鉴于传统的图像质量评价指标不能很好地反映图像质量，为了对图像质量进行更合理的评价，提出了一种新的彩色图像质量评价方法，该方法从图像的客观保真度、视觉失真度及清晰度3个方面来综合评价图像质量，其中，客观保真度作为图像质量的横向评价标准，而视觉失真度和清晰度则为其纵向评价标准。在评价图像的清晰度时，还充分考虑了彩色图像3帧间的结构相似性，把彩色图像的各个分量表示在一个统一的数学模型里，使用3维矩阵宽离散余弦变换来衡量图像的清晰度。实验结果表明，相对于传统的峰值信噪比评价指标来说，这种方法更为符合人眼视觉特性。

In this paper,DSF(definition,error sensitivity and objective fidelity),a new technique of color image quality measure has been proposed in which color image quality can be measured synthetically by calculating the objective fidelity,vision distortion and definition of a color image.The objective fidelity is a base for transverse comparison.While the vision distortion and definition is utilized for vertical evaluation.The great similarity among three frames of one image is taken into account fully and 3D-WDCT(three dimensional wide DCT) is used when the definition was calculated.Three frames,R,G and B,are integrated into one single mathematics model to be transformed.Against PSNR,this method will provide a better performance consistent with human visual characteristic.