Find angle of rotation needed to align image

Hi there,

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I&#;ve discovered the problem with my image stitching is that the images are slightly rotated in each image and if I rotate these images then the stitching works fine. However, at first I was having to guesstimate the amount of rotation needed for each pair of images, rotate, see if the rotation looks good and attempt to stitch. If the stitched image still looks blurred rotate again and repeat (even a rotation of 0.2 can give a less blurred image). Now I am drawing lines between two landmarks on the images, measuring these angles and then getting the lines roughly equal but this still takes time. There are plugins that do the rotation automatically (e.g. align image by line ROI) but I can&#;t see the rotation used to align the images.

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Is there a way to see how much the image was rotated in one of these align tools/plugins? I can&#;t just just the align plugins as they tend to crop the images which is not what I want as I am making a bigger image out of component images. The image also have 6 channels so I prefer to rotate and then stitch either pairwise or gridwise so these channels don&#;t get blended together.

Thanks for any help

If you are looking for more details, kindly visit Dove Prism for Image Rotation.