Image coloring
Download
1 / 27

Image Coloring - PowerPoint PPT Presentation


  • 143 Views
  • Uploaded on

Image Coloring. 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. Examples of Color Halftoning with CMYK Separations.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Image Coloring' - chaz


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Halftone
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.


Examples of color halftoning with cmyk separations
Examples of Color Halftoning with CMYK Separations


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


Dithering
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)







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




Original
Original image, with no dithering


Threshold
Threshold image, with no dithering


Random
Random image, with no dithering


Halftone1
Halftone image, with no dithering


Ordered bayer
Ordered (Bayer) image, with no dithering


Ordered void and cluster
Ordered (Void-and-cluster) image, with no dithering


Hsv color cylinder
HSV Color Cylinder image, with no dithering


Ycrcb sampling format
YCrCb Sampling Format image, with no dithering

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)


Ycrcb sampling format1
YCrCb Sampling Format image, with no dithering

4:4:4

4:2:2

4:2:0

4:1:1


ad