The ML Super Resolution network includes 29 convolutional layers which scan the image and create an over-100-channel-deep version of it that contains a range of identified features. requires less computation) without losing important features (edges, patterns, colors, textures, gradients, and so on). This type of deep neural network reduces raster images and their complex inter-pixel dependencies into a form that is easier to process (i.e. To create the ML Super Resolution feature, we used a convolutional neural network. The ML Super Resolution convolutional neural network When upscaling, it can make much better predictions because a red pixel next to a blue pixel can be a completely different type of texture or edge in different images even though, to the primitive approaches, they’re always the same. So, how does the machine learning approach work? Put simply, it takes into account the actual content of every image, attempting to recognize edges, patterns, and textures, recreating detail based on our dataset and extensive training. So, ultimately, it’s useful in certain specialized situations, but not much more. Its main disadvantage is that, in its attempts to retain sharpness, the algorithm can sometimes create ringing artifacts. Lanczos is yet more advanced, using a complicated mathematical formula to interpolate (another word for predict) the value of any newly created pixels while keeping edges as sharp as possible. Traditional approaches use (relatively) simple mathematics to interpolate the values of pixels when scaling images. The algorithm can’t recreate detail that is too small to be visible but it can make amazing predictions about edges, shapes, contours, and patterns that traditional algorithms simply cannot.
In this case, we gathered a set of images, scaled them down, and then ‘taught’ the algorithm to go from the scaled-down version to the original resolution, high-quality image, predicting the values of each new pixel. One of the uses of machine learning, on a very fundamental level, is to make predictions about things. How does it all work?Īs computers get ever more powerful, the additional power opens up new possibilities. Now, with ML Super Resolution, scaling up an image to three times its original resolution is no problem at all.
Pretty incredible, right? Until now, if an image was too small to be used at its original resolution, either on the web or in print, there was no way to scale it up without introducing visible image defects like pixelation, blurriness, or ringing artifacts.
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