improve rotated image.....

hello.. how to improve rotated image to become unrotated image. this is example of rotated image.

http://i1259.photobucket.com/albums/ii548/msaiful89/2.jpg

Answer 1

[Image Analyst]

Determine angle of rotation by finding squares. Then call imrotate().

[mohd]

how can i find the rotation at squares. and if the image does not have squares. what is point to find the angle rotation.

[Image Analyst]

Threshold to find dark regions, use regionprops, filter on size and perimeter^2/(4*pi*area) to detect squares of the right size. Then think a little bit about how to find angles. There are probably several ways, like maybe hough() or houghlines()???? Or use area of square and area of bounding box. Or use the corner() function. Try some. Experiment and have fun. Shouldn't be too hard.

[mohd]

ok thanks alot..:)