MODEL-BASED IMAGE ENHANCEMENT FOR THE VISUALLY IMPAIRED

视频图像的增强应使视力受损的人 可以收看电视。和其他视频来源。在前几年，相比之下， 提出了一种基于带通滤波方法的增强算法 测试过。结果令人鼓舞，显示Face的表现有所改善 在识别和从运动视频中获取细节方面。添加 通过解决空间视觉的其他方面，将获得改进 超过了对比度敏感度的损失。我们会研究，在病人身上 对于中心暗点，添加的宽带要素标记可提高 在局部化、同相(形)辨别方面的表现 任务，由正常视力进行的研究所建议的 研究对象。利用这些研究的结果，我们开发了一种新的 对先前使用的增强方法的扩展，即宽带 增强功能应该有很多优势。将新方法作为 类似卡通的条形轮廓(双极光和暗)和增加 边缘特征的对比度有助于定位和 歧视。我们将确定这样的光学参数 对中枢性暗点患者的增强，实施软件 基于生成增强运动视频段的方法并使用 用来衡量视障人士对 增强版。我们将继续发展我们的视觉模式，并 将其应用于图像的开发、评价和优化 为视障人士提供的增强功能。这项研究的基本方面 将检查发生在周边视觉中的适应变化 有长期中心视力丧失的处理。我们将研究性能 Long患者在视觉任务数上的差异 术语双侧暗点和单侧暗点。的研究。 单眼暗点的患者将提供更好的测量 外周视网膜的能力。单目眼镜的区别 和双侧暗点患者的表现将改善我们的 对外周视网膜或外周视网膜压力的适应 形成视觉。长期促进低视力患者的研究将 用来搜索一种视觉功能的测量方法，这将解释和 量化周边视网膜的缺陷，如轮廓积分。这个 基础研究结果将指导进一步的微调和优化 增强技术的一部分。

Enhancement of video images should enable the visual impaired greater access to TV. and other video sources. In previous years, contrast enhancement based on a band-pass filtering approach was developed and tested. Results were encouraging, showing improved performance in face recognition and in obtaining details from motion videos. Addition improvement will be gained by addressing other aspects of spatial vision beyond the loss of contrast sensitivity. We will study, in patients with central scotomas, the addition of wide-band feature markers improve the performance in localization, and in phase (shape) discrimination tasks, as suggested by studies carried out with normally sighted subjects. Using the results of these studies, we developed a novel extension of the previously used enhancement method, a wide-band enhancement that should have many advantages. The new method as a cartoon-like bar outlines (bipolar light and darkness) and increase the contrast of edge features to facilitate localization and discrimination. We will determine the optical parameters for such enhancement for patients with central scotomas, implement a software based approach to generate enhanced motion video segments and use such segments to measure the preference of visually impaired persons for the enhanced versions. We will continue to develop our visual model, and to use it in the development, evaluation and optimization of image enhancement for the visually impaired. The basic aspect of the study will examine changes in adaptation that occur in the peripheral visual processing with long term central visual loss. We will study performance differences on the number of visual tasks between patients with long term bilateral scotomas and with unilateral scotomas. The study of patients with monocular scotomas will provide better measure of the capability of the peripheral retina. The differences between monocular and bilateral scotomas patients performance will improve our understanding of adaptation to the force used of peripheral retina or form vision. Studies of long term facilitation low vision patients will be used in search for a measure of visual function that will explain and quantify deficit in peripheral retinal such as contour integration. The basic studies results will guide further fine tuning and optimization of the enhancement technique.