1. Edge Detection-E9506005 1 Edge Detection 指導教授：張顧耀學生姓名：李益璋 學號： E9506005

2. Edge Detection-E95060052 OUTLINE  Introduction  edge detection  Flow Chart  Result  Discussion

3. Edge Detection-E95060053 What is an edge?   Different color

4. Edge Detection-E95060054 What is an edge?   Different brightness

5. Edge Detection-E95060055 What is an edge?   Different texture

6. Edge Detection-E95060056 What is an edge?   Different surfaces

7. Edge Detection-E95060057 What is an edge?   對於灰階影像而言， Edge 是 gray level 有突 然或較大變化的地方。

8. Edge Detection-E95060058 What is edge detection?  顧名思義即為偵測邊緣，其目的是要圈出 圖形中目標物的輪廓，以方便後續的處理， 可說是一種影像的前處理  顧名思義即為偵測邊緣，其目的是要圈出 圖形中目標物的輪廓，以方便後續的處理， 可說是一種影像的前處理。

9. Edge Detection-E95060059 Flow Chart CastImageFilter CannyEdgeDetectionImageFilter RescaleIntensityImageFilter signed short float signed short

10. Edge Detection-E950600510 Flow Chart  toReal->SetInput( pDoc->ptrDupImage );  cannyFilter->SetInput( toReal->GetOutput() );  cannyFilter->SetVariance( 0.5);  cannyFilter->SetLowerThreshold( 255 );  cannyFilter->SetUpperThreshold( 90 );  rescale->SetInput( cannyFilter->GetOutput() );

11. Edge Detection-E950600511 original cannyFilter->SetVariance( 0.1 )

12. Edge Detection-E950600512 cannyFilter->SetVariance( 0.5) cannyFilter->SetVariance( 0.9 )

13. Edge Detection-E950600513 original cannyFilter->SetVariance( 0.1)

14. Edge Detection-E950600514 cannyFilter->SetVariance ( 0.5 ) cannyFilter->SetVariance ( 0.9 )

15. Edge Detection-E950600515 cannyFilter->SetVariance ( 0.1 ) original

16. Edge Detection-E950600516 cannyFilter->SetVariance ( 0.5 ) cannyFilter->SetVariance ( 0.9 )

17. Edge Detection-E950600517 Discussion  醫學影像具有高雜訊、低對比與幾何形狀 複雜的特性。  速度問題  未來應用