Towards a spatio-chromatic standard observer for detection
Towards a spatio-chromatic standard observer for detection
复制标题
走向用于检测的空间色彩标准观察者
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Ahumada
中科院分区：
文献类型：
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作者：
S. Wuerger;A. Watson;A. Ahumada
ColorFest的目的是扩展原始ModelFest（http：//vision.arc.nasa.gov/modelfest/）实验，以构建用于检测静态彩色图像的空间色标准观测器。需要解决的两个主要问题是（1）三种色度机制的对比灵敏度函数和（2）如何组合这些通道的输出。我们测量了沿沿着不同颜色方向调制的刺激和宽范围的空间频率的检测阈值。使用三个主要方向（消色差方向、名义上的等亮度红-绿方向和三色混色线）和四个中间颜色方向。这些中间方向是阈值沿主方向的沿着矢量和。我们评估了两个模型。检测性能由定义色度调谐的线性变换C和反映特定空间频率的色度机制的灵敏度的对角矩阵S来描述。这三个色机制的输出根据闵可夫斯基度量（一般可分模型）或根据欧几里得距离度量（椭球可分模型）进行组合。对于所有三个观察者，椭球模型拟合以及一般的可分离模型。估计色度调谐改进了模型对一个观察者的拟合。
The aim of the ColorFest is to extend the original ModelFest (http://vision.arc.nasa.gov/modelfest/) experiments to build a spatio-chromatic standard observer for the detection of static coloured images. The two major issues that need to be addressed are (1) the contrast sensitivity functions for the three chromatic mechanisms and (2) how the output of these channels is combined. We measured detection thresholds for stimuli modulated along different colour directions and for a wide range of spatial frequencies. The three main directions (an achromatic direction, a nominally isoluminant red-green direction, and the tritanopic confusion line) and four intermediate colour directions were used. These intermediate directions were the vector sums of the thresholds along the main directions. We evaluate two models. Detection performance is described by a linear transformation C defining the chromatic tuning and a diagonal matrix S reflecting the sensitivity of the chromatic mechanisms for a particular spatial frequency. The output of the three chromatic mechanisms is combined according to a Minkowski metric (General Separable Model), or according to a Euclidean Distance measure (Ellipsoidal Separable Model). For all three observers the ellipsoidal model fits as well as the general separable model. Estimating the chromatic tuning improves the model fit for one observer.
影响因子：
5.5
作者：
DERRINGTON, AM;KRAUSKOPF, J;LENNIE, P
通讯作者：
LENNIE, P