用於即時高動態範圍視訊之梯度域暨全域色調轉換器的設計與實現

Design and Implementation of Gradient Domain Compression and Photographic Tone Mapping for Real-Time High Dynamic Range Video

黃致學(Chih-Hsieh Huang)

指導教授 ： 邱瀞德

國立清華大學/電機資訊學院/資訊工程學系/碩士(2007年)

https://doi.org/10.6843/NTHU.2007.00004

摘要

高動態範圍影像及視訊是近年來迅速發展的科技。它能比傳統的影像容納更高的色彩對比，所以能最忠實地呈現出場景的真實面貌。但由於格式與傳統顯示器及其它舊有設備無法相容，是故我們需要轉換高動態範圍成為傳統之低動態範圍格式，此即稱為調性轉換。
　　在這一篇論文裡，我們設計以及實現了一個整合了兩種調性轉換的演算法，並實際合成、佈局和模擬。模擬結果顯示在台灣積體電路之.13 μm製程下，可以在100MHz的速度進行操作，同時其面積為14.059平分公釐，消耗177.147毫瓦特之功率。同時對硬體計做了大幅度的改善以及最佳化。

關鍵字

高動態範圍影像 ； 色調對應 ； 即時區塊性梯度域高動態範圍壓縮演算法 ； 全域高動態範圍演算法

並列摘要

HDR (High Dynamic Range) is a technology that can sample and restore the colors of our real world extremely loyally, but cannot be displayed or used on conventional devices without properly reproducing. As a result, there are several tone mapping methods proposed to transform HDR to common formats so that we could utilize HDR more widely.
In this thesis, we design an integrated hardware architecture to perform two different real-time High Dynamic Range Compression methods (Gradient Domain Compression and Global Tone Mapping) in one chip. The speed of our chip is improved from 50 MHz to 100 MHz in TSMC .13 μm technology, and it has an area of 14.059 mm2 with consuming a power of 177.147 mW. In the meantime, the critical paths and internal architecture in those two designs are also improved and well-optimized.

並列關鍵字

Gradient Domain Compression ； Photographic Tone Mapping ； High Dynamic Range ； HDR ； Low Dynamic Range ； Tone Mapping ； Tone Reproduction ； Global Tone Mapping ； ASIC ； Application-specific integrated circuit

參考文獻

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[9] S.N. Wansundara, ”Solving The Discrete Poisson Equation Using the Fast Fourier Transform Technique”, Memorial University of Newfoundland ,2002.