大庆师范学院学报
大慶師範學院學報
대경사범학원학보
JOURNAL OF DAQING NORMAL UNIVERSITY
2014年
6期
24-27
,共4页
张丽丽%苏训%陈鑫%邓雨巍%陈春雨%张天垚%姜瀚
張麗麗%囌訓%陳鑫%鄧雨巍%陳春雨%張天垚%薑瀚
장려려%소훈%진흠%산우외%진춘우%장천요%강한
遥感图像融合%边缘检测%小波变换
遙感圖像融閤%邊緣檢測%小波變換
요감도상융합%변연검측%소파변환
remote sensing image fusion%edge detection%wavelet transformation
针对多光谱图像和全色图像的特点,提出一种边缘检测和小波变换相结合的遥感图像融合方法。该方法在传统图像小波变换的基础上,选择Canny算子对图像进行边缘检测。在小波域中,在各个尺度层对高频子带采用边缘检测,将边缘点完整保留,低频子带利用加权法,再进行小波逆变换重构融合图像。实验结果显示,该方法在保证光谱信息的同时,能有效地突出边缘细节,更好地保持图像的空间分辨力。与传统小波变换法遥感图像融合相比,信息熵提高了6.63%,清晰度提高了32%,相关系数提高了0.36%。
針對多光譜圖像和全色圖像的特點,提齣一種邊緣檢測和小波變換相結閤的遙感圖像融閤方法。該方法在傳統圖像小波變換的基礎上,選擇Canny算子對圖像進行邊緣檢測。在小波域中,在各箇呎度層對高頻子帶採用邊緣檢測,將邊緣點完整保留,低頻子帶利用加權法,再進行小波逆變換重構融閤圖像。實驗結果顯示,該方法在保證光譜信息的同時,能有效地突齣邊緣細節,更好地保持圖像的空間分辨力。與傳統小波變換法遙感圖像融閤相比,信息熵提高瞭6.63%,清晰度提高瞭32%,相關繫數提高瞭0.36%。
침대다광보도상화전색도상적특점,제출일충변연검측화소파변환상결합적요감도상융합방법。해방법재전통도상소파변환적기출상,선택Canny산자대도상진행변연검측。재소파역중,재각개척도층대고빈자대채용변연검측,장변연점완정보류,저빈자대이용가권법,재진행소파역변환중구융합도상。실험결과현시,해방법재보증광보신식적동시,능유효지돌출변연세절,경호지보지도상적공간분변력。여전통소파변환법요감도상융합상비,신식적제고료6.63%,청석도제고료32%,상관계수제고료0.36%。
According to the characteristic of multi-spectral image and panchromatic image, an algorithm for remote sensing image fusion based on edge detection and wavelet transformation is proposed. This approach determines the image edge positions with Canny operator based on traditional wavelet transform algorithm. At each level in wavelet domain, edge detection is used in high frequency subbands to preserve the edge points perfectly. Average-weighted mean is used for low frequency coefficient fusion and then the fusion image is recon-structed by wavelet inverse transform . Experimental results show that the method can not only preserve spectral information but also effectively enhance the edge details and improve the spatial resolution of the image . Compared with the traditional wavelet transform method of remote sensing image fusion ,entropy increases by 6. 63%,definition increases by 32% and correlation coefficient increases by 0. 36%.