CAJ | 학술논문

针对遥感数字图像对比度较低的特点,本文提出了一种无损的平移双向拉伸图像增强方法。首先根据亮度的均值将图像中的有效像素平移至128,再对遥感数字图像进行无损的双向对比度拉伸,保持了图像的完整性,为遥感图像合成、融合、信息提取及分类奠定了基础。实验表明该方法达到了较好的目视判读的效果,并且适用于多种卫星遥感数字图像的预处理。
침대요감수자도상대비도교저적특점,본문제출료일충무손적평이쌍향랍신도상증강방법。수선근거량도적균치장도상중적유효상소평이지128,재대요감수자도상진행무손적쌍향대비도랍신,보지료도상적완정성,위요감도상합성、융합、신식제취급분류전정료기출。실험표명해방법체도료교호적목시판독적효과,병차괄용우다충위성요감수자도상적예처리。
A method of lossless enhancement for two-way image stretch translation is proposed while taking the lower image contrast of remote sensing digital image into account.First,parallel move the effective pixel of the image to 128 according to the mean of the brightness,then the lossless two-way stretch for image contrast of remote sensing digital image is done.With this method,the integrity of image is preserved,and the foundation for remote sensing image synthesis,integration,information extraction and classification is laid.A better visual interpretation of the effect with this method is showed by experiments,and the method is also applicable to a variety of satellite remote sensing digital image preprocessing.