How to pansharpen imagery in Geomatica PCI

PANSHARP applies the automatic image fusion algorithm to fuse a high-resolution
panchromatic image with a multispectral image, creating a high-resolution color
image. This technique is often referred to as pan-sharpening. It is an approach
based on least squares developed to best approximate the gray value relationship
between the original multispectral, panchromatic and the fused images to achieve
a best color representation.
The power of PANSHARP lies in the simplicity of its algorithm and its versatility. It
works with any image data type - 8-bit unsigned, 16-bit signed/unsigned, 32-bit
floating point and is computationally efficient. It can also fuse images acquired
simultaneously by the same sensor or use images from different sensors.
A very important aspect of image fusion algorithms is ensuring good co-registration
of the input panchromatic and multispectral image data. This problem becomes
more pronounced with high resolution sensors as IKONOS or QuickBird. A single
pixel offset between the high resolution panchromatic image data and the low
resolution multispectral image data results in color shifts clearly visible in the pan-
sharpened imagery. Thus, a preprocessing step such as geometric correction or
orthorectification, may be required before pan-sharpening the multispectral image
data.
For best results, the input reference image channels have to be selected in such a
way that the multispectral bands cover as close as possible the frequency range of
the high resolution panchromatic image.

[@mohammednasmi4397]

تحياتي للأستاذ المبدع سي مصطفى

[@resshaichigo1329]

Can I have a satellite image for me to learn how to use PCI Geomatica?

[@jilitelmostafa]

@@resshaichigo1329 you can download imagery from website glovis USGS or earthexplorer.