matlab 获得corner点（未完待续）

clear;
close all;
clc;
I = imread('d.png');
G = rgb2gray(I); %灰度化
level = graythresh(I); %设定阈值
BW = im2bw(I,level); %二值化
BW_edge = edge(BW,'canny');
dim =size(BW);

i = floor(dim(1)/2);
for m = 1:dim(2)
    if BW_edge(i,m)==1
        dimen = [i,m];
        break;
    end
end

contour = bwtraceboundary(BW_edge,dimen,'N');
background = zeros(size(BW));
%imshow(background);
%hold on;
%plot(contour(:,2),contour(:,1),'g','LineWidth',1);
sizeOfContour = size(contour);
for m=1:sizeOfContour(1)
    coordinate = contour(m,:);
    x=coordinate(1); y=coordinate(2);
    background(x,y) = 1;
end
imshow(background);






clear;
close all;
clc;
I = imread('d.png');
G = rgb2gray(I); %灰度化
level = graythresh(I); %设定阈值
BW = im2bw(I,level); %二值化
BW_edge = edge(BW,'canny');
dim =size(BW);

i = floor(dim(1)/2);
for m = 1:dim(2)
    if BW_edge(i,m)==1
        dimen = [i,m];
        break;
    end
end

contour = bwtraceboundary(BW_edge,dimen,'N');
background = zeros(size(BW));
%imshow(background);
%hold on;
%plot(contour(:,2),contour(:,1),'g','LineWidth',1);
sizeOfContour = size(contour);
for m=1:sizeOfContour(1)
    coordinate = contour(m,:);
    x=coordinate(1); y=coordinate(2);
    background(x,y) = 1;
end
imshow(background);