如何在python中读取大的tif文件? [英] How to read a big tif file in python?

问题描述

我正在从 http://oceancolor.gsfc.nasa.gov加载tiff文件/DOCS/DistFromCoast/

from PIL import Image
im = Image.open('GMT_intermediate_coast_distance_01d.tif')

数据很大(im.size=(36000, 18000) 1.3GB)，常规转换无效；即imarray.shape返回()

The data is large (im.size=(36000, 18000) 1.3GB) and conventional conversion doesn't work; i.e, imarray.shape returns ()

import numpy as np 
imarray=np.zeros(im.size)
imarray=np.array(im)

如何将该tiff文件转换为numpy.array?

How can I convert this tiff file to a numpy.array?

推荐答案

到目前为止，我已经测试了许多替代方法，但只有 gdal 即使使用巨大的16位图像也始终可以工作.

So far I have tested many alternatives but only gdal worked always even with huge 16bit images.

您可以使用以下方式打开图像:

You can open an image with something like this:

from osgeo import gdal
import numpy as np
ds = gdal.Open("name.tif")
channel = np.array(ds.GetRasterBand(1).ReadAsArray())

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