Patent ID: 8134615
Filing Date: 2012-03-13
Classification: H04N

Abstract:
1. An image defect correction apparatus for correcting image defect components included in luminance signals outputted in a predetermined order from two-dimensionally arranged light-receiving elements via a plurality of vertical charge coupled devices and at least one horizontal charge coupled device, comprising: a determination unit adapted to determine an X address that specifies each of at least one vertical charge coupled device including at least one point defect among the plurality of vertical charge coupled devices, and determine a Y address that specifies a position of the point defect on the specified vertical charge coupled device; a first correction value calculation unit adapted to determine a first correction value in accordance with a difference between an average value of luminance signals obtained by the vertical charge coupled device specified by the X address determined by said determination unit and an average value of luminance signals obtained by the plurality of vertical charge coupled devices when the light-receiving elements face a predetermined ineffective signal region; a region determination unit adapted to determine, in a case where there are a plurality of point defects in a same vertical charge coupled device, to which of a plurality of regions divided by Y addresses of the plurality of point defects each of Y-directional positions of luminance signals outputted from the horizontal charge coupled device is positioned; a second correction value calculation unit adapted to select, among a plurality of predetermined coefficients corresponding to the plurality of point defects, a predetermined coefficient corresponding to the region determined by said region determination unit, and calculate a second correction value by multiplying the first correction value calculated by said first correction value calculation unit by the selected predetermined coefficient; and a correction unit adapted to correct the luminance signals outputted from the horizontal charge coupled device, using the second correction values calculated by said second correction value calculation unit.