Method and device for extracting change area in image data and recording medium

TLDR: In this article, the authors proposed a change area extraction method based on a change-area information storing (CAIS) system. But the method is limited to a single image pair where the change area between image data is automatically extracted.

Abstract: PROBLEM TO BE SOLVED: To provide a change area extracting device by which a change area between image data is automatically extracted. SOLUTION: A stereo correspondence point estimating part 14 specifies a correspondence point based on a max. image correlative value which is calculated based on the image value of a specified position between image data of a stereo pair where a prescribed image conversion processing is executed by a rectification processing part 13. A change area extraction processing part 15 generates a change extraction map concerning the change area in the form of binary data to be one of the values '0' or '1' based on the max. image correlative value in the correspondence point specified by the stereo correspondence point estimating part 14 and based on a previously set correlative threshold. The generated change extraction map is held in a change area information storing part 16.