Help Stitching Photos Together

I am trying to stitch 2 photos together using the reference code found here almost verbatim http://www.mathworks.com/help/vision/examples/feature-based-panoramic-image-stitching.html

Some differences:

My photos are already greyscale, so I skip line:

grayImage = rgb2gray(I);

and just have:

grayImage = I;

I have only 2 photos of identical size (in pixels), so I am retaining the transformation of the second image relative to the first image, i.e. totally skipping the code in the example that "invert[s] the transform for the center image and apply[s] that transform to all the others." This means that tforms(1) remains an identity matrix as created by the initializing statement:

     tforms(buildingScene.Count) = projective2d(eye(3));

I don't get any errors until almost the last line:

Error using AlphaBlender/step
The Image 1 and Image 2 inputs must have the same number of dimensions.

Error in stitchCntl (line xxx)
panorama = step(blender, panorama, warpedImage, warpedImage(:,:,1));

I have goggled the error message with no hits, and am at a loss as to how to proceed. Any help is greatly appreciated.

Thank you to all!

Answer 1

[Andreas Grothues]

OK, I have something...

I changed....

% Initialize the "empty" panorama.
panorama = zeros([height width 3], 'like', I)

To...

panorama = zeros([height width], 'like', I)

I now get two stitched-together photos. I think this was because I have grayscale photos, not color photos as in the example.

Unfortunatley, matchFeatures() did a horrible job finding common features and so the splice is terrible, but I guess that is a different story entirely.

Answer 2

[Congwei Ni]

Can i ask how do you stitch two images using this method?

[John D'Errico]

Please learn to use comments to make a comment.

[Ahmed Sewify]

Have you figured it out, yet? I'm also trying to stitch 2 images together.