講演抄録/キーワード |
講演名 |
2015-08-04 10:00
Design Space Exploration of Computational Photography Accelerator ○Yuttakon Yuttakonkit・Tran Thi Hong・Shinya Takamaeda・Yasuhiko Nakashima(NAIST) CPSY2015-17 |
抄録 |
(和) |
(まだ登録されていません) |
(英) |
Computational photography applications use image processing to extract quality improvement or addi- tional features. Instances of current implementation are refocusing and post-made depth of field for smartphones, optical manufacturing inspection for industrial. One key property of these applications is obtaining depth of objects from still image. Instead of using multiple cameras, a single 4D image that consists of collated micro images can directly extract the depth of objects by differentiating amongst multiple micro images. Though calculations inside a micro image is capable for parallelism but the far distance between comparison pair’s pixel on neighbor micro image is drastically obstruction. This Sparse Stencil memory access is the most hotspot for 4D image application’s algorithm. Recent mobile device especially smartphone also try to add 4D like’s features but obstructed with pro- cessing performance and also power consumption due to limited battery, thus either quality or resolution is too low. To overcome this, we proposed an accelerator, which operate along side with the main mobile processor. The appli- cations’s algorithm are analyzed, then we use conventional multicore processor simulator to conduct design space exploration. Result shows that, speed of cache is dominated the performance while size of cache is least effective. ROB size and amount of cores is the second priority. Furthermore by comparing the simulation with real hardware result, we found that not only parameters tuning on subject architectures but detail on internal architecture design is also essential to improve both performance and power efficiency. |
キーワード |
(和) |
/ / / / / / / |
(英) |
Architecture design / System design / Computational photography / Stencil application / Mobile Processor / / / |
文献情報 |
信学技報, vol. 115, no. 174, CPSY2015-17, pp. 7-12, 2015年8月. |
資料番号 |
CPSY2015-17 |
発行日 |
2015-07-28 (CPSY) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
CPSY2015-17 |
|