IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

A binarization processing unit generates a binary image by comparing the visual feature of each pixel of an input image with a predetermined binarization threshold and binarizing the value of each pixel of the input image based on the comparison result. The binarization processing unit performs this process while changing the binarization threshold, thereby generating a plurality of binary images. A contour detecting unit calculates the area of a closed region having an overlap between the plurality of binary images, and determines the binarization threshold to be used for detecting a boundary of the corresponding closed region as a contour of an object, based on the area change rate of the corresponding closed region caused by changing the binarization threshold.

主权项

1. An image processing apparatus comprising:
a processor configured to perform a procedure including: generating a plurality of binary images by performing a binary image generation process while changing a predetermined binarization threshold, the binary image generation process being a process of generating a binary image by comparing a visual feature of each pixel of an image representing a plurality of objects with the binarization threshold and binarizing a value of each pixel of the image based on a result of the comparing, calculating an area of a corresponding closed region, the corresponding closed region being a closed region represented in each of the plurality of binary images and having an overlap between the plurality of binary images, and determining the binarization threshold to be used for detecting a boundary of the corresponding closed region as a contour of an object, based on an area change rate of the corresponding closed region caused by changing the binarization threshold.