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This question already has an answer here:

How to Convert a low quality Image into High quality Image in Adobe Photoshop?? Anyone Helps!!!!!

marked as duplicate by Ryan, DᴀʀᴛʜVᴀᴅᴇʀ May 29 '14 at 13:46

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There is no way. High-res contain much more information than low-res, this is why you can't upscale raster image without quality loss.

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