MY(Naveen) IDEAS : crop image

Tuesday, February 23, 2016

Matlab-Cropping-binary-image-algorithm-and-program

Matlab

Program for Cropping Binary Image : Matlab Code

Objective of the Program:

Program takes a black and white image as input. It removes the black portion and gives the white portion of the image.

Input: Gray or binary image (for example consider the image below)

Output: Gray or binary image (as below)

MATLAB Code:



% read the input binary image 

img = imread('path of image');

% calculating size of the image 

[row col] = size(img);

% removing black portion on top side of the image 
  for i = 1:row
    if sum(img(i,:)) > 0
        top = i;
        break
    end
  end

% removing black portion on bottom side of the image 
  for i = row:(-1):1
    if sum(img(i,:)) > 0
        bottom = i;
        break
    end
  end

% removing black portion on left side of the image 
  for i = 1:col
    if sum(img(:,i)) > 0
        left = i;
        break
    end
  end

% removing black portion on right side of the image 
  for i = col:(-1):1
    if sum(img(:,i)) > 0
        right = i;
        break
    end
  end

% output image  
 output = img(top:bottom, left:right);

 imshow(output);

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Objective of the Program: Program takes a black and white image as input. It removes the black portion and gives the white portion of the image.

MY(Naveen) IDEAS

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