How to calculate `PSNR`, `SSIM`, `PSLR`, `ISLR`

[PalgunaGopireddy]

In the paper A FINELY FOCUSING METHOD OF SAR USING VERY DEEP NEURAL NETWORK it is written as

To evaluate the effect of focusing, the Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index (SSIM) of the whole image is used in this paper. Meanwhile, in order to evaluate the image effect, Peak Sidelobe Ratio (PSLR) and Integration Sidelobe Ratio (ISLR) of kernel function are used.

But the repository's VDNNAF folder told to be a PyTorch implementation of this paper, doesn't have these terms defined. Instead, it is printing a term called entropy , contrast while running test.py

THough you siad (implenmented by me, not the official). do you know how to calclute these values and what does entropy abd contrast represent? and high value or low value of these represent good defocusing?

[antsfamily]

In the paper A FINELY FOCUSING METHOD OF SAR USING VERY DEEP NEURAL NETWORK it is written as

To evaluate the effect of focusing, the Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index (SSIM) of the whole image is used in this paper. Meanwhile, in order to evaluate the image effect, Peak Sidelobe Ratio (PSLR) and Integration Sidelobe Ratio (ISLR) of kernel function are used.

But the repository's VDNNAF folder told to be a PyTorch implementation of this paper, doesn't have these terms defined. Instead, it is printing a term called entropy , contrast while running test.py

THough you siad (implenmented by me, not the official). do you know how to calclute these values and what does entropy abd contrast represent? and high value or low value of these represent good defocusing?

This paper is not our's, we didn't implement PSNR、SSIM、PSLR and ISLR. You can consult the authors to get code.

[PalgunaGopireddy]

Thanks. I will ask them.

what do the entropy and contrast represent that are printed after running test.py? also, high value or low value of these represent good defocusing?

[aisari]

Please see our paper：Fast SAR Autofocus Based on Ensemble Convolutional Extreme Learning Machine， https://doi.org/10.3390/rs13142683

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---- Replied Message ---- | From | @.> | | Date | 12/08/2023 15:20 | | To | @.> | | Cc | @.***> | | Subject | Re: [aisari/AutofocusSAR] How to calculate PSNR, SSIM, PSLR, ISLR (Issue #8) |

Thanks. I will ask them.

what do the entropy and contrast represent that are printed after running test.py? also, high value or low value of these represent good defocusing?

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