imageprocessing-electronicpublications / stb-image-metrics-demo

Demo of stb-image-metrics

stb-image-metrics demo

This utility compares two graphics files based on metrics.

Demo of stb-image-metrics.

Metrics

Origin and Compare:

Metrcics:

stbimmetrics lena.png lena.quant444.png lena.quant444.psnr.png 
Load: lena.png
image: 256x256:3
Load: lena.quant444.png
image: 256x256:3
type: psnr
metric: 18.663233
Save png: lena.quant444.psnr.png

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RGB mode:

Name	Image metric	Value	UM
MSE		0.013604	0.208771
PSNR		18.663233	0.470890
SDSNR		13.888971	0.454668
Corelation		0.953666	0.285007
SSIM		0.618509	0.050606
VIFP1		0.170903	0.053111
SMALLFRY		83.753342	0.341786
SHARPENBAD		0.389942	0.138531
NHW-C		0.145290	0.422748
NHW-N		0.072673	0.550836
NHW-R		0.116387	0.381794

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YCbCr mode:

Name	Image metric	Value	UM
MSE		0.006030	0.255863
PSNR		22.196735	0.513536
SDSNR		21.873943	0.507061
Corelation		0.951516	0.278486
SSIM		0.608033	0.046795
VIFP1		0.227644	0.094781
SMALLFRY		85.867256	0.385938
SHARPENBAD		0.371371	0.125152
NHW-C		0.091878	0.474065
NHW-N		0.075381	0.545821
NHW-R		0.078292	0.421576

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