Announcement : All noncommercial projects registered to use Earth Engine before April 15, 2025 must verify noncommercial eligibility to maintain access. If you have not verified by September 26, 2025, your access may be on hold.

ee.Kernel.laplacian8

AI-generated Key Takeaways

ee.Kernel.laplacian8() generates a 3x3 Laplacian-8 edge-detection kernel.
The kernel can be scaled using the magnitude argument and normalized using the normalize argument.
The default output weights matrix is [[1, 1, 1], [1, -8, 1], [1, 1, 1]] .

Generates a 3x3 Laplacian-8 edge-detection kernel.

Usage	Returns
`ee.Kernel.laplacian8( magnitude , normalize )`	Kernel

Argument	Type	Details
`magnitude`	Float, default: 1	Scale each value by this amount.
`normalize`	Boolean, default: false	Normalize the kernel values to sum to 1.

Examples

Code Editor (JavaScript)

 print 
 ( 
 'A Laplacian-8 kernel' 
 , 
  
 ee 
 . 
 Kernel 
 . 
 laplacian8 
 ()); 
 /** 
 * Output weights matrix 
 * 
 * [1,  1, 1] 
 * [1, -8, 1] 
 * [1,  1, 1] 
 */

Python setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

 import 
  
 ee 
 import 
  
 geemap.core 
  
 as 
  
 geemap

Colab (Python)

 display 
 ( 
 'A Laplacian-8 kernel:' 
 , 
 ee 
 . 
 Kernel 
 . 
 laplacian8 
 ()) 
 #  Output weights matrix 
 #  [1,  1, 1] 
 #  [1, -8, 1] 
 #  [1,  1, 1]

ee.Kernel.laplacian8 Stay organized with collections Save and categorize content based on your preferences.

AI-generated Key Takeaways

Examples

Code Editor (JavaScript)

Colab (Python)

ee.Kernel.laplacian8