How to subtract background from an image?

Matlab- Saving an image?

• I wanted to know what is the difference between imshow(I2, []) and imshow(I2) I checked out your post on Background Illumination and the image is dark when using only imshow(I2) while the image is great when using imshow(I2, []) The problem I am facing now is that I want to use the good image and perform histeq on it .... But when using I3=(I2,[]) -----Error I3=histeq(I2,[])---Error... How to pass on the good image to another variable so that I can perform other operations on it... Can you please help me... I am new to matlab.... Thanks a lot... The code I am using: I = imread('image.jpg'); backApprox = blkproc(I,[16,16 ],'mean(x(:))'); backApprox = (backApprox)/255; % Convert image to double. figure, surf(backApprox); set(gca,'ydir','reverse'); % Reverse the y-axis. backApprox256 = imresize(backApprox, [64 512], 'bicubic'); figure, imshow(backApprox256) % Show resized background image. I = im2double(I); % Convert I to storage class of double. I2 = I - backApprox256; % Subtract the background from I. I2 = max(min(I2,1),0); % Clip the pixel values to the valid range. figure, imshow(I2,[]);-Good Image figure, imshow(I2);-Dark Image

• Answer:

  b=a[:,:]