Patent ID: 8897601
Filing Date: 2014-11-25
Classification: G06T

Abstract:
1. An image conversion parameter calculation device comprising: a pixel selection unit which randomly selects pixels of a predetermined number or pixels of not more than the predetermined number from a first image; and a parameter derivation unit which derives a conversion parameter concerning the selected pixels selected by the pixel selection unit, the conversion parameter being a parameter for converting, to the first image, a second image that is subject to image alignment with the first image, by repeatedly performing as follows, until a conversion parameter update becomes to be smaller than a first threshold; and wherein the pixel selection unit includes: a pixel extraction unit which randomly extracts a pixel from the first image; and a criterion determination unit which determines whether or not a partial derivative in the pixel extracted by the pixel extraction unit is not smaller than a second threshold, and selecting the pixel as a pixel used for deriving the conversion parameter on a condition that the partial derivative is not smaller than the second threshold.