How to remove some detected edges from the edge map ?
2 views (last 30 days)
Show older comments
Using the prewitt edge detector I obtained the below output.
edge(grayImage,'Prewitt')
How can I remove edges of the blue circled area from this edge map. the original image I attached herewith.
0 Comments
Answers (1)
Gautham Sholingar
on 15 May 2017
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.
See Also
Categories
Find more on Computer Vision with Simulink in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!