before describing these embodiments.

First, an image tube 1 such as a II tube is prepared, and an RGB filter 2 is attached to the outer surface of the input surface 11. This R
The GB filter 2 includes a fine R region 2R that transmits R component light, a fine G region 2° that transmits G component light, and B.
Fine areas 2B that transmit component light are uniformly distributed and formed. In addition, as shown in FIG. 6, R,
In order to properly separate the G and B colors, each area is 2.2 mm.

G 2B may be surrounded by a black stripe 21.

A fluorescent surface 3 is coated on the inner surface of the output surface 12 of the image tube 1, and a photocathode, an electron lens, a microchannel plate, etc. (all not shown) are arranged inside the image tube 1. There is.

In the present invention, when creating a storage means such as a frame memory, R and G are stored in such an image tube 1.

B light is input separately. Then, images formed on the fluorescent surface 3 are recorded for each of R, G, and B. That is, R, G,
When B light is separately incident on the image tube 1 through the RGB filter 2, dot-shaped fluorescent light is generated on the fluorescent surface 3 at positions corresponding to the R region 2, the G region 2°, and the B region 2. occur separately (Fig. 5(c)
).

Here, each of the RSG and B fluorescent regions on the fluorescent surface 3 has a different positional distortion for each image tube due to the characteristics, quality, and performance of the image tube. Therefore, the position of the minute area where this fluorescence occurs is captured as position information (distortion information) for each R, G, and B irradiation using a COD camera (as shown in Figure 5(d)) and recorded in the frame memory. Then, a storage means for the image tube 1 that is perfectly matched with the RGB filter 2 is obtained. Furthermore, when light enters the image tube 1 through the RGB filter 2, if the brightness information of the fluorescent image formed on the fluorescent surface 3 is recorded in the frame memory, it is possible to eliminate shading, white spots, etc. A color camera device is obtained in which color can be removed.

Next, a specific first embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 shows an embodiment of a method for creating a frame memory in which position information is recorded. First, input surface 1 of image tube 1
1, an RGB filter 2 as shown in FIG. 6, for example, is attached. Next, a lamp 41 is placed on the input surface 11 side of the image tube 1.
A light source consisting of a light source filter 42 and a light source filter 42 are set, and an imaging system consisting of a CCD camera 51 and a relay lens 52 is set on the output surface 12 side of the image tube 1.

In this state, the light source filter 42 is set to one of R, G, and B colors, and the fluorescent surface 3 is imaged with the CCD camera 51. Then, for example, when the light source filter 42 is set to R, only a dot-shaped minute area corresponding to the R area 2R of the RGB filter 2 will illuminate on the fluorescent surface 3, so the CCD camera 51 will only see this area. is captured, and a video signal and frame signal are output. This imaging is repeated for each color (R, G, B), and therefore the CCD camera 51 outputs a video signal and a frame signal for each color.

The above video signal is binarized by a binarization circuit 94 and input to a switch 95. The terminal of the switch 95 is connected to the R terminal in synchronization with the light source filter 42 switching between R, G, and B.
, G, and B terminals. As a result, each element 98R, 298G, 98B of the encoder 98 is selected and binarized R, G.

The video signal for each B is encoded by an encoder element 98R198G,
It is input every 98B. Here, encoder element 98
R is "001" when the input is "02" and "001" when the human power is "1".
The encoder element 98G outputs "00" when the input is "0" and "01" when the input is "1", and the encoder element 98B outputs "00" when the input is "0" and outputs "01" when the input is "0". The configuration is such that when the value is 1, "11" is output.

Then, the frame memory 97 is given a frame signal from the CCD camera 51 and 2-bit data for distinguishing R, G, and B from the encoder 98, so that the position of the image of the minute area on the fluorescent surface 3 can be determined. Position information regarding physical distortion, etc. will be stored.

FIG. 2 is an explanatory diagram of an embodiment in which a single-tube color camera is constructed using the recorded frame memory 97 created by the system shown in FIG. The position information of RlG and B in the frame memory 97 obtained as described above is an image of the RGB filter 2 formed by the fluorescent surface 3, that is, an image of the fine R, G, and B areas 2, 2.2B. It corresponds perfectly to the position of 2G. Therefore, by classifying the video signal from the CCD camera 51 using the position information of the frame memory 97, accurate R, G, and B color output can be obtained. That is, the objective lens 81 is placed in front of the image tube 1.
and place the image of the subject 82 on the input surface 11 of the image tube 1.
to form. Here, since the RGB filter 2 as shown in FIG. 6 is set in front of the input surface 11, the input surface 11
An optical image of the subject 82 is formed from a large number of R, G, and B dots (fine areas). Since a photocathode (not shown) is formed on the inner surface of the input surface 11, photoelectrons are emitted in response to an optical image of the subject 82. These photoelectrons are multiplied by an MCP or the like to form an electronic image on the output surface 12.

A fluorescent surface 3 is formed at a position where an electronic image corresponding to the optical image on the input surface 11 is formed, and therefore a fluorescent image of the subject 82 is generated here. This fluorescent image is captured by a CCD camera 51 and output as a video signal and a frame signal, and the frame signal is provided to a recorded frame memory 97. Therefore, a 2-bit signal indicating whether the pixel being read and scanned by the CCD camera 51 corresponds to RlG or B is sequentially output from the recorded frame memory 97. The 2-bit output from this frame memory 97 (
R-"10", G-"Ofo 9 m"11#) are decoded by the decoder 83, and when it is R, the output of 1" is sent to the gate circuit 84R, and when it is G, the output of 1m is sent to the gate circuit 84.
4G and B, an output of "1" is input to the gate circuit 84B, respectively. Therefore, the video signal from the CCD camera 51 is R, G in the gate circuit 84R, G, B.

It is classified and output for each component of B.

Next, an embodiment will be described in which not only R, G, and B classification but also brightness and darkness correction can be performed.

FIG. 3 shows the configuration of an apparatus for creating the frame memory 97 in this case. The video signal output from the CCD camera 51 is transmitted to the R area 2 and G area on the fluorescent surface 3.
It includes information (position information) regarding the positional distortion of the image in area 2° and B area 2B, and brightness information regarding shading, black and white scratches, etc., and this is sent to the gate circuit 93 and the binarization circuit 94. is input. The output signal of the binarization circuit 94 indicates the position of the minute area on the fluorescent surface 3 for each of R, G, and B, and is inputted to the gate circuit 93 and the switch 95. The video signal is waveform-shaped by a gate circuit 93, and the A/D
The converter 96 converts the signal into a digital signal having brightness information such as shooting, and inputs it to the upper six bits (12 to 7) of the frame memory 97. On the other hand, the connection terminal of the switch 95 is switched in synchronization with the switching of R, G, and B of the light source filter 42. Therefore, the output of the binarization circuit 94 is outputted by the encoder 98, for example, R-'1.
0'G-'01'B-'11'' and input to the lower two bits l011 of the frame memory 97.

Therefore, the frame memory 97 stores R on the fluorescent surface 3.
, G, and B, and gradation flaw information (brightness information) at each position on the fluorescent surface 3 are stored.

FIG. 4 is an explanatory diagram of an embodiment in which a single-tube color camera is constructed using the recorded frame memory 97 created by the system shown in FIG. The R, G, and B position information in the recorded frame memory 97 obtained as described above is the image of the RGB filter 2 formed by the fluorescent surface 3, that is, the fine RlG, B areas 2, 2.2B. Positional distortion of the image J? G, etc., and the brightness information completely corresponds to shading, black scratches, white scratches, etc. on the fluorescent surface 3.

Therefore, by classifying and correcting the video signal from the CCD camera 51 using the position information and brightness information of the frame memory 97, accurate color output of R, G, and B can be obtained. That is, an objective lens 81 is disposed in front of the image tube 1, and an image of a subject 82 is formed on the input surface 11 of the image tube 1. Here, since an RGB filter 2 as shown in FIG. 6 is set in front of the input surface 11, an optical image of a subject 82 consisting of a large number of R, G, and B dots (fine regions) is displayed on the input surface 11. is formed.

An electronic image corresponding to this optical image is formed on the output surface 12 of the image tube 1 on which the fluorescent surface 3 is formed, and the fluorescent image here is captured by the CCD camera 51 and output as a video signal and a frame signal. Ru. The frame signal is given to a frame memory 97 in which position information and brightness information have been recorded in advance.

Therefore, the pixel being read out and scanned by the CCD camera 51 is R
, G, or B, a 2-bit signal (
0, 0,) are sequentially output from the frame memo 97, as well as a 6-bit signal (0 to 07) indicating gradation and scratches.
are output sequentially. Output regarding 2-bit position information from this frame memory 97 (R-10''G-'
01", B "11") are decoded by the decoder 83, and when it is R, the output of "1" is sent to the gate circuit 84R, when it is G, the output of "1' is sent to the gate circuit 84G, and when it is B, the output of "1" is sent to the gate circuit 84G.
1'' outputs are respectively input to the gate circuits 84B.

On the other hand, the 6-bit bright information output from the frame memory 97 is input to the divider 98, and the signal obtained by digitally converting the video signal from the CCD camera 51 by the A/D converter 91 is also input to the divider 98. has been done. Therefore, the divider 98 divides the output of the A/D converter 91 by the output of the frame memory 97 to
The video signal obtained by imaging 2 is corrected using brightness information. The output of the divider 98, which has been corrected for brightness, that is, shading, white scratches, and black scratches, is sent to gate circuits 84R and 84G.
, B. Therefore, the video signal from the CCD camera 51 is classified into R, G, and B by gate circuits 84R-B, corrected, and output.

Various modifications are possible to the present invention.

For example, by incorporating the circuit in Figure 1 and the circuit in Figure 2, or the circuit in Figure 3 and the circuit in Figure 4 into an integrated camera device,
A selection switch may be provided that selectively causes both circuits to function. In this way, when the hardware configuration is completed using an unrecorded frame memory, the selection switch described above can be switched to the frame memory creation circuit (the circuit shown in FIG. 1 or 3), and the selection switch shown in FIG. After performing the processing shown in FIG. 3 and storing position information, etc., the selection switch is returned to the camera circuit (the circuit shown in FIG. 2 or 4), and the device can be used as a color camera device. In this case, even if a malfunction occurs with the image tube such as a failure, or if it becomes necessary to use an image with a higher electron multiplication factor, the image tube can be replaced with a new image tube and the contents of the frame memory 97 can be changed. By rewriting the , it can be used again as a new color camera device.

〔Effect of the invention〕

As described in detail above, in the present invention, distortion and shading of the image tube are captured in the storage means with a multicolor filter set on the input surface. Therefore, by classifying the imaging data obtained when imaging a subject using the position information stored in the storage means, and preferably correcting it using brightness information, an accurate multicolor image can be obtained. A color camera device can be realized.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the creation of a recorded frame memory according to the first embodiment of the present invention, FIG. 2 is a diagram for explaining the configuration of a multicolor camera device according to the first embodiment of the present invention, and FIG. The figure is a diagram for explaining the creation of a recorded frame memory according to the second embodiment, FIG. 4 is a diagram for explaining the configuration of the multicolor camera device according to the first embodiment of the present invention, and FIG. An explanatory diagram of the basic concept, FIG. 6 is an explanatory diagram of an example of an RGB filter. DESCRIPTION OF SYMBOLS 1... Image tube, 11... Input surface, 12... Output surface, 2... RGB filter, 3... Fluorescent surface, 42
... light source filter, 51 ... CCD camera, 81.
... Objective lens, 82 ... Subject, 83 ... Decoder, 84 ... Gate circuit, 93 ... Gate circuit, 9
4... Binarization circuit, 95... Switch, 96...
A/D converter, 97...Frame memory, 98.
...Encoder. Figure 1 of the 4-tei composition of the 8th furehame of the 1st coming day

Claims (1)

[Scope of Claims] 1. An image tube in which a multicolor filter in which two or more types of fine input areas that transmit two or more different colors of light are substantially uniformly distributed is set on an input surface; an imaging means for capturing an image appearing on an output surface of an image tube and outputting imaged data; and an image capturing means for capturing an image appearing on an output surface of an image tube and outputting image data; storage means for storing position information in advance for each incident of the two or more colors of light; and a classification means for classifying and outputting the imaging data for each of the two or more colors of light based on the position information. A multicolor camera device comprising: 2. In addition to the position information, the storage means further stores in advance brightness information of an image appearing on the output surface of the image tube, and the classification means sorts the imaging data into the two or more types based on the position information. 2. The multicolor camera device according to claim 1, wherein the multicolor camera device classifies each color of light and outputs after correcting brightness based on the brightness information.