Python to Matlab scipy.ndimage.sum

Hello, i'am trying to convert a Python code to Matlab:

# Find connected components
    label_image , N = label( object_pixels, connectivity=1, return_num=True )

    # Integrate 1 over regions
    size_array = scipy.ndimage.sum( 1, label_image, index=range(0, N+1) )
    size_array = np.uint16(size_array)

    # Integrate intensity over regions
    total_light_array = scipy.ndimage.sum( original_image, label_image , index=range(0, N+1) )
    total_light_array = np.float6

For labeling i used

        [label_image,N] = bwlabeln(object_pixels_uint8);

but i cant realy see what scipy.ndimage.sum do mainly when the input=1, neither its Matlab equivalent.

Thank you

4(total_light_array)