MATLAB: How to creat automatic cropping for braille text (image)

brailleimage processingImage Processing Toolbox

i have a image of braille scan, i want to creat automatic cropping for this image, what's tools in matlab that i can use ?

Best Answer

I'd first try imtophat() or imbothat() to emphasize the spots. Then it really depends on what area(s) of the image you want to crop, like each letter, each paragraph, the whole group of paragraphs or what???.

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MATLAB: Refining a Jagged “Skeletonized” Line (Image)

You need to increase the number of pixels in the image, like you did. If you do that the line will be smoother.

MATLAB: How to crop image with nonlinear cropping shape

Get the horizontal and vertical profiles using sum(), and get the top and bottom row and left and right column using find()

horizontalProfile = sum(binaryImage, 1);
verticalProfile = sum(binaryImage, 2);
topRow = find(verticalProfile, 1, 'first');
bottomRow = find(verticalProfile, 1, 'last');
leftColumn= find(horizontalProfile, 1, 'first');
rightColumn = find(horizontalProfile, 1, 'last');
croppedImage = binaryImage(topRow:bottomRow, leftColumn:rightColumn);

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MATLAB: Refining a Jagged “Skeletonized” Line (Image)

MATLAB: How to crop image with nonlinear cropping shape

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