JPS62164169A - Image analyzing system by personal computer - Google Patents

Abstract

PURPOSE:To attain a high speed process for a picture data stored at a floppy disk by providing a control means which controls each operation of an input means, an arithmetic means, and a display means, and executing each means at a high speed by a personal computer. CONSTITUTION:At the floppy disk, a corrected picture data is stored in a prescribed format after a required correction, such as a conversion to a Mercator image, etc., for the picture data of a satellite obtained by an ultra high resolution radiometer AVHRR, etc., from NOAA is performed. The picture data stored in a disk 1 is read in at a high speed by an input means 2. In other words, the picture data is read in by the input means 2 corresponding to an image analysis function selected with an interactive processing system based on a control means 3 and the operation of a keyboard 4. And after it is processed by an arithmetic means 5, it is stored at a video RAM in a display means 6. The video RAM is capable of storing data of three pictures corresponding to R, G, and B in one bit per one picture element.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image analysis system using a personal computer suitable for processing image data, particularly satellite image data.

(Prior art) Processing of conventional image data, especially Landsat images and NoA
The only way to process and display satellite image data such as A-images was to use a large computer system and expensive auxiliary equipment. In other words, it is necessary to calibrate the image data received from various satellites by converting them into Mercator images, for example, but since the data is 1 pixel and 1 hide, it is necessary to use a large computer system and expensive auxiliary equipment. there were.

(Problem to be Solved by the Invention) Recently, floppy disks that store image data after the above-mentioned calibration and other processing in a predetermined format have become commercially available. The possibility has arisen of being able to freely perform various types of image processing and view the processed images on the spot.

However, as a system for processing and displaying image data stored on commercially available floppy disks such as Landsat on a personal computer, an image analysis system that is satisfactory in terms of required time and processing functions has not yet been developed. It wasn't.

An object of the present invention is to eliminate the above-mentioned problems and provide an image analysis system using a personal computer that can process image data stored on a floppy disk at high speed and has abundant processing functions. .

(Means for Solving the Problems) The M-image u analysis system using a personal computer of the present invention has an input means for rapidly reading image data stored in a predetermined format on a floppy disk, and each image analysis function. The present invention has a calculation means for selecting and executing an image through interactive processing, a display means for displaying an image processed by the calculation means at high speed, and a control means for controlling each operation of the input means, the calculation means, and the display means. The present invention is characterized in that each of the above means can be executed at high speed on a personal computer.

(Function) In the above-mentioned configuration, the processing of each means on the personal computer is executed by a program that is a mixture of a RASIC program and a machine language program. In addition to being able to perform this at high speed, the processed image data is directly stored in the video RAM for image display, so there is no need for a specific frame memory or other memory, and it can be used on CRTs and printers, which are the basic components of personal computers. , a floppy disk unit, a main body, and a keyboard are sufficient to use the image analysis system of the present invention.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the image analysis system of the present invention. First, the floppy disk 1 used in the image analysis system of the present invention contains necessary data such as conversion to Mercator images for satellite image data obtained by AVHRR (Very High Resolution Radiometer) etc. by N0AA. After performing the calibration, the calibrated image data is stored in a predetermined format. The image stored on the floppy disk has 512 columns x 480 lines as one screen.
One screen always includes a 512-byte annotation section. Here, in the above example, the data after image calibration is stored on a floppy disk, but it goes without saying that the same processing can be performed even if the original image data without calibration is stored on a floppy disk if desired. .

Image data stored in the floppy disk 1 having the above-described configuration is read at high speed by the input means 2. That is, in accordance with the image analysis function selected in the interactive processing method by operating the control means 3 and the keyboard 4, the input means 2
The image data read in is processed by the calculation means 5 and then directly stored in the video RAM in the display means 6. This video RAM can store data for three screens corresponding to R, G, and B with one pixel and one bit. The above configuration can be completely achieved with a so-called personal computer, such as NEC's PC-9801E, which is equipped with at least 128 Kb of RAM, an 8-inch or 5-inch floppy disk unit, and a color display.

FIG. 2 is a block diagram for explaining in more detail the input/output method of image data in the image analysis system of the present invention. First, the image data stored in the floppy disk 1 is read at high speed by a program 11 written in machine language for human input in the data input means 2, and the read image data is read into the BASIC for parameter setting in the control means 3.
is supplied to the calculation means 5 together with various parameters inputted by the program 14 according to the above. In the calculation means 5, the supplied image data is calculated by a calculation processing program 12 using RASIC and machine language, and is stored in the video RAM 13 in the display means 6. This video RAM13
One scene consists of 640 columns x 400 lines, and one pixel and one bit can store three screens corresponding to R, G, and B. The image data calculated by the calculation processing program 12 is supplied to the display means 6 as data corresponding to the above-described memory configuration of the video RAM 13. In addition, in the image analysis system of the present invention described above, the CRT which is the display means 6
It takes about 46 seconds to display one screen on the top, making it possible to display at high speed. Various image analysis functions that can be used in the image analysis system of the present invention will be explained below. The functions that can be used with this system are as follows.

1. Screen display on CRT (1) Color code image display function The numerical values of image data are converted into color codes of up to 8 colors and displayed on CRT J-.

(2) Tono 1 - Pattern image display function The numerical value of the image data is converted into a 4/16 gradation dot pattern and displayed on the CRT-,).

(3) False color image display function Displays a composite image of three colors R, G, and B on (1?T) using dot pattern display.

(4) Screen split display function Divide several scenes of images into one screen and display them on the CRT l.

(5) Display function for composite images saved on disk Displays the processed images stored on the floppy disk. Display on T.

2. Printout of image data (1) Gray map creation function A gray map of image data is output from a printer to obtain a hard copy.

(2) Numerical dump processing function Outputs the value of image data using Cl1Ti or a printer.

(3) Line graph display function Creates a line graph of a predetermined line and outputs it on a CRT or by a printer.

(4) Is histogram display function prescribed? +Create a histogram of data in the Jf area and perform CR
Output on T or printer.

3.Other functions (11 force-Sol function Move (display a cursor) dot by dot on the CR7 screen.

(2) Enlarged display function The image is enlarged at a desired magnification of 2 to 20 times and displayed on the CRT.

(3) Latitude and longitude line display function When using N0AA data, wX-rays and longitude lines are automatically displayed on the screen.

(4) Character display function Characters can be freely displayed on the CR7 screen.

(5) Image recording and reproducing function A displayed image can be recorded on a floppy disk at high speed in about 15 seconds, and can be redisplayed on a CRT at high speed in about 6 seconds.

The image analysis system of the present invention is suitable for processing satellite image data, but it can also be used to analyze any other images as long as they are stored in a desired format on a floppy disk. .

(Effects of the Invention) As is clear from the detailed explanation above, according to the image analysis system using a personal computer of the present invention, data stored on a floppy disk using the hardware of the basic configuration of a commercially available personal combinator. Image data can be processed at high speed, and a wide variety of image processing functions can be used.

[Brief explanation of drawings]

FIG. 1 is a Boocock diagram showing an embodiment of the image analysis system of the present invention, and FIG. 2 is a block diagram for explaining the input/output method in the image analysis system of the present invention.

Claims (1)

[Scope of Claims] 1. Input means for reading image data stored in a predetermined format on a floppy disk at high speed; calculation means for selecting and executing each image analysis function through interactive processing; It has a display means for displaying a processed image at high speed, and a control means for controlling each operation of the input means, calculation means, and display means, and each of the means can be executed at high speed on a personal computer. An image analysis system using a personal computer featuring: 2. The image analysis function includes a color code image display function that converts data values into 8-color color codes and displays them on the display means, and a color code image display function that converts the data values into dot patterns of 4 to 16 gradations and displays them on the display means. The main analysis function consists of a dot pattern image display function to display, a false color image display function to display a composite image of three colors on the display means by dot pattern display, and a secondary image division display function and gray map creation. functions, cursor function, numerical dump processing function,
An image analysis system using a personal computer according to claim 1, comprising a line graph display function, a histogram creation function, etc.