08169500 cites 8 patents.

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.

Title
Dynamic range compression apparatus, dynamic range compression method, computer-readable recording medium, integrated circuit, and imaging apparatus
Application Number
12/475958
Publication Number
8169500 (B2)
Application Date
June 1, 2009
Publication Date
May 1, 2012
Inventor
Takeshi Ito
Osaka
JP
Haruo Yamashita
Osaka
JP
Daisuke Sato
Osaka
JP
Agent
Wenderoth Lind & Ponack L
Assignee
Panasonic Corporation
JP
IPC
G06K 9/36
H04N 5/235
H04N 5/228
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