diff options
author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2022-04-09 18:08:18 +0000 |
---|---|---|
committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2022-04-09 18:08:18 +0000 |
commit | dd63dfa08670e787738e11c84d99e86514347346 (patch) | |
tree | a9f0070f80d8eaf19822267b9fb3b39f338aa8f7 /editor | |
parent | d4162bb3114ed587e9219f34133556f50ce24cef (diff) | |
download | netpbm-mirror-dd63dfa08670e787738e11c84d99e86514347346.tar.gz netpbm-mirror-dd63dfa08670e787738e11c84d99e86514347346.tar.xz netpbm-mirror-dd63dfa08670e787738e11c84d99e86514347346.zip |
Fix wrong bt709<->srgb gamma tables
git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4323 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'editor')
-rw-r--r-- | editor/pnmgamma.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/editor/pnmgamma.c b/editor/pnmgamma.c index 1fdf20eb..e10e138b 100644 --- a/editor/pnmgamma.c +++ b/editor/pnmgamma.c @@ -516,7 +516,7 @@ buildBt709ToSrgbGamma(xelval table[], if (radiance < linearCutoffSrgb * normalizer) srgb = radiance * linearExpansionSrgb; else - srgb = 1.055 * pow(normalized, oneOverGammaSrgb) - 0.055; + srgb = 1.055 * pow(radiance, oneOverGammaSrgb) - 0.055; assert(srgb <= 1.0); @@ -567,14 +567,14 @@ buildSrgbToBt709Gamma(xelval table[], if (i < linearCutoffSrgb / linearCompressionSrgb) radiance = normalized * linearCompressionSrgb; else - radiance = pow((normalized + 0.099) / 1.099, gammaSrgb); + radiance = pow((normalized + 0.055) / 1.055, gammaSrgb); assert(radiance <= 1.0); if (radiance < linearCutoff709 * normalizer) bt709 = radiance * linearExpansion709; else - bt709 = 1.055 * pow(normalized, oneOverGamma709) - 0.055; + bt709 = 1.099 * pow(radiance, oneOverGamma709) - 0.099; assert(bt709 <= 1.0); |