How to handle Image Fusion

This page presents the procedures to operate "Image Fusion..." window.

Performing an Image Fusion:

  • select an image model IL at the "Control Panel" ( );
  • click on Image - Image Fusion... at the main menu;
  • choose the type of Fusion... the desired option (IHS, PCA or Wisper);
  • Depending on the choice, other windows will open to be completed with some options, as follows:

    If the method chosen is IHS:
  • A new window will be enabled for the choice of IHS parameters;
  • Choose a high resolution image;
  • Choose low resolution images in Input Images inform which bands will take part in the transformation (R, G, and B). Use the window "Categories and ILs" to insert the input ILs you will use ( learn more about this window ); click on the list of categories and choose an IL; click again in Apply. Observe that the selected IL and the resolution are presented;

    If the method chosen is PCA:
  • A new window will be enabled for the choice of PCA parameters;
  • Choose a high resolution image;
  • Choose low resolution images, a list of bands will be displayed. Choose the images;

    If the method chosen is Wisper:
  • A new window will be enabled for the choice of Wisper parameters. Note that this window is slightly different from the others. The window has tabs for choosing high resolution, low resolution images and Wavelet options;
  • On the High Resolution tab choose a high resolution image. It should be noted that the satellite sensor type should be chosen;
  • On the Low Resolution tab, choose the bands in a list. The chosen bands should have their sensor type chosen for each one;
  • In the Wavelet tab, one must choose the type of filter that will be used (Spline, Triangle or Invalid) and also the level of decomposition that the high resolution and low resolution image will have;

  • In Common Parameters choose an interpolator, in the next closest neighbor, bilinear or bicubic;
  • in Output Layer: type the name of the output image and choose an Output category. This name will be used as a prefix to generate the output images;
  • You must also be informed of the value for the output pixel size. The resolution value can only be the same as one of the images used as input;
  • click on Apply to perform the fusion.

NOTE: Notice on the "Control Panel" that the outcome images will always be associated to the same category as the input images.



See also:
Learn more about IHS transformation in SPRING
About other techniques of Image PRocessing.
Image Processing Options Menu.