METHOD FOR EXTRACTING DENSITY FLUCTUATION CONSTITUTION PICTURE ELEMENT IN IMAGE AND METHOD FOR JUDGING CONCENTRATION FLUCTUATION MASS

摘要

PURPOSE: To properly extract a picture element by setting a partial image including a picture element to be observed and the surrounding picture element, performing an operation to each concentration data at a specific region and a remaining region inside the image, obtaining the ratio of the operation result, and then judging the aptitude as a density fluctuation constitution element according to the ratio. ;CONSTITUTION: Light of a light source 16 is applied to parts 1 via a half mirror 15 and an image is picked up by a video camera 2 via the mirror 15. The light and shade signal for each picture element are obtained by a CCD sensor inside the camera 2, are digitized, and are sent to a computer 3. A partial image is set to 25 picture elements (5×5), its center is set to a picture element to be observed, a specific region is set to 9 picture elements (3×3) at the center of the picture element to be observed, and the remaining region is set to the outer-periphery 16 picture elements, and an average value is used for operation. First, the picture elements (3×3) are set to the initial picture elements to be observed, the average value of each density data is obtained for the specific and remaining regions, magnitude of the ratio is judged according to a threshold, and then those with aptitude as density fluctuation constitution elements are extracted.;COPYRIGHT: (C)1994,JPO&Japio