GetHistogram CHANNEL_MASTER Calculation

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Thursday, January 25, 2007 5:18:59 AM(UTC)

Slager

Groups: Registered
Posts: 8

How is the CHANNEL_MASTER from LBitmap::GetHistogram calculated in case of colour images?
I found out that RGB are combined like this 64/255 * R+ 159/255 * G + 32/255 * B.
I assume that these factors are somehow related to the response curve of the human eye. How are these factors calculated/ determined?
Regards,
Slager


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#2 Posted : Sunday, January 28, 2007 6:01:14 AM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Hello,

There is a formula for calculating the intensity value from RGB, and in LEADTOOLS that formula is:
Intensity = R/4 + 5*G/8 + B/8 + 0.5

Thanks,
Maen Badwan
LEADTOOLS Technical Support

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