Hi All,
I wish to detect the rectangle as shown below in the image. After that, I want to crop out what's only inside the rectangle part.
Anyone can teach me how?
First, I changed this coloured image into grayscale image then to binary image. Then, I tried using 'regionprops' with 'BoundingBox' to detect the presence of rectangle. However, the cropped image is not exactly the rectangle size.
PS. I do refer from someone else code.
props = regionprops(binaryImage, 'BoundingBox');
boundingBox = props.BoundingBox;
width = boundingBox(3);
height = boundingBox(4);
newHeight = height * (1 - 0.29)
xLeft = boundingBox(1);
yTop = boundingBox(2);
boundingBox2 = [xLeft, yTop + 0.29 * height, width, newHeight];
newGrayScaleImage = imcrop(grayImage, boundingBox2);
subplot(2, 3, 6);
imshow(newGrayScaleImage);
axis('on', 'image');
impixelinfo;
title('New Gray Scale Image', 'FontSize', fontSize);
Result:
