junxnone / aiwiki

AI Wiki

https://junxnone.github.io/aiwiki

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CV Edge #65

Open junxnone opened 4 years ago

junxnone commented 4 years ago

边缘

Reference

Brief

Roberts
Prewitt
Sobel
Scharr
Canny
Marr-Hildreth

DL 中一般使用 Object Contour Detection & Semantic Segmentation 检测边缘

Roberts

用于图像锐化
计算量小
结果边缘不平滑

Original	Vertical - Positive	Horizontal - Negative
Computations
Pixel 权重

Prewitt

Original	Vertical	Horizontal
Computations
Pixel 权重

Sobel

相比 prewitt 增加了权重

Direction	Vertical - Gx	Horizontal - Gy
Computations
Pixel 权重

Scharr

使用了更大的权重

Direction	Vertical - Gx	Horizontal - Gy
Computations
Pixel 权重

Prewitt vs Sobel vs Scharr

Original	Roberts	Prewitt	Sobel	Scharr

junxnone commented 4 years ago

junxnone/aiwiki#64