技術標籤：opencvPython影象處理

1.從原圖截圖rect區域

        img = cv2.imread(imgname)
        h_ori, w_ori = img.shape[:2]

        minx = w_ori
        miny = h_ori
        maxx = 0
        maxy = 0

        x = 1
        y = 1
        w = 10
        h = 20

        if x < 0: x = 0
        if y < 0: y = 0
        if x < minx: minx = x
        if y < miny: miny = y
        if x + w > maxx: maxx = x + w
        if y + h > maxy: maxy = y + h

        img1 = img[miny:maxy, minx:maxx]


https://www.cnpython.com/qa/214749
 

2.繪製線段，矩形框，寫文字

3.影象拼接

4.交換通道