JPH03219788A - Color image pickup device - Google Patents

Abstract

PURPOSE:To obtain a picture with less color slurring by selecting a mixture ratio of picture signals corresponding to a moving detection signal corresponding to the movement of an object. CONSTITUTION:A lighting light from a lighting device 4 is inputted to a television camera 5, distributed into a desired rate at an optical image distributer 8 and inputted to a face sequential television camera controller 17 and a simultaneous television camera controller 18 and the result is outputted as a picture signal. A picture synthesizer 19 receives the result of a moving detector 21 and when the movement of the film 3 is large, the system synthesizes the picture obtained by the simultaneous system with emphasis in comparison with the picture obtained by the face sequential system and when the movement of the film 3 is small, the system synthesizes the picture with less emphasis. As a result, the picture without color slurring is displayed on the display screen of a television monitor 7 when a pickup object is moving.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color imaging device that performs color imaging using both a field-sequential type and a simultaneous type imaging head.

[Prior art] In recent years, color IS is performed by rotating a color filter disk in front of a color imaging device and a monochrome picture tube or a monochrome image sensor, and in synchronization with this color disk, separation is performed in front of the observer's eyes. There was a system that rotated a color disk and observed color images. After that, a color mosaic filter is attached to the front of the image pickup tube or image sensor to capture color images.
So-called simultaneous imaging devices, which separate colors using dichroic mirrors and use multiple image pickup tubes or g! elements, have been put into practical use and are becoming popular.

On the other hand, in the field of endoscopes, for example, as disclosed in Japanese Patent Application Laid-Open No. 60-73613, illumination light is applied in color sequence, a color surface image is formed by an image sensor, and an image memory is used to generate an image of each color. A system that simultaneously displays and observes images has been put into practical use.

[Problems to be Solved by the Invention] Color-sequential positive imaging devices have the disadvantage that when the subject and the imaging device are moving relative to each other, a so-called color blurring phenomenon occurs, making the image difficult to see.

On the other hand, among simultaneous imaging devices, single-tube or single-chip color imaging devices, in which a color chip is pasted in front of the imaging tube or element, have the disadvantage that they do not have sufficient resolution because colors are determined by multiple pixels. was there. In addition, with three-root or three-tube imaging devices that use dichroic mirrors, it is difficult to align each element or imaging tube, and high-resolution models require three expensive imaging elements or three imaging tubes, resulting in a high price. There were some drawbacks.

Furthermore, color sequential imaging devices used in the field of endoscopy have the disadvantage that when the subject or imaging device is moving, so-called color blurring occurs, making it difficult to see the observed image and tiring the VA inspection. there were.

The present invention has been made in view of the above points, and
It is an object of the present invention to provide a color source image device that can obtain an image with less color shift (color blur) when the object to be imaged is moving, and that can obtain a high-resolution image when there is less #J color shift. shall be.

Means and operation for solving problem C] Motion detecting means for detecting motion corresponding to the motion of the subject for each frame-sequential imaging device, for each simultaneous two-imaging device, and motion detecting means for detecting motion corresponding to the movement of the subject, By providing a mixing means that changes the mixing ratio of the output of the Equation 16 Jt device and the output of the simultaneous R@ device, it is possible to reduce the output of the simultaneous imaging device when the movement is large. When there is little movement in the negative direction, the output ratio r -1 of the frame-sequential imaging device is increased to obtain a high-resolution image.

[Example] Hereinafter, the present invention will be specifically explained with reference to the drawings.

Figures 1 to 3 relate to the first embodiment of the present invention.
2 and 2 are block diagrams of the color imaging device of the first embodiment,
FIG. 3 is an explanatory diagram showing a film placed on a film stand.

As shown in FIG. 2, the color photographing apparatus 1 of the first embodiment includes an illumination device M4 that illuminates a film 3 placed on a film stand 2, and a television camera 5 that captures 1i15 images of the illuminated film 3. , a camera control section 6 that performs signal processing for the television camera 5, and a television monitor 7 that displays standard video signals output from the camera control section 6 in color.

The film 3 to be imaged is set in such a manner that it can be moved in any direction vertically or horizontally on the film table 2 as indicated by the arrow J in FIG. The illumination device 4 illuminates the film 3 through the opening or transparent portion of the film stand 2, and the transmitted light of the film 3 enters the television camera 5 side disposed on the opposite side from the illumination device @4.

As shown in FIG. 1, an optical image distribution device 8 for distributing the light transmitted through the film 3 and incident on the television camera 5 is disposed. 9 and the simultaneous imaging device 11.

In other words, the light transmitted through the optical image distribution device 8 is passed through a rotary filter 13 rotated by a motor 12 in a field-sequential R
The light is incident on the image element 14. Further, the light reflected by the optical image distribution device 8 is incident on the image sensor 16 through the mosaic filter 15.

The frame-sequential signal output from the b1 image element 14 in the television camera 5 is input to the frame-sequential television camera control unit [17], and the simultaneous signal output from the image sensor 16 is input to the frame-sequential television camera control unit [17]. The signal is input to the ti device 18. After each signal is processed and converted into a video signal (image signal) of the same format by these television camera control devices 17 and 18, both signals are input to an image synthesis device 19, where both signals are synthesized and displayed on a television monitor. 7 is output.

This image synthesizing device 19 is configured to combine the film 3 on the film stand 2
is connected to a motion detection device 21 that detects whether or not the camera has moved relative to the television camera 5.

This motion detection device 21 receives a signal from the frame-sequential television camera control device 17 or the simultaneous television camera system til+ device 18, and performs motion detection based on the signal to determine whether or not the image on the film 3 is moving. The result is output to the image synthesis device 19. This motion detection may be performed, for example, by determining frame differences based on input image signals, or may be performed mechanically by providing a sensor on the film table 2 to detect the motion of the film 3. You can do it like this.

The image synthesis device Fi 19 receives the results of the motion detection device 21, and when the movement of the film 3 is large, the image synthesizer Fi 19 applies a stronger weight to the image obtained by the simultaneous method compared to the image obtained by the frame sequential method. ), and when the movement of film 3 is small, the two signals are combined while adhering to the principle that the image obtained by the frame-sequential method is more strongly combined than the image obtained by the simultaneous method. Output to the TV monitor 7.

The rate at which both signals are synthesized can be determined by setting a plurality of standards for the movement of the film 3, and if the detected movement ♀ exceeds a certain set standard, then the image obtained by the frame-sequential method and the simultaneous method can be determined. It can be determined by setting the proportion of the image obtained in a certain ratio.

Naturally, the higher the standard, the higher the proportion of images that can be obtained simultaneously.

The operation of the first practical example configured in this way will be explained below.

Illumination light emitted from the illumination device 4 passes through the film 3 surface to form an optical image, which is then input to the television camera 5. Inside the television camera 5, an optical image distributing device 8 divides the input optical image into one image sensor 1 in a desired ratio, for example 1:1'c.
4 and the other image sensor 16. One image sensor 1
4, the optical image is input through the rotation filter 13, and the other image sensor 16 is input through the mosaic filter 11. Here, the signal output from one image sensor 14 is a frame-sequential signal, and the signal output from the other image sensor 16 is a simultaneous signal.

A frame-sequential signal output from the television camera 5 is input to a frame-sequential television camera control device 17 and output as an image signal. Further, the simultaneous type signal is inputted to the simultaneous type television camera control device 18 and outputted as an image signal.

A motion detection device 21 that constantly monitors the movement of the film 3
outputs the result to the image synthesis device 19.

The image synthesis device 19 receives the results of the motion detection device 21, and
When the movement of the film 3 is large, the images obtained by the simultaneous method are combined more strongly than the images obtained by the frame sequential method.
When the movement of the film 3 is small, images obtained by the frame sequential method are combined more strongly than images obtained by the simultaneous method.

As a result, an image with relatively no color shift is displayed on the display screen of the television monitor 7 when the object to be imaged is moving, and a high resolution image is displayed when the object to be imaged is stationary.

The feature of the field-sequential method is that it has higher resolution than the simultaneous method, but is more likely to cause color shift.The feature of the simultaneous method is that it is less likely to cause color shift than the field-sequential method, but has lower resolution. That's what it means.

In this first embodiment, since the advantages of these features are made to appear, images of better quality can be obtained than in the case of using only one of the devices.

In the above description, a plurality of standards are provided for the motion base, but the invention is not limited to this, and only one standard may be provided. In this case, the motion darkness is binarized, and the simultaneous mode is used when film 3 is moving, and the frame sequential mode is used when film 3 is stopped, and so on. The same effect will be obtained.

In addition to the embodiments described above, effects similar to those of the embodiments described above can be obtained by implementing the following configurations and functions. The results of the motion detection means are sent to the optical image distribution means. The composition ratio of the image composition means is set to be constant, for example, 1:1. The results of the motion detection means are input to the optical image distribution means, and the distribution ratio of the optical images is determined in the same manner as the composition ratio is determined in response to the motion detection means.

With the above configuration and operation, effects equivalent to those of the above embodiments can be obtained with respect to combining images obtained by the frame sequential method and images obtained by the simultaneous method, and overall effects equivalent to those of the above embodiments can be obtained.

FIG. 4 shows a second embodiment of a color f1 image device 31 applied to a microscope.

Electric power is supplied to the lamp 33 constituting the illumination device 32 from a lamp power supply 34 constituted by 1 to a lance shade. Illumination light from this lamp 33 is condensed by a condenser lens 35 disposed above the lamp 33, passes through an aperture of a stage 36, and is irradiated onto a subject 38 on a slide glass 37 facing the aperture.

This slide glass 37 is fixed to the stage 36 by a fixing member (not shown). or,
A cover glass 39 is placed over the portion of the subject 38 placed on the slide glass 37, and the subject 38 is held between the glasses 37 and 39.

An objective lens 42 attached to the tip of a lens barrel 41 is disposed directly above the cover glass 39 to form an image of the subject 38, and this image is transferred to an imaging lens 42 attached to the other end of the lens barrel 41. I am trying to connect the enlarged image by . A TV camera 44 is attached to the top (upper end) of the 1JIWI 41 to which the imaging lens 43 is attached.

The configuration of the TV camera 44 is similar to that of the first embodiment.

That is, a half prism 45 as a beam splitter is arranged on the optical axis inside the TV camera 44, and the imaging lens 4
3, the incident light is split into transmitted light and reflected light. Transmission filter sections 46R, 46G, and 46B of the rotating color filter 46 shown in FIG. 5 are arranged so as to face on the optical axis on this transmitted light side.
The light that has passed through 6B is incident on the first CCD 47.

The rotating color filter 46 is rotatably driven by a motor 48, so that the red (
R), green (G), and blue (B) transmission filter sections 46R, 4
6G and 46B are arranged to face sequentially on the optical axis.
A second CC is provided with a color mosaic filter 49 attached on the optical axis on which the light reflected by the half prism 45 travels.
D51 is provided.

One end of a spring 52, 52 is attached to the stage 36 so that the stage 36 is elastically held in a horizontal plane. The tip of a drive bar 54 connected to an actuator 53 composed of a linear motor or the like is abutted against the side surface of the stage 36. This actuator 53 includes an actuator driver 5 that outputs a drive signal in response to a movement instruction signal from a stage movement instruction means 55.
6 is connected. In addition, the stage movement instruction means 55
A movement instruction signal is transmitted via a switch driver 57 to a changeover switch 58 composed of a semiconductor switch or the like.
It is designed to control the switching of the selector switch 58 by supplying the signal to the ll terminal.

By the way, the first CCD 47 is connected to a first COD control circuit 61 composed of a COD driver, an amplifier, an A/D converter, a frame circuit, a D/A converter, etc. The output end of 61 is connected to contact a of switch 58.

On the other hand, the second CCD 51 is similarly connected to a second COD control circuit 62 composed of a COD driver, an amplifier, etc., and the output end of this second CCD III lit circuit 62 is connected to the contact of the switch 58. ing.

The common contact C of the switch 58 is connected to the input terminal of a video circuit 63 composed of an amplifier, etc.
The output of No. 3 is output to the color monitor 64.

The switch 58 is controlled so that when the movement instruction signal is output, the common contact C is turned on when it contacts a++.
It is now possible to do so.

Note that the output of the timing controller 65, which is composed of a clock circuit, a counter circuit, etc., is sent to the first and second CCDs.
fl, IJ1 are supplied to the timing signal input terminals of the circuits 61 and 62, and also supplied to the motor drive circuit 66 which outputs a drive signal for driving the motor 48.

The operation of the second embodiment configured in this way will be described below.

The light emitted by the lamp 33 and condensed by the condenser lens 35 and transmitted through the object 38 passes through the cover glass 39, the objective lens 42, and the imaging lens 43, and reaches the half prism 45. The half prism 45 splits the incident light into two parts, one of which passes through a rotating color filter 46 and is sent to the first CCD.
47, one passes through a color mosaic filter 49 and is imaged onto a second C0D 51. Stage movement instruction means 55
When there is no instruction to move the stage, that is, when the stage 36 is stopped, the switch 58 is connected to the contact a side. As a result, an image signal is captured by the frame-sequential image capturing means including the rotating color filter 46 and the first CCD 47, and is output from the first COD control circuit 61.
4 displays an image with high resolution and good color reproducibility.

On the other hand, when a stage movement instruction is issued from the stage movement instruction means 55, the actuator driver 56 is connected to the contact point of the switch 58, and at the same time the actuator driver 56 moves the actuator 53.
is driven, and the stage 36 slides horizontally by the tension of the drive bar 54 or the springs 52 and 52. At this point, the output of the second COD control circuit 62 is input to the video circuit 63, and the simultaneous imaging means consisting of the color mosaic filter 49 and the second CCD 51 *
The image with no color shift is observed on the color monitor 64.

The effects of this second embodiment are almost the same as those of the first embodiment.

FIG. 6 shows a color decoy image device 71 according to a third embodiment of the present invention.

The difference from the second embodiment is that the half prism 45 is eliminated, and instead, the reflective disk of the rotating color filter 46 is placed at an angle of 45 degrees with respect to the optical axis. Further, as shown in FIG. 7, the reflective disk of the rotating color filter 46 has R, G, and B color transmitting filter portions 46R, 46G, and 46B in the circumferential direction, and a reflective mirror made of metal vapor deposition or the like. Some parts have 46r attached.

The rest of the structure is the same as that of the second embodiment.

The operation of this third embodiment will be explained below.

Depending on the rotational position of the reflective disk of the rotating color filter 46, the light emitted from the imaging lens 43 is transmitted, reflected, or blocked. R, G, B transmission filter sections 46R, 46
G and 46B, behind the light from the subject, only the light of each color component passes through and forms an image on the first CCD 47. On the other hand, the light is reflected by the reflection mirror portion 46r, passes through the color mosaic filter 49, and forms an image on the second CCD 51. That is, by one rotation of the reflective disk of the rotating color filter 46, light from the object is supplied to both the field-sequential Ili@ means and the simultaneous imaging means.

The switching of the outputs of the first CCD 47 and the second CCD 51, etc. are the same as in the second embodiment.

The effects of this third embodiment are similar to those of the second embodiment. 8th
The figure shows a color imaging device 81 according to a fourth embodiment of the invention.

The difference from the second embodiment is that the rotating color filter 46 is not provided inside the TV camera 44, but is placed on the lighting device 32 side. The rotating color filter 46 is arranged, for example, between the condenser lens 35, that is, between the lamp 33 and the subject 38.
is placed between. This rotating color filter 46 is rotated by a motor 48 to which a drive signal from a motor drive circuit 66 is supplied. As shown in FIG. 9, this rotating color filter 46 includes R, G, and B transmission filter sections 46R,
In addition to 46G and 46B, a transmitting portion 46T is provided which allows light to pass through as is.

Further, the second CCD $1 al1 circuit 62 has a built-in frame memory for storing the image from the second CCD 51.

The rest of the structure is the same as that of the second embodiment.

The operation of this fourth embodiment will be explained below.

The rotational position of the rotating color filter 46 is such that the optical axis is R,
G, B transmission filter sections 46R, 46G.

46B and the non-transparent portion, the first CCD 47 and the first COD control circuit 61 are activated, and images resulting from the sequential illumination are stored in the frame memory in the first COD 111 a11 circuit 61. At this time, the second CCD 49 is controlled by the timing controller 65 so as not to operate.

On the other hand, when the disk of the rotating color filter 46 is in the transmission section 46T, the operation of the first CCD 47 is interrupted and the operation of the second CCD 47 is interrupted.
CD51 is activated. As a result, the image captured by the simultaneous imaging means is stored in the frame memory within the second COD control circuit 62. The operation when the stage 36 is moved by the stage movement instruction means 55 or when the stage 36 is stopped is the same as in the second embodiment.

Further, the effects of this embodiment are almost the same as those of the second embodiment.

FIG. 10 shows a color imaging device Ef91 according to a fifth embodiment of the present invention.
I'm looking forward to it.

The difference from the third embodiment shown in FIG. 6 is that the switch 58
The switch driver 57 that performs the switching is not driven by the output of the stage movement instruction means 55, but is driven by the output of the color misregistration detection means 92 constituted by an image processing circuit or the like. For example, the output signal of the first COD control circuit 61 is input to the color shift detection means 92, and the color shift is detected based on this output signal, and when a color shift is detected, a contact is turned on. ing.

The operation of this fifth embodiment will be explained below.

In this embodiment, whether the stage 36 is moving or stopping is determined by the first COD, which is the output of the frame-sequential imaging means.
The detection is performed using the output signal of the control circuit 61. Other operations are similar to those in the third embodiment.

As for the method of detecting the color shift of the field-sequential R image means, various methods proposed in Japanese Patent Application No. 1-49042, Japanese Patent Application No. 1-260728, and others by the same applicant as the present application may be used. I can do it.

Figure 11 No. 5 Color Vg image device 1 of the sixth embodiment of the present invention
01 shows the main part of 1° The light that passes through the imaging lens 102 of the microscope is transmitted to the TV camera 10
The transmitted light is split into transmitted light and reflected light by a half prism 104 forming part 3, and the transmitted light forms an image on the first CCD 107 via a rotating color disk 106 rotated by a motor 105. On the other hand, the reflected light passes through the color mosaic filter 108 and is sent to the second CCD 10 at a position conjugate with the first CCD 107.
Attach the statue to 9.

The first and second CCDs 107 and 109 are connected to first and second COD control circuits 111 and 112, respectively, and generate image signals corresponding to the subject image from the respective photoelectrically converted signals, and are configured with operational amplifiers and the like. The signals are respectively input to the signal mixing circuit 113.

The output signal of the second COD control circuit 112 is further input to a Y signal separation circuit 114 composed of a filter, etc., and the luminance signal Y separated by this Y signal separation circuit 114 is sent to the first and is input to second frame memories 116 and 117.

The outputs of both frame memories 116 and 117 are input to a motion detection circuit 118, and motion detection is performed. The output of this motion detection circuit 118 is applied to the mixing ratio control terminal of the signal mixing circuit 113, and the mixing ratio of the two image signals input to the signal mixing circuit 113 is controlled according to the output signal of this motion detection circuit 118. Ru.

The output signal of the signal mixing circuit 113 is transmitted to the video circuit 119.
The image of the subject is input to the color monitor 120 via the color monitor 120, and the subject image is displayed in color.

The operation of the sixth embodiment configured as described above will be explained below.

In this embodiment, stage motion detection is performed using the output of the second COD control circuit 112, that is, the output of the simultaneous imaging means. The second signal separated by the Y signal separation circuit 114
The luminance signal Y of the COD image signal is switched by a distribution switch 115 for each field or frame and is stored in the first and second frame memories 116, 1.
17 are stored alternately. The motion detection circuit 118 calculates the displacement between the images stored in the first and second frame memories 116 and 117, and outputs a signal corresponding to the speed of the stage movement.

This output is used to determine the mixing ratio of the two inputs in signal mixing circuit 113. Motion detection ground circuit 118
When the output of the first CCD is small, that is, when the movement of the stage is slow,
11[The output of the first circuit 111 is mixed to a higher level, and when the stage movement is large, the second C which is the output of the simultaneous imaging means is mixed.
This increases the mixing ratio of the OD control circuit 112. When the stage stops, only the output of the COD control circuit 111 is output from the signal mixing circuit 113. As a result, depending on the speed of the stage movement, the image displayed on the color monitor 120 is continuously switched from the image of the frame-sequential imaging means to the image of the simultaneous imaging means.

In each of the above-mentioned embodiments, the first C0D 47, 107, which is the image sensor of the field-sequential R image means, is a line transfer type COD in which a charge storage section and a charge transfer section are common.
Therefore, the rotating color filter 46 or the rotating color disk 106 required a light blocking section, but the first CO
If D is an interline transfer type or a frame transfer type in which the charge storage section and the charge transfer section are different areas, the R, G, and B transmission filter sections 46R, 46G, and 46B can be made wider and the light blocking section can be expanded. can be reduced. Further, in order to detect that the stage 36 is moving, a mark may be attached to the stage 36, and the movement of this mark may be detected. Any means may be used as long as the relative movement between the stage 36 and the layer imaging means can be detected.

[Effects of the Invention] As described above, according to the present invention, the field sequential type llI2
Since the mixing ratio of each image signal obtained from the two-image interstage type imaging means is switched according to the motion detection signal corresponding to the movement of the subject, an image with little color shift is produced when there is movement. is obtained, and when there is little movement, a high-resolution image can be obtained.

[Brief explanation of drawings]

Figures 1 to 3 relate to the first embodiment of the present invention.
The figure is a block diagram of the color ratio imager of the first embodiment, Figure 2 is a schematic block diagram of the first embodiment, Figure 3 is a plan view showing a film movably placed on a film stand, 4 is a block diagram of a color imaging device according to a second embodiment of the present invention, FIG. 5 is a front view of a rotating color filter used in the second embodiment, and FIG. 6 is a color imaging device according to a third embodiment of the present invention. Device configuration diagram, No. 7
The figure is a front view of the rotating color filter used in the third example, FIG. 8 is a configuration diagram of the color imaging device according to the fourth embodiment of the present invention, and FIG. 9 is the rotating color filter used in the fourth embodiment. FIG. 10 is a configuration diagram of a color imaging device according to a fifth embodiment of the present invention, and FIG. 11 is a configuration diagram showing main parts of a color imaging device according to a sixth embodiment of the invention. 1... Color imaging device 2... Film stand 3.
. . . Film 5 . . TV camera 7 . . . Television monitor 9 . . . Camera control unit 8...Optical image distribution device 11...Simultaneous image pickup device 19...Image synthesis device Fig. 4 Fig. 6 Fig. 6 Fig. 10 Fig. 11 Fig.

Claims (1)

[Claims] A frame-sequential imaging means, a simultaneous imaging means, a motion detection output means for outputting a signal corresponding to the movement of a subject to the frame-sequential imaging means and the simultaneous imaging means, and an output of the motion detection output means. 1. A color imaging device comprising: mixing means for changing the mixing ratio of the output of the frame-sequential imaging means and the output of the simultaneous imaging means in accordance with the output.