Linux command
pnmpsnr 命令
文本
复制后可按需替换文件名、目录或参数。
常用示例
Compare two PNM images and display PSNR
pnmpsnr [original.pnm] [compressed.pnm]
Compare a JPEG conversion against the original
pnmpsnr [original.ppm] [converted.ppm]
Compare images from a pipeline
pnmpsnr [reference.pnm] < [comparison.pnm]
说明
pnmpsnr calculates the Peak Signal-to-Noise Ratio (PSNR) between two PNM images. PSNR is a standard metric for measuring image quality, commonly used to evaluate the fidelity of compressed or processed images against the original. Higher PSNR values (measured in decibels) indicate greater similarity between the images. Typical values range from 30-50 dB for acceptable quality, while identical images produce an infinite PSNR. For color images, the tool reports PSNR for each channel (red, green, blue) as well as an overall luminance value. Both images must have the same dimensions and depth. Part of the Netpbm toolkit.
FAQ
What is the pnmpsnr command used for?
pnmpsnr calculates the Peak Signal-to-Noise Ratio (PSNR) between two PNM images. PSNR is a standard metric for measuring image quality, commonly used to evaluate the fidelity of compressed or processed images against the original. Higher PSNR values (measured in decibels) indicate greater similarity between the images. Typical values range from 30-50 dB for acceptable quality, while identical images produce an infinite PSNR. For color images, the tool reports PSNR for each channel (red, green, blue) as well as an overall luminance value. Both images must have the same dimensions and depth. Part of the Netpbm toolkit.
How do I run a basic pnmpsnr example?
Run `pnmpsnr [original.pnm] [compressed.pnm]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
Where can I find more pnmpsnr examples?
This page includes 3 examples for pnmpsnr, plus related commands for nearby Linux tasks.