JPH028450Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Background of the technology Facsimile machines and the like that are effective as a means of video communication use an imaging device that uses a line sensor to input video. This has a line sensor such as a CCD element that inputs brightness information for one horizontal line of the image, and has a structure that inputs one image by scanning the sensor or object in the vertical direction. It is an imaging device. For example, binarization is performed on the video signal input by such an imaging device, so it is necessary to observe the level state of the input signal in order to determine the threshold for the binarization. .

(2) Prior art and problems In order to perform the above observation, it is necessary to be able to directly monitor the video signal from the line sensor as a video. To this end, conventionally, video signals from line sensors were input into an oscilloscope or the like for observation. However, with this method, the oscilloscope can only observe one object at a time.
Since there was only a line video signal, it was difficult to tell which part of the original video the video signal corresponded to. Furthermore, it has been difficult to check the state of the binarized image after the video signal has been binarized.

(3) Purpose of the invention In order to eliminate the above-mentioned problems, the present invention branches the optical path of the optical system that forms an image on the line sensor in the middle.
To provide an imaging device in which a television camera is installed on a branched imaging plane to enable observation of a two-dimensional image of the original image, and furthermore, the image and a video signal from a line sensor can be observed in a superimposed manner. The purpose is to

(4) Structure of the invention The invention includes an optical system for imaging, a line sensor for detecting a one-dimensional image in an input image inputted by the optical system, and a line sensor for detecting a one-dimensional image in an input image inputted by the optical system. a branching means provided in an optical path to the branching means, a two-dimensional imaging means for capturing the input image branched by the branching means, and a video signal from the line sensor and an image from the two-dimensional imaging means. An object of the present invention is to provide an imaging device characterized by having observation means for selectively observing the video signal from the two-dimensional imaging means or for observing the video signal from the two-dimensional imaging means at the same time.

(5) Examples of the invention Examples of the invention will be described in detail below. FIG. 1 is an overall configuration diagram of an imaging device according to the present invention. A target image 1 is imaged on a line sensor 5 via an imaging lens 3 and a half mirror 4 attached to an imaging device main body 2. On the other hand, the image split by the half mirror 4 is focused on the television camera 6. The video signal from the line sensor 5 and the video signal from the television camera 6 are input to the processing device 7 via signal lines 8 and 9, respectively. Note that the line sensor 5 is configured so that it can be scanned in the direction of an arrow 10 by a scanning device (not shown) and can input one image 1.

Next, FIG. 2 is a specific circuit configuration diagram of the processing device 7 portion of FIG. 1. The input terminal 11 has a first
The signal line 8 from the line sensor 5 in the figure is connected,
Input terminal 11 is connected to the non-inverting input of comparator 13 and to terminal a of switch 18. Also, comparator 1
The inverting input of 3 and the amplifier 15 have a volume of 17.
is connected. A positive power source is connected to the terminal e of the volume 17, and a negative power source is connected to the terminal f. The output of comparator 13 is connected to terminal b of switch 18. The output of switch 18 is connected to one input of amplifier 16. A volume 15-1 is connected to the amplifier 15, and the output of the amplifier 15 is connected to the inverting input of the comparator 14.

Further, the input terminal 12 is connected to the signal line 9 from the television camera 6 shown in FIG. The output of the amplifier 16 is connected to the terminal c of the switch 19, and the output of the comparator 14 is also connected to the terminal d of the switch 19. The output of switch 19 is then connected to monitor 20.

In the imaging device configured as described above, first,
The operation when the switch 18 is connected to the terminal a side and the switch 19 is connected to the terminal c side will be explained. Line sensor 5 input to input terminal 11 (Fig. 1)
The video signal is input to the amplifier 16 via the a terminal of the switch 18. On the other hand, the video signal from the television camera 6 (FIG. 1) input to the input terminal 12 is also input to the amplifier 16. Therefore, in the amplifier 16, the video signal from the line sensor 5 and the video signal from the television camera 6 are combined,
The composite image is displayed on the monitor 20 via the c terminal of the switch 19. FIG. 3a is an example of the composite image. 21 is a video signal from the television camera 6, which is a two-dimensional image. And 22
The thick black dots -1, 22-2, and 22-3 are video signals from the line sensor 5. Now, if the line sensor 5 is scanned in the direction of the arrow 23, it can be easily seen that the imaging position of the line sensor 5 is the position indicated by the broken line 24, as can be seen from the figure.
In this way, since the television camera 6 and the line sensor 5 observe the video signal from the same imaging lens 3 (FIG. 1), these two signals can be superimposed. As a result, the entire two-dimensional image can be viewed using the video signal from the television camera 6, so the imaging position of the line sensor 5 can be known at a glance.

Next, referring to FIG. 2, the operation when the switch 18 is connected to the terminal b side and the switch 19 is connected to the terminal c side will be described. The video signal from the line sensor 5 input to the input terminal 11 is input to the comparator 13, where it is binarized at a slice level (threshold) set by the volume 17. That is, first, the power supply voltage input to terminals e and f is divided by the volume 17 to create a predetermined slice level. In the comparator 13, an output appears only when a video signal with a brightness level higher than the slice level is input. In other cases, no output appears. The video signal thus binarized is input to the amplifier 16 via terminal b of the switch 18. On the other hand, since the video signal from the television camera 6 is input to the other input of the amplifier 16 via the input terminal 12, the amplifier 16 receives a signal obtained by binarizing the video signal from the line sensor 5 and a signal from the television. Video signals from the camera 6 are combined and sent to the monitor 20 via the c terminal of the switch 19.
The composite image is displayed. FIG. 3c is an example of the composite image. 21 is a two-dimensional image from the television camera 6 as in FIG. 3a, and 27-
1, 27-2, and 27-3 are images obtained by converting the video signals from the line sensor 5 into binary values. At this time, the video signal from the line sensor 5 changes in accordance with the brightness level at each position on the line sensor, as shown at 25 in FIG. 3b. By adjusting the slice level with the volume 17, the slice level indicated by the broken line 26 in FIG. 3b increases or decreases, so that the binarized image 27- 1 to 3 become longer or shorter. Thereby, the imaging position of the line sensor 5 can be confirmed, and an appropriate slice level for binarization can be set.

Finally, in Figure 2, switch 19 is connected to terminal d.
This section explains the operation when connected to the side. In this case, the video signal from the line sensor 5 is not monitored, so the switch 18 becomes irrelevant. The video signal from the television camera 6 input to the input terminal 12 is input to the comparator 14, where it is binarized. The slice level at this time is still set by the volume 17, but its gain is adjusted by the volume 15-1 attached to the amplifier 15.
The difference between the binarization level of the video signal from the line sensor 5 and the binarization level of the video signal from the television camera 6 is corrected. The video signal thus binarized by the comparator 14 is displayed on the monitor 20 via the terminal d of the switch 19. FIG. 3d is an example of the image. According to this, it is possible to binarize the video signal from the television camera 6 using the slice level at which the video signal from the line sensor 5 was previously binarized, as shown in FIG. 3d. Since it can be observed as a two-dimensional binarized image, it is possible to check overall whether the slice level is appropriate.

To summarize the above operations, first, switch 18
When the switch 19 is on the terminal a side and the switch 19 is on the terminal c side, an image obtained by directly combining two video signals from the line sensor 5 and the television camera 6 can be observed, and the imaging position of the line sensor 5 can be confirmed. Can be done. Next, when the switch 18 is on the terminal b side and the switch 19 is on the terminal c side, an image is observed that is a combination of the binarized video signal from the line sensor 5 and the video signal from the television camera 6. Therefore, the binarization level of the video signal for each imaging position from the line sensor 5 can be appropriately adjusted. When the switch 19 is on the terminal d side (the switch 18 is not used), the video signal from the television camera 6 can be binarized with a value corresponding to the binarization level in the case of the line sensor 5. It can be confirmed as an overall binarized image.

In this embodiment, a half mirror is used to branch the optical path, but a means for storing the image from the television camera 6 is provided, and a branching means for switching between imaging by the line sensor and the television camera is also provided. Alternatively, input may be performed first by a television camera, then input by a line sensor, and then these images may be combined.

(7) Effects of the invention According to the invention, it is possible to synthesize the overall two-dimensional image of the original video and the image based on the video signal from the line sensor, and it is possible to confirm the imaging position of the line sensor. . Furthermore, it is possible to similarly combine the video signal from the line sensor with a binarized image, and it is possible to appropriately adjust the binarization level of the video signal from the line sensor. Furthermore, the entire binarized two-dimensional image can be observed using the binarization level, and it can be confirmed whether the binarization level is appropriate.

[Brief explanation of the drawing]

Figure 1 is an overall configuration diagram of the imaging device, Figure 2 is a specific circuit configuration diagram of the processing device, and Figure 3a is an example of a composite image of a video signal from a television camera and a video signal from a line sensor. Figure 3b is a diagram showing an example of the brightness level change and slice level of the video signal from the line sensor, and Figure 3c is a diagram showing the video signal from the television camera and the binarized video from the line sensor. FIG. 3d is a diagram showing an example of a composite image of signals, and FIG. 3d is a diagram showing an example of a binary video signal from a television camera. 4...Half mirror, 5...Line sensor, 6
...TV camera, 7...Processing device, 13,14
... Comparator, 15, 16 ... Amplifier, 15-1,
17... Volume, 18, 19... Switch,
20...Monitor.

Claims (1)

[Claims for Utility Model Registration] (1) An optical system for imaging, a line sensor for detecting a one-dimensional image in an input image inputted by the optical system, and a line sensor for detecting a one-dimensional image in an input image inputted by the optical system; a branching means provided in the optical path to the sensor; a two-dimensional imaging means for capturing the input image branched by the branching means; and a video signal from the line sensor and a two-dimensional imaging means for capturing the input image branched by the branching means. An imaging device comprising observation means for selectively observing the video signal from the two-dimensional imaging means or simultaneously observing the video signal from the two-dimensional imaging means. (2) The observation means has a first binarization means for binarizing the video signal from the line sensor, and superimposes the video signal from the line sensor and the video signal from the two-dimensional imaging means. A utility model characterized in that it has a switching means for selectively switching between monitoring the signal from the line sensor in a binarized manner, or superimposing and monitoring the signal obtained by converting the signal from the line sensor and the video signal from the two-dimensional imaging means. An imaging device according to registered claim 1. (3) The observation means includes a second binarization means for binarizing the video signal from the two-dimensional imaging means using the binarization slice level in the first binarization means. An imaging device according to claim 1 or 2 of the claimed utility model registration.