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ee.Image.select
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
从图像中选择波段。
返回包含所选波段的图像。
用法 | 返回 |
---|
Image.select(var_args) | 图片 |
参数 | 类型 | 详细信息 |
---|
此:image | 图片 | Image 实例。 |
var_args | VarArgs<Object> | 有两种可能:
- 任意数量的非列表实参。所有这些都将被解读为频段选择器。这些值可以是频段名称、正则表达式或数字指数。例如,selected = image.select('a', 'b', 3, 'd');
- 两个列表。第一个将用作频段选择器,第二个将用作所选频段的新名称。新名称的数量必须与所选频段的数量一致。例如,selected = image.select(['a', 4], ['newA', 'newB']);
|
示例
代码编辑器 (JavaScript)
// A Sentinel-2 surface reflectance image.
var img = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');
print('All band names', img.bandNames());
print('Select a band by name',
img.select('B11').bandNames());
print('Select a band by index',
img.select(10).bandNames());
print('Select bands using a list',
img.select(['B11', 'B8', 'B3']).bandNames());
print('Select bands by an argument series',
img.select('B11', 'B8', 'B3').bandNames());
print('Mixing string and integer selectors is valid',
img.select(10, 'B8', 2).bandNames());
print('Rename selected bands using two corresponding lists',
img.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green']).bandNames());
// Use regular expressions to select bands.
print('Match "QA" followed by any two characters',
img.select('QA..').bandNames());
print('Match "B" followed by any character, any number of times',
img.select('B.*').bandNames());
print('Match "B" followed by any character, and any optional third character',
img.select('B..?').bandNames());
print('Match "B" followed by a character in the range 6-8',
img.select('B[6-8]').bandNames());
print('Match "B" followed by a character in the range 1-9 and then 1-2',
img.select('B[1-9][1-2]').bandNames());
print('Match "B" or "QA" each followed by any character, any number of times.',
img.select('B.*|QA.*').bandNames());
Python 设置
如需了解 Python API 和如何使用 geemap
进行交互式开发,请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# A Sentinel-2 surface reflectance image.
img = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG')
print('All band names:', img.bandNames().getInfo())
print('Select a band by name:', img.select('B11').bandNames().getInfo())
print('Select a band by index:', img.select(10).bandNames().getInfo())
print('Select bands using a list:',
img.select(['B11', 'B8', 'B3']).bandNames().getInfo())
print('Select bands by an argument series:',
img.select('B11', 'B8', 'B3').bandNames().getInfo())
print('Mixing string and integer selectors is valid:',
img.select(10, 'B8', 2).bandNames().getInfo())
print('Rename selected bands using two corresponding lists:',
img.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green'])
.bandNames().getInfo())
# Use regular expressions to select bands.
print('Match "QA" followed by any two characters:',
img.select('QA..').bandNames().getInfo())
print('Match "B" followed by any character, any number of times:',
img.select('B.*').bandNames().getInfo())
print('Match "B" followed by any character, and any optional third character',
img.select('B..?').bandNames().getInfo())
print('Match "B" followed by a character in the range 6-8',
img.select('B[6-8]').bandNames().getInfo())
print('Match "B" followed by a character in the range 1-9 and then 1-2',
img.select('B[1-9][1-2]').bandNames().getInfo())
print('Match "B" or "QA" each followed by any character, any number of times.',
img.select('B.*|QA.*').bandNames().getInfo())
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-25。
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