发明名称 |
Gray level correction apparatus |
摘要 |
An apparatus for printing video images is disclosed. First the percentage of backlighting or people in the image is detected. That is, the probability of the presence of backlighting or people is detected. Then, the density gradation table is modified based on the detection result, and the presence of backlighting or the presence of people in the image is evaluated based on optical information, to select the best density gradation table from among plural density gradation tables, or to synthesize the best density gradation table. A luminance table is generated using the optimized density gradation table, and gradation correction of the image is then accomplished using that luminance table.
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申请公布号 |
US5715377(A) |
申请公布日期 |
1998.02.03 |
申请号 |
US19950504658 |
申请日期 |
1995.07.20 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. |
发明人 |
FUKUSHIMA, TSUMORU;YAMASHITA, HARUO;KANAMORI, KATSUHIRO |
分类号 |
G06T5/40;H04N1/407;H04N1/60;H04N1/62;(IPC1-7):G03F3/08 |
主分类号 |
G06T5/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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