如何緩衝像素的關聯像素值？

Question

我可以使用什麼方法來緩衝像素的相關像素值？例如，左側的圖像顯示的像素半徑值範圍爲0 - 5（注意「黑色」值爲0）的光柵圖像。右側的圖像顯示了我試圖根據這些像素值生成的緩衝區。每個堆棧交換策略，我還包括一個可重現數據的MATLAB腳本。

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% Generate a grid of 0s to begin with. 
m = zeros(300, 400, 'uint8'); 

% Generate 1000 random pixels. 
numRandom = 1000; 
linearIndices = randi(numel(m), 1, numRandom); 

% Assign a radius value of 1-5 for each pixel 
m(linearIndices) = randi(5, [numel(linearIndices) 1]); 

% Display it. 
image(m); 
colormap(hot); 

Answer 1

一種方法：

% Generate a grid of 0's to begin with. 
m = zeros(300, 400, 'uint8'); 

% Generate 1000 random pixels. 
numRandom = 9; 
linearIndices = randi(numel(m), 1, numRandom); 

% Assign a radius value of 1-5 for each pixel 
m(linearIndices) = randi(5, [numel(linearIndices) 1]); 



%% 
buffer = false(size(m)); 
for radius =1:5 % update to actual range 
    im_r = m==radius; 
    se = strel('disk',radius); 
    im_rb = imfilter(im_r, double(se.getnhood())); 

    buffer = buffer | im_rb; 
end 

imshowpair(m,buffer,'montage');