Original 2.4 m and pansharpened 0.6 m RGB images. Cut outs from larger images. The pansharpened image is 7.5 Gb and was stored in the BigTIFF format.
Many very high resolution (VHR) remote sensing satellites and digital aerial cameras record one high resolution panchromatic image and multiple low resolution spectral bands, such as red, gree, blue, and near infrared (NIR). The panchromatic image is recorded in the visible spectrum and often extends into the NIR wavelengths. The resolution of the multispectral bands is typically one fourth of the panchromatic images. By using the information from both the multi spectral bands and the panchromatic image, a new image with all the multispectral bands and with the pixel size of the panchromatic image can be calculated. This is known as panchromatic sharpening or pansharpening and is a kind of image fusion. The new image can be displayed as e.g. a color RGB image and will have the detail of the panchromatic image. Different algorithms can be used for pansharpening. The Brovey method is a widely spread and well established method and was implemented in WiMap PanSharp. Images larger than 4 Gb are stored in the
BigTIFF format. Online documentation is available
here.
A demo version is available
here.The demo version has the same features as the full version, but adds a diagonal line pattern to the pansharpened image.
