标题： 人类眼睛诞生地的自然图像 显示英文标题

标题： Natural images from the birthplace of the human eye

摘要： 我们介绍了一个校准自然图像的数据库，可通过易于使用的网络界面公开获取。 使用尼康D70数码单反相机，我们获取了大约5000张六百万像素的博茨瓦纳奥卡万戈三角洲图像，这是一种类似于人类眼睛被认为进化而来的热带稀树草原栖息地。 一些图像序列是在跟随狒狒群时非系统地拍摄的，而其他图像则是设计用来改变单一参数，如光圈、物体距离、一天中的时间或地平线上的位置。 图像以原始RGB格式和灰度格式提供。 图像还以与人类锥形感光细胞生理学相关的单位提供，其中像素值表示对长波（L）、中波（M）和短波（S）敏感的锥形细胞每秒预期的光异构化次数。 该数据库根据知识共享署名-非商业性-无衍生作品许可协议进行分发，以促进计算机视觉、感知心理物理学和视觉神经科学的研究。 显示英文摘要

摘要： Here we introduce a database of calibrated natural images publicly available through an easy-to-use web interface. Using a Nikon D70 digital SLR camera, we acquired about 5000 six-megapixel images of Okavango Delta of Botswana, a tropical savanna habitat similar to where the human eye is thought to have evolved. Some sequences of images were captured unsystematically while following a baboon troop, while others were designed to vary a single parameter such as aperture, object distance, time of day or position on the horizon. Images are available in the raw RGB format and in grayscale. Images are also available in units relevant to the physiology of human cone photoreceptors, where pixel values represent the expected number of photoisomerizations per second for cones sensitive to long (L), medium (M) and short (S) wavelengths. This database is distributed under a Creative Commons Attribution-Noncommercial Unported license to facilitate research in computer vision, psychophysics of perception, and visual neuroscience.