Google recently launched a curious new app, called PhotoScan, that allows you to easily digitize your old printed photos by just pointing your phone's camera at them for a few moments and letting the app do its automated magic. PhotoScan is a smart tool, no questions asked, boasting such features as automatic edge detection, perspective correction, smart rotation, and about the most clever glare reduction technique we've ever seen in a mobile app. We wouldn't be surprised if you wowed a little inside the first time you scan an old print and see it perfectly cropped and straightened on your phone's screen, as though it isn't just a picture of a picture but a photo you took just now.
PhotoScan does produce some ostensibly good-looking results... as long as you view them on your phone's screen and don't actually zoom in on them. Once you decide to sift through your newly digitalized album on your PC, PhotoScan's limitations become painfully apparent. For all the smart new features it boasts, and for priding itself as a “photo scanner from the future” that creates “enhanced” digital scans, Google's new app produces some very coarse, scaled down, visibly compressed results that are simply inadequate for the purpose of archiving images.
So, what's wrong?
Well, for one thing, PhotoScan scans, which we will be referring to as simply “PhotoScans” from here on out, are very low-res. Processed images are limited to a maximum resolution of 2000 x 2000 pixels, which is roughly equivalent to what a 3 MP camera would produce. And not only that, but the outcome is also very noticeably compressed when examined on a larger screen. Let's take a look at some examples we made with an iPhone 7 Plus, which has a 12 MP camera (Note: we tested PhotoScan with other phones, including the Nexus 6P and Galaxy S7 with no visible differences in the end results):
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