snippetbashTip
pnmgamma — Perform gamma correction on PNM images. More information: <https://netpbm.sourceforge.net/doc/pnmgam
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pnmgammacommandimagesperformcligammapnmcorrection
Problem
How to use the
pnmgamma command: Perform gamma correction on PNM images. More information: <https://netpbm.sourceforge.net/doc/pnmgamma.html>.Solution
pnmgamma — Perform gamma correction on PNM images. More information: <https://netpbm.sourceforge.net/doc/pnmgamma.html>.Convert the image from BT.709 luminance to radiance or sRGB luminance:
pnmgamma -{{bt709tolinear|bt709tosrgb}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Convert the image from radiance or sRGB luminance to BT.709 luminance:
pnmgamma -{{lineartobt709|srgbtobt709}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Specify the gamma value used for the gamma transfer function:
pnmgamma {{[-ga|-gamma]}} {{value}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Specify the gamma value used for the gamma transfer function per color component:
pnmgamma {{[-rg|-rgamma]}} {{value}} {{[-gg|-ggamma]}} {{value}} {{[-bg|-bgamma]}} {{value}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Code Snippets
Convert the image from BT.709 luminance to radiance or sRGB luminance
pnmgamma -{{bt709tolinear|bt709tosrgb}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Convert the image from radiance or sRGB luminance to BT.709 luminance
pnmgamma -{{lineartobt709|srgbtobt709}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Specify the gamma value used for the gamma transfer function
pnmgamma {{[-ga|-gamma]}} {{value}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Specify the gamma value used for the gamma transfer function per color component
pnmgamma {{[-rg|-rgamma]}} {{value}} {{[-gg|-ggamma]}} {{value}} {{[-bg|-bgamma]}} {{value}} {{path/to/image.pnm}} > {{path/to/output.pnm}}Context
tldr-pages: common/pnmgamma
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