How to make stitching faster?

[fdelu]

Hello!

I am currently using the Stitcher to stitch 15 OpenCV images of a fixed-position camera that pans from left to right. All the images are 1920x1080 images captured with OpenCV's VideoCapture. I am looking for advice/guidance on how to speed up the stitching. Is there anything I can look into to speed it up?

Some additional information:

• I am using the Stitcher with the following parameters: Stitcher(confidence_threshold=0, range_width=1) (since all images are guaranteed to be ordered left to right)
• I've tried to resize the images to make them 25% smaller, doesn't seem to have helped a lot
• All the images are in memory, I am not saving anything to disk nor encoding any of the images but the final panorama
• Stitching is taking about 2 minutes for the 15 images. The CPU I am using is not very fast unfortunately.

Is there something else I can try?

[lukasalexanderweber]

two things that come in my mind:

1. You could safe the homography that it's not reestimated every time: How to save homography matrix (for video) #148
2. You could reduze the final image size (final_megapix)