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我正在尝试使用 geojson 中的形状来掩盖图像。

我要做的第一件事是获取图像中代表我的经纬度坐标的像素。

当我获得该信息时,我使用该坐标构建了一个“多边形”,然后尝试裁剪图像,但出现此错误:

“numpy.ndarray”对象不可调用

请注意,绝对路径是指.jp2文件。

geoms = [{'type':'Polygon', 'coordinates': [[(x1,y1),(x2,y2),(x3,y3),(x4,y4)]]}]

with rasterio.open(absolutePath) as src:
    out_image,out_transform = mask(src,geoms,crop=True)
out_meta = src.meta.copy()

我也尝试使用第一个坐标作为第五个坐标来“密封”多边形,但没有任何改变。

我得到的唯一错误信息是:

TypeErrorTraceback (most recent call last)
<ipython-input-13-796462428f9b> in <module>()
      2 
      3 with rasterio.open(absolutePath) as src:
----> 4     out_image,out_transform = mask(src,geoms,crop=True)
      5 out_meta = src.meta.copy()

TypeError: 'numpy.ndarray' object is not callable

这是我所有的全部代码:

from snappy import ProductIO
from snappy import PixelPos, GeoPos
import numpy as np
import geojson
import cv2
import os
import rasterio
from rasterio.mask import mask

path = '/home/.../x.SAFE'
product = ProductIO.readProduct(path)
sg = product.getSceneGeoCoding()

pathGeoJson = '/home/.../x.geojson'
with open(pathGeoJson) as f:
    gj = geojson.load(f)
features = gj['features'][0]
latlon1 = features.geometry.coordinates[0][0]
latlon2 = features.geometry.coordinates[0][1]
latlon3 = features.geometry.coordinates[0][2]
latlon4 = features.geometry.coordinates[0][3]

geoms = gj['features'][0].geometry
geoms

def LatLon_from_XY(ProductSceneGeoCoding, x, y):
    geoPos = ProductSceneGeoCoding.getGeoPos(PixelPos(x,y),None)
    lat = geoPos.getLat()
    lon = geoPos.getLon()
    return lat,lon

def XY_from_LatLon(ProductSceneGeoCoding, latitude, longitude):
    pixelPos = ProductSceneGeoCoding.getPixelPos(GeoPos(latitude, longitude),None)
    x = np.round(pixelPos.getX())
    y = np.round(pixelPos.getY())
    return x,y

x1,y1 = XY_from_LatLon(sg,latlon1[0], latlon1[1])
x2,y2 = XY_from_LatLon(sg,latlon2[0], latlon2[1])
x3,y3 = XY_from_LatLon(sg,latlon3[0], latlon3[1])
x4,y4 = XY_from_LatLon(sg,latlon4[0], latlon4[1])

print(x1,y1)
print(x2,y2)
print(x3,y3)
print(x4,y4)

pathToJP2 = '/home/.../IMG_DATA/'
arr = os.listdir(pathToJP2)

absolutePath = pathToJP2+arr[1]
arr[1]
print(absolutePath)

geoms = [{'type':'Polygon', 'coordinates': [[(x1,y1),(x2,y2),(x3,y3),(x4,y4)]]}]

with rasterio.open(absolutePath) as src:
    out_image,out_transform = mask(src,geoms,crop=True)
out_meta = src.meta.copy()
4

1 回答 1

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您可以使用 opencv 进行裁剪,甚至可以使用遮罩, 在这里得到更好的回答

于 2018-09-20T11:31:48.537 回答