square_marker_detect.py 文件源码

def m_marker_to_screen(marker):
    #verts need to be sorted counterclockwise stating at bottom left
    #marker coord system:
    # +-----------+
    # |0,1     1,1|  ^
    # |           | / \
    # |           |  |  UP
    # |0,0     1,0|  |
    # +-----------+
    mapped_space_one = np.array(((0,0),(1,0),(1,1),(0,1)),dtype=np.float32)
    return cv2.getPerspectiveTransform(mapped_space_one,np.array(marker['verts'],dtype=np.float32))