仪器响应 传感器测量的是某一时段内的,某一光谱波段内 的和某一空间尺度内的信号。 o=Ji(x.y.)p(x.y,Adxdydidt 2
2 仪器响应 传感器测量的是某一时段内的,某一光谱波段内 的和某一空间尺度内的信号。 o i ddd (, , ,) (, , ) xy xy t t x y d UESTC-RSIP
空间分辨率 传感器的图像空间分辨率通常表示为G$I (Ground-projected Sample Interval)或者 GIFOV(Ground-projected Instantaneous Field of View),它通常用来表示仪器能够检测到的较小 物体的能力。 3
3 空间分辨率 传感器的图像空间分辨率通常表示为GSI (Ground-projected Sample Interval)或者 GIFOV(Ground-projected Instantaneous Field of View),它通常用来表示仪器能够检测到的较小 物体的能力。 UESTC-RSIP
Imagery of Harbor Town in Hilton Head,SC,at Various Nominal Spatial Resolutions a.0.5x0.5m b.I x 1 m. c.2.5x2.5m. 。 d.5 x 5 m. e.10x10m f20x20m. Nominal Spatial Resolution (enlarged view) 80 Ground-projected instantaneous- field-of-view 30 5- 6 g.40x40m. h.80x80m. i1020 80m
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a.Landsat ETM+ b.ATLAS c.QuickBird Figure.Portions of imagery for the same location from a.Landsat ETM+,b. ATLAS and c.QuickBird.As image resolution increases,the scale ofobjects that is readily discernible decreases. 7
7 Figure. Portions of imagery for the same location from a. Landsat ETM+, b. ATLAS and c. QuickBird. As image resolution increases, the scale of objects that is readily discernible decreases. UESTC-RSIP