caa a22 4500 605541116 CHVBK 20210128100914.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00371-014-0997-3 doi (NATIONALLICENCE)springer-10.1007/s00371-014-0997-3 A vectorization framework for constant and linear gradient filled regions [Elektronische Daten] [Ruchin Kansal, Subodh Kumar] Linear gradients are commonly applied in non-photographic artwork for shading and other artistic effects. It is sometimes necessary to generate a vector graphics form of raster images comprising such artwork with the expectation to obtain a simple output and plug it into a traditional workflow, to be further edited and arranged. Many such workflows support only linear gradients and our goal is to generate a standard vector form of the image that can fit such workflow. This vectorization process should be automatic with minimal user intervention. We present a simple image vectorization algorithm that detects regions of linear gradient in potentially noisy images and reconstructs the vector definition on the basis of that information. It uses a novel interval gradient optimization scheme to derive large regions of uniform gradient. We also demonstrate the technique on noisy and hand-drawn portraits. Springer-Verlag Berlin Heidelberg, 2014 Image vectorization nationallicence Gradient reconstruction nationallicence Region detection nationallicence Kansal Ruchin IIT, Delhi, Delhi, India aut Kumar Subodh IIT, Delhi, Delhi, India aut The Visual Computer Springer Berlin Heidelberg 31/5(2015-05-01), 717-732 0178-2789 31:5<717 2015 31 371 https://doi.org/10.1007/s00371-014-0997-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00371-014-0997-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kansal Ruchin IIT, Delhi, Delhi, India aut NATIONALLICENCE 700 1- Kumar Subodh IIT, Delhi, Delhi, India aut NATIONALLICENCE 773 0- The Visual Computer Springer Berlin Heidelberg 31/5(2015-05-01), 717-732 0178-2789 31:5<717 2015 31 371