Color slicing Highlighting a specific range of colors
- Slides: 20
Color slicing Highlighting a specific range of colors in an image Basic idea is : – Display the colors of interest so that they stand out from the background. – To use the region defined by the colors as mask for further processing. If the colors of interest are enclosed by a cube of width W and centered at (a 1, a 2, …. , an), the transformation is given by: 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 1
Color slicing If the colors of interest are enclosed by a sphere of radius R 0 and centered at (a 1, a 2, …. , an), the transformation is given by: These transformation functions highlight the colors of interest only with gray background for all other colors. 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 2
Color slicing 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 3
Color transformations: Toner corrections 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 4
Color transformations: Toner corrections 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 5
Color transformations: Color balancing 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 6
Color transformations: Color balancing 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 7
Histogram processing for color images 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 8
Test image 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 9
Test image Hue 11/1/2020 Saturation Intensity COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 10
Color image smoothing: averaging 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 11
Color image sharpening: Laplacian 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 12
Noise in color images: RGB 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 13
Noise in color images: HSI 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 14
Example: Noise induced in RGB and shown in HSI 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 15
Color image segmentation on HSI color space Hue Original image Intensity Saturation 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 16
Color image segmentation on HSI color space Saturation mask Hue*mask Histogram of Hue*mask Segmented image 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 17
Color image segmentation on RGB color space 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 18
Color image segmentation on RGB color space 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 19
Color Edge Detection & Color Image Compression § Reading Assignment 11/1/2020 COMSATS IIT, Lahore -- Digital Image Processing -- CSC 331 20
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