如何切割部分并突出显示它

Question

假设我们从互联网上拍摄任何图像，然后将该图像中的某些部分复制或移动到该图像内的任何其他区域，图像应显示从部件复制/移动然后粘贴的位置。通过使用matlab。

a = imread('obama.jpg');
a = rgb2gray(a);
[x1 y1] = size(a);
b = uint8(imcrop(a, [170 110 200 150]));
[x2 y2] = size(b);
c = uint8(zeros(x1,y1));
for i = 1:x2
    for j = 1:y2
            c(i+169,j+109) = b(i,j);
    end
end
[x3 y3] = size(c)
subplot(1,3,1),imshow(a);
subplot(1,3,2),imshow(b);
subplot(1,3,3),imshow(c);

Answer 1

<强>代码

%%// Input data and params
a = imread('Lenna.png');
a = rgb2gray(a);

src_xy = [300,300]; %% Starting X-Y of the source from where the portion would be cut from
src_dims = [100 100]; %% Dimensions of the portion to be cut
tgt_xy = [200,200]; %%  Starting X-Y of the target to where the portion would be put into

%%// Get masks
msrc = false(size(a));
msrc(src_xy(1):src_xy(1)+src_dims(1)-1,src_xy(2):src_xy(2)+src_dims(2)-1)=true;

mtgt = false(size(a));
mtgt(tgt_xy(1):tgt_xy(1)+src_dims(1)-1,tgt_xy(2):tgt_xy(2)+src_dims(2)-1)=true;

%%// If you would like to have a cursor based cut, explore ROIPOLY, GINPUT - e.g. - mask1 = roipoly(a)
mask1 = msrc;
a2 = double(a);

%%// Get crop-mask boundary and dilate it a bit to show it as the "frame" on the original image
a2(imdilate(edge(mask1,'sobel'),strel('disk',2))) = 0;
a2 = uint8(a2);

%%// Display original image with cropped portion being highlighted
figure,imshow(a2);title('Cropped portion highlighted')

figure,imshow(a);title('Original Image')

figure,imshow(mask1);title('Mask that was cropped')

img1 = uint8(bsxfun(@times,double(a),mask1));
figure,imshow(img1);title('Masked portion of image')

%%// Get and display original image with cropped portion being overlayed at the target coordinates
a_final = a;
a_final(mtgt) = a(msrc);
figure,imshow(uint8(a_final));title('Original image with the cut portion being overlayed')

<强>输出

请注意，要使用RGB图像，您需要使用上述代码进行修补。