Constrained circular-patch-based texture synthesis

Texture synthesis has been developed for several years. The traditional technique can generate a larger image from a small image while avoid feeling of repetition or uncontinuity. Some constrained synthesis methods which can synthesize image according to special location demand or other demands have been also proposed in recent years. However, in general, these constrained texture synthesis methods are simple and have few controllable factors to meet user's diverse needs. To control multiple-sample texture synthesis more flexibly in various aspects such as synthesis location, proportion and semantic objects, we present an interactive texture synthesis approach based on circular patches and constrained by objects according to a certain ratio. With this approach, source exemplars and the target image are firstly divided into several regions with different characters. Users can click the blocks in the source exemplars and the want-to-be-synthesized region in the target image, and then texture in the target image is synthesized with the corresponding regions in the source exemplars. In the process of texture synthesis, circular patch instead of square patch is used to eliminate the aliasing phenomena. Images are synthesized from multiple sample images with ratio constraint and experiments on images show that our approach can get effective results of ratio-constrained multi-sample synthesis.