Color Deficiency Aid Process and Color Image Enhancement
Date Issued
2005
Date
2005
Author(s)
Chiu, Yi-Mei
DOI
en-US
Abstract
Approximately one man out of twelve has some degree of color deficiency. There is no cure for color vision deficiency. Though there are some techniques trying to help them distinguish color, such as tinted spectacles and monocular contact lenses, however, these devices might boil down to further serious situation, such as impaired visual acuity, visual distortions, and diminishing the depth perception. However, vision is the one that we rely on most to access information. Nowadays, for the development of technology, people acquire quite many facts from multimedia. Hence, color also play a role in conveying information and hence obstruct some color deficient people to some degree. Hence, this thesis offers assistance processes to help color deficient people distinguish colors. This assistance algorithm is based on utilizing the color gamut seen by color deficient people. The effect of the proposed assistance process is proved by examine the enhanced image through the color deficient vision simulation in [4]. Besides, other assistance processes are compared with the proposed one.
In the later of the thesis, we focus on contrast enhancement on ordinary images. We proposed the saturation enhancement methods without hue and luminance changes in CIE xyY and CIE L*u*v*. The main contribution of this part is that we take the dependence of luminance and chromaticity into consideration. Hence, the image artifacts and color distortion, which other saturation enhancement would results in, are not produced through the proposed saturation enhancement. Furthermore, the proposed saturation enhancement methods are quite useful and could be applied to many fields, such as gamut calculation, and clipping after luminance processing. We also proposed a background adjustment approach cooperates with the proposed saturation enhancement methods to virtually restore the ancient Chinese paintings.
Subjects
色盲
色盲模擬
彩色影像加強
色域計算
Color Deficiency
Dichromat Simulation
Saturation Enhancemet
Gamut Calculation
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-94-R92942022-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):751585907240846e0a91d27b1102f930