【摘要】 平面数字测量的精确度较高,准确度因测量项目的不同而不同。直线、角度测量时的准确度较高,所产生的误差与测量长度、距离和感光模式有关。直线测量的长度越长误差越小。角度测量时感光模式以2048×1530以上为宜。曲线、面积测量时误差较大,误差与鼠标的操控和性能有关,但面积测量的准确度可以达到很高的水平。颜色测量与感光模式无关,但受测量距离的远近影响,数据采集时最少应保持150cm以上的距离。数字测量可以准确地反映农作物在直线、角度和颜色方面的日变化,对叶色可以以数字方式进行记录。更多还原

【Abstract】 The precision of digital measurement of plane is higher, degree of accuracy is different acconding to the measure project.The beeline and angle, degree of accuracy at the time of measurement are higher, the errors that are produced relate to length of measurement、 distance and sensitization mode. The longer the length of beeline measurement is,the less the error is. The sensitization mode is suitable for more than 2048*1530 at the time of angle measurement.For measurements of curve and area, the error is greater at the time of measurement. The error was related with the performance and controlling of mouse with.But the degree of accuracy of area measurement can reach very high level. Color measurement has nothing to do with mode of sensitization, The degree of accuracy is influenced by the distance of digital measurement, The distance should keep 150 cm at least. Digital measurement can reflect accurately the daily cnanges of crops in aspects of beeline、angle and color.The leaf color can be recorded digital.更多还原