utils.py 文件源码

def bbox_ious(boxes1, boxes2, x1y1x2y2=True):
    if x1y1x2y2:
        mx = torch.min(boxes1[0], boxes2[0])
        Mx = torch.max(boxes1[2], boxes2[2])
        my = torch.min(boxes1[1], boxes2[1])
        My = torch.max(boxes1[3], boxes2[3])
        w1 = boxes1[2] - boxes1[0]
        h1 = boxes1[3] - boxes1[1]
        w2 = boxes2[2] - boxes2[0]
        h2 = boxes2[3] - boxes2[1]
    else:
        mx = torch.min(boxes1[0]-boxes1[2]/2.0, boxes2[0]-boxes2[2]/2.0)
        Mx = torch.max(boxes1[0]+boxes1[2]/2.0, boxes2[0]+boxes2[2]/2.0)
        my = torch.min(boxes1[1]-boxes1[3]/2.0, boxes2[1]-boxes2[3]/2.0)
        My = torch.max(boxes1[1]+boxes1[3]/2.0, boxes2[1]+boxes2[3]/2.0)
        w1 = boxes1[2]
        h1 = boxes1[3]
        w2 = boxes2[2]
        h2 = boxes2[3]
    uw = Mx - mx
    uh = My - my
    cw = w1 + w2 - uw
    ch = h1 + h2 - uh
    mask = ((cw <= 0) + (ch <= 0) > 0)
    area1 = w1 * h1
    area2 = w2 * h2
    carea = cw * ch
    carea[mask] = 0
    uarea = area1 + area2 - carea
    return carea/uarea