Particular Point detection in an image

I am doing a project on stereo vision and for that i need the 2D location of the 4 points in the below image:

I am confused as to how can I detect those points in Matlab. Is there any function for that ?

[KSSV]

YOu can detect those points manually using getpts or ginput.

[KALYAN ACHARJYA]

I dont know abour other test images, for this specific image, you can locate them using morphological image processing (segmentation).

Answer 1

[Mark Sherstan]

Assuming all your images are approximetly the same do the following:

I = imread('image.png');
J = im2bw(I);
K = bwpropfilt(J, 'Area', [115, 175]);

figure(1)
subplot(1,3,1); imshow(I)
subplot(1,3,2); imshow(J)
subplot(1,3,3); imshow(K)

stats = regionprops(K,'Centroid');
stats.Centroid % This will provide the 2D coordinates

[Karn Vadaliya]

How did you find the area from 115 to 175, I mean perfectly these values ?

[Mark Sherstan]

MATLAB has a great built in app. A guide can be found here.