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Simulating Adaptation Luminances

机译:模拟适应亮度

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摘要

A method for simulating the effects of visual adaptation using image processing techniques was developed, and then tested for accuracy in predicting the reductions in visual performance that occur with adaptation. The simulation process entailed transforming digital photographs of realistic exterior scenes into the spatial frequency domain, filtering the transformed data using contrast sensitivity functions for different adaptation levels, transforming the filtered data back into the luminance domain, and producing a new digital image of the scene. Two experiments were conducted that compared performance on a realistic visual detection task when the subjects were adapted to different luminances, to performance on the same task when subjects' adaptation level was held constant while they viewed the simulated adaptation effects. Results showed that the simulations produced decreases in performance in the same direction as actual adaptation effects, but the effects were of smaller magnitude. A third experiment was conducted to better quantify the differences between the simulated and actual adaptation conditions; this experiment utilized a standardized visual test target, the United States Air Force (USAF) 1951 test pattern.
机译:开发了一种使用图像处理技术模拟视觉适应效果的方法,然后测试了预测适应性视觉性能下降的准确性。仿真过程需要将现实的外部场景的数字照片转换为空间频域,使用针对不同适应级别的对比敏感度函数对转换后的数据进行滤波,将滤波后的数据转换回亮度域,并生成场景的新数字图像。进行了两个实验,比较了当对象适应不同的亮度时在实际视觉检测任务上的性能,以及当他们观察模拟的适应效果时,当对象的适应水平保持恒定时在同一任务上的性能。结果表明,模拟产生的性能在与实际适应效果相同的方向上降低,但效果幅度较小。进行了第三个实验,以更好地量化模拟和实际适应条件之间的差异。该实验采用了标准化的视觉测试目标,即美国空军(USAF)1951年的测试模式。

著录项

  • 来源
    《Leukos》 |2008年第4期|31-55|共25页
  • 作者单位

    Now at Litecontrol, Inc;

    University of Colorado at Boulder;

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  • 原文格式 PDF
  • 正文语种 eng
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