Invention Grant
- Patent Title: Smoothed local histogram filters for computer graphics
- Patent Title (中): 用于计算机图形的平滑局部直方图滤镜
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Application No.: US12493207Application Date: 2009-06-28
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Publication No.: US08406518B2Publication Date: 2013-03-26
- Inventor: Michael Kass , Justin Solomon , Rick Sayre
- Applicant: Michael Kass , Justin Solomon , Rick Sayre
- Applicant Address: US CA Emeryville
- Assignee: Pixar
- Current Assignee: Pixar
- Current Assignee Address: US CA Emeryville
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: G06K9/00
- IPC: G06K9/00

Abstract:
Local histogram and local histogram-based functions can be determined by generating offset-kernel images based on domain-shifted tonal filter kernels. The offset-kernel images can be reused for multiple image locations and/or local neighborhood sizes, shapes, and weights. A neighborhood filter representing the desired local neighborhood size, shape, and frequency domain characteristics is applied to each of the offset-kernel images. Neighborhood filters may include a temporal dimension for evaluating neighborhoods in space and time. Neighborhood filtered offset-kernel images' values represent samples of local histogram or local histogram-based function corresponding with the domains of their associated domain-shifted tonal filter kernels. Arbitrary functions may be used as tonal filter kernels. A histogram kernel may be used to sample values of local histogram functions. A tonal filter kernel that is a derivative or integral of another tonal filter kernel may be used to sample a derivative or integral, respectively, of a function.
Public/Granted literature
- US20100310168A1 Smoothed Local Histogram Filters for Computer Graphics Public/Granted day:2010-12-09
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