|
Foveated imaging is a digital image processing technique in which the image resolution, or amount of detail, varies across the image according to one or more "fixation points." A fixation point indicates the highest resolution region of the image and corresponds to the center of the eye's retina, the fovea. The location of a fixation point may be specified in many ways. For example, when viewing an image on a computer monitor, one may specify a fixation using a pointing device, like a computer mouse. Eye trackers which precisely measure the eye's position and movement are also commonly used to determine fixation points in perception experiments.〔McConkie G W and Rayner K (1975) The span of the effective stimulus during a fixation in reading, Perception & Psychophysics, 17, 578–86〕〔Loschky, L.C. & Wolverton, G.S. (2007). How Late Can You Update Gaze-contingent Multi-resolutional Displays Without Detection? ACM Transactions on Multimedia Computing, Communications and Applications, 3(4):25, 1-10.〕 When the display is manipulated with the use of an eye tracker, this is known as a gaze contingent display.〔Duchowski, A. T., Cournia, N., and Murphy, H. 2004. Gaze-Contingent displays: A review. Cyberpsychol. Behav. 7, 6, 621--634.〕 Fixations may also be determined automatically using computer algorithms.〔Z. Wang, L. Lu and A. C. Bovik, "Foveation scalable video coding with automatic fixation selection," IEEE Trans. on Image Processing, Vol: 12 No: 2, February 2003.〕〔R. G. Raj, W. S. Geisler, R. A. Frazor, A. C. Bovik, "Contrast statistics for foveated visual systems: Fixation selection by minimizing contrast entropy" Journal of the Optical Society of America.〕 Some common applications of foveated imaging include imaging sensor hardware〔J.A. Boluda, F. Pardo, T. Kayser, J.J. P'erez, and J. Pelechano. A new foveated space-variant camera for robotic applications. In IEEE, International Conference on Electronics Circuits And Systems, ICECS'96, Rodos, Greece, October 1996.〕 and image compression.〔Geisler, W.S. and Perry, J.S. (1998) A real-time foveated multi-resolution system for low-bandwidth video communication. In B. Rogowitz and T. Pappas (Eds.), Human Vision and Electronic Imaging, SPIE Proceedings, 3299, 294-305.〕 For descriptions of these and other applications, see the list below. Foveated imaging is also commonly referred to as space variant imaging or gaze contingent imaging. ==Applications== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Foveated imaging」の詳細全文を読む スポンサード リンク
|