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Home Machine Learning

Pixelmator Pro: Image magic via machine learning

December 19, 2019
in Machine Learning
Pixelmator Pro: Image magic via machine learning
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Any sufficiently advanced technology is indistinguishable from magic.

—Arthur C. Clarke

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If you’ve been manipulating images with a computer as long as I have, you know that the holy grail for image-processing apps like Photoshop, Affinity Photo and Pixelmator Pro is to enlarge (or reduce) an image without introducing visible artifacts, blurriness, jagged edges or other unwanted elements.

Over the years, graphics apps have improved at scaling images using algorithms with names like Bilinear and Nearest Neighbor, but the results have never been great. If you try to enlarge or reduce most images with those algorithms, the resulting image will look better than if no algorithm had been applied, but it will rarely looked good.

Last week, however, Pixelmator Pro introduced a breakthrough feature called ML Super Resolution that uses machine learning to increase the resolution (size) of an image without losing (much) detail or introducing unwanted artifacts.

The blog post announcing the new feature proudly proclaimed, “Yes, zooming and enhancing images like they do in all those cheesy police dramas is now a reality!”

I’m not sure I’d go that far, but after a couple of days of testing, I’m quite impressed. While it can’t enlarge a postage-stamp sized low-resolution image to a perfect poster-sized high-res image, I’m amazed at how well the machine learning algorithm works to double, triple or even quadruple the size and resolution of many images.

I tried it with half a dozen different images, and it does a better job of enlarging (and reducing) the dimensions and resolution of photos than other available algorithms. Sometimes the improvements are modest; other times the improvements are striking; but, in every case, ML Super Resolution looked better to my eye.

Release Notes: Dwight Silverman’s weekly tech newsletter featuring insights, news and occasional whimsy about the latest in the industry

Behind the scenes, the magic is done by machine learning, which attempts to recognize edges, patterns, and textures and then recreate detail based on its dataset and extensive training. And, while machine learning requires more processing power than other algorithms — between 8,000 and 62,000 times more according to Pixelmator — images were processed in just a few seconds each on my 2015 MacBook Pro.

That’s impressive.

I’m still a fan of Affinity Photos, and I still use it for most of my image editing. But, going forward, I’ll break out Pixelmator Pro if I need a high-quality image enlargement or reduction. I may even switch to using it full-time.

I urge you to visit the Pixelmator blog at https://tinyurl.com/MLsuper, where you can read about the technology behind ML Super Resolution and see examples compared to the three most common algorithms — Bilinear, Nearest Neighbor and Lanczos.

Then, download the free trial and try it on some of your own images. I’ll be surprised if you’re not as impressed with ML Super Resolution as I am.

Details

Pixelmator Pro. $39.99. www.pixelmator.com

bob@workingsmarter

formacusers.com

Credit: Google News

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