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Image processing album


Godlord
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The course I have on image processing has been keeping me busy lately, so I thought that I might as well post some results. In this thread I will include both the original and the processed images, as well as a brief description of the process. These images have been processed by scripts I have written in Python using numpy and scipy, those will however not be included for the while being. If you do feel like experimenting with image processing, but don't have suffiencent knowledge about linear and/or geometric algebra, then OpenCV is a pretty good solution. I do not recommend Python, however, unless you want to programme the exact mathematical process (which is why I have been using Python, numpy and scipy), considering Python is slow (it usually takes a few seconds to warp most of these images).

**Original.**

![](http://sphotos-e.ak.fbcdn.net/hphotos-ak-ash4/422908_10151060465338616_1429435508_n.jpg)

**Result upon applying an affine transformation.**

![](http://a3.sphotos.ak.fbcdn.net/hphotos-ak-ash4/422908_10151060465348616_322444515_n.jpg)

**Original.**

![](http://a8.sphotos.ak.fbcdn.net/hphotos-ak-ash4/422908_10151060465353616_514999111_n.jpg)

**Result upon applying a projective transformation using the four corner points of the poster. I have also written a similar script that finds the homography instead, and uses that to warp the image, and the result is the same.**

![](http://sphotos-f.ak.fbcdn.net/hphotos-ak-ash4/422908_10151060465358616_1051484653_n.jpg)

**Original. The effect is caused by the lens, and is usually known as radial distortion.**

![](http://sphotos-d.ak.fbcdn.net/hphotos-ak-snc7/422908_10151060465363616_1992972364_n.jpg)

**Result upon applying a radial transformation. The result is close to that of when the image is taken with a proper lens, or a pin-hole camera, but some artifacts will remain visible.**

![](http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc6/207949_10151060466193616_621511988_n.jpg)

**Original.**

![](http://sphotos-d.ak.fbcdn.net/hphotos-ak-ash4/377972_10150430400988616_597508035_n.jpg)

**Result upon applying the same radial transformation, albeit with different parameters.**

![](http://a3.sphotos.ak.fbcdn.net/hphotos-ak-snc6/207949_10151060466198616_302215228_n.jpg)

Yours faithfully

S.J.R. van Schaik.
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  • 1 year later...
Thanks for your nice sharing. I am a green hand on
[image processing](http://www.yiigo.com/guides/vbnet/how-to-process-image.shtml) . I will test some easy-operated toolkits and then study the infomation you offer. Good luck.

Best regards,

Arron
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