D'Zmura M, Colantoni P, Knoblauch K, Laget B
Institut d'Ingénierie de la Vision, Université de St Etienne, France.
Perception. 1997;26(4):471-92. doi: 10.1068/p260471.
Observation suggests that the chromatic changes which elicit an impression of transparency include translations and convergences in color space. Neither rotations nor shears in color space lead to perceived transparency. Results of matching experiments show that equiluminous translations, which cannot be generated by episcotister or filter models, give rise to the perception of transparency. This implies that systematic luminance change is not needed for transparency to be perceived. These results were used for the development of a method for detecting a transparent overlay within a color image and for separating the overlay from the underlying surfaces. The method tests for the coherence of chromatic change along contours through X-junctions to help detect the contour of a transparent region. The algorithm tests locally for translation and convergence to detect a transparent region. It estimates globally the chromatic parameters of the transparent overlay in order to separate the overlay from the underlying surfaces.
观察表明，引发透明感的色彩变化包括色彩空间中的平移和汇聚。色彩空间中的旋转和剪切都不会导致产生透明感。匹配实验结果表明，等亮度平移（这是旋光器或滤光器模型无法产生的）会引发透明感。这意味着感知到透明并不需要系统的亮度变化。这些结果被用于开发一种检测彩色图像中透明覆盖物并将其与下层表面分离的方法。该方法通过X型交叉点测试沿轮廓的色彩变化的连贯性，以帮助检测透明区域的轮廓。该算法在局部测试平移和汇聚以检测透明区域。它全局估计透明覆盖物的色彩参数，以便将覆盖物与下层表面分离。
