Joseph Tainter wrote: > http://www.digital.pentax.co.jp/ja/35mm/k10d/image/k10d_09.gif > > The left graph is the RAW analogue signal from CCD. Middle is the prevalent > 12 bit conversion and the right of course is the 22 bit conversion. > > Ken > > ----- > > Thanks, Ken. But, er, am I the only one who doesn't understand what > these charts are showing? There are no captions (not even In Japanese, I > think), no labels for the axes, no labels for what the red lines and > dots mean.
The red line in the left chart is a hypothetical actual, continuous, analog signal. The middle chart represents analog -> digital conversion with a 12-bit output. The right chart represents analog -> digital conversion with a 22-bit output. In the middle and right charts: a) the same analog signal is represented as the black line b) the horizontal axis indicates the area of each digital pixel c) the vertical axis represents the color values that the analog -> digital conversion can return, black at the bottom and white at the top d) the grid lines for the vertical axis on the right are closer together than the ones in the middle chart to show the finer gradations of output color possible with the e) the red dots show the output values for at each pixel under either 12-bit or 22-bit digital output -- Thanks, DougF (KG4LMZ) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
