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ee.Image.select
コレクションでコンテンツを整理
必要に応じて、コンテンツの保存と分類を行います。
画像からバンドを選択します。
選択したバンドを含む画像を返します。
用途 | 戻り値 |
---|
Image.select(var_args) | 画像 |
引数 | タイプ | 詳細 |
---|
これ: image | 画像 | Image インスタンス。 |
var_args | VarArgs<Object> | 次のいずれかになります。
- リスト以外の引数を任意の数指定できます。これらはすべて帯域セレクタとして解釈されます。これらは、帯域名、正規表現、数値インデックスにできます。例: selected = image.select('a', 'b', 3, 'd');
- 2 つのリスト。1 つ目はバンド セレクタとして使用され、2 つ目は選択したバンドの新しい名前として使用されます。新しい名前の数は、選択した帯域の数と一致している必要があります。例: selected = image.select(['a', 4], ['newA', 'newB']);
|
例
コードエディタ(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 の設定
Python API とインタラクティブな開発での geemap
の使用については、
Python 環境のページをご覧ください。
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())
特に記載のない限り、このページのコンテンツはクリエイティブ・コモンズの表示 4.0 ライセンスにより使用許諾されます。コードサンプルは Apache 2.0 ライセンスにより使用許諾されます。詳しくは、Google Developers サイトのポリシーをご覧ください。Java は Oracle および関連会社の登録商標です。
最終更新日 2025-07-25 UTC。
[null,null,["最終更新日 2025-07-25 UTC。"],[[["\u003cp\u003e\u003ccode\u003eImage.select()\u003c/code\u003e is used to select specific bands from an image by their name, index, or using regular expressions.\u003c/p\u003e\n"],["\u003cp\u003eYou can provide band selectors as individual arguments, a single list, or two lists (one for selectors and one for new band names).\u003c/p\u003e\n"],["\u003cp\u003eThis method returns a new image containing only the selected bands, potentially with renamed bands if specified.\u003c/p\u003e\n"],["\u003cp\u003eRegular expressions provide a powerful way to select multiple bands matching a pattern.\u003c/p\u003e\n"]]],[],null,["# ee.Image.select\n\n\u003cbr /\u003e\n\nSelects bands from an image.\n\n\u003cbr /\u003e\n\nReturns an image with the selected bands.\n\n| Usage | Returns |\n|--------------------------|---------|\n| Image.select`(var_args)` | Image |\n\n| Argument | Type | Details |\n|---------------|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `image` | Image | The Image instance. |\n| `var_args` | VarArgs\\\u003cObject\\\u003e | One of two possibilities: - Any number of non-list arguments. All of these will be interpreted as band selectors. These can be band names, regexes, or numeric indices. E.g. selected = image.select('a', 'b', 3, 'd'); - Two lists. The first will be used as band selectors and the second as new names for the selected bands. The number of new names must match the number of selected bands. E.g. selected = image.select(\\['a', 4\\], \\['newA', 'newB'\\]); |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A Sentinel-2 surface reflectance image.\nvar img = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');\nprint('All band names', img.bandNames());\n\nprint('Select a band by name',\n img.select('B11').bandNames());\n\nprint('Select a band by index',\n img.select(10).bandNames());\n\nprint('Select bands using a list',\n img.select(['B11', 'B8', 'B3']).bandNames());\n\nprint('Select bands by an argument series',\n img.select('B11', 'B8', 'B3').bandNames());\n\nprint('Mixing string and integer selectors is valid',\n img.select(10, 'B8', 2).bandNames());\n\nprint('Rename selected bands using two corresponding lists',\n img.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green']).bandNames());\n\n// Use regular expressions to select bands.\nprint('Match \"QA\" followed by any two characters',\n img.select('QA..').bandNames());\n\nprint('Match \"B\" followed by any character, any number of times',\n img.select('B.*').bandNames());\n\nprint('Match \"B\" followed by any character, and any optional third character',\n img.select('B..?').bandNames());\n\nprint('Match \"B\" followed by a character in the range 6-8',\n img.select('B[6-8]').bandNames());\n\nprint('Match \"B\" followed by a character in the range 1-9 and then 1-2',\n img.select('B[1-9][1-2]').bandNames());\n\nprint('Match \"B\" or \"QA\" each followed by any character, any number of times.',\n img.select('B.*|QA.*').bandNames());\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# A Sentinel-2 surface reflectance image.\nimg = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG')\nprint('All band names:', img.bandNames().getInfo())\n\nprint('Select a band by name:', img.select('B11').bandNames().getInfo())\n\nprint('Select a band by index:', img.select(10).bandNames().getInfo())\n\nprint('Select bands using a list:',\n img.select(['B11', 'B8', 'B3']).bandNames().getInfo())\n\nprint('Select bands by an argument series:',\n img.select('B11', 'B8', 'B3').bandNames().getInfo())\n\nprint('Mixing string and integer selectors is valid:',\n img.select(10, 'B8', 2).bandNames().getInfo())\n\nprint('Rename selected bands using two corresponding lists:',\n img.select(['B11', 'B8', 'B3'], ['SWIR1', 'NIR', 'Green'])\n .bandNames().getInfo())\n\n# Use regular expressions to select bands.\nprint('Match \"QA\" followed by any two characters:',\n img.select('QA..').bandNames().getInfo())\n\nprint('Match \"B\" followed by any character, any number of times:',\n img.select('B.*').bandNames().getInfo())\n\nprint('Match \"B\" followed by any character, and any optional third character',\n img.select('B..?').bandNames().getInfo())\n\nprint('Match \"B\" followed by a character in the range 6-8',\n img.select('B[6-8]').bandNames().getInfo())\n\nprint('Match \"B\" followed by a character in the range 1-9 and then 1-2',\n img.select('B[1-9][1-2]').bandNames().getInfo())\n\nprint('Match \"B\" or \"QA\" each followed by any character, any number of times.',\n img.select('B.*|QA.*').bandNames().getInfo())\n```"]]