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conanwj: ½ð±Ò+2, Ó¦ÖúÖ¸Êý+1, ¸ÐлӦÖú 2012-07-31 23:02:42
°ÔÍõÏþ(½ð±Ò+1): лл²ÎÓë
conanwj: ½ð±Ò+2, Ó¦ÖúÖ¸Êý+1, ¸ÐлӦÖú 2012-07-31 23:02:42
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¼òµ¥µÄËõ·Å·½·¨ÊÇ ÏßÐÔ²åÖµ£¬µ«ÊǾâ³ÝЧӦ±È½ÏÃ÷ÏÔ£¬ÓŵãÊǼÆËãËٶȿ죻 »¹ÓÐÒ»¸öË«ÏßÐÔ²åÖµ£¬±ÈÏßÐÔ²åÖµÒªºÃ£¬µ«ÊÇËÙ¶ÈÒªÉÔ΢ÂýһЩ¡£ »¹Óиü¼Ó¸´Ôӵģ¬ÏñË«Èý´Î²åÖµ£¬»ùÓÚ±£»¤±ßÔµµÄBresenham²åÖµµÈµÈ¡£ ×îʵÓõϹÊÇË«ÏßÐÔ²åÖµ£¬ÏÂÃæÊÇÒÔǰÎÒдµÄ´úÂ룬Äã¿ÉÒԲο¼Ò»Ï£º /*********************************************** * º¯Êý¹¦ÄÜ£ºÊµÏÖͼÏñµÄËõ·Å¹¦ÄÜ * ÊäÈë²ÎÊý£ºÊäÈëÔʼͼÏñ unsigned char *pSrcImg * ÔʼͼÏñµÄ¿í¶È int SrcWid ÁÐ ¶ÔӦ׸±êJ SrcJ * ÔʼͼÏñµÄ¸ß¶È int SrcHgh ÐÐ ¶ÔӦ׸±êI SrcI * Êä³öËõ·ÅͼÏñ unsigned char *pDstImg * Ëõ·ÅͼÏñµÄ¿í¶È int DstWid * Ëõ·ÅͼÏñµÄ¸ß¶È int DstHgh * ·µ »Ø Öµ£ºº¯ÊýÔËÐгɹ¦ 0 * º¯ÊýÔËÐÐʧ°Ü -1 ***********************************************/ int biLinear(unsigned char *pSrcImg, int SrcWid, int SrcHgh, unsigned char *pDstImg, int DstWid, int DstHgh) { /********************************************************* * ÐèҪעÒâµÄÊÂÇ飺 * 1.¾í»ýʱ¶Ô±ß½çµÄ´¦Àí£¬Í¬Ê±»¹Òª×¢ÒâÓëMATLABµÄ×ø±êÇø±ð * 2.·ÀÖ¹³öÏÖÒç³ö£¬ÏñËØÀàÐÍΪunsigned char£¬·ÀÖ¹´æ´¢³¬¹ý255µÄÖµ ********************************************************/ float HghExp, WidExp ; // ±£´æÐÐÁеÄËõ·ÅÖµ int Si, Sj ; // ±£´æÓ³ÉäÕûÊý×ø±ê float p, q ; // ±£´æÓ³ÉäСÊý×ø±ê int s1, s2, s3, s4; int i, j, flag; if((NULL ==pSrcImg) || (NULL == pDstImg) || (SrcWid < 1) || (SrcHgh <1) || (DstWid < 1) || (DstHgh < 1)) { return -1; } // ¼ÆËãËõ·Å±ÈÀý HghExp = float(DstHgh) / float(SrcHgh); WidExp = float(DstWid) / float(SrcWid); // ²åÖµ¹«Ê½£ºpDstImg(i,j) = (1 - p) * (1 - q) * pSrcImg(Si, Sj ) // + (1 - p) * q * pSrcImg(Si + 1, Sj ) // + p * (1 - q) * pSrcImg(Si, Sj + 1) // + p * q * pSrcImg(Si + 1, Sj + 1); for(i = 1 ; i < DstHgh-1; i++) { for(j = 1; j < DstWid-1 ; j++) { Si = int(i / HghExp); Sj = int(j / WidExp); p = i / HghExp - Si; q = j / WidExp - Sj; s1 = pSrcImg[(Si)*SrcWid + Sj ]; // pSrcImg(Si, Sj) s2 = pSrcImg[(Si + 1)*SrcWid + Sj ]; // pSrcImg(Si + 1, Sj) s3 = pSrcImg[(Si )*SrcWid + Sj+ 1 ]; // pSrcImg(Si, Sj + 1) s4 = pSrcImg[(Si+ 1 ) *SrcWid + Sj+ 1 ]; // pSrcImg(Si + 1, Sj + 1) flag = int((1-p)*(1-q)*s1 + (1-p)*q*s2 + p*(1-q)*s3 + p*q * s4 + 0.5); pDstImg[i*DstWid + j] = (flag > 255)? 255: flag; // ·ÀÖ¹Òç³ö } } return 0; } [ Last edited by denghblzu9237 on 2012-7-31 at 18:53 ] |
2Â¥2012-07-31 18:52:00
3Â¥2012-07-31 19:27:38
4Â¥2012-07-31 19:33:20













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