Circle detection for eye
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Hi everyone, I am stuck with this for weeks. After I input a face image,
First: I perform the viola jones eye region detection by using the vision.CascadeObjectDetector
Second: I perform the Canny edge detection based on the eye region that was detected during the first stage.
a = imread('face.jpg');
imshow(a);
detector = vision.CascadeObjectDetector('EyePairSmall');
bbox = step(detector,a);
out = insertObjectAnnotation (a,'rectangle',bbox,'detection');
subplot(2,2,1),subimage(out);
outb = imcrop(out,bbox);
[hog1,visualization] = extractHOGFeatures(outb,'CellSize',[8 8]);
subplot(2,2,2),subimage(outb);
I = rgb2gray(outb);
BW = edge(I,'canny');
subplot(2,2,3);
imshow(BW);
After that, the image shown is like this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/248875/image.jpeg)
May I know how can I detect the iris (circle shape) based on the output of Canny edge detection ?
As the region has will only have two circles detected, how is it possible to be implemented ?
I read about the imfindcircle before, but it doesn't work out. Might need the community helps and some guidance on this.
Much appreciated. Thank you !
2 Commenti
Risposte (1)
Image Analyst
il 19 Nov 2019
Why are you using edge detection???
I'd first try thresholding the red channel, and if that is not robust enough, try imfindcircles().
4 Commenti
Image Analyst
il 19 Nov 2019
OK, what is the name of your image? What did you call the variable?
Can you attach the cropped eye image alone? (Use imwrite()).
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