We can export camera information by "SynthExport.exe", including %     * Image ID
%     * Image ID
%     * Camera position X
%     * Camera position Y
%     * Camera position Z
%     * Camera rotation about X axis
%     * Camera rotation about Y axis
%     * Camera rotation about Z axis
%     * Image aspect ratio
%     * Focal length (relative to the size of the CCD)
%     * Radial lens distortion K1
%     * Radial lens distortion K2
How could I use this paraments to obtained the camera matrix? and also how to obtain the pictures without distortion with the help of k1 and K2?

Look up ImageMagick -distort Barrel "(distortion parameters)"
The only other alternative that I know of is to use OpenCV, but OpenCV tend to ignore color space, desaturate and decrease contrast of images.

Thanks

Hello 

Regarding Radial distortion (k1 and k2), they are really different from other radial distrtion recovered by Iwitness for example. K1 and K2 in iWitness for example are having 5 precision after zero, example(0.000002) but in Photosynth is only two precision after zero, example (0.002). Any one has got any idea why I see this difference.....