怎樣自拍更好看

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

如果你在琢磨怎樣自拍更好看，世界上最強大的電腦也在思考著同樣的問題。

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.神經的，神經係統的

參考例句：

The neural network can preferably solve the non- linear problem.利用神經網絡建模可以較好地解決非線性問題。

The information transmission in neural system depends on neurotransmitters.信息傳遞的神經途徑有賴於神經遞質。

2 decided

adj.決定了的，堅決的；明顯的，明確的

參考例句：

This gave them a decided advantage over their opponents.這使他們比對手具有明顯的優勢。

There is a decided difference between British and Chinese way of greeting.英國人和中國人打招呼的方式有很明顯的區別。

3 tuned

adj.調諧的，已調諧的v.調音( tune的過去式和過去分詞 )；調整；（給收音機、電視等）調諧；使協調

參考例句：

The resort is tuned in to the tastes of young and old alike. 這個度假勝地適合各種口味，老少皆宜。

The instruments should be tuned up before each performance. 每次演出開始前都應將樂器調好音。 來自《簡明英漢詞典》

4 jumbled

adj.混亂的；雜亂的

參考例句：

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

The details of the accident were all jumbled together in his mind. 他把事故細節記得顛三倒四。

5 tilted

v. 傾斜的

參考例句：

Suddenly the boat tilted to one side. 小船突然傾向一側。

She tilted her chin at him defiantly. 她向他翹起下巴表示挑釁。