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 >>>>> Try the new software tools for yourself. Speed compiling, find bugs >>>>> proactively, and fine-tune applications for parallel performance. >>>>> See why Intel Parallel Studio got high marks during beta. >>>>> http://p.sf.net/sfu/intel-sw-dev >>>>> _______________________________________________ >>>>> Geotools-gt2-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >>>>> >>>>> >>>>> >>>> >>>> . >>>> >>>> >>>> >>> >>> >>> >> >> . >> >> > > > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
