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首页> 外文会议>Biennial Workshop on Color Photography, Videography and Airborne Imaging for Resource Assessment >AN EVALUATION OF NEW HIGH-RESOLUTION IMAGE COLLECTION AND PROCESSING TECHNIQUES FOR ESTIMATING SHRUB COVER AND DETECTING LANDSCAPE CHANGES
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AN EVALUATION OF NEW HIGH-RESOLUTION IMAGE COLLECTION AND PROCESSING TECHNIQUES FOR ESTIMATING SHRUB COVER AND DETECTING LANDSCAPE CHANGES

机译：新型高分辨率图像收集和处理技术的评估，用于估计灌木覆盖和检测景观变化

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Research funded by the U. S. Department of Defense (DoD), U.S. Department of Energy (DOE), and the U.S. Environmental Protection Agency as part of the Strategic Environmental Research and Development Program (SERDP) evaluated novel techniques for collecting and processing high-resolution images in the Mojave Desert. Several camera types, lens, films, and digital processing techniques were evaluated on the basis of their ability to correctiy estimate canopy cover of shrubs. A high degree of accuracy was obtained with photo scales of 1:1000 to 1:4000 and flatbed scanning rates from films or prints of 300 lines per inch or larger. Smaller scale images were of value in detecting retrospective changes in cover of large shrubs, but failed to detect smaller shrubs. New image-processing software, typically used in tight microscopy, forensics, and industrial engineering, make it possible to accurately measure areas for total cover of up to four dominant shrub species in minutes compared to hours or days of field work. Canopy cover and individual shrub parameters such as width, length, circumference, and shape factors can be readily measured yielding size distribution histograms and other statistical data on plant community stmcture. These novel techniques are being evaluated in a four-year study of military training impacts at Fort Irwin, California. Results will be compared among the new and conventional imagery and processing, including 1-meter (m) pixel IKONOS images. The new processes create georectified color-coded contour maps of shrub cover for use with Geographic Information System (GIS) software. The technique is a valuable new emerging tool to accurately assess vegetation structure and landscape changes due to military or other land-use disturbances.
机译：研究由美国国防部国防部（DoD）的资助，能源部（DOE）和美国环境保护局的美国能源部的评估战略环境研究发展计划（SERDP）的一部分，用于收集和处理高分辨率图像的新技术在莫哈韦沙漠。在其矫正灌木矫正冠层覆盖的能力的基础上，评估了几种相机类型，镜片，薄膜和数字处理技术。使用1：1000至1：4000的光刻获得高精度，并且来自薄膜或300线/英寸或更大的印刷品的平板扫描速率。较小的刻度图像具有检测大灌木盖子的回顾性变化，但未检测到较小的灌木。新的图像处理软件通常用于紧密显微镜，取证和工业工程，可以在分钟内准确测量最多四个主要灌木种类的地区，而现场工作的小时数或天数。可以容易地测量宽度，长度，圆周和形状因子，例如宽度，长度，圆周和形状因子等单个灌木参数。在加利福尼亚州伊尔文堡的军事训练影响研究中正在评估这些新颖技术。结果将在新的和传统图像和处理中进行比较，包括1米（m）像素Ikonos图像。新进程创建了灌木盖的Georedized颜色编码轮廓图，以用于地理信息系统（GIS）软件。该技术是一种有价值的新兴工具，可以准确地评估由于军事或其他土地使用障碍而准确地评估植被结构和景观变化。

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