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Pap
1.
李金龍
2.
摘要 移動物件的偵測方法 背景相減 背景更新 YCrCb 相鄰畫面相減 膚色偵測 MEI 結論
2/16
3.
*基於影像處理的學習與實驗, 先決目地在於找出移動中的膚色物體, 從最基本的處理方法慢慢的學習,
奠定基礎,以利往後的實驗。 3/16
4.
*背景相減 *相鄰畫面相減 *膚色偵測
4/16
5.
1/2 *將第一張影像保存當基礎背景圖 *之後的影像都與其相減後二值化 *得之的圖就是偵測到的移動物件
5/16
6.
2/2 *公式 T:門檻值 *展示1
6/16
7.
1/2 *利用背景相減的方法所改良 *將其中的基礎背景圖做更新 *得之的圖就是偵測到的移動物件
7/16
8.
2/2 *公式 *展示2
8/16
9.
*別稱YUV ,是色彩空間的一種,Y指亮度 CrCb為紅色與藍色的色度。 *使用的RGB轉YCrCb公式為:
9/16
10.
1/2 *使用亮度Y *利用相鄰兩個畫面進行相減 *得之物體的移動量
10/16
11.
2/2 *公式 *展示3
11/16
12.
1/2 *利用Cr Cb *直接找出膚色的物體範圍 *所使用的範圍為:
Cr 134 ~ 176 Cb 97.5 ~ 142.5 12/16
13.
2/2 *公式 *展示4
13/16
14.
*根據相鄰畫面相減與膚色偵測進行改良 *利用相鄰畫面相減,在連續畫面中累積亮度 圖 *與膚色偵測的圖合併得之 *展示5
14/16
15.
背景相減
背景更新 15/16 膚色偵測 相鄰畫面相減 MEI
16.
Thanks
16/16