用法 | 返回 |
---|---|
Image.arrayRepeat(axis, copies) | 图片 |
参数 | 类型 | 详细信息 |
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此:input | 图片 | 要重复的数组像素的图片。 |
axis | 整数 | 重复每个像素数组所沿的轴。 |
copies | 图片 | 每个像素的副本数。 |
示例
代码编辑器 (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([0, 1, 2]).toArray(); print('1D array image (pixel)', sampArrImg(arrayImg1D)); // [0, 1, 2] // Repeat a 1D array along the 0-axis 3 times. var repeat1DAx0 = arrayImg1D.arrayRepeat(0, 3); print('1D array repeated 3 times on 0-axis', sampArrImg(repeat1DAx0)); // [0, 1, 2, 0, 1, 2, 0, 1, 2] // Repeat a 1D array along the 1-axis 3 times (expands the dimensions). var repeat1DAx1 = arrayImg1D.arrayRepeat(1, 3); print('1D array repeated 3 times on 1-axis', sampArrImg(repeat1DAx1)); // [[0, 0, 0], // [1, 1, 1], // [2, 2, 2]] // Repeat a 2D array along the 0-axis 2 times. var repeat2DAx0 = repeat1DAx1.arrayRepeat(0, 2); print('2D array repeated 2 times on 0-axis', sampArrImg(repeat2DAx0)); // [[0, 0, 0], // [1, 1, 1], // [2, 2, 2], // [0, 0, 0], // [1, 1, 1], // [2, 2, 2]] // Repeat a 2D array along the 1-axis 2 times. var repeat2DAx1 = repeat1DAx1.arrayRepeat(1, 2); print('2D array repeated 2 times on 1-axis', sampArrImg(repeat2DAx1)); // [[0, 0, 0, 0, 0, 0], // [1, 1, 1, 1, 1, 1], // [2, 2, 2, 2, 2, 2]]
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([0, 1, 2]).toArray() print('1D array image (pixel):', samp_arr_img(array_img_1d).getInfo()) # [0, 1, 2] # Repeat a 1D array along the 0-axis 3 times. repeat_1d_ax0 = array_img_1d.arrayRepeat(0, 3) print( '1D array repeated 3 times on 0-axis:', samp_arr_img(repeat_1d_ax0).getInfo() ) # [0, 1, 2, 0, 1, 2, 0, 1, 2] # Repeat a 1D array along the 1-axis 3 times (expands the dimensions). repeat_1d_ax1 = array_img_1d.arrayRepeat(1, 3) print( '1D array repeated 3 times on 1-axis:', samp_arr_img(repeat_1d_ax1).getInfo() ) # [[0, 0, 0], # [1, 1, 1], # [2, 2, 2]] # Repeat a 2D array along the 0-axis 2 times. repeat_2d_ax0 = repeat_1d_ax1.arrayRepeat(0, 2) print( '2D array repeated 2 times on 0-axis:', samp_arr_img(repeat_2d_ax0).getInfo() ) # [[0, 0, 0], # [1, 1, 1], # [2, 2, 2], # [0, 0, 0], # [1, 1, 1], # [2, 2, 2]] # Repeat a 2D array along the 1-axis 2 times. repeat_2d_ax1 = repeat_1d_ax1.arrayRepeat(1, 2) print( '2D array repeated 2 times on 1-axis:', samp_arr_img(repeat_2d_ax1).getInfo() ) # [[0, 0, 0, 0, 0, 0], # [1, 1, 1, 1, 1, 1], # [2, 2, 2, 2, 2, 2]]