I will play with the interpolation, but the images look good at a
glance; certainly not the pixelation I had originally imagined.
fwiw, i just did :
GridCoverage2D scaled = (GridCoverage2D) Operations.DEFAULT.scale(
(GridCoverage) originalCoverage, 0.5, 0.5, 0, 0, null);
Coverage resampled= Operations.DEFAULT.resample(scaled, crs);
scaled = (GridCoverage2D) Operations.DEFAULT.scale(
(GridCoverage) resampled, 2, 2, 0, 0, null);
On 3/16/2010 12:54 PM, Simone Giannecchini wrote:
> Beware of the fact that if you are working with pure RGB images you
> may want to use at least bilinear interpolation to get better results
> (but less speed).
>
> 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://www.linkedin.com/in/simonegiannecchini
> http://twitter.com/simogeo
>
> -------------------------------------------------------
>
>
>
> On Tue, Mar 16, 2010 at 7:48 PM, john poole<[email protected]> wrote:
>
>> Simone
>>
>> The scaling up was the part I wasn't sure of. It sounds perfect, I'll give
>> it a try.
>>
>> Thanks,
>> John
>> On 3/16/2010 12:39 PM, Simone Giannecchini wrote:
>>
>>> Ciao John,
>>> the scale operation can be used to answer questions like "I want to
>>> scale my image down/up by xxxx on each direction"
>>>
>>> Quoting JAI Scale javadoc:
>>>
>>> "Specifying a scale factor of greater than 1 increases the size of the
>>> image, specifying a scale factor between 0 and 1 (non-inclusive)
>>> decreases the size of an image. An IllegalArgumentException will be
>>> thrown if the specified scale factors are negative or equal to zero."
>>>
>>> About the warp in geotools, you cannot control it, at least not as it is.
>>>
>>> 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://www.linkedin.com/in/simonegiannecchini
>>> http://twitter.com/simogeo
>>>
>>> -------------------------------------------------------
>>>
>>>
>>>
>>> On Tue, Mar 16, 2010 at 7:31 PM, john poole<[email protected]> wrote:
>>>
>>>
>>>> I might not understand what the scale operation does, but wouldn't that
>>>> mean
>>>> less resolution in both the image and the operation?
>>>>
>>>> I'm trying to find something that essentially uses fewer points to
>>>> execute a
>>>> warp.
>>>>
>>>>
>>>> On 3/16/2010 11:54 AM, Simone Giannecchini wrote:
>>>>
>>>>
>>>>> Ciao John,
>>>>> if you want to get more speed vs more accuracy you can use one of the
>>>>> scale operations.
>>>>>
>>>>> Check this test to get a feeling about what you can do:
>>>>>
>>>>>
>>>>>
>>>>> http://svn.osgeo.org/geotools/trunk/modules/library/coverage/src/test/java/org/geotools/coverage/processing/ScaleTest.java
>>>>>
>>>>>
>>>>> 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://www.linkedin.com/in/simonegiannecchini
>>>>> http://twitter.com/simogeo
>>>>>
>>>>> -------------------------------------------------------
>>>>>
>>>>>
>>>>>
>>>>> On Mon, Mar 15, 2010 at 6:29 PM, john poole<[email protected]>
>>>>> wrote:
>>>>>
>>>>>
>>>>>
>>>>>> Is there a way to call Coverage.resample so that accuracy is
>>>>>> sacrificed for speed?
>>>>>> i.e. can we change the block size from whatever the default is, (9?) to
>>>>>> be something larger?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Download Intel® Parallel Studio Eval
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>>>>>> Geotools-gt2-users mailing list
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> .
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>> .
>>>
>>>
>>>
>>
>>
>>
> .
>
>
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