In computer graphics, image order algorithms iterate over the pixels in the image to be produced, rather than the elements in the scene to be rendered.[1][2] Object order algorithms are those that iterate over the elements in the scene to be rendered, rather than the pixels in the image to be produced. For typical rendering applications, the scene contains many fewer elements (e.g. geometric primitives) than image pixels. In those cases, object order algorithms are usually most efficient (e.g. scan conversion or shear warp). But when the scene complexity exceeds that of the image, such as is the case often in volume rendering, then image order algorithms (e.g., ray casting) may be more efficient. Some volume-rendering methods do not fit cleanly into either category; for example, shear-warp rendering traverses both the volume and an intermediate image to combine image-order and object-order advantages.[3][4]

References

edit
  1. ^ Isaac Bankman (24 December 2008). Handbook of Medical Image Processing and Analysis. Elsevier. pp. 789–. ISBN 978-0-08-055914-8.
  2. ^ Markus Gross, Hanspeter Pfister (2007). Point-Based Graphics. Elsevier. pp. 525–. ISBN 9780123706041.
  3. ^ "Chapter 7 - Advanced Computer Graphics - VTK Book". VTK / Kitware.
  4. ^ Lacroute, Philippe; Levoy, Marc (1994). "Fast Volume Rendering Using a Shear-Warp Factorization of the Viewing Transformation" (PDF). Stanford University / SIGGRAPH '94.

📚 Artikel Terkait di Wikipedia

Rendering (computer graphics)

Rendering is the process of generating an image from input data such as 3D models. The word "rendering" (in one of its senses) originally meant the task

Image-based modeling and rendering

In computer graphics and computer vision, image-based modeling and rendering (IBMR) methods rely on a set of two-dimensional images of a scene to generate

Volume rendering

as image based volume rendering technique, as the computation emanates from the output image, not the input volume data as is the case with object based

Real-time computer graphics

generating 2D images such as simple lines, images and polygons in real time since their invention. However, quickly rendering detailed 3D objects is a daunting

Glossary of computer graphics

format A common 3D file format. Object order rendering Rendering methods that iterate over objects in the scene and draws then one by one (e.g. rasterization)

List of computer graphics and descriptive geometry topics

High-dynamic-range rendering Image and object order rendering Image-based lighting Image-based modeling and rendering Image compression Image file format Image plane

Parallel rendering

increase graphical fidelity. Rendering is an embarrassingly parallel workload in multiple domains (e.g., pixels, objects, frames) and thus has been the subject

False color

False colors and pseudo colors respectively refers to a group of color rendering methods used to display images in colors which were recorded in the visible