Estimation of landcover proportion in an IFOV of a mixel using a precise edge locator

Assuming that IFOVs of most mixels in a remote sensing image lie on landcover boundaries, in order to estimate landcover proportion high contrasted edges in a mixel IFOV can be approximately considered to locate an edge in a mixel very precisely. A precise edge locator which is based on the moment preserving principle is tested in computer experiments in order to estimate landcover proportion in a mixel in this research. The experiments show that: 1) the estimated landcover proportions were affected by the length of the edges, the noise, the window sizes of the locator and the PSF, 2) the magnitude of errors on long and high contrasted straight edges is almost smaller than 20%, 3) some improvements of the algorithm to estimate landcover proportion in mixels are necessary