CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION FOR RETINAL IMAGE

Abstract

In the field of the medical science, Engineering plays the major role in the part of diagnose the
diseases and rectify the problem occur in human body. Mostly affected part in the human eye is
Retina and many of the diseases acquired there. May it leads to blindness in eye. Now a days many of
techniques used to diagnosis the problem especially fundus photography used for taking photographs
the rear of an eye. But it has some of shortcomings such as blurring image, very low contrast and
uneven luminescence. To overcome this problem by using Enhancement technique and colour images
learned theoretically through generalized setup. Whenever RGB colour space changed to other colour
spaces such as LHS, HSI, YIQ, etc., At this stage the gamut problem is arises. To rectify the gamut
problem using enhancement technique subsequently followed by adaptive gamma correction. Through
this process we can achieve the equalized enhancement of all range of pixels in a colour Image.