Stay organized with collectionsSave and categorize content based on your preferences.
To reduce anImage, useimage.reduce(). Reducing an image
functions in an analogous way toimageCollection.reduce(), except the
bands of the image are input to the reducer rather than the images in the collection. The
output is also an image with number of bands equal to number of reducer outputs. For
example:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-01-02 UTC."],[[["\u003cp\u003e\u003ccode\u003eimage.reduce()\u003c/code\u003e processes an image's bands with a reducer, similar to how \u003ccode\u003eimageCollection.reduce()\u003c/code\u003e processes images in a collection.\u003c/p\u003e\n"],["\u003cp\u003eIt outputs a new image with band count equal to the reducer's output count, for instance, using \u003ccode\u003eee.Reducer.max()\u003c/code\u003e results in a single-band image with the maximum value across the input bands.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code demonstrates reducing a Landsat 8 image to a single-band image representing the maximum value across selected bands (B4, B3, B2).\u003c/p\u003e\n"]]],[],null,["# Image Reductions\n\nTo reduce an `Image`, use `image.reduce()`. Reducing an image\nfunctions in an analogous way to `imageCollection.reduce()`, except the\nbands of the image are input to the reducer rather than the images in the collection. The\noutput is also an image with number of bands equal to number of reducer outputs. For\nexample:\n\n### Code Editor (JavaScript)\n\n```javascript\n// Load an image and select some bands of interest.\nvar image = ee.Image('LANDSAT/LC08/C02/T1/LC08_044034_20140318')\n .select(['B4', 'B3', 'B2']);\n\n// Reduce the image to get a one-band maximum value image.\nvar maxValue = image.reduce(ee.Reducer.max());\n\n// Display the result.\nMap.centerObject(image, 10);\nMap.addLayer(maxValue, {max: 13000}, 'Maximum value image');\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# Load an image and select some bands of interest.\nimage = ee.Image('LANDSAT/LC08/C02/T1/LC08_044034_20140318').select(\n ['B4', 'B3', 'B2']\n)\n\n# Reduce the image to get a one-band maximum value image.\nmax_value = image.reduce(ee.Reducer.max())\n\n# Display the result.\nm = geemap.Map()\nm.center_object(image, 10)\nm.add_layer(max_value, {'max': 13000}, 'Maximum value image')\nm\n```"]]
