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Improving image quality of dark image areas of plasma display by overlaying noise signals before conventional gamma corrector
Improving image quality of dark image areas of plasma display by overlaying noise signals before conventional gamma corrector
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机译:通过在常规伽玛校正器之前叠加噪声信号来改善等离子显示器暗图像区域的图像质量
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摘要
Targeted insertion of noise signals create additional brightness intermediate stages in dark areas, using noise generator before gamma corrector or using dither circuit between gamma corrector and display. Video signals from color decoder (1) fed to overlay circuit (5) have noise signal of amplitude probability distribution same as video signal, overlaid on them. Output signal (k1) is gamma corrected by 8-bit quantizer (2) thus providing dithered signal (k2) to display (3). Video signals from color decoder (1) are fed to overlay circuit (5), and noise signal of amplitude probability distribution same as video signal, is overlaid on video signal. Output signal (k1) is gamma corrected by conventional 8-bit quantizer (2) thus providing signal dithered by noise. Output (k2) is fed to display (3). Alternatively video signals from color decoder are gamma corrected (2), made non-linear and then fed to dither circuit and to display. Independent claim for device to improve image quality of dark areas of digital image display.
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