A Novel 3-D Color Histogram Equalization Method With Uniform 1-D Gray Scale Histogram

1. A Novel 3-D Color Histogram Equalization MethodWith Uniform 1-D Gray Scale Histogram Ji-Hee Han, Sejung Yang, and Byung-Uk Lee, Member, IEEE IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 20, NO. 2, FEBRUARY 2011

2. Outline INTRODUCTION REVIEW OF PREVIOUS WORK BASED UPON THE 3-D COLOR HISTOGRAM PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY EXPERIMENTS

3. Outline INTRODUCTION REVIEW OF PREVIOUS WORK BASED UPON THE 3-D COLOR HISTOGRAM PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY EXPERIMENTS

4. INTRODUCTION histogram equalization has become embedded in most consumer digital cameras The majority of color histogram equalization methods do not yield uniform histogram in gray scale This paper proposes a novel 3-D color histogram equalization method that produces uniform distribution in gray scale histogram

5. Outline INTRODUCTION REVIEW OF PREVIOUS WORK BASED UPON THE 3-D COLOR HISTOGRAM PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY EXPERIMENTS

6. REVIEW OF PREVIOUS WORK A. Gray Scale Histogram Equalization The pdfs of them are denoted as , and the corresponding cdfs are ,and intensity of the original input image as modified intensity of the resulting output image as L is the number of intensity levels

7. REVIEW OF PREVIOUS WORK B. Previous Methods Based upon 3-D Color Histogram Equalization Trahaniasand Venetsanopoulos[2] defined the cdf in RGB color space as

8. REVIEW OF PREVIOUS WORK The desired output cdf is given as:

9. REVIEW OF PREVIOUS WORK R, G, and B components are the same, i.e., The resulting cdf for this image is proportional to , i.e.,

10. REVIEW OF PREVIOUS WORK

11. REVIEW OF PREVIOUS WORK

12. REVIEW OF PREVIOUS WORK Menotti proposed to adopt an input cdf that multiplies each marginal cdfof three channels , i.e.,

13. REVIEW OF PREVIOUS WORK C. Generalization of Gray Scale Image Enhancement to Color Images Naikand Murthy [21] proposed a scheme to generalize any gray scale image processing to color images

14. Outline INTRODUCTION REVIEW OF PREVIOUS WORK BASED UPON THE 3-D COLOR HISTOGRAM PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY EXPERIMENTS

15. PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY Where is the input intensity Since the ideal output pdf is uniform over all values of n , the output cdfis Since , we obtain

16. PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY

17. PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY

18. Outline INTRODUCTION REVIEW OF PREVIOUS WORK BASED UPON THE 3-D COLOR HISTOGRAM PROPOSED METHOD: A CDF WITH AN ISO-LUMINANCE-PLANE BOUNDARY EXPERIMENTS

19. EXPERIMENTAL

20. EXPERIMENTAL

21. EXPERIMENTAL

22. EXPERIMENTAL

23. EXPERIMENTAL

24. EXPERIMENTAL

25. EXPERIMENTAL

26. EXPERIMENTAL

27. EXPERIMENTAL

28. Thank you