Patent ID: 8203624
Filing Date: 2012-06-19
Classification: H04N

Abstract:
1. An image-data processing apparatus comprising: an operation unit; a correcting unit configured to multiply image data generated by an image pickup device that performs image capturing at a certain imaging frequency by a correction gain that is set; a totalizing unit configured to sequentially calculate a total pixel level for every frame from the image data generated by the image pickup device, the total pixel level corresponding to the sum of the pixel levels of the pixels within a certain range in each frame; a history holding unit configured to hold the total pixel levels of a certain number each time the total pixel levels are calculated; an in-phase averaging unit configured to detect the total pixel levels in phase with a flicker phase corresponding to the image data that is being supplied to the correcting unit from the total pixel levels held in the history holding unit on the basis of the imaging frequency and a power frequency supplied from the operation unit to calculate a first average, which is the average of the detected total pixel levels; an average calculating unit configured to calculate a second average, which is the average of the total pixel levels held in the history holding unit; and a correction gain calculating unit configured to calculate the correction gain by dividing the first average calculated in the in-phase averaging unit by the second average calculated in the average calculating unit to set the calculated correction gain in the correcting unit.