... Ok, my approach: R = img( : , : , 1) G = img( : , : , 2) B = img( : , : , 3)
does not work ... although I remember it somehow using it with IPD & scilab 5.4.1...good old times :-) In SciCV a image is a mlist But still same issue: /// build the imageimg = mlist(['v','r','g','b','a'], zeros(10,10), zeros(10,10), zeros(10,10), zeros(10,10));// extract the R-planeR = img.r;// modify the R-planeR(3:6,4:8) = 255;// write the R-plane back to the imageimg.r = R;// check the image contentdisp(img); Why is this not possible with an image nativly created with SciCV ? Thanks, Philipp Am Di., 5. März 2019 um 10:24 Uhr schrieb P M <[email protected]>: > Dear all, > > I read an RGB image with ScCV imread: > > img = imread("path_to_image",CV_LOAD_IMAGE_COLOR); > > The result is an image of type: CV_8UC3 > > I can display the image pixel values with: disp(img) > > The image itself is of type: Mat (Mlist) > > So far, so clear. > > Now, I want to extract a single plane..lets say the R-plane > > I would normally do something like this: > > R = img( : , : , 1) > > But for some reason it does not work. > > It seems that one can only extract pixel values from all 3 planes > altogether.....If so, why? > > So the question comes down to: How to extract/change a single pixel value > of a single plane in SciCV ? > > Thank you, > > Philipp > >
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