ValueError:无法从形状(相同形状)广播输入数组

Question

关于从形状广播输入数组，我收到了一个错误。通常，这似乎是由于将维度p的某些数组转换为维度数组：p+1或p-1造成的。然而，我的输入和输出的形状似乎是相同的:三维。所以我的问题是，我做错了什么，我该如何处理这个问题？

ValueErrorTraceback (most recent call last)
<ipython-input-21-e821b7e8e0de> in <module>()
    108                   "overlay_glasses.shape: ", overlay_glasses.shape)
    109 
--> 110             overlay_img[int(y):int(y+h),int(x):int(x+w)] = overlay_glasses
    111 

下面是打印语句的输出，以便更好地理解上面的代码。

'overlay_img.shape: '    , (365, 365, 3), 
'overlay_glasses.shape: ', ( 34,  99, 3)
'x: ', 623.26, 'y: ', 265.9
'h: ', 34, 'w: ', 99

更大的代码片段：

[omitted code here]
if len(centers)>0:
    # change the given value of 2.15 according to the size of the detected face
    glasses_width = 2.16*abs(centers[1][0]-centers[0][0])
    overlay_img = np.ones(shape = roi_color.shape,
                          dtype = np.uint8)*255
    h,w = glass_img.shape[:2]
    scaling_factor = glasses_width/w
    overlay_glasses = cv2.resize(src           = glass_img,
                                 dsize         = None,
                                 fx            = scaling_factor, # scale factor along x-axis; when it equals 0, it is computed as \texttt{(double)dsize.width/src.cols}
                                 fy            = scaling_factor, # scale factor along y-axis
                                 interpolation = cv2.INTER_AREA) # INTER_AREA: resampling using pixel area relation. It may be a preferred method for image decimation,

    x = centers[0][0] if centers[0][0] < centers[1][0] else centers[1][0]

    #   The x and y variables  below depend upon the size of the detected face.
    x   -=  0.26*overlay_glasses.shape[1]
    y   +=  0.85*overlay_glasses.shape[0]
    print("x: ", x,
          "y: ", y)

    #slice the height, width of the overlay image.
    h,  w   =   overlay_glasses.shape[:2]

    print("h: ", h,
          "w: ", w)

    print("overlay_img.shape: ", overlay_img.shape,
          "overlay_glasses.shape: ", overlay_glasses.shape)

    overlay_img[int(y):int(y+h),int(x):int(x+w)] = overlay_glasses # this is the offending line of code

Answer 1

您的x超出了为您提供的overlay_img创建子图像的范围。您的图像大小为(365,365，3)，但您提供的x为623，x+w为722。这会产生一个空的子图像，不能用overlay_glasses的内容填充。显然，x坐标有问题。