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*停權中*
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作者kize
謝謝您的指教..
電子廠的親戚跟我說目前數位感光元件只能做到8bt,就是只有8的8次方的顏色.
以後如果進步到16,32bt..或許問題就可以解決..
到那時候才會花大錢買數位相機  |
現在光是市面上可以買到的CMOS Image Sensors，就可以達到10bit Output了。
http://www.onsemi.com/PowerSolutions/parametrics.do?id=101682¤tSession=8318706683D5314CEA34F2688021E91F.tomcat1
何況是相機中高階品牌的感光元件，甚至可以達到14bit.
New “Leica M” Uses CMOSIS’ 24-MP CMOS Image Sensor - CMOSIS - CMOS Image Sensors
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The imager for the “Leica M” is based on a 6 x 6 μm2 pixel size, yielding a linear full well capacity of ≥40,000 electrons and a linear dynamic range close to 76dB. Pixel data are digitized by patented low-power, high-speed 14-bit column AD converters. The sensor features an electronic rolling shutter with global reset and noise cancellation through both analog as well as digital correlated double sampling (CDS) resulting in low temporal and spatial noise and non-uniformities.
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Canon U.S.A. : Image Quality
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EOS cameras employ 14-bit converters to process the output of the imaging sensor. Compared to the 12-bit converters used in most digital cameras, the Canon design ensures smoother tonal transitions, more natural gradations, and superior color fidelity. RAW images are recorded at 14 bits so that processed 16-bit TIFF images contain the full range of tonal values captured by the sensor.
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Nikon | Imaging Products | D3S | D3X - Exceptional Image Quality
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Both the D3S and the D3X address two professional demands — speed and precision. The D3S’s rich initial data is swiftly and carefully routed through a 12-channel parallel readout for 14-bit A/D conversion. With the D3X, each of its 24.5 effective megapixels has been specifically designed to carry a larger electrical charge for outstanding light transmission properties and a wider dynamic range. Its image sensor incorporates 14-bit A/D conversion on the chip, delivering fast conversion, high signal-to-noise ratio and low power consumption. In addition to the three formats available on both cameras — FX format, DX format and 5:4 — the D3S also offers 1.2x (30 x 20) crop, which allows you to take advantage of the telephoto effect while maintaining 8.4 megapixels.
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