Make crap pictures look OK

1. Image > Image Size > Resolution – change to 300dpi (Resample Bicubic Smoother)

2. Filter > Noise > Despeckle

3. Filter > Stylize > Defuse (Anisotropic)

4. Filter > Sharpen > Unsharp Mask ( 200%)

5. Filter > Noise > Add Noise… ( 2%)

6. Duplicate the layer; Select Layer 2 – Filter > Other > High Pass (2 px) – Right click – Blending Options > Blend Mode > Overlay

https://www.youtube.com/watch?v=pc0PpS9nWV0