题目内容
（请给出正确答案）
A.植被
B.道路
C.干土
D.建筑物
参考答案
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
网友提供的答案
更多“彩色红外影像上水体呈现黑色，而（）呈现红色。”相关的问题
A. 靶环最中心的颜色为黄色
B. 奥运会项目为男女个人全能和男女团体
C. 个人比赛时先射近距离，再射远距离
D. 单轮比赛为8个射程，每一射程36箭，共射288支箭
Please translate this passage into Chinese： In general terms, an image is a digital picture or representation of an object. Remotely sensed image data are digital representations of the Earth. Image data are stored in data files, also called image files, on magnetic tapes, computer disks, or other media. The data consist only of numbers. These representations form images when they are displayed on a screen or are output to hardcopy. Each number in an image file is a data file value. Data file values are sometimes referred to as pixels. The term pixel is abbreviated from picture element. A pixel is the smallest part of a picture (the area being scanned) with a single value. The data file value is the measured brightness value of the pixel at a specific wavelength. Raster image data are laid out in a grid similar to the squares on a checkerboard. Each cell of the grid is represented by a pixel, also known as a grid cell. In remotely sensed image data, each pixel represents an area of the Earth at a specific location. The data file value assigned to that pixel is the record of reflected radiation or emitted heat from the Earth’s surface at that location.
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