Here is an example of usage.
// Get the resources as needed.
final AbstractGridFormat format = getFormat(testURL);
final ImageMosaicReader reader = getReader(testURL, format);
// limit yourself to reading just a bit of it
final ParameterValue<Color> inTransp =
ImageMosaicFormat.INPUT_TRANSPARENT_COLOR.createValue();
inTransp.setValue(inputTransparent);
final ParameterValue<Color> outTransp =
ImageMosaicFormat.OUTPUT_TRANSPARENT_COLOR.createValue();
outTransp.setValue(outputTransparent);
// Test the output coverage
final GridCoverage2D coverage = (GridCoverage2D) reader.read(new
GeneralParameterValue[] { inTransp, outTransp })
Ciao,
Simone.
-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Founder - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy
phone: +39 0584983027
fax: +39 0584983027
mob: +39 333 8128928
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://simboss.blogspot.com/
http://www.linkedin.com/in/simonegiannecchini
-------------------------------------------------------
2009/9/18 Stefan Krüger <[email protected]>:
> Am Donnerstag 10 September 2009 13:34:07 schrieb Stefan Krüger:
>> Hi
>>
>> When i create an ImagePyramidReader or am ImageMosaicReader with parameters
>> sourceURL and Hints, how to i set/change the transparent input color
>> programatically? Before or after the constuction.. i just can't find a way.
>>
>> > Hints hints = new Hints();
>> > reader = new ImagePyramidReader(theURL, hints);
>>
>> I have tried to follow the hints through the process, but i don't get it
>> how a Hint given to the ImagePyramidReader can end up as a
>> GeneralParameterValue in calls to
>>
>> > public GridCoverage read(GeneralParameterValue[] params) throws
>> > IOException {
>>
>> because it looks like the readParams are just set once in the setInfo()
>> method
>>
>> of the *Format:
>> > // reading parameters
>> > readParameters = new ParameterGroup(new
>> > DefaultParameterDescriptorGroup(mInfo, new GeneralParameterDescriptor[]{
>> > READ_GRIDGEOMETRY2D,
>> > INPUT_TRANSPARENT_COLOR,
>> > INPUT_IMAGE_THRESHOLD_VALUE,
>> > OUTPUT_TRANSPARENT_COLOR,
>> > USE_JAI_IMAGEREAD,
>> > BACKGROUND_VALUES,
>> > SUGGESTED_TILE_SIZE,
>> > ALLOW_MULTITHREADING,
>> > MAX_ALLOWED_TILES}));
>>
>> I thought about overwriting the setInfo() method in ImageMosaicFormat, but
>> it is a final class.
>>
>> Personally i have just added a setInputTransparentColor(Color c) method to
>> the ImageMosaicReader and ImagePyramidReader classes, but as i am preparing
>> a patch for better URL handling
>> ( http://jira.codehaus.org/browse/GEOT-2695 ) i want to do it the GT way as
>> much as possible.
>>
>> Greetings,
>> Steve
>
>
> Hi. I looked at it more and i think it is not possible. If nobody rejects i
> will open a JIRA and add a patch to add simple setInputTransparentColor and
> setOutputTransparentColor to ImagePyramidReader and ImageMosaicReader. If the
> color is set on the PyramidReader, it will propagate it to all MosaicReaders
> used.
>
>
> Greetz
> Steve
>
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