This article summarizes the technologies of image mergence, including the basic theory, common algorithm and basic flow of mergence, then uses HIS, PCA to merge whole wave band and multi-spectrum bands of Quick Bird images.

In order to remove the false topographic phenomenon of the remote-sensing images,this paper put forward a method based on DEM data and IHS transformation and made a case study of the image of Guanyuan City in Sichuan Province.

In order to remove the false topographic perception phenomenon existing in the remote sensing images obtained by sun-synchronous satellites of mountainous area,this paper brought up a method based on DEM data and IHS transformation and took a case study on an image of Guangyuan city in Sichuan Province.

A method, which is the combination of wavelet transformation and IHS transformation, is described in this paper.

The fusion of multi-original remote sense images by IHS transform and multi-band wavelet transform;

Comparative study on different IHS transform formulas for extraction of vegetation information.;

Algorithm combined of IHS transform and wavelet transform based on gradient weight rule;

An improved fusion algorithm for multi-source remote sensing images with high spatial resolution and multi-spectral capacity is proposed based on traditional IHS fusion and grey correlation analysis.

Dynamic monitoring of Nanjing city extension was conducted by using the technology of remote sensing and GIS which include pseudo color composite based on principal components analysis,integrated processing of subtraction and quotient,IHS fusion and the analysis of buffer.

Based on the analysis of image fusion algorithm of Intensity-Hue-Saturation(IHS) and aiming at the limitations of spectrum distortion to IHS fusion algorithm,an improved IHS fusion algorithm was proposed,which adopted the advantage of Principal Component Analysis(PCA).

So a pixel-level image fusion algorithm for infrared and visible light image based on IHS space is proposed.