基于对比度敏感理论的LED视频叠加显示方法

Overlay Display Method of LED Video Based on Contrast Sensitivity Theory

为使LED视频呈现效果更贴合人眼视觉,提出基于对比度敏感理论的LED视频叠加显示方法。依据人眼对比敏感度函数搭建亮度、对立色彩视觉特性模型,依据人眼视觉图像误差阈值创建自适应量化表;实现LED视频自适应压缩处理,获取更符合人眼视觉感知的LED视频图像,采用自适应牛顿插值算法计算、比较像素相关因子,插值处理自适应量化压缩后图像,更好保留压缩处理后LED视频图像信息。结果表明,处理后LED视频图像边缘平滑且顺畅,效果较佳,且结构相似度SSIM归一化值显著提升,信息熵、NIMA、BIQI三类指标均表现优秀,叠加显示后图像质量更好。

In order to make the display effect of LED video more suitable to human vision,an LED video superimposed display method based on contrast sensitivity theory is proposed.According to the human eye contrast sensitivity function,we build a model for the brightness and opposite color based on visual characteristics,and create an adaptive quantization table based on the human visual image error threshold.It realizes the LED video adaptive compression processing,and obtains the LED video image that is better for the human visual perception.The adaptive Newton interpolation algorithm is used to calculate and compare the pixel correlation factors,and the interpolation process adaptively quantizes the compressed image,which better retains the LED video image information after the compression process.The results show that the edge of the LED video image is smooth,the effect is better,and the normalized value of structural similarity SSIM is significantly improved.The three indexes of information entropy,NIMA and BIQI perform well,and the image quality is better after superimposed display.