Title :
Global and local transformation function mixture for image contrast enhancement
Author :
Kabir, Md Hasanul ; Abdullah-Al-Wadud, M. ; Chae, Oksam
Author_Institution :
Kyung Hee Univ., Kyung Hee
Abstract :
In this paper we present an effective method for image contrast enhancement with a mapping function that improves both the brightness and fine details of the input image. With the global transformation function it combines an intensity-pair distribution based expansion function from each image block to control the enhancement of image details, which the global transformation function alone may fail to improve. Contribution from the global transformation function preserves the overall image brightness and contrast stretch.
Keywords :
image enhancement; transforms; expansion function; global transformation function; image block; image brightness; image contrast enhancement; intensity-pair distribution; local transformation function; mapping function; Brightness; Dynamic range; Entropy; Face; Helium; Histograms; Image processing; Pixel; Scalability; Upper bound;
Conference_Titel :
Consumer Electronics, 2009. ICCE '09. Digest of Technical Papers International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-4701-5
Electronic_ISBN :
978-1-4244-2559-4
DOI :
10.1109/ICCE.2009.5012353
