摘要
基于图像纹理和阴影的信息判断物理光学特性,根据该特性是否一致提出一种检测图像真实性的算法。通过建立线性规划方程限定楔形方向和角度,并运用共轭梯度法去判定正确的纹理信息。纹理限定的光源位置或楔形的交集都可以作为判定图像真实性的依据。结合阴影和纹理的约束条件,使得楔形的参数更加精确。实验结果显示,所建立的算法可以正确显示光源的信息和图像中物体的光学特性,并判断图像是否被篡改。
The linear programming problem is employed to confine the direction and angle in the wedge, and the conjugate gradient methods are employed to describe the shading. Combining both the shading and shadow make the parameters in wedge more accurate. By the improved corresponding algorithms, the experimental results show that the light source direction and consistency can be calculated accurately.
出处
《微型机与应用》
2015年第22期37-40,共4页
Microcomputer & Its Applications
关键词
纹理
阴影
光学特性
线性规划
shading
shadow
optical characteristics
linear programming
