Hi Bill,
Sorry, but i can't do what i want today...
i follow your instructions, but i don`t know what happend.
The problem is that i need to show the gif in a display with maps
longitude and latitude like in the example that i send.
i need to paint the gif on a display with flatfield
(latitude,longitude)->(Realtype)
tanks again...
Olver.
On Wed, 31 Jan 2001, Bill Hibbard wrote:
> Hi Olver,
>
> > But, I really got a display with just 3 maps, longitude, latuitude and RGB
> > like this:
> >
> > visad.ScalarMap lonMap = new visad.ScalarMap(visad.RealType.Longitude,
> > visad.Display.XAxis );
> > visad.ScalarMap latMap = new visad.ScalarMap(visad.RealType.Latitude,
> > visad.Display.YAxis );
> > visad.ScalarMap varMap = new visad.ScalarMap(varRaster,visad.Display.RGB );
> >
> > where varRaster is a RealType.
> >
> > The GIFForm has as a range a tuple of 3 componets (R,G,B), and I need
> > to convert it to a RealType to put into a map Display.RGB.
> >
> > There's an example in the P5_09 from the visad's tutorial, but it use 5
> > maps.
>
> As described in tutorial section 5.9, a GIF image is read as
> a FlatField with MathType:
>
> ( (ImageElement, ImageLine) -> (Red, Green, Blue) )
>
> This means that it is a mapping from image line and element to
> true-color red, green and blue components. A ScalarMap to RGB
> uses psuedo-color when you want to adjust the color map for
> a single RealType. You could use a ScalarMap of Red, Green or
> Blue to RGB. Or could use ScalarMaps of all three to RGB, to
> adjust non-linear mappings for each of Red, Green and Blue.
>
> The domain of a GIF image is defined by simple line and element
> coordinates, since GIF images do not include navigation information
> for the mapping between (line, element) and (latitude, longitude).
> [Note that the McIDAS and HDF-EOS images that VisAD reads do include
> such navigation information, but they are much more complex file
> formats than GIF.]
>
> If you happen to know the mapping between (line, element) and
> (latitude, longitude) for your GIF image, you can extract the
> colors values from the FlatField by:
>
> float[][] colors = gif_field.getFloats();
> // now colors[0] is an array of red values, colors[1] is an
> // array of green values, and colors[2] is an array of blue
> // values
>
> and then build a new FlatField with MathType:
>
> ((Latitude, Longitude) -> (Red, Green, Blue))
>
> and use a Gridded2DSet for its domain Set, that defines the
> (lat, lon) locations of the pixels.
>
> Cheers,
> Bill
> ----------------------------------------------------------
> Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
> hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
> http://www.ssec.wisc.edu/~billh/vis.html
>
/*
VisAD Tutorial
Copyright (C) 2000 Ugo Taddei
*/
// Import needed classes
import visad.*;
import visad.util.*;
import visad.data.gif.*;
import visad.java2d.DisplayImplJ2D;
import visad.java3d.DisplayImplJ3D;
import java.rmi.RemoteException;
import java.awt.*;
import javax.swing.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
/**
VisAD Tutorial example 5_09
Analyse the MathType of a GIF/JPEG image
(( longitude, latitude ) -> ( redType, greenType, blueType ) )
Run program with java P5_09 image_name
*
*/
public class P5_09{
// Declare variables
// The RealTypes
private RealType time, longitude, latitude;
private RealType redType, greenType, blueType;
// The function
// ( time -> ( ( longitude, latitude ) -> ( redType, greenType,blueType ) ) )
private FunctionType func_t_latlon;
// Our Data values for longitude, latitude are represented by the set
private Set latlonSet;
// Time values are given by the set by the set
private Set timeSet;
// A FieldImpl
private FieldImpl timeField;
// The DataReference from the data to display
private DataReferenceImpl data_ref;
// The 2D display, and its the maps
private DisplayImpl display;
private ScalarMap timeAnimMap, timeZMap;
private ScalarMap lonXMap, latYMap, altiZMap;
private ScalarMap redMap, greenMap, blueMap;
// The VisADSlider
private VisADSlider vSlider;
//private AnimationWidget animWid;
public P5_09 (String[] args)
throws RemoteException, VisADException {
/*if(args.length != 1){
System.out.println("run with \"java P5_09 image_nam.gif\"");
return;
}*/
// Create GIFForm object
GIFForm image = new GIFForm();
// Get the image data
FlatField imageData = (FlatField)image.open("c:/windows/HLPBELL.gif");
// Print out the MathType
System.out.println(imageData.getType().prettyString());
// Get the image type. Oh, well, we know it's a FunctionType
FunctionType functionType = (FunctionType) imageData.getType();
//MathType imageType = imageData.getType();
// Get the domain...
RealTupleType domain = (RealTupleType) functionType.getDomain();
//campo= new
RealTupleType(visad.RealType.Longitude,visad.RealType.Latitude);
/*visad.Linear2DSet ValDom = (visad.Linear2DSet)imageData.getDomainSet();
int Columnas = ValDom.getX().getLength();
int Filas = ValDom.getY().getLength();
System.out.println("C "+Columnas+" F "+Filas);
visad.Linear2DSet Valdom = new visad.Linear2DSet(domain,-77,-76,Filas,
5,6,Columnas);
*/
// ...and the range
RealTupleType range = (RealTupleType)functionType.getRange();
//System.out.println("Dominio: \n"+imageData.getDomainSet());
// Create the quantities
longitude = (RealType) domain.getComponent(0);
latitude = (RealType) domain.getComponent(1);
redType = (RealType) range.getComponent(0);
greenType = (RealType) range.getComponent(1);
blueType = (RealType) range.getComponent(2);
// Create Display and its maps
// The display
//display = new DisplayImplJ3D("display1");
display = new DisplayImplJ2D("display1");
// Get display's graphics mode control draw scales
GraphicsModeControl dispGMC = (GraphicsModeControl)
display.getGraphicsModeControl();
dispGMC.setScaleEnable(true);
//HERE BEGINS THE PROBLEM!!!
// Create the ScalarMaps
lonXMap = new ScalarMap( RealType.Longitude, Display.XAxis );
latYMap = new ScalarMap( RealType.Latitude, Display.YAxis );
//NOW redMap WILL BE MY RGB MAP
redMap = new ScalarMap( new RealType("RGB"), Display.RGB );
// greenMap = new ScalarMap( greenType, Display.Green );
// blueMap = new ScalarMap( blueType, Display.Blue );
// Add maps to display
display.addMap( lonXMap );
display.addMap( latYMap );
display.addMap( redMap );
// display.addMap( greenMap );
// display.addMap( blueMap );
// Create a data reference and set the FieldImpl as our data
visad.RealTupleType campo=new
visad.RealTupleType(visad.RealType.Longitude,visad.RealType.Latitude);
visad.FunctionType functionType1 = new visad.FunctionType(campo,range);
visad.Linear2DSet ValDom = (visad.Linear2DSet)imageData.getDomainSet();
int Columnas = ValDom.getX().getLength();
int Filas = ValDom.getY().getLength();
visad.Linear2DSet Valdom = new visad.Linear2DSet(campo,0,40,Filas,
0,40,Columnas);
visad.FlatField FF = new visad.FlatField(functionType1,Valdom);
//System.out.println("dim: "+imageData.getRangeDimension());
for(int i=0;i<imageData.getRangeDimension();i++)
FF.setSample(i,imageData.getSample(i));
System.out.println("dom: "+imageData.getRangeSets());
//float[][] colors = imaget1.getFloats();
// now colors[0] is an array of red values, colors[1] is an
// array of green values, and colors[2] is an array of blue
// values
visad.DataReferenceImpl ref_imaget1 = new
visad.DataReferenceImpl("ref_imaget1");
ref_imaget1.setData(FF);
display.addReference( ref_imaget1);
/*
data_ref = new DataReferenceImpl("image_ref");
data_ref.setData( imageData );
// Add reference to display
display.addReference( data_ref );
*/
// Get AnimationControl from the Animation ScalarMap
//AnimationControl ac = (AnimationControl) timeAnimMap.getControl();
// and start animation
//ac.setOn( true );
// Create the AnimationWidget
//animWid = new AnimationWidget( timeAnimMap );
// Create application window, put display into it
JFrame jframe = new JFrame("VisAD Tutorial example 5_09");
jframe.getContentPane().setLayout( new BorderLayout());
jframe.getContentPane().add(display.getComponent(), BorderLayout.CENTER);
// Set window size and make it visible
jframe.setSize(300, 300);
jframe.setVisible(true);
}
public static void main(String[] args)
throws RemoteException, VisADException
{
new P5_09(args);
}
} //end of Visad Tutorial Program 5_09
