Dear all
I was wondering if someone knows how to infer the results of a BRISQUE or NIQE score for a particular image.
For example, in CIELAB color difference, a Delta E less than 2 is considered to be imperceptible.
Do we have similar or related perceptual inferences for BRISQUE and NIQE scores as well?
I understand that a lower score is better but I am looking for the perceptual impact of these scores.
For example, what is the impact of 1 unit NIQE score or 10 units of BRISQUE score?
I am testing images of a same scene taken with two different cameras to test their image quality.
I would appreciate if you could provide some references for the same.
Thanks in advance
Aiman
Hello,
W.r.t: "Do we have similar or related perceptual inferences for BRISQUE and NIQE scores as well."
I am not really sure we have a consensus regarding a specific acceptable quality threshold, however, the PSNR metric (being a related perceptual inference) is deemed to pin-point perceptual adequate quality once it reaches to 30 dB.
Note that the BRISQUE and NIQE have different scales.
Both BRISQUE and NIQE are two well-known No-reference image quality measures in practice. You may note that No-reference image quality measures are different from reference-based image quality measures such as PSNR and SSIM, where we have the original image and another version of the image (may be degraded version).
Now, I will try to come o your question, the BRISQUE score from an image will be a positive value ranges from 0 to 100. A low BRISQUE measure indicates that the image is having high quality.
While considering NIQE measure also a smaller score indicates better perceptual quality. The range of possible NIQE measures are not defined.
If you have some experience in Matlab, you can try these two functions
S1=niqe(A);
S2=brisque(A);
then add some noise or apply filtering on the image A then check the same measures. You may get high values as compared the measures from the original image.
I hope the above-mentioned discussion will help you.
Dear Aiman Raza
This article tutorial might be helpful, have a look
https://learnopencv.com/image-quality-assessment-brisque/
Hope this helps.
Kind Regards
Qamar Ul Islam
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