MagickImage.Write from geoTiff to output stream with jp2 format
Posted: 2016-06-01T08:59:19-07:00
Hello,
For a geoTransform .NET project i want to generate an output stream in jp1 format from a geoTiff file.
I use ImageMagik to manage jp2.
My problem occurs in the final part of the process.
I load my geoTiff file in an instance of ImageMagick
then further on process i set the response of my webservice
All is good with jpeg format.
All is jpg2 format if it has not been processed with GDAL utility
The problem occurs with jp2 format when my geoTiff file has been cropped by GDAL utility "gdal_translate" or "gdalwarp".
I can display the geoTiff with a viewer such as IrfanViewer or Windows Viewer. But when it's loaded on the browser the image i get is white.
Please find result from command line tiffInfo:
for ImageBase (ok):
for ImageCrop (error):
the original geoTiff is created programatically from a stream and geotransform information calculate with metadata:
This is how i set basic tifftag (i could give more details about this process)
is someone already use image magik is those kind of process?
Best regards,
Christophe.
For a geoTransform .NET project i want to generate an output stream in jp1 format from a geoTiff file.
I use ImageMagik to manage jp2.
My problem occurs in the final part of the process.
I load my geoTiff file in an instance of ImageMagick
Code: Select all
imgResult = new MagickImage(imageIdentifier + "_crop.tiff");
Code: Select all
// Context for response
WebOperationContext context = WebOperationContext.Current;
context.OutgoingResponse.ContentType = streamFormat;
context.OutgoingResponse.Headers.Add("Content-Disposition", string.Format("inline;filename={0}.{1}", featureid, context.OutgoingResponse.ContentType.Substring(context.OutgoingResponse.ContentType.LastIndexOf('/') + 1)));
// Create outPut stream with jpeg or jp2 format based on initial request
if (streamFormat == "image/jp2")
{
magick.Write(responseStream, MagickFormat.Jp2);
}
else
{
magick.Write(responseStream, MagickFormat.Jpeg);
}
All is jpg2 format if it has not been processed with GDAL utility
The problem occurs with jp2 format when my geoTiff file has been cropped by GDAL utility "gdal_translate" or "gdalwarp".
I can display the geoTiff with a viewer such as IrfanViewer or Windows Viewer. But when it's loaded on the browser the image i get is white.
Please find result from command line tiffInfo:
for ImageBase (ok):
Code: Select all
TIFFReadDirectory: Warning, Unknown field with tag 34264 (0x85d8) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34735 (0x87af) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34736 (0x87b0) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34737 (0x87b1) encountered.
TIFF Directory at offset 0x1ca09a (1876122)
Image Width: 900 Image Length: 811
Resolution: 96, 96
Bits/Sample: 8
Sample Format: unsigned integer
Compression Scheme: JPEG
Photometric Interpretation: RGB color
YCbCr Subsampling: 2, 2
Samples/Pixel: 4
Rows/Strip: 811
Planar Configuration: single image plane
Tag 34264: 0.000970,-0.000006,0.000000,-73.722622,0.000005,-0.000666,0.000000,
-50.173928,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.0000
00
Tag 34735: 1,1,0,7,1024,0,1,2,1025,0,1,1,2048,0,1,4326,2049,34737,7,0,2054,0,1
,9102,2057,34736,1,1,2059,34736,1,0
Tag 34736: 298.257224,6378137.000000
Tag 34737: WGS 84|
JPEG Tables: (289 bytes)
Code: Select all
TIFFReadDirectory: Warning, Unknown field with tag 34264 (0x85d8) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34735 (0x87af) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34736 (0x87b0) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 34737 (0x87b1) encountered.
TIFF Directory at offset 0x8 (8)
Image Width: 200 Image Length: 200
Resolution: 96, 96
Bits/Sample: 8
Sample Format: unsigned integer
Compression Scheme: None
Photometric Interpretation: RGB color
Extra Samples: 1<assoc-alpha>
Samples/Pixel: 4
Rows/Strip: 10
Planar Configuration: single image plane
Tag 34264: 0.000970,-0.000006,0.000000,-73.722622,0.000005,-0.000666,0.000000,
-50.173928,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.0000
00
Tag 34735: 1,1,0,7,1024,0,1,2,1025,0,1,1,2048,0,1,4326,2049,34737,7,0,2054,0,1
,9102,2057,34736,1,1,2059,34736,1,0
Tag 34736: 298.257224,6378137.000000
Tag 34737: WGS 84|
the original geoTiff is created programatically from a stream and geotransform information calculate with metadata:
This is how i set basic tifftag (i could give more details about this process)
Code: Select all
// Use ImageMagick to load stream and save as temp bmp file.
// This API enable to manage jp2 formatted stream
MagickImage img = new MagickImage(sourceStream);
string tempFile = Path.GetDirectoryName(destinationPath) + "\\" + Path.GetFileNameWithoutExtension(destinationPath) + ".bmp";
img.Write(tempFile);
using (Bitmap bmp = new Bitmap(tempFile))
{
...
...
else if (pixFormat == PixelFormat.Format32bppArgb)
{
tif.SetField(TiffTag.IMAGEWIDTH, bmp.Width);
tif.SetField(TiffTag.IMAGELENGTH, bmp.Height);
tif.SetField(TiffTag.BITSPERSAMPLE, 8);
tif.SetField(TiffTag.COMPRESSION, Compression.JPEG);
tif.SetField(TiffTag.JPEGQUALITY, 100);
tif.SetField(TiffTag.PHOTOMETRIC, Photometric.RGB);
tif.SetField(TiffTag.ROWSPERSTRIP, bmp.Height);
tif.SetField(TiffTag.XRESOLUTION, bmp.HorizontalResolution);
tif.SetField(TiffTag.YRESOLUTION, bmp.VerticalResolution);
tif.SetField(TiffTag.SAMPLESPERPIXEL, 4);
tif.SetField(TiffTag.PLANARCONFIG, PlanarConfig.CONTIG);
tif.SetField(TiffTag.SAMPLEFORMAT, 1);
tif.SetField(TiffTag.DATATYPE, 2);
}
...
...
Best regards,
Christophe.
