The following code snippet will allow you to automatically select the region you want to remove by double-clicking the region and then remove the extra section.
img = imread('king.png'); % assuming king.png is the original image called 2.png
figure;
subplot(3,1,1)
imshow(img)
t = title('Double-Click on the region you want to remove!',...
'fontsize',12,'color','r');
h = impoint;
pos = round(h.getPosition);
rgbIndices = rgb2ind(img,5);
SE = strel('Disk',1,4);
for ii = 0:4
thisMask = ismember(rgbIndices,ii);
thisMask = imfill(thisMask,'holes');
thisMask = imopen(thisMask, SE);
thisMask = bwareaopen(thisMask,100);
[y,x] = find(thisMask);
if all(ismember(pos,[x,y]))
maskInd = ii;
break
end
end
subplot(3,1,2)
imshow(thisMask)
%
subplot(3,1,3)
outline = edge(rgb2gray(img),'Prewitt');
newOutline = outline & ~imdilate(thisMask,SE);
imshow(newOutline);
end
Copy this code and run this as a script with the image open and then select the section you want to remove.
