在此基础上，引入二维FFT技术，对半色调误差图象的质量进行了分析研究。
On the basis of which the two dimentional FFT technology is introduced to analyse the quality of error between the halftone image and the original image.
由S-cone引起的色觉误差会导致颜色的接收都是基于红、绿色调，而深受赞誉的蓝、黄配色则无法感知。
Color deficiencies based on S-cones have the effect that color perception is based on red and green hues, the perception of the complimentary color pair blue and yellow is disturbed.
计算了喷墨绘图仪喷头的实际灰度，并基于这个实际灰度，改进了误差扩散方法和半色调技术。
On the basis of calculated actual grey, a modified error diffusion and halftone technique are researched.
介绍了有序抖动、误差扩散和模板法三种图像半色调方法，在此基础上，综述了现有的半色调图像水印算法，并对其中的四种方法进行了比较。
An overview of already proposed watermarking algorithms for halftone images is given, based on the introduction of three kinds of halftone methods, ordered dithering, error diffusion and pattern.
与传统的误差扩散法相比，使用这种算法输出的半色调图像更清晰，色调更连续。
Compared with standard error diffusion, the image using this algorithm has more explicit output and more continuous tones.
在半色调处理的数字调频挂网处理方法中，误差扩散是一种效果非常好的算法，但是需要大量计算与存储器操作，处理速度是它广泛应用的主要瓶颈。
Among many methods to digital FM halftone process, the error diffusion algorithm is a very good one, but unfortunately it is computationally costly and USES much memory access.
本文提出了一种半色调处理的算法，它结合了误差分散技术及半色调模对应方法来生成半色调图像。
A new watermarking technique based on HVS and error diffusion was introduced, which can embed watermarking in halftone image.
本文提出了一种半色调处理的算法，它结合了误差分散技术及半色调模对应方法来生成半色调图像。
A new watermarking technique based on HVS and error diffusion was introduced, which can embed watermarking in halftone image.
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