Joint Color Quantization and Dithering Techniques

Improvements for Color Dithering

This paper discusses possible extensions of error-diffusion dithering algorithms for color devices that give a more accurate reproduction of colors than previous algorithms. The main difference of the method presented here and others is that usually color channels are regarded separately, whereas we look at them together as one color value that is used to select the closest output color. This a...

Dithering and Quantization of audio and image

Color Image Quantization and Dithering Method Based on Human Visual System Characteristics

Recently, the use of color image data has been growing fast in the area of image processing.1–7 To express natural color in conventional low-cost color devices, the color image should be quantized for monitoring and dithered for printing. A video monitor displays a color image by modulating the intensity of three primary colors (red, green, and blue) at each pixel of the color image. In a digit...

Adaptive methods for dithering color images

Most color image printing and display devices do not have the capability of reproducing true color images. A common remedy is the use of dithering techniques that take advantage of the lower sensitivity of the eye to spatial resolution and exchange higher color resolution with lower spatial resolution. An adaptive error diffusion method for color images is presented. The error diffusion filter ...

Colour quantisation through dithering techniques

Most colour image printing and display devices do not have the capacity to deal with true-colours. To display the image anyway, they need to apply a quantisation method to reduce the number of colours present into the image. The research of this article is directed towards the study of a special kind of quantisation methods known as dithering techniques. Several quantisation techniques already ...