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read_raw *.raw it will output out_%06_r1.pgm , out_%06d_g1.pgm , out_%06_g2.pgm , out_%06_b1.pgm .

this is a single image of saturn . I took 250 images with 200ms shutter time . I used modified binoculars with one of the eye-pieces replaced by the raspi pi hq camera .

select_star -ref out_000000_g1.pgm select a point with the left mouse button . now there is a rectangle . you cam change the size with plus or minus on the numpad . press r to register the images . it will output out_000000_register_g1.txt this contains the positions and the difference of the sum images in frequency domain ( absolute values ) you can also display the image with a different blacklevel . select some region and press b to make the image brighter or darker press plus or minus ( not numpad )

compute a larger image from many low resolution images

I used "drizzle -zoom 4 -square 2 register_g1.txt" to create this image

then I created a point spread function from a moon of saturn using select_star . the next image was created with cg_deconvol -lambda 0.5 -loops 50 -psf_pgm -o saturn_g_zoom4.pgm saturn_drizzled_g_zoom4.pgm . it was computed with the conjugate gradient algorithm .

Here I multiplied the matrix with the transposed matrix . and the equation system is A^TAx = A^T*b . it is better when the convolution kernel is not symmetric but has slower convergence .

ed65b.png)

this algorithm works also if the matrix is not symmetric . the convergence is faster