Adaptable Image Processing Methods for Changing Ambient Illuminations

• Main Authors: Yang, Sun-Chen, 楊孫成
• Other Authors: Chen, Jiann-Jone
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/85832498622400668091

碩士 === 國立臺灣科技大學 === 電機工程系 === 94 === Recently, the technologies of digital FPD (Flat Panel Display) have been rapidly developed. In addition, people start to pay attention to FPD’s ergonomic performance. The technologies of digital FPD consist of not only how to improve the image quality but also the adaptation ability to changing environmental illumination for better subjective performance. The later is much more important especially when the digital FPD is widely used in handheld devices now. To provide better visualization effect for digital FPD, the back light brightness should be proportional to the environmental illumination. We propose to utilize the “gamma correction curve” and “brightness preserving bi-histogram equalization” to set up visualization model for different environmental illuminations. Two sets of parameters have been determined based on the mean opinion score (MOS) evaluation process. Simulations show that the visualization model can help to improve the subjective performance.