comparing two images quantitavely
4 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Very Determined
il 9 Nov 2016
Commentato: Very Determined
il 14 Nov 2016
I want to compare a number of images with a reference image to determine which image matched the reference image most. I think getting a number out of this comparison can be useful. Here is the code:
I1 = imread('I1.jpg');
I2 = imread('I2.jpg');
obj = imshowpair(I1,I2, 'diff')
obj.CData
Avg = mean (mean(obj.CData))
Is it possible to use the CData information for this comparison? Am I doing this right? I also couldn't find what kind of information is stored in CData. And is there any better way to quantify this comparison?
Thank you
0 Commenti
Risposta accettata
Image Analyst
il 9 Nov 2016
No, that's not right. You'd better off using ssim(), immse(), or psnr(). Or MAD: https://en.wikipedia.org/wiki/Median_absolute_deviation, https://en.wikipedia.org/wiki/Average_absolute_deviation
3 Commenti
Image Analyst
il 14 Nov 2016
CData is the pixel values of the image displayed in the axes. It seems to be the actual pixel values, not the 24 bit RGB values, so it you displayed a floating point image in the range 1000 to 123456, it would give you those numbers back, not numbers in the 0-255 range.
Più risposte (0)
Vedere anche
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!