How to segment a paragraph into lines and words?

[madhan ravi]

upload it as a text instead of picture

[SUBHAM KUMAR SAHOO]

I have to do the segmentation on this image file. Is it not possible?

Answer 1

[Guillaume]

Of course it's possible to segment the file. It's fairly trivial as well. Just close the image (if you're working with white text on black background which you should be, or open if you're working with black text on white background) and get the bounding box of the resulting objects in the image:

[rawimage, map] = imread('119.jpeg.png');    %for some reason the source image is indexed
greyimage = ind2gray(rawimage, map);         %convert to greyscale
bwimage = ~imbinarize(greyimage);            %for processing, binarise and invert so text is white on black background
joinedimage = imclose(bwimage, strel('square', 5));  %experiment with different structuring elements. This one works fine with your image
props = regionprops(joinedimage, 'BoundingBox');  %get bounding box of the objects

figure;
imshow(greyimage);     %display image
arrayfun(@(prop) rectangle('Position', prop.BoundingBox, 'EdgeColor', 'red'), props);  %and bounding boxes

[SUBHAM KUMAR SAHOO]

Thank you so much sir. No error is there, but the red line boundary is not coming when i run this code.

[Guillaume]

Clearly, it works for me, and I can't see why it wouldn't work for you.

Which version of matlab are you using?

What is the output of

vertcat(props.BoundingBox)

[SUBHAM KUMAR SAHOO]

I am using matlab 2014a.

[SUBHAM KUMAR SAHOO]

vertcat(props.BoundingBox). It shows undefined variable "props".

[Guillaume]

props should be defined after you've run my code. It's the output of regionprops. If it's not defined then an error must have occured earlier on. What is that error?

[SUBHAM KUMAR SAHOO]

No error is showing.

[SUBHAM KUMAR SAHOO]

Only the grey image is showing. there is no change in the o/p image after the last line coding.

[Guillaume]

vertcat(props.BoundingBox). It shows undefined variable "props".

No error is showing.

These two statements are contradictory. If you get an undefined variable "props" with vertcat(props.BoundingBox), then you'll get the same error with:

arrayfun(@(prop) rectangle('Position', prop.BoundingBox, 'EdgeColor', 'red'), props);  %and bounding boxes

, the line that draws the bounding boxes.