2010-08-16 13:34
Hartley and Zisserman describe the homography calculation (or estimation) very well in their wonderful book "Multiple View Geometry in Computer Vision". However, they suggest solving the equation system by using a singular value decomposition (SVD). Another possible solution is to ...
2010-06-06 17:18
For an assignment, I had to create a short stop-motion movie. Before starting to search for good software to aid the process of taking something like 600 photos, I decided to write a simple application by myself. Actually, I wanted ...
2009-09-16 20:11
I continued working on my automatic panorama creation software. For now, I tried a completely different approach than bundle adjustment which provides already some interesting results (see image). Still a lot to do, though!


2009-08-30 14:05
2009-08-30 14:04
There is are three popular functions in Adobe® Photoshop® called Auto Contrast, Auto Tone and Auto Color. I have to admit that I haven't done any real research on how the underlying algorithms work, I rather played around a ...
2009-07-01 16:04
2009-05-13 16:34

Homographies are really useful. Often I need to take pictures of a projection onto a surface and usually this results in some perspective distortion. Using cvFindHomography, giving 'control points', a homography can be calculated and then the image can be ...
2009-05-05 00:12
Inverting an image in OpenCV is quite easy. No need to mess around with pointers. Actually, it can be done in a single line, with a single instruction:
1 cvXorS(input, cvScalar(255), output)