The machine USES photo diodes, for instance, to check whether the carrier has been correctly loaded - if so, the light from the diodes is obscured by the workpieces.

设备采用了光电二极管，举例来说，检查运载装置是否已正确装载时，如果是，二极管发出的光线就会被工件遮盖。

youdao

If you check the histogram, you can easily see which tones are not in your photo.

如果你检查分布图，你可以轻松地看到哪个色调不在你的照片里面。

youdao

And if you like to see some more pictures from the book, check this photo gallery from Time Magazine. Thanks Steve.

如果你想看到更多的照片，请按这里(时代杂志)。

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In the meantime, we've made a lovely video and photo gallery below, so check them out.

ENGADGET: Geeksphone Keon hands-on: a small Firefox OS phone that has big dreams (video)

To check whether a photo has any people tags, tap once on the images, and the names will appear.

CNN: Photo tagging finally comes to Instagram

Check out the photo gallery above for world's top 10 airport hotels.

CNN: Check in: World's best airport hotels