视觉质量

术后早期SE、球镜度、高阶像差的变化值越大，夜间视觉质量越差，夜间眩光越显著。

Larger early postoperative changes of SE , spherical diopter , and HOA correlated with worse nocturnal visual quality and glare .

自适应光学矫正LASIK术后眼高阶像差对视觉质量的影响

Effects of high order aberration on visual quality in post-LASIK eyes with adaptive optics

虹膜定位波前像差引导的LASIK治疗近视散光术后视觉质量的研究

Visual performance of Wavefront-guided LASIK with Iris-registration for myopic astigmatism

近视手术LASIK术前后Q值的变化，及这种变化对视觉质量的影响。

The reformation of Q before and after myopic LASIK , and its effect on vision quality .

为了阻止经JPEG压缩后加水印图像在嵌入水印时建立的局部能量差可能会被擦除，在保证视觉质量不受影响的情况下，适当地增加子区A或B的能量。

After JPEG compression on the image embedded watermark , the energy difference which have been created while watermark was embedded could be erased .

结论：远视LASIK增加了眼的波前像差熏降低了眼的视觉质量。

Conclusion : Hypermetropic LASIK is found to increase the aberrations and decrease the image quality .

由此产生的已嵌入水印的目标图无噪声现象，有良好的视觉质量和理想的PSNR。

After watermarking , the image has good vision quality and its PSNR is ideal .

结论波前像差引导的LASIK能显著降低术后高阶像差的增幅，从而改善视觉质量。

Conclusion Wavefront aberration-guided LASIK surgery can significantly reduce the increase in higher-order aberrations in order to improve visual quality .

本算法对图像的感兴趣区域提供了比JPEG高得多的编码质量，能够获得良好的视觉质量。

This algorithm provides the ROI of image much higher coding quality than the JPEG , and can achieve a good visual quality .

使不同解剖结构的人眼光学系统获得最佳视觉质量的IOL种类不同。

The type of IOL was varied to obtain optimal optical performance for optical system of human eye with different anatomic structure .

结论LASIK单中心、多区切削治疗高度近视，减少了屈光回退，降低了眩光和暗适应当的发生率，提高了术后的视觉质量。

Conclusions In LASIK , single center and multiple cutting aera could reduce refractive regression , glare and improve visual quality .

实验表明，改进算法在保证视觉质量同时，获得更稳定的PSNR。

Simulations showed that this scheme improves the perceptual quality of the pictures with similar or smaller PSNR deviations .

人眼波前像差的精确测量能够有效保证LASIK术后人眼视觉质量的提高。

Accurate measurement for wave-front aberrations of the human eye can effectively guarantee the quality of human eye vision after LASIK operation .

实验结果表明，该算法在主观视觉质量和客观峰值信噪比（PSNR）上都优于传统方法。

Experimental results show that the algorithm outperforms the traditional one on both visual quality and Peak Signal-to-Noise Ratio ( PSNR ) .

良好的视觉质量和鲁棒性是免疫性水印算法的两个重要性能指标，本文基于Watson视觉感知模型设计了一个水印算法。

Two important performance of immune watermarking algorithm is well perceptual quality and robust , this paper designed a watermarking algorithm based on Watson Perceptual Model .

TestModel5（TM5）建议的码率控制算法不能正确处理场景切换，因此解码图像的主观视觉质量在场景切换处将急剧下降。

The rate control algorithm of Test Model 5 ( TM5 ) fails to handle scene change properly , and visual quality will be deteriorated near scene change point .

Epi-LASIK治疗中、低度近视的术后视觉质量

A clinical study of visual performance after Epi-LASIK for low and moderate myopia

Epi-LASIK术后视觉质量分析

An analysis of visual quality after Epi-LASIK

利用Matlab实验仿真，结果表明，该算法保证嵌入水印后图像具有良好的视觉质量；很强的图像篡改定位能力；算法简单，安全性高；水印提取时不需要原始图像，具有较好的实用性。

Experiments are done by Matlab , the results show that watermarked images obtained have good subjective quality , precise localization of tampered areas ; the algorithm is simple and safe , and the experiment results illustrate that it is validity .

该编码器与传统基于帧的视频编码器相比，在低比特率环境下，PSNR略为下降，但图像的主观视觉质量得到提高。

Compared with conventional frame based video coder , the OOBA coder can improve subjective quality of images at low bit rate , while decrease PSNR just a little .

HDTV以其高清晰度的视觉质量，宽幅面的视野，吸引了众多的商家、学者的关注，它反映了今后数字电视技术发展的趋势。

HDTV ( High Definition Television ) reflects the future of TV for its high resolution and large field of vision , which has attracted much more attention of numerous merchants and researchers .

误码控制技术（ECT）是目前广泛应用在视频通信领域，用以有效改善视频信息接收端解码输出视频信息视觉质量的一项关键技术。

Now Error Control Technology ( ECT ) had became a key technique which was wildly used in video communication filed . This technique could effectively improve the visual quality of decoded video information output from receiver .

结论LASIK术后视觉质量改变的发生与多种因素有关，其预后与发生原因和治疗有关，规范的手术程序可减少其发生率。

Conclusion The occurrence of visual quality descending post LASIK was correlated to many factors . The prognosis was correlated to the causation and treatment . The normative operative procedure could reduce the occurrence .

而视功能的形觉和深度觉是视觉质量的重要体现，因此，我们采用对比敏感度和立体视觉检查对近视患者LASIK术前、术后视功能情况进行全面地评价和分析。

The sense and depth perception in visual function are important manifestation of visual quality . So we have evaluated and analysed contrast sensitivity ( CS ) and stereoscopic vision before and after LASIK .

结论22mmHg负压环辅助注视为PRK和LASIK术中的眼球固定提供良好的控制技术，对提高激光角膜屈光手术的视觉质量具有重要意义。

Conclusion 22 mmHg suction ring aid fixation is an effective , safe approach to control eye shift during the surgery of PRK and LASIK . It will benefit the visual quality after refractive surgery .

目的评价透气性硬性接触镜（RGPCL）和框架眼镜矫正圆锥角膜的视觉质量差异。

Objective To evaluate the visual quality in keratoconus eyes corrected by rigid gas-permeable contact lens ( RGPCL ) and spectacles .

最后，经过仿真实验证明，与JPEG编码结果比较，在保证几何精度和图像视觉质量不衰减情况下，新的算法减少码率15.54%和运算时间8.3%。

Finally , the simulation experiments are showed that compared with JPEG algorithm the new method reduces 15.54 % of the code rate and saves 8.3 % of operation time . The DCT compression coding system with vector quantization has been studied here .

术后早期视觉质量的影响是短暂的，可以恢复甚至超过术前水平。

The disturbance of the visual quality after LASIK is transient .

近视散光眼高阶像差和视觉质量的关系

Higher order aberration and visual quality analysis in myopic astigmatism eyes

重视眼内屈光手术视觉质量的研究

To pay attention to vision quality of intraocular refraction surgery