如何从列表中查找和删除图像的重叠切片？

我使用unutbu和Joe Kington在这个问题上提供的方法将图像划分为对象（切片）：使用python 在单色图像中的blob周围的矩形边界框，并列出这些对象，其格式如下：

I have divided an image into objects (slices) using the method kindly contributed by unutbu and Joe Kington at this question: Rectangular bounding box around blobs in a monochrome image using python and have a list of these objects which takes the following form:

the_blobs = [(slice(dy.start, dy.stop, None), slice(dx.start, dx.stop, None))]

dy.start给出起始的y像素值，dy.stop给出最终的y像素值，以及dx的相同交易。

dy.start gives the starting y-pixel value and dy.stop gives the final y-pixel value, and the same deal for dx.

在列表中有一些重叠的对象，即一个小对象（正方形）位于较大的对象（如圆圈）内。发生这种情况时，我想从列表中删除封闭对象（因为圆圈已包含它），例如

Within the list there are some objects which overlap i.e. one tiny object (a square) is within a larger object such as a circle. When this occurs I want to remove the "enclosed" object from the list (because the circle already has it included) e.g.

当前列表

the_blobs = [(slice(100L, 1000L, None), slice(100L, 1000L, None)), 
(slice(150L, 220L, None), slice(150L, 220L, None)), 
(slice(1001L, 2000L, None), slice(1500L, 1700L, None)),
(slice(2001L, 2200L, None), slice(1800L, 1890L, None))] 

理想列表（已删除对象）

the_blobs = [(slice(100L, 1000L, None), slice(100L, 1000L, None)), 
(slice(1001L, 2000L, None), slice(1500L, 1700L, None)),
(slice(2001L, 2200L, None), slice(1800L, 1890L, None))] 

我应该注意，作为上述问题的一部分，建议使用以下代码：

I should note that as part of the aforementioned question a suggestion was made to use the following code:

data_slices = ndimage.find_objects(coded_paws)
for s in data_slices:
    filled[s] = True
coded_paws, num_paws = ndimage.label(filled)
data_slices = ndimage.find_objects(coded_paws)  

然而，这似乎不是100％的时间都有效，而且它确实是一个略微超出的贡献原问题的范围，所以我将这一部分作为一个单独的具体问题重新开放。

However this doesn't seem to work 100% of the time, and it really was a contribution slightly beyond the scope of the original question so I'm re-opening this part as a separate, specific question.

关于如何实现这一点的任何想法？

Any ideas on how I can achieve this?

编辑：这是一个实际的图片示例，不能与上面的代码一起使用

Here's an actual image example which doesn't work with the above code

处理此退货

和

理想情况下，我想从切片列表中删除最后一张图片

Ideally I'd like to remove the last image from the list of slices