獲得形狀的框架上的二進制圖像MATLAB

Question

我有以下的二值圖像：

我試圖獲得最終是這樣的： 沒有人有解決它的想法？ 非常感謝！

Answer 1

對於這個問題，我們假設字母在黑色背景（0）上是白色的（1）。 （即，圖像的外側是黑色）

以下MATLAB腳本使用腐蝕，膨脹的組合工作，填充和AND/OR/NOT邏輯運算：

 %This script assumes the input image is a binary bitmap image 
    %Otherwise use: 
    %BW = logical(BW); after loading grayscale image with BW = imread(filename); 

    BW = imread('img.bmp'); %read in the image 
    figure 
    imshow(BW) %show original image 

    %for the outside edges 
    BW2 = imfill(BW, 'holes'); %fill holes in letters 
    BW3 = imerode(BW2, strel('disk',1)); 
    BW4 = BW2 & (~BW3); %outside boundary of letters (8 connected) 
    figure 
    imshow(BW4) %show outside edges 

    %for the inside edges 
    BW2 = imerode(BW3, strel('disk',1)); %erode filled letters again 
    BW3 = ~(BW & BW2); %logical AND operation of original image and doubly eroded filled letter image 
    BW2 = ~imfill(BW3,1); %fill image with white (1), starting at 1,1 leaves 
    BW3 = imfill(BW2, 'holes'); %fill inner holes 
    BW2 = BW3 & (~BW2); %logical operation to isolate inner holes 
    BW3 = imdilate(BW2,strel('disk',1))-BW2; %boundary of inner edges 

    BW2 = BW3 | BW4; %logical OR operation to obtain inside and outside edges 
    figure 
    imshow(BW2) %final image