A Real-Time High-Quality HDR Imaging System

• Main Authors: Po-Chun Hung, 洪柏鈞
• Other Authors: Ching-Wei Yeh
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/73930147542666012005

碩士 === 國立中正大學 === 電機工程研究所 === 101 === High-Dynamic-Range(HDR) synthesis is popular in consumer products such as digital cameras and smart phones to generate high-quality still pictures. However, these techniques are difficult to be applied on video, owing to the strict timing constraints (i.e. 1/30 sec for a typical frame rate) posed on the images sources of various exposure values for HDR synthesis. We present a method to implement a real-time and high-quality High Dynamic Range (HDR) video synthesis from a dual-shot images application. Most previous algorithms for merging HDR images from a set of Low Dynamic Range (LDR) images, usually more than 5 LDR images, with different exposures times. To capture the widest dynamic range possible with the smallest number of sources, it is an important issue. In our method, two images of the scene are taken with different exposure time by using dual-shot system, then we provide an exposure-adaptive concept to overcome some problem which caused by lack of sources. Exposure-adaptive virtual frame to solve the color-continuity problem, and exposure-adaptive source enhancement to solve the lack of detail information. The proposed architecture enables a high-quality and real-time HDR video flow for a full resolution at 60 frames per second.