对对Python3+gdal 读取读取tiff格式数据的实例讲解格式数据的实例讲解
今天小编就为大家分享一篇对Python3+gdal 读取tiff格式数据的实例讲解,具有很好的参考价值,希望对大家有
所帮助。一起跟随小编过来看看吧
1、遇到的问题:、遇到的问题:numpy版本版本
im_data = dataset.ReadAsArray(0,0,im_width,im_height)#获取数据 这句报错
升级numpy:pip install -U numpy 但是提示已经是最新版本
解决:卸载numpy 重新安装
2.直接从压缩包中读取直接从压缩包中读取tiff图像图像
参考:http://gdal.org/gdal_virtual_file_systems.html#gdal_virtual_file_systems_vsizip
当前情况是2层压缩: /'/vsitar/C:/Users/summer/Desktop/a_PAN1.tiff'
3.读读tiff
def readTif(fileName):
merge_img = 0
driver = gdal.GetDriverByName('GTiff')
driver.Register()
dataset = gdal.Open(fileName)
if dataset == None:
print(fileName+ "掩膜失败,文件无法打开")
return
im_width = dataset.RasterXSize #栅格矩阵的列数
print('im_width:', im_width)
im_height = dataset.RasterYSize #栅格矩阵的行数
print('im_height:', im_height)
im_bands = dataset.RasterCount #波段数
im_geotrans = dataset.GetGeoTransform()#获取仿射矩阵信息
im_proj = dataset.GetProjection()#获取投影信息
if im_bands == 1:
band = dataset.GetRasterBand(1)
im_data = dataset.ReadAsArray(0,0,im_width,im_height) #获取数据
cdata = im_data.astype(np.uint8)
merge_img = cv2.merge([cdata,cdata,cdata])
cv2.imwrite('C:/Users/summer/Desktop/a.jpg', merge_img)
#
elif im_bands == 4:
# # im_data = dataset.ReadAsArray(0,0,im_width,im_height)#获取数据
# # im_blueBand = im_data[0,0:im_width,0:im_height] #获取蓝波段
# # im_greenBand = im_data[1,0:im_width,0:im_height] #获取绿波段
# # im_redBand = im_data[2,0:im_width,0:im_height] #获取红波段
# # # im_nirBand = im_data[3,0:im_width,0:im_height] #获取近红外波段
# # merge_img=cv2.merge([im_redBand,im_greenBand,im_blueBand])
# # zeros = np.zeros([im_height,im_width],dtype = "uint8")
# # data1 = im_redBand.ReadAsArray
# band1=dataset.GetRasterBand(1)
# band2=dataset.GetRasterBand(2)
# band3=dataset.GetRasterBand(3)
# band4=dataset.GetRasterBand(4)
data1=band1.ReadAsArray(0,0,im_width,im_height).astype(np.uint16) #r #获取数据
data2=band2.ReadAsArray(0,0,im_width,im_height).astype(np.uint16) #g #获取数据
data3=band3.ReadAsArray(0,0,im_width,im_height).astype(np.uint16) #b #获取数据
data4=band4.ReadAsArray(0,0,im_width,im_height).astype(np.uint16) #R #获取数据
# print(data1[1][45])
# output1= cv2.convertScaleAbs(data1, alpha=(255.0/65535.0))
# print(output1[1][45])
# output2= cv2.convertScaleAbs(data2, alpha=(255.0/65535.0))
# output3= cv2.convertScaleAbs(data3, alpha=(255.0/65535.0))
merge_img1 = cv2.merge([output3,output2,output1]) #B G R
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