JP2519486B2 - Image processing system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image processing system including an image input device and a computer, and more particularly to an image processing system for processing and displaying an image input to a computer at high speed. .

<Prior Art> Conventionally, in image capturing in a personal computer, since it is handled as R, G, B primary color signal data, it takes time to process the data. However, some images need not be colorized. For example, it is a case where the outer shape of an article flowing on a belt conveyor is captured in real time to detect the shape.

<Object of the Invention> The present invention has been made in view of the above points,
An object of the present invention is to shorten the processing time when color display is not always necessary and to enable high-speed display.

<Structure of the Invention> In order to achieve the above-mentioned object, the present invention enables switching between two modes of a color image capturing mode and a monochrome image capturing mode. Performs processing for each primary color signal,
In the monochrome image capturing mode, processing is performed as a monochrome signal by a monochrome conversion circuit that converts a primary color signal into a binary monochrome signal, and the amount of data to be handled is reduced to 1/3 or less to enable high-speed processing.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention.

The image processing system 1 of this embodiment converts a composite video signal from an image signal source 2 such as a video tape recorder or a video camera into a primary color signal of R, G, B or a binary monochrome signal described later and outputs it. The image input device 3 and the personal computer 4 to which the signal from the image input device 3 is given. Reference numeral 5 is a display device for displaying an image by the R, G, B signals or the monochrome signal from the personal computer 4.

The image input device 3 is a primary color conversion circuit 6 for converting the composite video signal from the image signal source 2 into R, G, B primary color signals.
In the color image capture mode, the primary color signals from the primary color conversion circuit 6 are directly output from the R, G, and B output terminals in FIG. 1, and in the monochrome image capture mode, R, G, and
In this example, a monochrome conversion circuit (threshold processing circuit) that synthesizes the B primary color signals and outputs them as binary monochrome signals with a predetermined threshold value from the respective output terminals of R, G, and B in FIG. 7 and 7.

Therefore, in the image input device 3, in the color image capturing mode, the composite video signal is generated as in the conventional case.
R, G, B primary color signals are converted and output to the personal computer 4, and in the monochrome image capturing mode, the primary color signals are combined and converted into binary monochrome signals, and then R,
It outputs to each personal computer 4 from each output terminal of G and B.

The personal computer 4 includes graphic RAMs 8a to 8c individually corresponding to each primary color signal, a CPU 10 for controlling each unit, and a program memory 11 as in the conventional case. Further, in this embodiment, a color image is provided. In the capture mode, the primary color signals from the monochrome conversion circuit 7 are output to the corresponding graphic RAMs 8a to 8c, respectively, and in the monochrome image capture mode, the output terminals R, G, B of the monochrome conversion circuit 7 are connected in parallel. The synthesized binary monochromatic signal is output to one of the graphic RAMs, in this example, a graphic RAM corresponding to blue.
In the color image capturing mode, the primary color signals read from the graphic RAMs 8a to 8c are applied to the R, G, and B inputs of the display device 5, respectively, and the first switching circuit 12 for outputting to the 8a is provided. In image capture mode,
2 read from the graphic RAM 8a corresponding to blue
There is provided a second switching circuit 9 for commonly providing a monochrome signal of values to the R, G, B inputs of the display device 5.

Next, the operation of the image processing system 1 having the above configuration will be described.

In the color image capture mode, the image input device 3
The composite video signal from the image signal source 2 is converted into R, G, B primary color signals, and the monochrome conversion circuit 7 outputs each primary color signal to the first switching circuit 12 of the personal computer 4 without any processing. To do. The respective primary color signals are respectively written in the corresponding graphic RAMs 8a to 8c, further read out and given to the R, G, B inputs of the display device 5 via the second switching circuit 9 to perform color display. . Such operation is basically the same as the conventional example. Next, in the monochrome image capture mode in the case where color display is not necessary like shape detection, the connection state is as shown in FIG. 1, and the primary color conversion circuit 6 of the image input device 3 causes the composite video signal to be output. Are converted into primary color signals, and the monochrome conversion circuit 7
Then, the primary color signals are combined into a binary monochrome signal with a predetermined threshold value, which is applied in parallel from the R, G, B output terminals to the first switching circuit 12 of the personal computer 4.

In the first switching circuit 12, as shown in FIG. 1, by selecting one of the R, G, and B output terminals of the monochrome conversion circuit 7, here, the B terminal, the monochrome conversion circuit 12 is selected. One of the combined monochrome signals output in parallel from the R, G, and B output terminals 7 is output to the graphic RAM 8a corresponding to blue, and the monochrome signal is written in the graphic RAM 8a. The monochrome signal read from the graphic RAM 8a is given to the second switching circuit 9, and the second switching circuit 9 inputs the monochrome signal to the R, G, B inputs of the display device 5, as shown in FIG. Common to. As a result, a monochrome image is displayed.

When color display is not required, the monochrome image capture mode is set, and the primary color signal is converted into a binary monochrome signal for processing, so that the amount of data to be processed is 1/100 of that of the color display. It becomes 3 or less, and high-speed image processing becomes possible.

FIG. 2 is a flowchart corresponding to the above-mentioned monochrome image capturing mode.

At step n1, the contents of the graphic RAMs 8a to 8c are all cleared and the process proceeds to step n2. In step n2, the monochrome signal data from the monochrome conversion circuit 7 is transferred to the corresponding graphic RAM 8a, and the process proceeds to step n3. At step n3, the data of the graphic RAM 8a is commonly given to each input of the display device 5, and the process is terminated.

In the above-described embodiment, the monochrome conversion circuit 7 is provided on the image input device 3 side, but it goes without saying that it may be provided on the personal computer 4 side as another embodiment of the present invention.

<Effects of the Invention> As described above, according to the present invention, a monochrome conversion circuit for synthesizing R, G, B primary color signals into a binary monochrome signal with a predetermined threshold value is provided, and color display is required. If not, the monochrome image capturing mode is set, and the monochrome conversion circuit converts the primary color signal into a monochrome signal for processing to enable high-speed image display.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flow chart for explaining the operation. 1 ... Image processing system, 3 ... Image input device, 4 ...
Personal computer, 7 ... Monochrome conversion circuit.

Claims (1)

(57) [Claims] 1. An image input device for converting a composite video signal into R, G, B primary color signals, and a computer having a memory individually corresponding to each of the primary color signals. In the image processing system, the primary color signals from the image input device are respectively written in the corresponding memories, and the primary color signals read out from these memories are respectively applied to the R, G, B inputs of the display device. R, G,
A monochrome conversion circuit that combines the B primary color signals into a binary monochrome signal with a predetermined threshold value is provided. In the monochrome image capture mode, the primary color signals are combined by the monochrome conversion circuit and converted into a monochrome signal, Image processing characterized in that the monochrome signal is written in any one of the memories and the monochrome signal read from the memory is commonly applied to the R, G and B inputs of the display device. system.