查询词典 just noticeable difference

Study on Just-Noticeable Color Difference Discrimination Threshold by Using Printed Samples I: Analysis of Visual Evaluation Experimental Data.

作者简介黄敏(1979-)，女，博士研究生，讲师，主要从事显示设备、输出设备的颜色色差评价，测量及色彩管理技术研究。

Moving to a market-based economy from a centrally-planned economy was just the first noticeable difference from the late 1980s.

中国是世界上国内生产总值发展最快的国家之一。

Moving to a market-based economy from a centrally-planned economy was just the first noticeable difference from the late 1980s.

从八十年代后期起由中央集权的计划经济向市场经济过渡只是最引人注目的变化。

Plus lenses were added in 0.12 d steps until subjects reported a just noticeable difference in blur.

目的 分析不同屈光组模糊阈值之间的差异，探讨模糊阈值在近视发生发展中的可能作用机制。

The deduced just noticeable difference on natural image content can be used to normalize these four attributes and to further explore the image quality model.

利用实验结果可以将色彩度、亮度、对比度和清晰度等因素进行归一化和量化，从而建立包含上述4种因素的图像质量模型。

Based on characteristics of human visual system, including texture/contract masking property and sensitivity of frequency, and combining with wavelet multi-resolution theory, a novel just noticeable difference model that can embed watermark adaptively is proposed.

用该模型可使指纹特征信息生成的数字水印自适应嵌入合成的指纹图像中，提高了指纹认证系统的可信度。

In this ***, we also show how to compute a perceptual matrix about the Just Noticeable Difference based on Watson model. Then, according to the matrix, we develop two new algorithms of digital watermark based on Discrete Cosine Transform. In the last part of this chapter, we use some experiments to validate our algorithms.

在对Watson的视觉模型作了较为详细的描述的基本上，依据Watson模型并结合JPEG图像紧缩中常用的DCT变换及JPEG紧缩量化表，提出了基于Watson模型的DCT域低频与中频数字水印算法，并给出试验结果。

Study of contrast sensitivity of the human eye shows that logarithm curve obeys the Weber-Fechner law of just noticeable difference response in human perception.

关於寻找最小有效剂量的统计方法，一般而言，会先确定所采用的检定统计量，再依据封闭降阶的方式侦测最小有效剂量。

The proposed algorithm comprehensively considers the effects of local area average brightness of the background and space complexity on visual resolution. In order to judge whether the variance of gray is effectively percepted or not, the just noticeable difference is derived. The changes in the number of perceptible pixels between the original image and the enhanced image can be calculated by use of JND parameter. Thus quantitative results to assess the quality of enhanced images are obtained.

算法综合考虑图像局部区域的背景平均亮度和空间复杂度对视觉分辨力的影响，导出了用于判断局部灰度级跃变是否被有效感知的重要参数―临界可见偏差JND，并利用此参数分别计算出图像增强前后有效感知像素数的变化情况，从而定量地给出图像增强质量的评价结果。

Unlike the common just noticeable difference study, the JNDs on natural image content by human eyes under general viewing conditions are evaluated.

与以往JND研究不同，针对视频显示应用，研究了在一般观测条件下，友眼观测自然图片时上述4种图像质量影响因素的JND值。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！