how to find object map from saliency map of an image?????
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The codings that i used to find the saliency map of an image is given below:
%%Read image from file
inImg = im2double(rgb2gray(imread('13.jpg')));
inImg = imresize(inImg, [64, 64], 'bilinear');
subplot(1,2,1);
imshow(inImg);title('Original Image');
%%Spectral Residual
FFT = fft2(inImg);
LogAmplitude = log(abs(FFT));
Phase = angle(FFT);
SpectralResidual = LogAmplitude - imfilter(LogAmplitude, fspecial('average', 3), 'replicate');
saliencyMap = abs(ifft2(exp(SpectralResidual + i*Phase))).^2;
%%After Effect
saliencyMap = mat2gray(imfilter(saliencyMap, fspecial('disk', 3)));
subplot(1,2,2);
imshow(saliencyMap, []);title('Saliency Map');
After getting the saliency map, i need to find the object map of the given input image which i am not able to. Please help!!!!!!!!!!
4 Comments
Prof M S Prasad
on 23 Dec 2023
its an old problem . take histogram then select max value as threshold. then 1 sigma value. one of them would produce good result.
Prof M S Prasad
on 13 Jan 2024
hope you got the result.
threshold selection is based on Histogram. analyse one or we can set it 2 sigma.
i think it will give results.
Answers (1)
Image Analyst
on 26 Mar 2014
It looks like it was just thresholded:
objectMap = saliencyMap > someThresholdValue;
I don't know what someThresholdValue might be. It's possible it might change on an image by image basis.
2 Comments
Image Analyst
on 26 Mar 2014
Maybe that didn't pick the correct threshold. Try it the way I suggested. You can use the interactive thresholding app in my File Exchange if you want. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862
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