Skeleton corner detection from a binary image based on a 3x3 region.
function call:
[out_img1]=vsg('CornerPoint',in_img1);
Arguments:
in_img1
input image, 3 channel RGB, 1 channel greyscale or binary image, or
DICOM image.
Description:
The CornerPoint function uses 3x3 masks of varying orientation to detect
corner points in a binary image. It detects 3×3 corner points and
replaces them by a single white pixel if the illustrated patterns occur
(Ref). Otherwise, the output pixel (shaded) is set to black. out_img1
- An image which has dimensions the same as the input image. The output
image displays the binary corner points.
Example:
img1 = openimage('A.bmp');
%color
image
[out_img1]=vsg('Threshold',img1,100);
figure;image(uint8(out_img1));
[out_img1]=vsg('CornerPoint',out_img1);
Notes:
For non-binary images or colour-planes/slices, corner points must have
exactly 0 and 255 values within the corner point detection kernel for
that point to be flagged as a corner.