Experimental results

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Transcript Experimental results

Electrical Engineering Department of National Cheng Kung University

期末Demo報告

Cross-based

2012/08/13

指導教授：詹寶珠教授報告者：王邦威

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Flow chart Method Implement on GPU Experimental results

Outline

Smart Media & Intelligent Living Excellence Lab.

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Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Introduction

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Electrical Engineering Department of National Cheng Kung University

Local base algorithm

L R y P(Lx,Ly) Disparity= Lx-Rx

Smart Media & Intelligent Living Excellence Lab.

P’(Rx,Ry) 4

Electrical Engineering Department of National Cheng Kung University

Flow chart

Support region construction Matching cost Cost aggregation Winner-take-all

Smart Media & Intelligent Living Excellence Lab.

Post-processing 5

Electrical Engineering Department of National Cheng Kung University

Cross-based local support region construction

Two constraints • L • d • 2

Smart Media & Intelligent Living Excellence Lab.

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Electrical Engineering Department of National Cheng Kung University

右圖

Locally adaptive matching cost aggregation

Matching cost • • C AD : Ccensus : Hamming distance of the two strings that stand for p and pd R. Zabih and J. Woodfill , “Non-parametric local transforms for computing visual correspondence,” in

Proc. ECCV, 1994,

pp. 151 –158.

String 2 7

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Locally adaptive matching cost aggregation

Cost aggregation • d Winner-take-all • f

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Left/right consistency check

We apply occlusion treatment via left/right consistency checking to check the condition .

Then we fill in the disparity for invalidated pixels. For an invalidated pixel , we search its closest valid pixel to the left and to the right.

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Implement on GPU

整合 CUDA 和 Open CV • 建一個專案，將含有 cuda 的程式碼部分包成一個 Dll 檔 • 對主函式和含有 Open CV 的程式碼另外建一個專案，寫在 Cpp 檔 • 在利用到 GPU 就呼叫 Dll 檔 Host Device CPP 檔 ( 主程式且包含呼叫 Open CV 程式片段 ) DLL 檔 ( 包含呼叫 GPU 程式片段 ) GPU (kernel function)

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University

Implement on GPU

Number of threads : width Number of blocks : height Width One block Height

Smart Media & Intelligent Living Excellence Lab.

Electrical Engineering Department of National Cheng Kung University