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| Sony XDCAM EX CineAlta Sony PMW-EX1 / PMW EX-3 XDCAM recording to Express Card flash memory. |
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#1 |
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Major Player
Join Date: Nov 2007
Location: Bristol UK
Posts: 756
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Gamma and Matrix.
Increasing the Gamma or increasing the Matrix in picture profiles.
What are the effects of each on the picture ? I'm just a bit confused about what they do. Thanks. Paul.
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PMW-EX1,Manfrotto ,Sennnheiser ,Glidecam with Smooth Shooter. |
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#2 |
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Regular Crew
Join Date: May 2008
Location: Germany
Posts: 136
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Increasing the gamma-level is for example useful for pushing down values to avoid ones above 100IRE. But I'm not sure what mathematical exactly happens.
The matrix-level seems to be a saturation-control after the matrix-multiplication. If it is done in RGB-colorspace (as the main-matrix) the matrix-level could alter the weight of a linear inter(extra)polation between a grayscale- and the identity-matrix which follows the main-matrix in the signal-flow. In YUV-colorspace it would just alter a multiplier of the UV-components, but I guess it's a more efficient way to calculate the product-matrix once and use that. Last edited by Dominik Seibold; August 15th, 2008 at 01:19 AM. |
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