Duyuru:
15 Nisan 2025'ten önce Earth Engine'i kullanmak için kaydedilen tüm ticari olmayan projelerin Earth Engine erişimini sürdürmek için
ticari olmayan uygunluğu doğrulaması gerekir.
ee.Image.arrayAccum
Koleksiyonlar ile düzeninizi koruyun
İçeriği tercihlerinize göre kaydedin ve kategorilere ayırın.
Sonuç dizisi pikselinin her bir öğesini, pikseldeki öğelerin verilen eksen boyunca azaltılmasına (eksende geçerli konum dahil) ayarlayarak her dizi pikselinin öğelerini verilen eksen boyunca biriktirir. Kümülatif toplam, monoton olarak artan sıra vb. oluşturmak için kullanılabilir.
Kullanım | İadeler |
---|
Image.arrayAccum(axis, reducer) | Resim |
Bağımsız Değişken | Tür | Ayrıntılar |
---|
bu: input | Resim | Giriş resmi. |
axis | Tamsayı | Kümülatif toplamın gerçekleştirileceği eksen. |
reducer | Küçültücü, varsayılan: boş | Değerleri biriktirmek için kullanılan azaltıcı. Varsayılan olarak SUM'dır. Belirtilen eksen boyunca her vektörün kümülatif toplamını oluşturur. |
Örnekler
Kod Düzenleyici (JavaScript)
// A function to print the array for a selected pixel in the following examples.
function sampArrImg(arrImg) {
var point = ee.Geometry.Point([-121, 42]);
return arrImg.sample(point, 500).first().get('array');
}
// Create a 1D array image.
var arrayImg1D = ee.Image([1, 2, 3]).toArray();
print('1D array image (pixel)', sampArrImg(arrayImg1D));
// [1, 2, 3]
// Perform accumulation procedures along axes using ee.Reducer functions.
// Here we calculate the cumulative sum along the 0-axis for a 1D array.
var accumSum1DAx0 = arrayImg1D.arrayAccum(0, ee.Reducer.sum());
print('Cumulative sum along 0-axis', sampArrImg(accumSum1DAx0));
// [1, 3, 6]
// Create a 2D 3x3 array image.
var arrayImg2D = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray()
.arrayReshape(ee.Image([3, 3]).toArray(), 2);
print('2D 3x3 array image (pixel)', sampArrImg(arrayImg2D));
// [[1, 2, 3],
// [4, 5, 6],
// [7, 8, 9]]
// Calculate the cumulative sum along the 0-axis for a 2D array.
var accumSum2DAx0 = arrayImg2D.arrayAccum(0, ee.Reducer.sum());
print('Cumulative sum along 0-axis', sampArrImg(accumSum2DAx0));
// [[ 1, 2, 3],
// [ 5, 7, 9],
// [12, 15, 18]]
// Calculate the cumulative sum along the 1-axis for a 2D array.
var accumSum2DAx1 = arrayImg2D.arrayAccum(1, ee.Reducer.sum());
print('Cumulative sum along 1-axis', sampArrImg(accumSum2DAx1));
// [[1, 3, 6],
// [4, 9, 15],
// [7, 15, 24]]
Python kurulumu
Python API'si ve etkileşimli geliştirme için geemap
kullanımı hakkında bilgi edinmek üzere
Python Ortamı sayfasına bakın.
import ee
import geemap.core as geemap
Colab (Python)
# A function to print the array for a selected pixel in the following examples.
def samp_arr_img(arr_img):
point = ee.Geometry.Point([-121, 42])
return arr_img.sample(point, 500).first().get('array')
# Create a 1D array image.
array_img_1d = ee.Image([1, 2, 3]).toArray()
print('1D array image (pixel):', samp_arr_img(array_img_1d).getInfo())
# [1, 2, 3]
# Perform accumulation procedures along axes using ee.Reducer functions.
# Here we calculate the cumulative sum along the 0-axis for a 1D array.
accum_sum_1d_ax0 = array_img_1d.arrayAccum(0, ee.Reducer.sum())
print('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_1d_ax0).getInfo())
# [1, 3, 6]
# Create a 2D 3x3 array image.
array_img_2d = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray().arrayReshape(
ee.Image([3, 3]).toArray(),
2)
print('2D 3x3 array image (pixel):', samp_arr_img(array_img_2d).getInfo())
# [[1, 2, 3],
# [4, 5, 6],
# [7, 8, 9]]
# Calculate the cumulative sum along the 0-axis for a 2D array.
accum_sum_2d_ax0 = array_img_2d.arrayAccum(0, ee.Reducer.sum())
print('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_2d_ax0).getInfo())
# [[ 1, 2, 3],
# [ 5, 7, 9],
# [12, 15, 18]]
# Calculate the cumulative sum along the 1-axis for a 2D array.
accum_sum_2d_ax1 = array_img_2d.arrayAccum(1, ee.Reducer.sum())
print('Cumulative sum along 1-axis:', samp_arr_img(accum_sum_2d_ax1).getInfo())
# [[1, 3, 6],
# [4, 9, 15],
# [7, 15, 24]]
Aksi belirtilmediği sürece bu sayfanın içeriği Creative Commons Atıf 4.0 Lisansı altında ve kod örnekleri Apache 2.0 Lisansı altında lisanslanmıştır. Ayrıntılı bilgi için Google Developers Site Politikaları'na göz atın. Java, Oracle ve/veya satış ortaklarının tescilli ticari markasıdır.
Son güncelleme tarihi: 2025-07-26 UTC.
[null,null,["Son güncelleme tarihi: 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003eImage.arrayAccum()\u003c/code\u003e calculates the cumulative reduction of elements within each pixel of an array image along a specified axis.\u003c/p\u003e\n"],["\u003cp\u003eIt uses a reducer (defaulting to sum) to determine how elements are accumulated, producing a new array image.\u003c/p\u003e\n"],["\u003cp\u003eThe axis argument specifies the direction of accumulation (0 for rows, 1 for columns in 2D arrays).\u003c/p\u003e\n"],["\u003cp\u003eThis function is useful for generating cumulative sums, monotonically increasing sequences, and other cumulative calculations within array images.\u003c/p\u003e\n"],["\u003cp\u003eIt's applicable to both 1D and multidimensional array images in Earth Engine.\u003c/p\u003e\n"]]],[],null,["# ee.Image.arrayAccum\n\nAccumulates elements of each array pixel along the given axis, by setting each element of the result array pixel to the reduction of elements in that pixel along the given axis, up to and including the current position on the axis. May be used to make a cumulative sum, a monotonically increasing sequence, etc.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------------------|---------|\n| Image.arrayAccum`(axis, `*reducer*`)` | Image |\n\n| Argument | Type | Details |\n|---------------|------------------------|------------------------------------------------------------------------------------------------------------------|\n| this: `input` | Image | Input image. |\n| `axis` | Integer | Axis along which to perform the cumulative sum. |\n| `reducer` | Reducer, default: null | Reducer to accumulate values. Default is SUM, to produce the cumulative sum of each vector along the given axis. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A function to print the array for a selected pixel in the following examples.\nfunction sampArrImg(arrImg) {\n var point = ee.Geometry.Point([-121, 42]);\n return arrImg.sample(point, 500).first().get('array');\n}\n\n// Create a 1D array image.\nvar arrayImg1D = ee.Image([1, 2, 3]).toArray();\nprint('1D array image (pixel)', sampArrImg(arrayImg1D));\n// [1, 2, 3]\n\n// Perform accumulation procedures along axes using ee.Reducer functions.\n// Here we calculate the cumulative sum along the 0-axis for a 1D array.\nvar accumSum1DAx0 = arrayImg1D.arrayAccum(0, ee.Reducer.sum());\nprint('Cumulative sum along 0-axis', sampArrImg(accumSum1DAx0));\n// [1, 3, 6]\n\n// Create a 2D 3x3 array image.\nvar arrayImg2D = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray()\n .arrayReshape(ee.Image([3, 3]).toArray(), 2);\nprint('2D 3x3 array image (pixel)', sampArrImg(arrayImg2D));\n// [[1, 2, 3],\n// [4, 5, 6],\n// [7, 8, 9]]\n\n// Calculate the cumulative sum along the 0-axis for a 2D array.\nvar accumSum2DAx0 = arrayImg2D.arrayAccum(0, ee.Reducer.sum());\nprint('Cumulative sum along 0-axis', sampArrImg(accumSum2DAx0));\n// [[ 1, 2, 3],\n// [ 5, 7, 9],\n// [12, 15, 18]]\n\n// Calculate the cumulative sum along the 1-axis for a 2D array.\nvar accumSum2DAx1 = arrayImg2D.arrayAccum(1, ee.Reducer.sum());\nprint('Cumulative sum along 1-axis', sampArrImg(accumSum2DAx1));\n// [[1, 3, 6],\n// [4, 9, 15],\n// [7, 15, 24]]\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 function to print the array for a selected pixel in the following examples.\ndef samp_arr_img(arr_img):\n point = ee.Geometry.Point([-121, 42])\n return arr_img.sample(point, 500).first().get('array')\n\n# Create a 1D array image.\narray_img_1d = ee.Image([1, 2, 3]).toArray()\nprint('1D array image (pixel):', samp_arr_img(array_img_1d).getInfo())\n# [1, 2, 3]\n\n# Perform accumulation procedures along axes using ee.Reducer functions.\n# Here we calculate the cumulative sum along the 0-axis for a 1D array.\naccum_sum_1d_ax0 = array_img_1d.arrayAccum(0, ee.Reducer.sum())\nprint('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_1d_ax0).getInfo())\n# [1, 3, 6]\n\n# Create a 2D 3x3 array image.\narray_img_2d = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray().arrayReshape(\n ee.Image([3, 3]).toArray(),\n 2)\nprint('2D 3x3 array image (pixel):', samp_arr_img(array_img_2d).getInfo())\n# [[1, 2, 3],\n# [4, 5, 6],\n# [7, 8, 9]]\n\n# Calculate the cumulative sum along the 0-axis for a 2D array.\naccum_sum_2d_ax0 = array_img_2d.arrayAccum(0, ee.Reducer.sum())\nprint('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_2d_ax0).getInfo())\n# [[ 1, 2, 3],\n# [ 5, 7, 9],\n# [12, 15, 18]]\n\n# Calculate the cumulative sum along the 1-axis for a 2D array.\naccum_sum_2d_ax1 = array_img_2d.arrayAccum(1, ee.Reducer.sum())\nprint('Cumulative sum along 1-axis:', samp_arr_img(accum_sum_2d_ax1).getInfo())\n# [[1, 3, 6],\n# [4, 9, 15],\n# [7, 15, 24]]\n```"]]