Raster image I/O - Revision history

Nick: /* Converting RSF 2-D data to raster images */

2011-08-13T01:16:34Z

Converting RSF 2-D data to raster images

← Older revision		Revision as of 01:16, 13 August 2011
Line 42:		Line 42:
	transp \| # Make data in row-major order		transp \| # Make data in row-major order
	byte gainpanell=all allpos=y \| # Convert data to byte representation		byte gainpanell=all allpos=y \| # Convert data to byte representation
	disfil col=1 format="%02X" \| # Dump data in one column in ASCII-hex		disfil col=1 number=n format="%02X" \| # Dump data in one column in ASCII-hex
	~~sed -e "s/\s[0-9]\:\s*//g" \| # Strip column numbers~~
	xxd -r -p # Read ASCII output and convert it to binary form		xxd -r -p # Read ASCII output and convert it to binary form
	''')		''')

Sfomel: /* Converting RSF 2-D data to raster images */

2009-06-24T21:02:05Z

Converting RSF 2-D data to raster images

← Older revision		Revision as of 21:02, 24 June 2009
Line 27:		Line 27:

	==Converting RSF 2-D data to raster images==		==Converting RSF 2-D data to raster images==
			If Madagascar has been compiled with TIFF support, <tt>sfbyte2tif</tt> can be used:
			<bash>
			< model.rsf sfbyte \| sfbyte2tif > model.tif
			</bash>
	If Madagascar has been compiled with JPEG support, <tt>sfbyte2jpg</tt> can be used:		If Madagascar has been compiled with JPEG support, <tt>sfbyte2jpg</tt> can be used:
	<bash>		<bash>

Sfomel: /* Converting raster images to RSF files */

2009-06-24T21:00:12Z

Converting raster images to RSF files

← Older revision		Revision as of 21:00, 24 June 2009
Line 1:		Line 1:
	==Converting raster images to RSF files==		==Converting raster images to RSF files==
	One option is sfjpg2byte. It requires the JPEG library to be present at the compilation time.		One option is <tt>sftif2byte</tt> or <tt>sfjpg2byte</tt>. It requires the TIFF or JPEG library, respectively, to be present at the compilation time.
			<bash>
			< lena.tif sftif2byte \| sfdd type=float > lena.rsf
			</bash>
	<bash>		<bash>
	< lena.jpg sfjpg2byte \| sfdd type=float > lena.rsf		< lena.jpg sfjpg2byte \| sfdd type=float > lena.rsf
	</bash>		</bash>
	Another option is to use the convert utility from [http://www.imagemagick.org ImageMagick]. For a ~~greyscale~~ image:		Another option is to use the <tt>convert</tt> utility from [http://www.imagemagick.org ImageMagick]. For a grayscale image:
	<bash>		<bash>
	< lena.jpg convert - lena.gray		< lena.jpg convert - lena.gray

Nick: /* Converting raster images to RSF files */

2009-06-23T22:22:54Z

Converting raster images to RSF files

← Older revision		Revision as of 22:22, 23 June 2009
Line 12:		Line 12:
	<bash>		<bash>
	< lena.jpg convert - lena.rgb		< lena.jpg convert - lena.rgb

	echo in=lena.rgb data_format=native_uchar n1=3 n2=512 n3=512 \| sfdd type=float > lena.rsf		echo in=lena.rgb data_format=native_uchar n1=3 n2=512 n3=512 \| sfdd type=float > lena.rsf

			# Red component:
			< lena_rgb.rsf sfwindow n1=1 f1=0 > lena_red.rsf
			# Green:
			< lena_rgb.rsf sfwindow n1=1 f1=1 > lena_green.rsf
			# Blue:
			< lena_rgb.rsf sfwindow n1=1 f1=2 > lena_blue.rsf
	</bash>		</bash>

	==Converting RSF 2-D data to raster images==		==Converting RSF 2-D data to raster images==
	If Madagascar has been compiled with JPEG support, <tt>sfbyte2jpg</tt> can be used:		If Madagascar has been compiled with JPEG support, <tt>sfbyte2jpg</tt> can be used:

Nick: New page: ==Converting raster images to RSF files== One option is sfjpg2byte. It requires the JPEG library to be present at the compilation time. < lena.jpg sfjpg2byte | sfdd type=float > len...

2009-06-23T21:48:51Z

New page: ==Converting raster images to RSF files== One option is sfjpg2byte. It requires the JPEG library to be present at the compilation time. <bash> < lena.jpg sfjpg2byte | sfdd type=float > len...

New page

==Converting raster images to RSF files==
One option is sfjpg2byte. It requires the JPEG library to be present at the compilation time.
<bash>
< lena.jpg sfjpg2byte | sfdd type=float > lena.rsf
</bash>
Another option is to use the convert utility from [http://www.imagemagick.org ImageMagick]. For a greyscale image:
<bash>
< lena.jpg convert - lena.gray
echo in=lena.gray data_format=native_uchar n1=512 n2=512 | sfdd type=float > lena.rsf
</bash>
or, for a color image:
<bash>
< lena.jpg convert - lena.rgb
echo in=lena.rgb data_format=native_uchar n1=3 n2=512 n3=512 | sfdd type=float > lena.rsf
</bash>
==Converting RSF 2-D data to raster images==
If Madagascar has been compiled with JPEG support, <tt>sfbyte2jpg</tt> can be used:
<bash>
< model.rsf sfbyte | sfbyte2jpg > model.jpg
</bash>
Then, another program can be used to convert the JPEG file to another format.
If [http://www.imagemagick.org ImageMagick] is present, it can be used to convert a RSF binary to almost any image format. In a SConstruct, the workflow would look like:
<python>
Flow('data.gray','data',
'''
transp | # Make data in row-major order
byte gainpanell=all allpos=y | # Convert data to byte representation
disfil col=1 format="%02X" | # Dump data in one column in ASCII-hex
sed -e "s/\s*[0-9]*\:\s*//g" | # Strip column numbers
xxd -r -p # Read ASCII output and convert it to binary form
''')

Flow('data.png','data.gray',
'''
convert -size %dx%d -depth 8 ${SOURCES[0]} ${TARGETS[0]} # Run ImageMagick
''' % (n2, n1), stdin=0, stdout=0)
</python>

To output to another format, just change the extension in the last <tt>Flow()</tt> from .png to .gif or .jpg, for example. Create the output simply by running: <tt>scons data.png</tt>