In fact, this is not possible, but you can use photography enhancement techniques. If you add brightness, sharpness, and retouch noise, you can achieve good results.
You won't be able to in photoshop, as the quality is the quality. There is however AI Software 'Topaz Gigipixel' that can increase (https://topazlabs.com/gigapixel-ai/) . I was sceptical, but really works a treat, it does cost but I think you can do a free trial.
Marketing Coordinator at Gardien Products, a division of Consolidated Foam, Inc.
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You can't increase quality. If your image is 3x2 @72dpi, and you blow it up to 12x6 and set the dpi to 300, it won't do anything. If you have grainy photos, you can sometimes use softwares like Topaz and it can help, but most of time, it is what it is.
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