updated nested loop vars to be more readiable

    s_image_extent = s_image.image_extent

    for i in range(s_image_extent[2],s_image_extent[3]):

    starting_y = s_image_extent[2]

    ending_y = s_image_extent[3]

    starting_x = s_image_extent[0]

    ending_x = s_image_extent[1]

        for j in range(s_image_extent[0],s_image_extent[1]):

    for i in range(starting_y, ending_y):

        for j in range(starting_x, ending_x):

            s_image.x = (j)#*(1+template_size[0]))/2

            s_image.y = (i)#*(1+template_size[1]))/2

            s_image.x = (j)

            s_image.y = (i)

            # sub_image = s_image[i:i+template_size[1],  # y

            #                     j:j+template_size[0]]  # x

            corr = func(s_image, d_template, **kwargs)

            if corr > max_corr:

                max_corr = corr