IDL語言-天文應課程內(nèi)4.圖像處123 圖像修）的子數(shù)組。IDL>world=IDL>posed=0,retain=2IDL>tvlct,r,g,bIDL>africa=world[312:475,103:264]IDL>window,2,xsize=(475-312+1),ysize=(264-103+1)IDL>Cursor:獲得鼠標在顯示窗口上的坐標，關鍵字：/data,/ 填3重采樣：congrid、rebin、expand）平移 翻轉 旋轉：rotate、掩 IDL>file=filepath('worldelv.dat',subdirectory=IDL>imgs=IDL>image=read_binary(file,data_dims=imgs)IDL>posed=0IDL>loadct,38'WorldElevation'IDL>tv,imageIDL>oceanmask=imageLT125IDL>=image*oceanMask='Oceans(left)andResultingImage(right)'IDL>IDL> proroiposed=0,retain=2kneeImgdims=kneeImg=;選擇多邊形股骨為 atistics=femurStats,/block=dims[1],'.1,orientation=315,/device 面積=',femurGeom.area,'周

像素=其他處快速傅里葉變換小波變?yōu)V波圖像平邊緣檢形狀提取和分erodedilate練習請 數(shù)據(jù)分 基礎數(shù)學庫和IMSL（InternationalMathematicsStatisticsLibrary）數(shù)學庫。基礎數(shù)學數(shù)學類函數(shù)絕對值平方根:求和四舍五入反余弦:自然對數(shù)以10為底對數(shù)反正弦反正切atan雙曲余cosh自然指數(shù)exp雙曲正弦sinh正切tan雙曲正切?塞爾函數(shù)beselibeseljbeselkplot,x,beselj(x,0),title=‘JandKBesselFunctions’d導數(shù)和d proplot_h_v擬合函

指數(shù)擬prox=0.1*indgen(20)a0=15.0a1=2.4a2=10.0自定義函數(shù)擬;;利用函數(shù)F(x)=a*exp(b*x)+c擬合，首先計算各個參數(shù)微分;df/da=;df/db=a*x*;df/dc=PROgfunct,x,a,f,pderf=a[0]*EXP(a[1]*x)+;Iftheprocedureiscalledwithfourparameters,calculate;partialIFN_PARAMS()GE4THENpder[*,0]=EXP(a[1]*x)pder[*,1]=a[0]*x*EXP(a[1]*x)pder[*,2]=replicate(1.0,n_elements(x));prolog_fit_youselfx=FLOAT(INDGEN(10))y=[12.0,11.0,10.2,9.4,8.7,8.1,7.5,6.9,6.5,;Defineavectorofweights.weights=1.0/y;Provideaninitialguessofthefunction’sparameters.a=[10.0,-0.1,2.0];Computetheyfit=CURVEFIT(x,y,weights,a,sigma,;PrinttheparametersreturnedinA.PRINT,'Functionparameters:',Ay_new=a[0]*exp(a[1]*x)+a[2]插 相關分 x=[257,208,296,324,240,246,267,311,324,323,263,305,270,260,251,275,288,242,304,267]y=[201,56,185,221,165,161,182,239,278,243,197,271,214,216,175,192,208,150,281,196]plot,x,y,psym=1print,"Spearman's(rho)rankcorrelation:",r_correlate(x,y)print,"Kendall's(tau)rankcorrelation:",r_correlate(x,y,/kendall)end統(tǒng) 域變 pro序列圖像處時間序列圖像處練習a=0.2,b=0.01,c=0.3,考核題 使用的函數(shù)有restore,strtrim,string,size,window,mpeg_open,2.mpeg_put,mpeg_save,mpeg_close,loadct,tvscl,alog,device,xyouts,tvrd等?？梢酝ㄟ^數(shù)組取大、取小以及取對數(shù)