Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Kernel.plus
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Menghasilkan kernel boolean berbentuk plus.
| Penggunaan | Hasil |
|---|
ee.Kernel.plus(radius, units, normalize, magnitude) | Kernel |
| Argumen | Jenis | Detail |
|---|
radius | Float | Radius kernel yang akan dibuat. |
units | String, default: "pixels" | Sistem pengukuran untuk kernel ('piksel' atau 'meter'). Jika kernel ditentukan dalam meter, kernel akan diubah ukurannya saat level zoom diubah. |
normalize | Boolean, default: benar (true) | Menormalisasi nilai kernel agar berjumlah 1. |
magnitude | Float, default: 1 | Menskalakan setiap nilai dengan jumlah ini. |
Contoh
Code Editor (JavaScript)
print('A plus kernel', ee.Kernel.plus({radius: 3}));
/**
* Output weights matrix (1/1000 precision shown for brevity)
*
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
* [0.076, 0.076, 0.076, 0.076, 0.076, 0.076, 0.076]
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
* [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
*/
Penyiapan Python
Lihat halaman
Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan
geemap untuk pengembangan interaktif.
import ee
import geemap.core as geemap
Colab (Python)
from pprint import pprint
print('A plus kernel:')
pprint(ee.Kernel.plus(**{'radius': 3}).getInfo())
# Output weights matrix (1/1000 precision shown for brevity)
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
# [0.076, 0.076, 0.076, 0.076, 0.076, 0.076, 0.076]
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003eGenerates a plus-shaped kernel (a matrix of weights) for image processing.\u003c/p\u003e\n"],["\u003cp\u003eThe kernel's radius, units of measurement, normalization, and magnitude can be customized.\u003c/p\u003e\n"],["\u003cp\u003eBy default, the kernel values are normalized to sum to 1 and have a magnitude of 1.\u003c/p\u003e\n"],["\u003cp\u003eThis kernel can be applied to images to perform operations like edge detection or feature extraction where a cross-shaped neighborhood is relevant.\u003c/p\u003e\n"]]],["A plus-shaped kernel is generated using `ee.Kernel.plus`, taking a `radius` to define its size. The `units` parameter, defaulting to 'pixels', can be set to 'meters' for zoom-responsive sizing. The kernel values can be normalized to sum to 1 with the `normalize` parameter (default true) or scaled by a `magnitude`. The kernel output is shown as a matrix with weighted values.\n"],null,["# ee.Kernel.plus\n\nGenerates a plus-shaped boolean kernel.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------------------------------------------------|---------|\n| `ee.Kernel.plus(radius, `*units* `, `*normalize* `, `*magnitude*`)` | Kernel |\n\n| Argument | Type | Details |\n|-------------|---------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `radius` | Float | The radius of the kernel to generate. |\n| `units` | String, default: \"pixels\" | The system of measurement for the kernel ('pixels' or 'meters'). If the kernel is specified in meters, it will resize when the zoom-level is changed. |\n| `normalize` | Boolean, default: true | Normalize the kernel values to sum to 1. |\n| `magnitude` | Float, default: 1 | Scale each value by this amount. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint('A plus kernel', ee.Kernel.plus({radius: 3}));\n\n/**\n * Output weights matrix (1/1000 precision shown for brevity)\n *\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n * [0.076, 0.076, 0.076, 0.076, 0.076, 0.076, 0.076]\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n * [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n */\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\nfrom pprint import pprint\n\nprint('A plus kernel:')\npprint(ee.Kernel.plus(**{'radius': 3}).getInfo())\n\n# Output weights matrix (1/1000 precision shown for brevity)\n\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n# [0.076, 0.076, 0.076, 0.076, 0.076, 0.076, 0.076]\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n# [0.000, 0.000, 0.000, 0.076, 0.000, 0.000, 0.000]\n```"]]
