1. Grid Pictures Modification

2. Geometrical Modifications Clip – Rectangular – Other shapes Rotate – Left, Right – 180 degrees – Flip

3. warping

6. Morphing

7. Resolution modification Resolution / number of pixels /dimensions of picture Resolution Decreasing (average color of pixels) Resolution increasing - copying of pixels - dithering

8. Color depth decreasing Rounding of colors Establishing of color palette Half toning Dithering

9. Half Toning Half tone matrix – example 012315 84117 214113 10695

10. Floyd Steinberg dithering 7/16 3/165/16 1/16

11. Pixel color correction Color correction Saturation correction Brightness correction – Simple brightness correction – Contrast correction – Gamma correction

12. Saturation S

13. Saturation correction S

14. Brightness Light

15. Brightness histogramm K W

16. Color brightness Y = 0,299R + 0,587G + 0.114B

17. Simple brightness correction Original br New br

18. Simple brightness decreasing Original br New br

19. Contrast decreasing Original br New br

20. Contrast increasing Original br New br

21. Gamma correction of brightness Original br New br

22. Gamma function Tedy Y = 255 * (x/255) 1/γ Y = x 1/γ Y = y min + (y max -y min )*(x/x max ) 1/γ

23. Gamma correction Original bright nessOn γ=0,5γ=2,2 000000 100,0392160,0015380,3921570,22943758,50645 200,0784310,0061511,5686270,31440980,17437 600,2352940,05536314,117650,518046132,1018 1280,5019610,25196564,250980,731039186,4151 2000,7843140,615148156,86270,895449228,3395 25511 1