灌裝斑點（形狀）基於區域

Question

我有，我已經嘗試標籤的圖像上的一些形狀根據使用提供給我一個解決方案的地區獨特的顏色：

stats = regionprops(BW,'Area') 
stats2 = regionprops(BW,'Centroid') 

figure,imshow(BW) 
for k = 1:numel(stats) 
    xy = stats2(k).Centroid 
    if (stats(k).Area>TH) 
     text(xy(1),xy(2),'L') %// Large Shape 
    else 
     text(xy(1),xy(2),'S') %// Small Shape 
    end 
end 

但事實證明，形狀對於字母來說太小（即使我改變了字體，形狀也會太小），我想知道是否有一種方法可以進行閾值生成顏色代碼，即根據區域改變填充形狀？

Answer 1

看看這是鼓舞人心的足夠你 -

%// Input image. This one is chosen as it is available in MATLAB image library 
img = imread('coins.png'); 

%// Convert to binary image 
BW = im2bw(img,0.4); %// 0.4 as binary thresehold worked for this specific image 

%// Get area and pixel-list stats 
stats = regionprops(BW,'Area'); 
stats2 = regionprops(BW,'PixelIdxList'); 

s1 = struct2array(stats); 
[v1,v2,v3] = unique(s1); 
num_colors = numel(v1); 

%// Pixel values per channel for creating color codes 
pix_per_ch = linspace(0,255,ceil(power(num_colors,1/3))); 

%// Unique 3 color codes 
all_color_codes = allcomb(pix_per_ch,pix_per_ch,pix_per_ch); 
%// allcomb is a MATLAB File-exchange tool avaiialble at - 
%// http://www.mathworks.in/matlabcentral/fileexchange/10064-allcomb 

%// Unique 3 color codes for the number of shapes available 
color_codes = all_color_codes(randi(size(all_color_codes,1),num_colors,1),:); 

%// Sort these uniques colors based on their grayscale intensities 
[~,ind]=sort(rgb2gray(uint8(permute(color_codes,[1 3 2])))); 
sorted_color_codes = color_codes(ind,:); 

%// Pre-allocate for the ouput image 
out = uint8(255.*BW(:,:,ones(1,3))); 

%// Assign each shape a unique color based on their areas 
for k = 1:numel(stats) 
    ind1 = stats2(k).PixelIdxList; 
    indx = bsxfun(@plus,ind1,[0:2].*size(img,1)*size(img,2)); 
    color_code = sorted_color_codes(v3(k),:); 
    color_code_ext = color_code(ones(1,numel(ind1)),:); 
    out(indx) = color_code_ext; 
end 

%// Display input, output results 
figure, 
subplot(211),imshow(img), 
title('Input Image') 
subplot(212),imshow(out), 
title('Output Image (Brighter colors represent larger shapes)') 

輸出 -