%0 Journal Article
%T The Theory to Evaluate the Image Spatial Resolution Quantitatively<br>海啸地区遥感图像空间分辨率定量评价研究
%A JI Tong-kai
%A ZHAO Zhong-ming
%A <br>季统凯
%A 赵忠明
%J 遥感学报
%D 2005
%I 
%X The spatial resolution is a measurement of the image details, and is also an indictor for the objects details, it appears the degree of the scene details. But up to now, there are no effective approaches to be quantifiable evaluating the image resolution. The manner of forming an image can be in two ways: scanning manner and non-scanning manner (for example: framing). In normal, forming an image by non-scanning manner has the same spatial resolution in the vertical and horizontal directions. But an image by scanning manner has the different spatial resolution in the two directions. The factors that influence the image spatial resolution exist: the contrast, shape, number of the scene which was observed and the lens, focus and instantaneous field of view(IFOV) of imaging system, the wavelength of radiation, aperture of imaging, model of image and the design of the imaging system, and so on. The main effective factors are distinguishing limit decided by the diffraction of the light,MTF(Modulate Transfer Function) of the imaging system,NSR(Noise Signal Ratio) and the design of imaging system. This paper is based on the entropy theory and the property of image information,bring forward the principle theory of varied information entropy, provided the conception, definition,method and character analysis. The experiment for bar images and remote sensing images of tsunami area approved that the method can be qualified to measure the spatial resolution in horizontal and vertical directions for the varied information equably, and provide a new method for the qualified measuring the image spatial resolution.
%K varied information entropy
%K images
%K spatial resolution
%K quality evaluation<br>海啸
%K 变率信息熵
%K 图像
%K 空间分辨率
%K 质量评价
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=A3F06CCC3A256F30&yid=2DD7160C83D0ACED&vid=9CF7A0430CBB2DFD&iid=E158A972A605785F&sid=8C8D895E58E44DBB&eid=8C267C8DC97FEEEF&journal_id=1007-4619&journal_name=遥感学报&referenced_num=3&reference_num=9