Patent ID: 8313425
Filing Date: 2012-11-20
Classification: A61B

Abstract:
1. An apparatus for measuring a displacement amount of an endoscope image, comprising: a test chart having a test pattern; an alignment section for aligning one of a distal portion of an insert section of an electronic endoscope and said test chart with the other such that said distal portion opposing said test chart and being located in a predetermined circumferential position, said distal portion being inserted into a body cavity; an image compositor for generating a composite image from a test pattern image and a reference image having a reference pattern, said test pattern image being obtained by taking an image of said test chart with said electronic endoscope after said alignment, said reference pattern indicating a reference position and a reference orientation of said test pattern; and a displacement amount obtaining section for obtaining a displacement amount of said test pattern with respect to said reference pattern in said composite image as said displacement amount of said endoscope image, wherein said reference image comprises a mask image for hiding a useless area of said endoscope image, and said mask image includes an unmasked area to expose an area of said endoscope image other than said useless area, and said reference pattern is provided in said unmasked area.