i want to add rows and columns to a binary image

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Raghu Rao 2017-2-21

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评论： Walter Roberson 2017-2-22

Hi, am working on words i want to add rows and columns to a binary image based on threshold values and also add nodes based on center of mass. please help me and i have attached an images for your refernces

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Raghu Rao 2017-2-22

example.jpg

Thank you Mr.Walter Roberson i have inserted row and columns to the binary image i get the image in grid view in this i want to find foreground pixel in each segments in the image {example.jpg}

Walter Roberson 2017-2-22

I need you to say clearly that you want to overwrite parts of the binary image, or that you want to conceptually break the image up into parts without actually changing the image.

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回答（1 个）

Image Analyst 2017-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/326216-i-want-to-add-rows-and-columns-to-a-binary-image#answer_255763

You can use padarray() to add any number of rows or columns to any side.

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Image Analyst 2017-2-22

在 MATLAB Online 中打开

bw = ones(3, 5)
% Add one row to the top, 2 rows to the bottom, 
% 3 columns to the left, and 4 columns to the right
bw2 = padarray(bw, [1, 3]);
bw2(6,12) = 0

And get this:

bw =
   1     1     1     1
   1     1     1     1
   1     1     1     1
bw2 =
   0     0     0     0     0     0     0     0     0     0     0
   0     0     1     1     1     1     1     0     0     0     0
   0     0     1     1     1     1     1     0     0     0     0
   0     0     1     1     1     1     1     0     0     0     0
   0     0     0     0     0     0     0     0     0     0     0
   0     0     0     0     0     0     0     0     0     0     0