Question

我收到此错误。

Traceback (most recent call last):
  File "C:\Users\rohit\Desktop\Python\driving-lane-departure-warning-master\main.py", line 19, in <module>
    img_aug = process_frame(img)
  File "C:\Users\rohit\Desktop\Python\driving-lane-departure-warning-master\lane.py", line 612, in process_frame
    output = create_output_frame(offcenter, pts, img_undist_, fps, curvature, curve_direction, binary_sub)
  File "C:\Users\rohit\Desktop\Python\driving-lane-departure-warning-master\lane.py", line 484, in create_output_frame
    whole_frame[220+h/2:220+2*h/2, 20:20+w/2, :] = undist_birdview
TypeError: slice indices must be integers or None or have an __index__ method

有谁能告诉我如何删除此错误？

以下是代码片段：

def create_output_frame(offcenter, pts, undist_ori, fps, curvature, curve_direction, binary_sub, threshold=0.6):
    """
    :param offcenter:
    :param pts:
    :param undist_ori:
    :param fps:
    :param threshold:
    :return:
    """

    undist_ori = cv2.resize(undist_ori, (0,0), fx=1/output_frame_scale, fy=1/output_frame_scale)
    w = undist_ori.shape[1]
    h = undist_ori.shape[0]

    undist_birdview = warper(cv2.resize(undist_ori, (0,0), fx=1/2, fy=1/2), M_b)

    color_warp = np.zeros_like(undist_ori).astype(np.uint8)

    # create a frame to hold every image
    whole_frame = np.zeros((h*3,w*3, 3), dtype=np.uint8)


    if abs(offcenter) > threshold:  # car is offcenter more than 0.6 m
        # Draw Red lane
        cv2.fillPoly(color_warp, np.int_([pts]), (255, 0, 0)) # red
    else: # Draw Green lane
        cv2.fillPoly(color_warp, np.int_([pts]), (0,255, 0))  # green

    newwarp = cv2.warpPerspective(color_warp, M_inv, (int(frame_width/input_scale), int(frame_height/input_scale)))

    # Combine the result with the original image    # result = cv2.addWeighted(undist, 1, newwarp, 0.3, 0)

    newwarp_ = cv2.resize(newwarp,None, fx=input_scale/output_frame_scale, fy=input_scale/output_frame_scale, interpolation = cv2.INTER_LINEAR)

    output = cv2.addWeighted(undist_ori, 1, newwarp_, 0.3, 0)

    ############## generate the combined output frame only for visualization purpose ################
    whole_frame[40:40+h, 20:20+w, :] = undist_ori
    whole_frame[40:40+h, 60+w:60+2*w, :] = output
    whole_frame[220+h/2:220+2*h/2, 20:20+w/2, :] = undist_birdview
    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 0] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 1] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)
    whole_frame[220+h/2:220+2*h/2, 40+w/2:40+w, 2] = cv2.resize((binary_sub*255).astype(np.uint8), (0,0), fx=1/2, fy=1/2)

    font = cv2.FONT_HERSHEY_SIMPLEX
    if offcenter >= 0:
        offset = offcenter
        direction = 'Right'
    elif offcenter < 0:
        offset = -offcenter
        direction = 'Left'

    info_road = "Road Status"
    info_lane = "Lane info: {0}".format(curve_direction)
    info_cur = "Curvature {:6.1f} m".format(curvature)
    info_offset = "Off center: {0} {1:3.1f}m".format(direction, offset)
    info_framerate = "{0:4.1f} fps".format(fps)
    info_warning = "Warning: offcenter > 0.6m (use higher threshold in real life)"

    cv2.putText(whole_frame, "Departure Warning System with a Monocular Camera", (23,25), font, 0.8, (255,255,0), 1, cv2.LINE_AA)
    cv2.putText(whole_frame, "Origin", (22,70), font, 0.6, (255,255,0), 1, cv2.LINE_AA)
    cv2.putText(whole_frame, "Augmented", (40+w+25,70), font, 0.6, (255,255,0), 1, cv2.LINE_AA)
    cv2.putText(whole_frame, "Bird's View", (22+30,70+35+h), font, 0.6, (255,255,0), 1, cv2.LINE_AA)
    cv2.putText(whole_frame, "Lanes", (22+225,70+35+h), font, 0.6, (255,255,0), 1, cv2.LINE_AA)
    cv2.putText(whole_frame, info_road, (40+w+50,70+35+h), font, 0.8, (255,255,0), 1,cv2.LINE_AA)
    cv2.putText(whole_frame, info_warning, (35+w,60+h), font, 0.4, (255,255,0), 1,cv2.LINE_AA)
    cv2.putText(whole_frame, info_lane, (40+w+50,70+35+40+h), font, 0.8, (255,255,0), 1,cv2.LINE_AA)
    cv2.putText(whole_frame, info_cur, (40+w+50,70+35+80+h), font, 0.8, (255,255,0), 1,cv2.LINE_AA)
    cv2.putText(whole_frame, info_offset, (40+w+50,70+35+120+h), font, 0.8, (255,255,0), 1,cv2.LINE_AA)
    cv2.putText(whole_frame, info_framerate, (40+w+250,70), font, 0.6, (255,255,0), 1,cv2.LINE_AA)

    return whole_frame

Answer 1

您使用的是哪个版本的Python？有可能问题是除以2。尝试分别用“h // 2”和“w // 2”替换“h / 2”和“w / 2”。

Answer 2

如果切片索引是float或double，或者切片的语法不正确，则会发生这种情况。检查切片语法或切片索引的类型。

可能的错误情况：

a = [1,2,3,4]
a = a[1.2:]
TypeError: slice indices must be integers or None or have an __index__ method

a = a[1,2:]
TypeError: slice indices must be integers or None or have an __index__ method

a = a[1:2,3:4,:]
TypeError: slice indices must be integers or None or have an __index__ method

获取TypeError：slice索引必须是整数

2 个答案: