A fractal feature may be analyzed spectrally and spatially due to the"combination of spectrum and image"character inhered in hyperspectral images.The blanket method used for computing fractal dimension of surface is transferred to calculating fractal dimension of curves of Hyperion image.Up and down fractal signature for each scale is calculated based on the hyperspectral curve of each pixel.The fractal signature and their corresponding scale are analyzed.The result shows that fractal signature changes obviously at some special scales for different targets.As for the Hyperion data

the down fractal signature is more salient for effectively discriminating targets.A brief discussion about the relation of fractal feature scale with up and down fractal signature

initial calculating scale and number of samples is presented at the end of this paper.