Disclosed are embodiments of systems, devices, and methods to reduce compression artifacts in multi-layer images. Pixel dilation operations, such as morphological dilations, are performed to identify unlabeled pixels at boundaries between layers, and the colors of those pixels are adjusted to mitigate...http://www.google.de/patents/US7991229?utm_source=gb-gplus-sharePatent US7991229 - Reducing compression artifacts in multi-layer images
