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Method for correcting distortion of captured image signal and distortion correction apparatus for captured image signal
Method for correcting distortion of captured image signal and distortion correction apparatus for captured image signal
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机译:校正拍摄图像信号的失真的方法和拍摄图像信号的失真校正装置
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摘要
A method and an apparatus for correcting distortions of image-taking video signals and an apparatus for correcting distortions are provided. The apparatus and method thereof are capable of reducing distortion generated in a taken image caused by a hand movement and by a characteristic of an image-taking lens in an image-taking apparatus employing an image-taking device of an X-Y address type. The apparatus has a lens-distortion correction quantity generation section to generate a first correction quantity set in advance as a correction quantity to be used for correcting a distortion, caused by the image-taking lens characteristic, of a taken image at a pixel position on the device on the basis of information on the pixel position. The screen segment of the taken image is divided into many image sub-segments. For each of the image sub-segments, the positional change rate of the device is detected. In each of the image sub-segments, a second correction quantity is then computed on the basis of the rate of the positional change of the device detected for each of the image sub-segments. Finally, the distortion is corrected on the basis of a sum of the first (generated by the lens-distortion correction quantity generation section as a correction quantity for a member subjected to a process to correct the distortion) and second correction quantity.
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