how can i show only the selected pixels within an image.

myimage=imread('someimage.jpn') selectedpixels = imcrop(myimage)

filtering "myimage" with the "selectedpixels" to only show this the selected pixels.

Answer 1

[Naga]

Hi John,

To display only the selected pixels from an image using MATLAB, you can use logical indexing to create a mask of the selected region and then apply this mask to the original image. Here's how you can do it

% Load the image
myimage = imread('anyimage.jpg');

% Select the region of interest (ROI)
[selectedpixels, rect] = imcrop(myimage);

% Create a mask of the same size as the image
mask = false(size(myimage, 1), size(myimage, 2));
x = round(rect(1));
y = round(rect(2));
width = round(rect(3));
height = round(rect(4));

% Set the ROI in the mask to true
mask(y:(y+height), x:(x+width)) = true;

% Apply the mask to the image
filteredimage = myimage;
filteredimage(repmat(~mask, [1 1 size(myimage, 3)])) = 0;

% Display the filtered image
imshow(filteredimage);