constant block meaning in English

常数块

On the basis of the authors ’ results published in this journal [ 67 ] , this paper further proposed two strategies which improved both quality and speed of fractal encoding : one , a priori adding additive white gaussian noise into the image being encoded to reduce the domain blocks that are unlikely to meet the constraint on contrast scaling factors ; the other , range blocks with small standard deviations are directly approximated by the constant block ( i . e . , all the
在笔者原有结果[计算机仿真, no . 8 , 2004 ]的基础上,本文提出进一步提高解码图像质量和编码速度的方案:一是预先在待编码图像中添加高斯白噪声以进一步减少不满足对比度因子约束的domain块的数目;二是对小方差range块直接用其均值块代替以进一步加快编码速度。