how to segment form?

I have a form table that contains characters. how to extract these characters?

[Image Analyst]

You forgot to attach your table or image, so there's nothing we can suggest (yet).

[lamghari]

sorry attached image

[Thorsten]

What do you mean by "extract these characters"? Select the images of the characters or do an OCR (optical character recognition) or something else?

[lamghari]

select the images of the characters

Answer 1

[Image Analyst]

First I'd sum the image vertically and horizontally and look for the rows and columns where the grid lines are. Then call imcrop.

[rows, columns, numberOfColorChannels) = size(grayImage);
horizontalProfile = sum(grayImage, 1);
verticalProfile = sum(grayImage, 2);
binaryHoriz = horizontalProfile < someNumber;

and so on. Give it a try.

[lamghari]

How to calculate someNumber?

[Image Analyst]

Plot the profiles and you'll be able to tell what the number is. It might be like half the max value or something.

[lamghari]

ok thank you very much