Patent ID: 9367907
Filing Date: 2016-06-14
CPC Classification: G06T,H04N

Claim Text:
1. A flicker reducing apparatus which reduces flicker caused by illumination from an image signal which has been generated by an image sensor and which has the flicker, the apparatus comprising: a line integral value getting section which gets, based on values of pixels included in ones selected from a plurality of horizontal lines that form an image, line integral values of the selected horizontal lines with respect to each image; a discrete Fourier transform section which performs, between the newest image and a number of other images gotten earlier than the newest image, a discrete Fourier transform on a sequence of the line integral values of the respective images; a linear approximation section which obtains an approximation line based on phase information that has been collected as a result of the discrete Fourier transform and which extracts information about the flicker from the approximation line; a flicker coefficient calculating section which calculates a flicker coefficient by reference to the flicker information; and a correction arithmetic section which performs flicker reduction processing on the image signal using the flicker coefficient.