1. Image Coloring

2. Halftone Halftone is the reprographic technique that simulates continuous tone imagery through the use of dots, varying either in size, in shape or in spacing.

3. Examples of Color Halftoning with CMYK Separations

4. The first printed photo using a halftone ( December 2, 1873)

5. Dithering Dithering is a technique used in computer graphics to create the illusion of color depth in images with a limited color palette (color quantization)

6. Illusion of Dithering

7. 256 color dithering with Irfan View

8. Original Image in Detail

9. Original image using the web-safe color palette with no dithering applied

10. Original image using the web-safe color palette with Floyd–Steinberg dithering

11. Original image has been reduced to a 256-color optimized palette with Floyd–Steinberg dithering

12. Depth is reduced to a 16-color optimized palette in this image, with no dithering

13. This image uses 16-color optimized palette with dithering

14. Original

15. Threshold

16. Random

17. Halftone

18. Ordered (Bayer)

19. Ordered (Void-and-cluster)

23. HSV Color Cylinder

24. YCrCb Sampling Format YCrCb J:a:b J: horizontal sampling reference (width of the conceptual region). Usually and in this case: 4. a: number of chrominance samples (Cr, Cb) in the first row of J pixels b: number of (additional) chrominance samples (Cr, Cb) in the second row of J pixels YCrCb (4:4:4, 4:2:2, 4:2:0, 4:1:1)

25. YCrCb Sampling Format 4:2:0 4:4:4 4:2:2 4:1:1