发明名称 |
Dynamic range compression apparatus, dynamic range compression method, computer-readable recording medium, integrated circuit, and imaging apparatus |
摘要 |
A dynamic range (D-range) compression apparatus that uses a look-up table (LUT) is capable of dynamic compression that compresses the peak input value to the full output range, even when image signals with variable D-ranges are inputted. According to this D-range compression apparatus, D-range compression processing that places the D-range of the image signal within a predetermined output D-range is performed by the visual processing unit converting the tone of the image signal in accordance with the surrounding average luminance signal. Furthermore, with this D-range compression apparatus, the image signal is amplified in accordance with amplification input/output conversion characteristics determined based on the peak value in the image detected by the peak detection unit, and therefore it is possible to perform a dynamic amplification processing in accordance with the peak value so that the D-range of the image signal outputted from the visual processing unit becomes a predetermined output D-range. |
申请公布号 |
US8169500(B2) |
申请公布日期 |
2012.05.01 |
申请号 |
US20090475958 |
申请日期 |
2009.06.01 |
申请人 |
SATO DAISUKE;YAMASHITA HARUO;ITO TAKESHI;PANASONIC CORPORATION |
发明人 |
SATO DAISUKE;YAMASHITA HARUO;ITO TAKESHI |
分类号 |
H04N5/228;G06K9/36;H04N5/235 |
主分类号 |
H04N5/228 |
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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