How to turn the grey background white in a phone camera picture of a book?

Here is a picture (of many) that I took from a book with my phone camera.enter image description here

The problem is that the background is too grey. I want it fully white. I have adobe Photoshop CS6. Does anyone know how I can fix this?

Note: I need instructions, as I need to do this to many other pics.

Thanks

Answer

First you’ll want to desaturate the image (CMD+SHIFT+U), this removes any color and makes it easier to achieve pure white.

With your file open, choose Image->Adjustments->Levels. You’ll get this:
enter image description here

Now bring the two outer triangles in like this (you’ll need to play around with this until you get something you like):

enter image description here

You should end up with this!

enter image description here

Attribution
Source : Link , Question Author : omega , Answer Author : Circle B

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