| ²é¿´: 3034 | »Ø¸´: 5 | ||
Mickey__Dľ³æ (ÕýʽдÊÖ)
|
[ÇóÖú]
ÔõôÓÃMATLABÉú³ÉÒ»¸öÈýάµÄShepp-LoganÍ·¹ÇÄ£ÐͲ¢±£´æÏÂÀ´£¬Ð»Ð»ÁË
|
| Ö÷ÒªÊÇÓÃÀ´¶Ô¸ÃÄ£ÐͽøÐÐÄ£ÄâͶӰÓõġ£ |
» ²ÂÄãϲ»¶
ºÅÍâºÅÍâ
ÒѾÓÐ11È˻ظ´
ÄÜ·ñÍ˳ö²ÎÓëµÄÃæÉÏÏîÄ¿½â³ýÏÞÏî
ÒѾÓÐ24È˻ظ´
filecode£¬4¸öjtjcÁË
ÒѾÓÐ17È˻ظ´
ÈËÆø²»ÐÐÁË
ÒѾÓÐ9È˻ظ´
ûÓÐÈκÎÏûÏ¢-ÊDz»ÊǾÍÁ¹ÁË
ÒѾÓÐ6È˻ظ´
Èç¹û´Ë¿ÌÄãÕýÔÚΪ¹ú»ù¸Ðµ½½¹ÂÇ£¬²»·ÁÀ´ÌýÌýÕâÊס¶»ù½ðÖ®Íâ¡·
ÒѾÓÐ5È˻ظ´
2026¹ú×ÔÈ»º¯ÆÀ·Ñµ½ÕË
ÒѾÓÐ19È˻ظ´
½¨Òé»ù½ð·¢²¼Ìáǰ¸ø³öÃ÷È·µÄʱ¼äµã
ÒѾÓÐ16È˻ظ´
½ñÈÕ²»·Å°ñ£¿Íø´«¹ú×ÔȻԤ¼Æ 8 Ô 27 Èտɲé½á¹û
ÒѾÓÐ21È˻ظ´
¹À¼ÆÊÇÖÜËÄ
ÒѾÓÐ4È˻ظ´
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
¸ÐлСľ³æÕâ¸öƽ̨£¬´ó¼ÒÔÚÕâÀï¸Ðµ½²»¹Â¶À¡£
ÒѾÓÐ3È˻ظ´
ѯÎÊͶ¸å״̬£¬°Ýл
ÒѾÓÐ6È˻ظ´
СµÜÐÂѧmatlab£¬Ïë½èÓà fminconÇó¸öº¯ÊýµÄ×îСֵ£¬ÇóÖú´íÎó¸Ã·¨£¬¸Ðл£¡
ÒѾÓÐ4È˻ظ´
ÈçºÎÓÃMatlab»z¹ØÓÚxºÍyµÄº¯Êýͼ£¿Ð»Ð»´ó¼Ò£¡
ÒѾÓÐ8È˻ظ´
Çó¸÷λǰ±²°ï棡matlab½â¸´Êý·½³Ì£¬³öÏÖͼÖеľ¯¸æ£¬ÔõÀ´ÐÞ¸ÄÄØ£¿Ð»Ð»Á˰¡
ÒѾÓÐ5È˻ظ´
ÔõÑù½«txtÎļþ¶ÁÈëµ½matlabÖУ¬Ð»Ð»À²
ÒѾÓÐ4È˻ظ´
¡¾ÇóÖú¡¿³õѧmatlab Çë½ÌÒ»¸öºÜ¼òµ¥µÄÎÊÌ⠷dz£¸Ðл¸ßÊÖÃÇ
ÒѾÓÐ3È˻ظ´
¡¾ÇóÖú¡¿Çë½ÌÒ»¸ömatlab³ÌÐò£¬Ð»Ð»°ï棡£¡
ÒѾÓÐ15È˻ظ´
¡¾ÇóÖú¡¿matlabÔõôÇó½âƫ΢·Ö·½³Ì×é°¡£¬ÏÈллÁË
ÒѾÓÐ13È˻ظ´

ÐÐ×ßµÄÁ÷ÀËÕß
гæ (³õÈëÎÄ̳)
- Ó¦Öú: 5 (Ó×¶ùÔ°)
- ½ð±Ò: 33.2
- É¢½ð: 5
- Ìû×Ó: 20
- ÔÚÏß: 13.3Сʱ
- ³æºÅ: 1533133
- ×¢²á: 2011-12-11
- רҵ: ¼ÆËã»úÓ¦Óü¼Êõ
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-12-14 22:27:54
Mickey__D(½ð±Ò+5): ·Ç³£¸ÐлÁË¡£ 2011-12-15 08:29:14
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-12-14 22:27:54
Mickey__D(½ð±Ò+5): ·Ç³£¸ÐлÁË¡£ 2011-12-15 08:29:14
|
ÎÒÆæ¹ÖµÄÊÇÄãÕâ¸öÎÊÌâΪʲôûÓÐÈ˻ش𣿲¢²»ÄÑ£¬°¥¡£Ï£Íû´ó¼Ò¶¼ÈÈÐÄÀ´ÌÖÂÛ°¡~~~ºÇºÇ~~~ shepp-logan´óÄÔͼÊÇÓÉͼÏñ´¦Àí¹¤¾ßÏ亯Êýphantom´´½¨µÄ¡£ Ê×ÏȲúÉúÒ»¸ö256»Ò¶È¼¶µÄ´óÄÔͼ£º p=phantom(256); imshow(p); ÁíÍâͶӰºÍÖØ½¨µÄ³ÌÐòÎÒÒ²ÌæÄã±àÁ˰ɣ¡ randon±ä»»£º theta1=0:0:170,theta2=0:5:175;theta3=0:2:178; [R1,xp]=radon(P,theta1); [R2,xp]=radon(P,theta2); [R3,xp]=radon(P,theta3); figure,imagesc(theta3,xp,R3); colormap(hot);colorbar xlabel(' \theta ' );ylabel(' x\prime ' ); %ÀûÓò»Í¬²¿·ÖµÄrandonÄæ±ä»»À´Öع¹Í¼Ïñ I1=iradon(R1,10);I2=iradon(R2,5);I3=iradon(R3,2); subplot(1,3,1); imshow(I1);title('ÓÃR1ÖØ¹¹Í¼Ïñ'); subplot(1,3,2); imshow(I2);title('ÓÃR2ÖØ¹¹Í¼Ïñ'); subplot(1,3,3); imshow(I3);title('ÓÃR3ÖØ¹¹Í¼Ïñ'); ÒÔÉϳÌÐò±¾ÈËÇ××ÔÓÃmatlabΪÄãÑéÖ¤¹ý£¬Ö±½ÓµÃͼÏñ¡£ È绹Óв»¶®µÄÎÊÌ⣬¿É½»Á÷¡£ |
2Â¥2011-12-14 20:49:58
ÐÐ×ßµÄÁ÷ÀËÕß
гæ (³õÈëÎÄ̳)
- Ó¦Öú: 5 (Ó×¶ùÔ°)
- ½ð±Ò: 33.2
- É¢½ð: 5
- Ìû×Ó: 20
- ÔÚÏß: 13.3Сʱ
- ³æºÅ: 1533133
- ×¢²á: 2011-12-11
- רҵ: ¼ÆËã»úÓ¦Óü¼Êõ
¡ï ¡ï
xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-12-15 21:25:03
xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-12-15 21:25:03
|
theta1=0:0:170ȷʵÓÐÎÊÌ⣬Ӧ¸Ã¸ÄΪtheta1=0:10:170.±íʾR1²ÉÓÃ18¸öͶӰ¡£Äã˵µÄ±£´æÎª.***Îļþ¸ñʽ£¬ÏÂÀ²Ëµ¥ÀïȷʵûÓÐÕâÖÖ¸ñʽ£¬ÕâÖÖ¸ñʽµÄͼƬÎÒҲûÓÐÄÃÀ´×ö¹ýʵÑé¡£ÖÁÓÚÉú³ÉÈýάͷ¸Ç¹ÇÄ£ÐÍ£¬ºô»½ÈÈÐÄÈË.... 'Shepp-Logan' A test image used widely by researchers in tomography 'Modified Shepp-Logan' (default) A variant of the Shepp-Logan phantom in which the contrast is improved for better visual perception. N is a scalar that specifies the number of rows and columns in P. If you omit the argument, N defaults to 256. P = PHANTOM(E,N) generates a user-defined phantom, where each row of the matrix E specifies an ellipse in the image. E has six columns, with each column containing a different parameter for the ellipses: Column 1: A the additive intensity value of the ellipse Column 2: a the length of the horizontal semi-axis of the ellipse Column 3: b the length of the vertical semi-axis of the ellipse Column 4: x0 the x-coordinate of the center of the ellipse Column 5: y0 the y-coordinate of the center of the ellipse Column 6: phi the angle (in degrees) between the horizontal semi-axis of the ellipse and the x-axis of the image For purposes of generating the phantom, the domains for the x- and y-axes span [-1,1]. Columns 2 through 5 must be specified in terms of this range. [P,E] = PHANTOM(...) returns the matrix E used to generate the phantom. Class Support ------------- All inputs must be of class double. All outputs are of class double. Remarks ------- For any given pixel in the output image, the pixel's value is equal to the sum of the additive intensity values of all ellipses that the pixel is a part of. If a pixel is not part of any ellipse, its value is 0. The additive intensity value A for an ellipse can be positive or negative; if it is negative, the ellipse will be darker than the surrounding pixels. Note that, depending on the values of A, some pixels may have values outside the range [0,1]. ĿǰÎÒËùÖªµÀÒ²¾ÍÕâô¶à£¬Ò²ÔÚѧ£¬Ñ§µÃÔ½¶à²ÅÖªµÀ×Ô¼º»áµÄÔ½ÉÙ....ÇëÎÊÄãÊÇҽѧͼÏñ´¦ÀíµÄÂ𣿠|
3Â¥2011-12-15 13:22:40
ÐÐ×ßµÄÁ÷ÀËÕß
гæ (³õÈëÎÄ̳)
- Ó¦Öú: 5 (Ó×¶ùÔ°)
- ½ð±Ò: 33.2
- É¢½ð: 5
- Ìû×Ó: 20
- ÔÚÏß: 13.3Сʱ
- ³æºÅ: 1533133
- ×¢²á: 2011-12-11
- רҵ: ¼ÆËã»úÓ¦Óü¼Êõ
¡ï
xiegangmai(½ð±Ò+1): лл²ÎÓ룡 2011-12-15 21:25:13
xiegangmai(½ð±Ò+1): лл²ÎÓ룡 2011-12-15 21:25:13
|
ÄãµÄÐÂÎÊÌ⣬¹ØÓÚÈýάͼÐÎÈçºÎÐýת¡£Îҵķ½°¸ÊÇ£º ʹÓÃrotate3Dº¯ÊýÃüÁî¡£Àý£º surf(peaks(20)); rotate3D ÔÚͼÐδ°¿ÚµÄͼÐÎÇøÓòÄÚ°´×¡Êó±ê×ó¼ü²»·Å£¬À´µ÷½ÚÊӽǡ£¿ÉÒÔ´Ó²»Í¬µÄ½Ç¶ÈÀ´¹Û²ìËù»æµÃµÄͼÐΡ£ Ï£Íû¶ÔÄãÓÐÓã¬ÓÐÎÊÌâ¼ÌÐø½»Á÷¡£ |
4Â¥2011-12-15 20:40:15
Mickey__D
ľ³æ (ÕýʽдÊÖ)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 3748.3
- É¢½ð: 58
- ºì»¨: 1
- Ìû×Ó: 329
- ÔÚÏß: 70Сʱ
- ³æºÅ: 1406330
- ×¢²á: 2011-09-18
- ÐÔ±ð: GG
- רҵ: ¼ÆËãÊýѧÓë¿ÆÑ§¹¤³Ì¼ÆËã

5Â¥2011-12-16 08:09:35
Mickey__D
ľ³æ (ÕýʽдÊÖ)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 3748.3
- É¢½ð: 58
- ºì»¨: 1
- Ìû×Ó: 329
- ÔÚÏß: 70Сʱ
- ³æºÅ: 1406330
- ×¢²á: 2011-09-18
- ÐÔ±ð: GG
- רҵ: ¼ÆËãÊýѧÓë¿ÆÑ§¹¤³Ì¼ÆËã

6Â¥2011-12-16 08:09:56









»Ø¸´´ËÂ¥
20