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This is a recent paper that actually creates photos from sketches of faces, using deep nets: https://arxiv.org/abs/1606.03073

Figure 4 does this for self portraits of some famous artists.

You could probably apply the same code. The dataset ("acquire 75,471 sketches of 12,500 objects") sounds adequate, and if not, can be boosted by first training a CNN to do photo->sketch (throwing away information is usually easier than imagining it) and using that to boost the dataset for sketch->photo.

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