BT.601 to BT.709 in Android

markanini · 16th December 2016, 03:02

I reached out to a Android dev suggesting a color conversion feature in his software and he pointed me to an API reference: https://developer.android.com/refere...lorMatrix.html I'm not really knowlegable about programming or math to suggest the best implementation. Anyone have an idea?

Asmodian · 17th December 2016, 01:46

R709 = 0.9395 ∗ Rsmptec + 0.0502 ∗ Gsmptec + 0.0103 ∗ Bsmptec
G709 = 0.0178 ∗ Rsmptec + 0.9658 ∗ Gsmptec + 0.0164 ∗ Bsmptec
B709 = −0.0016 ∗ Rsmptec − 0.0044 ∗ Gsmptec + 1.0060 ∗ Bsmptec

So your matrix would look like:

Code:

[0.9395,  0.0502, 0.0103, 0, 0
 0.0178,  0.9658, 0.0164, 0, 0
-0.0016, -0.0044, 1.0060, 0, 0
 0.0000,  0.0000, 0.0000, 1, 0]

markanini · 19th December 2016, 12:27

Thanks!

16th December 2016, 03:02	#1 \| Link
markanini Registered User Join Date: Apr 2006 Posts: 299	BT.601 to BT.709 in Android I reached out to a Android dev suggesting a color conversion feature in his software and he pointed me to an API reference: https://developer.android.com/refere...lorMatrix.html I'm not really knowlegable about programming or math to suggest the best implementation. Anyone have an idea?

17th December 2016, 01:46	#2 \| Link
Asmodian Registered User Join Date: Feb 2002 Location: San Jose, California Posts: 4,407	R709 = 0.9395 ∗ Rsmptec + 0.0502 ∗ Gsmptec + 0.0103 ∗ Bsmptec G709 = 0.0178 ∗ Rsmptec + 0.9658 ∗ Gsmptec + 0.0164 ∗ Bsmptec B709 = −0.0016 ∗ Rsmptec − 0.0044 ∗ Gsmptec + 1.0060 ∗ Bsmptec So your matrix would look like: Code: [0.9395, 0.0502, 0.0103, 0, 0 0.0178, 0.9658, 0.0164, 0, 0 -0.0016, -0.0044, 1.0060, 0, 0 0.0000, 0.0000, 0.0000, 1, 0] __________________ madVR options explained

19th December 2016, 12:27	#3 \| Link
markanini Registered User Join Date: Apr 2006 Posts: 299	Thanks!