Re: [JPP-Devel] Raster Image in OJ2

2021-12-02 Thread Giuseppe Aruta 
Hey Ede, thanks for the explanation. Temp files sounds a way to explore
the raster management. I also wonder if we explore the way to reduce using
so many
2D arrays and use DataBufferDouble as single array which uses less memory

I did some test on my Raster tools. I also explore a bit into
RasterImageIO, RasterImage , AddRasterImageLayerWizard and TiffUtilsV2 (OJ
1.16) classes to understand how the framework does the job. I realized that
methods in RasterImageIO can be simplified, at least for JPG, JPG 2000,
GIF, BMP and PNG, for instance
reusing com.vividsolutions.jump.workbench.imagery.geoimg.GeoRaster which
works far better and possibly saves some memory. It requires of course some
implementation
as parameter JAI.create("ImageRead"...) seems to me not working with
JPG2000 while JAI.create("fileload"...) does.
I  added a class on package org.openjump.core.rasterimage.GeoRasterUtils
(OJ 1.16) that explains what I mean. It uses JAI/ImageIO
BTW. A method in class RasterImageIO, lreadCellValue(String filenameOrURL,
int col, int row,int band), reads the file instead of the build data[]
array and seems quite fast.

Peppe






Il giorno gio 2 dic 2021 alle ore 14:31  ha scritto:

> well Peppe,
>
> again. as far as i understand, we are loading the Raster Data and Image to
> memory completely! with _our_ Raster-Image framework ;). so however good a
> image readers memory management is, the bottleneck is our implementation.
> what we do is
> - read the image data via driver
> - create a 2D data array (rasterdata) _and_ an image representation for
> display purposes
> both are held in memory in full, so the bigger the raster data ...
>
> as a first step i could imagine to write the image to a temp file and use
> JAI driver to access it in turn. that way we would free some memory. ..ede
>
> On 02.12.2021 13:53, Giuseppe Aruta wrote:
> > Hi Ede,
> > Does Apache commons manage the memory in a better way than JAI/ImageIO?
> > I really don't disagree with switching to Apache Commons and, thus,
> simplifying the code.
> > RasterImageIO support also reading (some) JPG 2000 (via JAI) which is
> not supported by Apache Commons.
> > Peppe
> >
> > Il giorno gio 2 dic 2021 alle ore 12:04  edgar.sol...@web.de>> ha scritto:
> >
> > On 02.12.2021 06:52, jump-pilot-svn--- via Jump-pilot-devel wrote:
> > > Revision: 6677
> > >   http://sourceforge.net/p/jump-pilot/code/6677
> > > Author:   ma15569
> > > Date: 2021-12-02 05:52:46 + (Thu, 02 Dec 2021)
> > > Log Message:
> > > ---
> > > Inverted B/W color display for raster. TODO: to adopt to OpenJUMP
> 2.0
> > >
> >
> > as Raster is completely held in memory anyway what about switching
> over to Apache Commons Imaging in OJ2 completely? i added a plain display
> test implementation to the Commons Imaging Reader w while ago.
> >
> > ..ede
> >
> >
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> >
> >
> >
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> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
> >
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>
>
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Re: [JPP-Devel] Raster Image in OJ2

2021-12-02 Thread edgar . soldin 
well Peppe,

again. as far as i understand, we are loading the Raster Data and Image to 
memory completely! with _our_ Raster-Image framework ;). so however good a 
image readers memory management is, the bottleneck is our implementation. what 
we do is
- read the image data via driver
- create a 2D data array (rasterdata) _and_ an image representation for display 
purposes
both are held in memory in full, so the bigger the raster data ...

as a first step i could imagine to write the image to a temp file and use JAI 
driver to access it in turn. that way we would free some memory. ..ede

On 02.12.2021 13:53, Giuseppe Aruta wrote:
> Hi Ede,
> Does Apache commons manage the memory in a better way than JAI/ImageIO?
> I really don't disagree with switching to Apache Commons and, thus,  
> simplifying the code.
> RasterImageIO support also reading (some) JPG 2000 (via JAI) which is not 
> supported by Apache Commons.
> Peppe
>
> Il giorno gio 2 dic 2021 alle ore 12:04  > ha scritto:
>
> On 02.12.2021 06:52, jump-pilot-svn--- via Jump-pilot-devel wrote:
> > Revision: 6677
> >           http://sourceforge.net/p/jump-pilot/code/6677
> > Author:   ma15569
> > Date:     2021-12-02 05:52:46 + (Thu, 02 Dec 2021)
> > Log Message:
> > ---
> > Inverted B/W color display for raster. TODO: to adopt to OpenJUMP 2.0
> >
>
> as Raster is completely held in memory anyway what about switching over 
> to Apache Commons Imaging in OJ2 completely? i added a plain display test 
> implementation to the Commons Imaging Reader w while ago.
>
> ..ede
>
>
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> Jump-pilot-devel@lists.sourceforge.net 
> 
> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>
>
>
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>



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Re: [JPP-Devel] Raster Image in OJ2

2021-12-02 Thread Giuseppe Aruta 
Hi Ede,
Does Apache commons manage the memory in a better way than JAI/ImageIO?
I really don't disagree with switching to Apache Commons and, thus,
simplifying the code.
RasterImageIO support also reading (some) JPG 2000 (via JAI) which is not
supported by Apache Commons.
Peppe

Il giorno gio 2 dic 2021 alle ore 12:04  ha scritto:

> On 02.12.2021 06:52, jump-pilot-svn--- via Jump-pilot-devel wrote:
> > Revision: 6677
> >   http://sourceforge.net/p/jump-pilot/code/6677
> > Author:   ma15569
> > Date: 2021-12-02 05:52:46 + (Thu, 02 Dec 2021)
> > Log Message:
> > ---
> > Inverted B/W color display for raster. TODO: to adopt to OpenJUMP 2.0
> >
>
> as Raster is completely held in memory anyway what about switching over to
> Apache Commons Imaging in OJ2 completely? i added a plain display test
> implementation to the Commons Imaging Reader w while ago.
>
> ..ede
>
>
> ___
> Jump-pilot-devel mailing list
> Jump-pilot-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
>
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[JPP-Devel] Raster Image in OJ2

2021-12-02 Thread edgar . soldin 
On 02.12.2021 06:52, jump-pilot-svn--- via Jump-pilot-devel wrote:
> Revision: 6677
>   http://sourceforge.net/p/jump-pilot/code/6677
> Author:   ma15569
> Date: 2021-12-02 05:52:46 + (Thu, 02 Dec 2021)
> Log Message:
> ---
> Inverted B/W color display for raster. TODO: to adopt to OpenJUMP 2.0
>

as Raster is completely held in memory anyway what about switching over to 
Apache Commons Imaging in OJ2 completely? i added a plain display test 
implementation to the Commons Imaging Reader w while ago.

..ede


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