MATLAB: How to find the margin in an image of the text document

counting pixelscursiveedge detectionhandwritingimage analysisimage processingImage Processing Toolboxocr

I have a sample of handwriting. And I want to find the left, right and top margin[i.e., the space between the starting of the writing and the edge of the paper to the left is the left margin]. Please help me with the code.

Best Answer

Did you try to threshold and then use regionprops(L, 'BoundingBox')?

If the shadows on the paper are a problem then call edge() first and then get the bounding box from the edge image.

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MATLAB: Filling objects that share a border

Binarize and Invert the image: binaryImage = grayImage <128
Call imfill(binaryImage, 'holes')
call regionprops(binaryImage, 'BoundingBox') asking for bounding box
Look at the 4 sides of all the bounding boxes looking for any objects that share any bounding box side coordinate.

Give it a shot.

MATLAB: Auto Crop the image

I understand that you would like to crop the rectangular object from the image automatically. I hope the following code would help you do the same

% Read the image
grayImage = imread(filename);
% Display the image.
imshow(grayImage);
S = regionprops(grayImage,'BoundingBox','Area');
[MaxArea,MaxIndex] = max(vertcat(S.Area));
imshow(grayImage,'InitialMagnification',20)
%// Highlight the required object
hold on
rectangle('Position',S(MaxIndex).BoundingBox,'LineWidth',2,'EdgeColor','y')
Length = S(MaxIndex).BoundingBox(3);
Height = S(MaxIndex).BoundingBox(4);
% Cropping the image
% Get all rows and columns where the image is nonzero
[nonZeroRows,nonZeroColumns] = find(grayImage);
% Get the cropping parameters
topRow = min(nonZeroRows(:));
bottomRow = max(nonZeroRows(:));
leftColumn = min(nonZeroColumns(:));
rightColumn = max(nonZeroColumns(:));
% Extract a cropped image from the original.
croppedImage = grayImage(topRow:bottomRow, leftColumn:rightColumn);
% Display the original gray scale image.
figure
imshow(croppedImage, []);

Best Answer

Related Solutions

MATLAB: Filling objects that share a border

MATLAB: Auto Crop the image

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