Abstract
The implicit neural networks (INNs) can represent images in the continuous domain. They consume raw (X, Y) coordinates and output a color value. Therefore they can represent and generate images at arbitrarily high resolutions in contrast to convolutional neural networks (CNNs) that output a constant-sized array of pixels. In this work, we show how to super-resolve a single image using an INN to produce sharp and photo-realistic images. We employ a random patch-based coordinate sampling method to obtain patches with context and structure; we use these patches to train the INN in an adversarial setting. We demonstrate that the trained network retains the desirable properties of INNs while the output is sharper compared to previous work. We also show qualitative and quantitative comparisons with INN and CNN baselines on benchmark datasets of DIV2K, Set5, Set14, Urban100, and B100. Our code will be made public.
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