radon c语言 带注释
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2014-05-15
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1. /*Copyright1993-2003TheMathWorks,Inc.*/
2. /*$Revision:1.13.4.3$$Date:2003/08/0118:11:24$*/
3. /*
4. *RADONC.C.MEXfile
5. *ImplementsRadontransform.
6. *Syntax[P,r]=radon(I,theta)
7. *evaluatestheRadontransformP,ofIalongtheanglesspecifiedbythevectorTHETA
. THETAvaluesmeasureanglecounter-clockwisefromthehorizontalaxis.
8. *THETAdefaultsto[0:179]ifnotspecified.
9. *Theoutputargumentrisavectorgivingthevaluesofrcorrespondingtotherowsof
10. *TheoriginofIiscomputedinthesamewayasoriginsarecomputedinfilter2:theori
ginistheimagecenterroundedtotheupperleft.
11. *Algorithm
12. *TheRadontransformofapoint-massisknown,andtheRadontransformislinear(alth
oughnotshift-invariant).SoweusesuperpositionoftheRadontransformsofeachim
agepixel.Thedispersionofeachpixel(pointmass)alongther-axisisanonlinearfunct
ionofthetaandthepixellocation,sotoimprovetheaccuracy,wedivideeachpixelint
o4submasseslocatedtotheNE,NW,SE,andSWoftheoriginallocation.Spacingof
thesubmassesis0.5inthex-andy-directions.Wealsosmooththeresultinther-
directionbyatriangularsmoothingwindowoflength2.
13. *Reference
14. *RonaldN.Bracewell,Two-DimensionalImaging,Prentice-Hall,
15. *1995,pp.518-525.
16. *S.Eddins1-95
17. */
18.
19. #include<math.h>
20. #include"mex.h"
21.
22. staticvoidradon(double*pPtr,double*iPtr,double*thetaPtr,intM,intN,
23. intxOrigin,intyOrigin,intnumAngles,intrFirst,
24. intrSize);
25.
26. staticcharrcs_id[]="$Revision:1.13.4.3$";
27.
28. #defineMAXX(x,y)((x)>(y)?(x):(y))
29.
30. /*InputArguments*/
31. #defineI(prhs[0])
32. #defineTHETA(prhs[1])
33. #defineOPTION(prhs[2])
34.
35. /*OutputArguments*/
36. #defineP(plhs[0])
资源评论
ZHUQIBING2015-03-13就是MATLAB自己的radon C mex，不能直接在C语言里使用的
StudyC语言2015-04-13表示一个初学者不太容易看懂- hanliliy2019-12-09就是matlab里在C转换，不能直接在C里面用，和一个博客分享在一样，感觉不值这个分
ForrestC2014-10-21没怎么看懂呀！！
renruobing
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