遙感圖像處理_圖像變換

1、圖像變換實(shí)驗(yàn)報(bào)告內(nèi)容?快速傅里葉變換?主成分分析基本操作?代數(shù)運(yùn)算?彩色變換目的在理解原理基礎(chǔ)上，熟悉熟練圖像的幾種常用變換操作步驟三.實(shí)驗(yàn)過(guò)程傅里葉變換1 .打開(kāi)ENVI5.0,并導(dǎo)入CJ_spot遙感影像。圖1:原始影像2 .進(jìn)行傅里葉變換操作C lastification Irantfcirm FiltFr| Sppctrsl Map Vectcir Tnpcgrphii CcnvDlutioris dnd MciplioloqyTexture.AcaptiveFFT FilteringFilter DefinitionInverse FFT圖2:圖像的傅里葉變換k itirartinn

2、 Tr己ndnrrr Filler Spertral Map Vprtnr Topngraphi.圖3:設(shè)定濾波器圖4:選擇阻斷濾波器圖5:自定義多邊形濾波器圖6:繪制自定義濾波器后的圖像Is ClasWfkwtiQn 1an5folm | Filler Spectral Map Vector Topograph圖7:逆變換hoivard 卜卜 1Fi ter DefinitionInverse FFT圖8:波段列表窗口注解T自定乂蘇波號(hào)后再修Mm .iyjn Eazid Math 白國(guó) fMenoiyil- Band Mai;tin MencxyS- 口 Eand gth白.AA- 71 E

3、 白 nd 1。Eand 2口 Rsriri R(Cfloa -float (bS.1 )/(f loat loa：,上3)：)(float (b4-b3)/rio3t (b4+ti3) - T 711fi？fi*rj|卜pt Kesize (Etsize (lets (Eand 5):L711Z& Resile (Resize (Meta (Band. O :L7112:Resize (EeslEE (luta (Eand 3):L711ZC1 01C名門(mén)二匕1Reser1Dins: 2白口0 x 214n (Eytp圖26:選擇RGB俞入為543圖27:選擇全色波段為高分辨率數(shù)據(jù)將（5,4

4、,3 ）進(jìn)行RGB&成顯示，窗口為#1,并對(duì)scroll窗口進(jìn)行圖像的均衡化。然后，點(diǎn)擊上述菜單，選擇#1作為輸入圖31 :均衡化拉伸后輸出圖30:使用圖像數(shù)據(jù)作為輸入彩色正變換IlrFnfrrml Filter Spectral Map Vprtnr Inpagraphif iRadar Window FkInidqu SlidipeninqBdfld RdtiatPrincipal Components Independent ComponentsMINF RotationDecorrelation StrerthPhotographic Stretch圖32:彩色正變換選擇窗口圖33:彩

5、色正變換前圖34:彩色正變換后彩色逆變換Trri/iFcmri | Filter Spec trail MapVector T opogiraphic Rmclmr Window Hrnage SharpeningBand Ratiost _Principal Componnt,【neiependent ComponpnisM NT RotarioD，1| Colior If|* r RGB to HSVD&r o rre 1 at ion StretchRG口 to MLSPhotographic StretchKGB to HSV (UStiS Munsell)Saturn tic n Stretch號(hào)，to RGB SynHietic Color IrTidyeHLS to RGBNDVIHSV to RGB (USGS Muell)Tasseled Cap_BTF