Announcement: On November 13, 2024, all users will need to use a Cloud project in order to access Earth Engine. After this date, continued individual access without a Cloud project will require an exception.
Stay organized with collections
Save and categorize content based on your preferences.
Subtracts the second value from the first for each matched pair of bands in image1 and image2. If either image1 or image2 has only 1 band, then it is used against all the bands in the other image. If the images have the same number of bands, but not the same names, they're used pairwise in the natural order. The output bands are named for the longer of the two inputs, or if they're equal in length, in image1's order. The type of the output pixels is the union of the input types.
Usage
Returns
Image.subtract(image2)
Image
Argument
Type
Details
this: image1
Image
The image from which the left operand bands are taken.
image2
Image
The image from which the right operand bands are taken.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[[["`subtract()` subtracts the pixel values of a second image from the first, band-by-band."],["If the images have differing band counts, single-band images are applied to all bands of the multi-band image, otherwise, bands are paired in order."],["Output band names follow the longer image's band names or the first image's if band counts are equal."],["The pixel type of the output image will accommodate the data types of both input images."]]],[]]