Skeptic
Posts:
68
Registered:
2/9/08
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Re: How to calculate the angle between two images?
Posted:
Apr 3, 2009 10:20 AM
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Dave Robinson wrote a nice algorithm:
> One method that I found for easily determining the relative
> angle of 'twist' between a known reference image and a rotated image was accomplished very reliably even for arbitrary images.
>
[snip]
> Dave Robinson
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Dave:
Nice. Clever yet makes good intuitive sense. Does it still perform
well under stress conditions such as:
1. image contrasts don't match
2. rotations, such as 45 degrees, where some information is rotated
out and other new info is rotated in (think of an aerial photo rotated
45 degrees).
3. rotation is not about the center of the image.
-ImageAnalyst
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