6 February 2006 A lateral chromatic aberration correction system for ultrahigh-definition color video camera
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Abstract
We have developed color camera for an 8k x 4k-pixel ultrahigh-definition video system, which is called Super Hi- Vision, with a 5x zoom lens and a signal-processing system incorporating a function for real-time lateral chromatic aberration correction. The chromatic aberration of the lens degrades color image resolution. So in order to develop a compact zoom lens consistent with ultrahigh-resolution characteristics, we incorporated a real-time correction function in the signal-processing system. The signal-processing system has eight memory tables to store the correction data at eight focal length points on the blue and red channels. When the focal length data is inputted from the lens control units, the relevant correction data are interpolated from two of eights correction data tables. This system performs geometrical conversion on both channels using this correction data. This paper describes that the correction function can successfully reduce the lateral chromatic aberration, to an amount small enough to ensure the desired image resolution was achieved over the entire range of the lens in real time.
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Takayuki Yamashita, Takayuki Yamashita, Hiroshi Shimamoto, Hiroshi Shimamoto, Ryohei Funatsu, Ryohei Funatsu, Kohji Mitani, Kohji Mitani, Yuji Nojiri, Yuji Nojiri, } "A lateral chromatic aberration correction system for ultrahigh-definition color video camera", Proc. SPIE 6068, Sensors, Cameras, and Systems for Scientific/Industrial Applications VII, 60680N (6 February 2006); doi: 10.1117/12.642969; https://doi.org/10.1117/12.642969
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