Picture Quality Compensation System Based on Brightness Polarity

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The spatial frequency response of vision fluctuates with positive brightness polarity, a white figure against a gray background, and negative polarity, a black figure against a gray background. This article describes psychophysical experiments showing that the line spread function of positive polarity always exhibits negative response at the surround. The line spread function of negative polarity exhibits positive polarity response at the surround at a low contrast and disappears at a high contrast. Picture edges glare when the compensation amount of a contour compensation circuit for a positive-negative symmetric picture increases because the edges of positive polarity are enhanced excessively. A circuit independently controlling contour components of positive polarity and negative polarity was made to perform picture-quality evaluation experiments. The experiments confirmed that picture quality is improved by a 0.5 step (using the 5-step rating scale evaluation) as compared with the conventional positive-negative symmetric waveform compensation circuit, and improvement can be achieved even under conditions of ambient lighting.
Publication Date: 1985-02-01
DOI: 10.5594/J14100
Link: https://doi.org/10.5594/J14100
Author(s): Haruo Sakata

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Haruo Sakata; Picture Quality Compensation System Based on Brightness Polarity, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985. Available at https://doi.org/10.5594/J14100

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Haruo Sakata; Picture Quality Compensation System Based on Brightness Polarity, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985. Available at https://doi.org/10.5594/J14100

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Haruo Sakata; Picture Quality Compensation System Based on Brightness Polarity, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985. Available at https://doi.org/10.5594/J14100

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<span class="citation">Haruo Sakata; <cite>Picture Quality Compensation System Based on Brightness Polarity</cite>, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985. Available at <a href="https://doi.org/10.5594/J14100" target="_blank" rel="noopener">https://doi.org/10.5594/J14100</a></span>

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Haruo Sakata; Picture Quality Compensation System Based on Brightness Polarity, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985
doi: 10.5594/J14100
url: https://doi.org/10.5594/J14100

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Haruo Sakata; <cite id="bib-10-5594-j14100">Picture Quality Compensation System Based on Brightness Polarity</cite>, SMPTE Journal ( Volume: 94, Issue: 2, February 1985); SMPTE, 1985
<span class="doi">10.5594/J14100</span>
</li>