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BLACK GAMMABLACK GAMMA is a function that allows the gamma curve near black signal levels to be either lowered or boosted with respect to the input level, to achieve the desired picture reproduction in dark areas of the image. Using this function, dark areas of the picture can either be preproduced with deeper darkness and more color saturation, or with higher contrast but less colro depth. In Sony cameras, setting the BLACK GAMMA RANGE to either LOW, L.MID, H.MID, or HIGH determines the signal level range to be adjusted, and adjusting the MASTER BLACK GAMMA value (-99 to +99) determines the shape of the gamma curve to be applied to that signal range.
GAMMA and BLACK GAMMA process the luminance and low-luminance areas in the circuits of the three channels of red, green and blue. So adjusting BLACK GAMMA level the black tonal reproduction, color saturation and color reproduction are affected. As in the example, adjusting MASTER GAMMA applies the same gamma curve to all R/G/B channels. However, Sony cameras also allow BLACK GAMMA to be adjusted individually for each R/G/B channel (R GAMMA/G GAMMA/B GAMMA).
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| tomimages:::: Impressum | Kontakt | ©2007 Thomas Bresinsky | Neue Horizonte Film:::: und Medienproduktion |
