发明名称 |
SYSTEM AND METHOD FOR IMAGE ENHANCEMENT, DYNAMIC RANGE COMPENSATION, AND ILLUMINATION CORRECTION |
摘要 |
A system and a method solve the estimation problem of finding reflectance and illumination L. The system and method solve a functional of the unknown illumination L such that a minimum of the functional is assumed to yield a good estimate of the illumination L. Having a good estimate of the illumination L implies a good estimate of the reflectance R. The functional uses a variational framework to express requirements for the optimal solution. The requirements include: 1) that the illumination L is spatially smooth; 2) that the reflectance values are in the interval [0,1]- thus, when decomposing the image S, the solution should satisfy the constraint L >;3) that among all possible solutions, the estimate of the illumination L should be as close as possible to the image S, so that the contrast of the obtained R is maximal; and 4) that the reflectance R complies with typical natural image behavior (e.g., the reflectance is piece-wise smooth). |
申请公布号 |
WO02089062(A3) |
申请公布日期 |
2003.12.18 |
申请号 |
WO2002US14987 |
申请日期 |
2002.04.30 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
KIMMEL, RONNY;ELAD, MICHAEL;SHAKED, DORON;KESHET, RENATO;SOBEL, IRWIN |
分类号 |
G06K9/46;G06T3/40;G06T5/00;G06T7/00;H04N1/407 |
主分类号 |
G06K9/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|