Jvc Kenwood Corporation

Masakazu Tateishi

Toshihide Kobayashi

Etsuro Imade

A first multiplier multiplies a correction value by an adjustment coefficient and generates an adjusted correction value, the correction value being read from the correction value table, and the adjustment coefficient being determined from a zoom magnification and a focus distance. A second multiplier multiplies the adjusted correction value by a cosine of an angle formed between a position of each target pixel and the center of the frame and generates a horizontal correction value that corrects the target pixel in a horizontal direction. A horizontal filter adds all multiplication results obtained by multiplying a plurality of pixels in a left-right direction with each target pixel as a center, by left-right asymmetric coefficients, generates a horizontal high-pass filter component, adds, to each target pixel, a horizontal correction component obtained by multiplying the horizontal high-pass filter component by the horizontal correction value, and corrects each target pixel in the horizontal direction.

Image processing device and image processing method capable of correcting distortion occurred in an image captured through a zoom lens

A linear matrix circuit generates a second R signal, a second G signal, and a second B signal by performing a matrix operation of a correction coefficient of 3 rows&#xd7;3 columns including first to third correction coefficients, fourth to sixth correction coefficients, and seventh to ninth correction coefficients on a first R signal, a first G signal, and a first B signal. An R coefficient corrector performs correction so that the first correction coefficient to be multiplied by the first R signal is caused to be close to 1 and the second and third correction coefficients to be respectively multiplied by the first G signal and the first B signal are caused to be close to 0, as a first difference value obtained by subtracting the first G signal from the first B signal increases when the first difference value exceeds a first threshold.

Growing community of inventors

Yokohama, Japan

Masakazu Tateishi