JPH06124080A - Large-capacity picture display method and its device - Google Patents

Abstract

PURPOSE:To display a large-capacity picture fetched in a picture memory on a standard monitor television by using an inexpensive and easy means. CONSTITUTION:The large-capacity picture from a CCD camera 4 is fetched in the picture memory 7 in timing by a timing generating means 11 dedicated to the large-capacity picture data, and the picture data is read out in timing by an NTSC standard timing generating means 12 and displayed on the standard monitor television 10. In the case of reading out the picture data, the entire picture is compressed by a thinning display address generation circuit 20 or one part of the picture is segmented and displayed by a segmenting display address generation circuit 21, so that the entire compressed picture or the partial detail picture of the large-capacity picture is viewed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity image display method and apparatus for displaying image data taken from a large-capacity CCD camera into an image memory.

[0002]

2. Description of the Related Art Large-capacity images captured in an image memory,
For example, 1024 × obtained with a 1 million pixel CCD camera
In the conventional method of displaying an image of 1024 pixels, the image is displayed as it is by using a dedicated monitor television, which enables a wide visual field and a visual confirmation of a high resolution image.

FIG. 5 shows the configuration of the image display device having 1024 × 1024 pixels. In FIG. 5, the image signal 32 from the 1-megapixel CCD camera 31 is the preprocessing circuit 33.
Is digitized by and is written in the image memory 34 having a configuration of 1024 × 1024 pixels. The contents of the image memory 34 are sequentially read after being subjected to some processing, and the composite video signal 36 is read by the video signal creating circuit 35.
And is displayed on the monitor television 37 for exclusive use of 1024 × 1024 pixels. Here, all the timings of image acquisition and reading are made by the 1024 × 1024 dedicated timing generation circuit 38, and the camera synchronization signal 39, the A / D timing signal 40, the memory write signal 41, the memory address 42, and the read timing. The signal 43 and the display synchronization signal 44 are taken in synchronously and displayed.

[0004]

However, in the conventional large-capacity image, for example, an image display method of 1024 × 1024 pixels and the device thereof, for example, in the result display in the image recognition device, an image obtained from a 1 million pixel CCD camera. If there is no particular need to display as is, the point that the dedicated monitor TV used is expensive,
Further, when a 1-megapixel CCD camera and a standard camera are used together, two types of monitor televisions are required, and there is a problem that performance and cost are wasted.

Further, since the image on the dedicated monitor TV has a low vertical scanning frequency, the image flickers and is difficult to see. To eliminate the flickering, each pixel is read four times faster than the standard video timing. Had to do so.

In view of the above conventional problems, it is an object of the present invention to provide a large-capacity image display method and apparatus for displaying a large-capacity image on a standard monitor television.

[0007]

A large-capacity image display method of the present invention writes large-capacity image data transferred from a large-capacity CCD camera at a dedicated video timing in an image memory, and then horizontally and vertically. It is characterized in that the whole image is compressed by thinning out every other pixel, or a part of the image is cut out by designating an arbitrary starting point, read out at standard video timing, and displayed on a standard monitor television.

Further, the large-capacity image display device of the present invention has a large-capacity image memory for storing the image data from the large-capacity CCD camera and a large-capacity image for synchronizing the image data in the image memory. Image data dedicated timing generation means, and means for thinning out and reading out a large amount of image data stored in the image memory every other pixel both horizontally and vertically.
It is characterized by comprising a means for reading out a part of the image data from an arbitrary position of the image data as a starting point, a standard timing generating means for synchronizing the video data at the standard video timing, and a standard monitor TV. To do.

[0009]

The present invention has a large-capacity CCD with the above-mentioned structure.
It is possible to read a large-capacity image captured from the camera into the image memory at a dedicated timing as an overall compressed image by thinning out or a partially high-precision image by clipping at a standard video timing and display it on a standard monitor TV.

Further, since the video timing generation circuit for displaying an image from the standard camera can be used as it is, when the 1-megapixel camera and the standard camera are used together, a common circuit and a monitor TV can be used. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A large-capacity image display method and apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 4 conceptually shows an image display method according to the present invention. The image is composed of 1024 × 1024 pixels, and the 1024 × 1024 image in the image memory is displayed on a standard monitor television. Shows. Figure 4
In reference numeral 1, 1 is a large-capacity image having a structure of 1024 × 1024 pixels, and image data transferred from a large-capacity CCD camera of 1 million pixels at a dedicated video timing is digitized and stored in an image memory.

When this image data is read at the standard video timing of the NTSC system, the horizontal and vertical read coordinates are both 0, 2, 4, ... Or 1, 3 ,.
When only even numbers or odd numbers are sequentially specified as 5, ..., Every other pixel in the horizontal direction and every other line in the vertical direction are decimated, so the standard monitor TV is compressed. The whole image 2 is displayed.
In reading an image, if the coordinates (x _0, y ₀ ) of one point S in the image memory are stored and horizontal and vertical read coordinates are designated with S as the origin, (x _Since only the area of ₀ , y ₀ ) to (x _{0 + 511} , y _{0 + 511} ) is cut out, the high-precision partial image 3 is displayed on the standard monitor television. Therefore, 1 million pixels C
A compressed whole image 2 is displayed when viewing the entire image captured in a wide field of view, which is one of the features of the CD camera, and a high-precision partial image when viewing the high-precision image, which is another feature. Since 3 may be displayed, if both displays can be selected by switching, an appropriate image can be displayed depending on the case.

FIG. 1 shows the above-mentioned 1024 × 1024.
FIG. 3 shows a block diagram of a device configuration for displaying an image. In FIG. 1, an image signal 5 from a large-capacity CCD camera 4 having 1 million pixels is digitized by a preprocessing circuit 6 and written in an image memory 7 having a configuration of 1024 × 1024 pixels. The image thus obtained is subjected to some processing by the CPU or the like and then sequentially read out from the image memory 7, output as a composite video signal 9 by the video signal generating circuit 8 and displayed on the standard monitor television 10. .

Here, the timing for capturing an image is 1
A camera synchronization signal 13 and an A / D timing signal 14 generated by the 024 × 1024 dedicated timing generation circuit 11.
The memory write signal 15 and the image memory address 16 are synchronized with each other, while the timing at the time of image display output is synchronized with the image memory address 17, the read timing signal 18 and the display synchronization signal 19 created by the NTSC standard timing generation circuit 12. By doing so, the image captured at the dedicated timing can be displayed on the standard monitor television 10 of the NTSC system.

Also, the NTSC standard timing generation circuit 1
1024 x 1 using image memory address 17 from 2
When reading out the image memory 7 of 024 pixels, the thinning display address generating circuit 20 and the cutout display address generating circuit 21 set the image memory address 17 to the thinning display address 2
By converting to 2 or cutout display address 23,
The horizontal and vertical pixels are thinned out every other pixel for compression, or an arbitrary start point is designated to display a part of the image cut out. The address switching circuit 24 can switch the image memory address at the time of capturing the image and at the time of cutting and displaying.

FIG. 2 shows an example of the configuration of the thinned-out display address generating circuit 20. The image memory address 17 from the NTSC standard timing generation circuit 12 is set to the horizontal address 25.
The vertical address 26 is divided into two, and the upper one bit of each is shifted and the least significant bit is set to 0, so that a doubled value is output. This allows
Since the addresses input with the values 0, 1, 2, ... Are output with the values 0, 2, 4, ..., The output data of the image memory 7 is a horizontally and vertically thinned image. It becomes data.

FIG. 3 shows a configuration example of the cutout display address generating circuit 21. The address (x ₀ , y ₀ ) of the position that is the starting point for clipping is set to the horizontal starting point address register 2
7 and the vertical start point address register 28, and these values are respectively stored in the input horizontal address 25.
The value added to the vertical address 26 is output. As a result, the horizontal and vertical addresses input with values 0, 1, 2, ... Are x ₀ , x _{0 + 1} , x, respectively.
_{0 + 2} , ..., And y ₀ , y _{0 + 1} , y _{0 + 2} ... are output, so the output data of the image memory 7 is a cutout image with the arbitrarily specified position as the starting point. It becomes the data of.

With the above configuration, the 1024 × 1024 image from the large-capacity CCD camera 4 of 1 million pixels is displayed on the standard monitor television 10 of the NTSC system as a thinned compressed image or an image cut out from an arbitrary starting point. it can.

In this embodiment, the NTSC standard timing generation circuit is uniquely provided. However, when it is combined with an image processing device using a standard camera, it is 1024 depending on the display timing on the processing device side.
When the × 1024 image memory 7 is read out and video is output by the common video signal generation circuit, both the large-capacity CCD camera and the standard camera can be switched and displayed by one standard monitor television.

Furthermore, in this embodiment, an image of 1024 × 1024 pixels has been described as a large-capacity image, but the capacity is not limited, and the same can be done with a larger capacity or a smaller capacity.

[0022]

According to the present invention, a large-capacity image captured in the storage means for image data as described above can be displayed on a standard monitor television as a whole compressed image or a partial detailed image, so that a large-capacity CCD can be obtained. The display of images from the camera can be realized by low cost and easy means. When a large-capacity camera and a standard camera are used together, both images can be displayed on one monitor TV.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a large-capacity image display device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a thinning-out display address generation circuit in the embodiment.

FIG. 3 is a configuration diagram of a cutout display address generating circuit in the embodiment.

FIG. 4 is a conceptual diagram of a large-capacity image display method of the present invention.

FIG. 5 is a block diagram showing a configuration of a conventional large-capacity image display device.

[Explanation of symbols]

 4 Large-capacity CCD camera 7 Image memory 10 Standard monitor TV 11 Large-capacity image data dedicated timing generation circuit 12 NTSC standard timing generation circuit 20 Decimated display address generation circuit 21 Cutout display address generation circuit

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display area H04N 5/228 Z

Claims (4)

[Claims] 1. A large-capacity image data transferred from a large-capacity CCD camera at a dedicated video timing is written in an image memory, and then read at a standard video timing and displayed on a standard monitor television. Large-capacity image display method. 2. The large-capacity image display method according to claim 1, wherein, when reading a large-capacity image, the entire image is compressed and displayed by thinning out every other pixel horizontally and vertically. 3. The large-capacity image display method according to claim 1, wherein a part of the image is cut out and displayed by designating an arbitrary start point when reading a large-capacity image. 4. An image memory for storing image data from a large-capacity CCD camera, a large-capacity image data-dedicated timing generating means for synchronizing when the image data is loaded into the image memory, and an image memory. Means for thinning out and reading out the large-capacity image data stored in every horizontal and vertical pixel every other pixel, a means for reading out a part of the image data starting from an arbitrary position of the image data, and a standard video when reading out the image data. A large-capacity image display device comprising standard timing generation means for synchronizing timings and a standard monitor TV.