Questions tagged [perceived-quality]

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How to find PSNR from two images with different size in python

I have 2 images, one original and other is reconstructed from the original via some processing. I want to find the PSNR for the reconstructed image The original has a size of ...
QuantumOscillator's user avatar
4 votes
4 answers
141 views

What Measure to Compare the Color Depth (Distribution of Colors) of Images

I am looking to compare the color depth of multiple images, in order to see which one has the best color depth. I was wondering what is the best way to compute color depth computationally? I've seen ...
CoderMath's user avatar
1 vote
0 answers
268 views

How to Measure Image Quality in an Objective Way

I need a method to measure image quality via computer programming (like Python). I'm doing this so as to compare quality of multiple images. I have found stuff like NMSE, PSNR and SSIM, but don't ...
CoderMath's user avatar
4 votes
1 answer
127 views

Interpreting results of Sobel Edge Detection

I am implementing A No-Reference Perceptual Blur Metric paper. Somewhere in the prep steps they mention the use of vertical Sobel filter for finding vertical edges. The algorithm is summarized in Fig....
Howisitgoing's user avatar
2 votes
1 answer
106 views

How to find sharpness of an image?

I have a rather difficult image processing image. I would like to rank order a set of images I have by their sharpness. The issue is the images themselves are not of the exact same thing. Usual ...
user2551700's user avatar
3 votes
3 answers
133 views

Is it possible to "determine"/"evaluate" the perceived quality of a music audio/video record by using software in an automatic way?

I have a fairly large collection of audio/video bootlegs recorded at live performances by various artists. The recordings all come from very different sources and people through decades, and all of ...
terrorrussia-keeps-killing's user avatar
7 votes
3 answers
6k views

How to Apply the SSIM Measure on RGB Images?

I want to compare the similarity of two images by looking at its structure and colors. I need a measure that takes both structural and color fidelity into account. When I checked the formulation of ...
Lyrk's user avatar
  • 194
1 vote
1 answer
719 views

PSNR and SSIM on non-rectangular image regions

My goal is to compare the quality of an image with its low-resolution versions using an object quality metric like PSNR. Since such metrics can only be applied on same-sized images, I first upscale ...
chronosynclastic's user avatar
0 votes
2 answers
147 views

Does Short-time Fourier transform impact quality of signal?

I am playing with spleeter to separate voice from an audio signal. They go to the frequency domain by computing the Short-time Fourier transform to create a spectrogram. As there are some ...
Samos's user avatar
  • 121
0 votes
3 answers
149 views

Quality of experience engineer

I have noticed certain overlap between digital signal processing and quality assurance for jobs that require expertise in evaluating the quality of the transmitted signals on telecommunication systems ...
JMFS's user avatar
  • 336
-1 votes
2 answers
419 views

Audio Quality Assessment [duplicate]

I need an algorithm to assess the quality of a given audio. The task, is considered to be no-reference. Can anyone help me whether there is any method for quality assessment of any given audio? edit1:...
Quasar's user avatar
  • 1
1 vote
2 answers
3k views

Measuring sharpness/contrast for autofocus

For the implementation of an auto-focus for the raspberry cam I need some measure of image sharpness. I used the following sample picture: The first approach was to compute the shannon entropy of the ...
Anton Alice's user avatar
8 votes
2 answers
4k views

Why is PSNR used for image quality metrics instead of SNR?

I have been trying to determine why is PSNR used instead of SNR for image quality metrics? I have read through several books and most just say that PSNR is used instead of SNR, but don't give a ...
Veridian's user avatar
  • 135