Image processing apparatus and image processing method and its program and recording medium

Abstract

In the DSP which processes an image pickup signal obtained via an optical lens (imaging optical system) and outputs the resulting image pickup signal as processes to an image display section, distortion aberration due to the optical lens is corrected according to a distance from a pixel position corresponding to an optical axis of the optical lens by changing the pixel position for each of a target image in radial directions when the pixel position corresponding to the optical axis is set as a center while suppressing an occurrence of jaggy in the resulting image. With this structure, an image pickup apparatus which corrects distortion aberration by changing pixel position only in radial directions from a pixel position corresponding to an optical axis of the imaging optical system while suppressing an occurrence of jaggy.

Description

technical field [0001] The present invention relates to an image processing apparatus such as an image pickup apparatus for processing an image pickup signal output from a solid-state image pickup element, which is used in electronic cameras such as video cameras, electronic still cameras, and cellular phone cameras. Background technique [0002] In recent years, solid-state imaging devices using the above-described solid-state imaging elements for electronic cameras such as video cameras, electronic still cameras, and cameras for cellular phones have been widely used. Higher requirements have been placed on the quality of images captured using these solid-state imaging devices. Therefore, in the solid-state imaging device, in order to reduce the distortion aberration of the imaging optical system for the imaging signal obtained by the imaging optical system, the measures adopted are to improve the performance of the imaging optical system and use a comb...

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Problems solved by technology

[0012] However, the above-mentioned conventional solid-state imaging device has a problem in that the image displayed on the output image display unit 4 is distorted due to the distortion aberration that may be caused by the imaging optical system used in it.

However, with the method of Patent Document 1, since the correction processing is performed based on the first direction and the second direction respectively, there is a problem that the correction processing in the first direction must be performed in consideration of the correction processing in the second direction.

However, this document does not describe any jaggies that may occur when correcting distortion aberrations, or avoidance of jaggies.

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