![]() ![]() However, transforming a bitmap to vector image is still a challenging problem because of the complicated content of a bitmap, which tends to consist of more than just simple geometry. For instance, it can be applied for the illustrations in newspapers and magazines, the logo on the web, the background for poster, the design of text, and traffic signs. Meanwhile, it has been commonly adopted in data visualization (image data) because it can be scaled to multiple sizes to fit different scenes. Compared with bitmaps, vector images have the ability to save memory as well as to enlarge without distortion. ![]() ![]() Vector image is a type of image composed of many geometric primitives. We compare all four techniques with respect to visual quality, performance, mathematical continuity, and editability. We adjust these patches from their original geometric 3D setting such that they have the same colour interpolation capabilities as the existing polygonal gradient mesh primitives. ![]() Our study includes the subdivision based, topologically unrestricted gradient meshes (Lieng et al., 2017) and the cubic mean value interpolant (Li et al., 2013), as well as two newly-proposed techniques based on multisided parametric patches building on the Gregory generalised Bézier patch and the Charrot-Gregory corner interpolator. We investigate and compare several formulations of the polygonal gradient mesh primitive capable of interpolating colour and colour gradients specified at the vertices of a 2D mesh of arbitrary manifold topology. Borrowing techniques from 3D graphics such as subdivision surfaces and generalised barycentric coordinates, it has been recently extended from its original form supporting only rectangular arrays to (gradient) meshes of arbitrary manifold topology. The gradient mesh is a powerful vector graphics primitive capable of representing detailed and scalable images. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |