Install NowGamma Correction - Adjust PNM Images | Online Free DevTools by Hexmos
Adjust gamma on PNM images with pnmgamma. Perform gamma correction, convert color spaces, and enhance image luminance easily. Free online tool, no registration required.
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}}
