[Qgis-developer] QGIS Python AddMaplayer but with low resolution

[dingnan]

Hello, I'm new to QGIS Python develop. I was trying to add raster layer (.asc
file) into QGIS. Below are my srcrips. 

from qgis.PyQt.QtCore import *
import gdal
import os

filePath = "path/2017011003.asc"
style_layer = "path/StreamStyle.qml"

fileInfo = QFileInfo(filePath)
baseName = fileInfo.baseName()
rlayer = QgsRasterLayer(filePath, baseName)
if not rlayer.isValid():
  print "Layer failed to load!"

crs = rlayer.crs()
crs.createFromId(4610,QgsCoordinateReferenceSystem.EpsgCrsId)
rlayer.setCrs(crs)

rlayer.loadNamedStyle(style_layer)
QgsMapLayerRegistry.instance().addMapLayer(rlayer)

I did add the raster layer into qgis, but the problem is that the layer
seems very dim... I also import the same raster image by just using the qgis
"Add Raster Layer" function which shows quite clear
Here is the comparison: 
<http://osgeo-org.1560.x6.nabble.com/file/n5303695/%E6%A8%A1%E7%B3%8A.png> 

<http://osgeo-org.1560.x6.nabble.com/file/n5303695/%E6%B8%85%E6%A5%9A.png> 


Does anyone met same issue before? Thank you very much!

Best, 
Nan



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