怎样自拍更好看

If you've ever wondered what makes the perfect selfie, some of the world's most powerful computers have been pondering the same question.

如果你在琢磨怎样自拍更好看，世界上最强大的电脑也在思考着同样的问题。

Researchers have trained a neural1 network designed to think like the human brain to analyse millions of selfies to find what works.

Andrej Karpathy, a PhD student at Stanford working on Deep Learning, decided2 to use a powerful, 140-million-parameter state-of-the-art Convolutional Neural Network to help work out why some selfies are more popular than other.

'We decided to feed it 2 million selfies from the internet, and train it to classify good selfies from bad ones,' he explained in a blog.

The neural network, known as ConvNet 'looked' at every one of the 2 million selfies several tens of times.

Each time, it tuned3 its filters in a way that best allows it to separate good selfies from bad ones.

'We can't very easily inspect exactly what it found (it's all jumbled4 up in 140 million numbers that together define the filters),' said Karpathy.

'A few patterns stand out for me,' he said.

Women were consistently ranked higher than men - to the extent there was not a single male in the top 100.

The position and pose of the face is quite consistent among the top images.

The face always occupies about 1/3 of the image, is slightly tilted5, and is positioned in the center and at the top.

1 neural

adj.神经的，神经系统的

参考例句：

The neural network can preferably solve the non- linear problem.利用神经网络建模可以较好地解决非线性问题。

The information transmission in neural system depends on neurotransmitters.信息传递的神经途径有赖于神经递质。

2 decided

adj.决定了的，坚决的；明显的，明确的

参考例句：

This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。

There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。

3 tuned

adj.调谐的，已调谐的v.调音( tune的过去式和过去分词 )；调整；（给收音机、电视等）调谐；使协调

参考例句：

The resort is tuned in to the tastes of young and old alike. 这个度假胜地适合各种口味，老少皆宜。

The instruments should be tuned up before each performance. 每次演出开始前都应将乐器调好音。 来自《简明英汉词典》

4 jumbled

adj.混乱的；杂乱的

参考例句：

Books, shoes and clothes were jumbled together on the floor. 书、鞋子和衣服胡乱堆放在地板上。

The details of the accident were all jumbled together in his mind. 他把事故细节记得颠三倒四。

5 tilted

v. 倾斜的

参考例句：

Suddenly the boat tilted to one side. 小船突然倾向一侧。

She tilted her chin at him defiantly. 她向他翘起下巴表示挑衅。