由明暗度提取外形信息

1、由明暗度提取外形信息朱俊0220080198一實(shí)驗(yàn)內(nèi)容1由圖像的明暗度提取外形信息二實(shí)驗(yàn)原理1ShapeFromShading維理解是通過物體表面的明暗度Shading分布去提取得到物體外形212Shading信息的一種表達(dá)方法。人們把明暗度分布的圖像稱為外現(xiàn)圖像（extrinsicimage），把表達(dá)稱為內(nèi)在圖像（intrinsicimage），表示這是排212除了光線的影響后直接反映出物體外形的圖像。2約束方程從外現(xiàn)圖像到內(nèi)在圖像所

2、要做的工作就是解圖像輝度約束方程：I(xy)=R(pq)即11)1()(22220???????ssssqpqpqqppIyxIρ其中為入射光的強(qiáng)度，ρ為物體表面反射系數(shù)0I3迭代求解)]1()1()1()1([41)()]1()1()1()1([41)()()(1)()()()(1)()(N1N1????????????????????????????????yxqyxqyxqyxqyxqyxpyxpyxpyxpyxpqRqpRyxI

3、yxqyxqpRqpRyxIyxpyxpNNNNNNNNNNNNNN｝］｛［λ｝］｛［λ三實(shí)驗(yàn)步驟首先用matlab生成一個(gè)灰度的球，具體操作如下：四實(shí)驗(yàn)結(jié)果迭代的開始點(diǎn)，在遮合邊界上fij0=2，gij0=2，里面點(diǎn)為fij0=0，gij0=0，把圖壓縮成1919的，則迭代結(jié)果為：000000000000000.4341.9520.2211.9880.0002.0000.2211.9880.4341.95200000000000000

4、00000000000.8941.7890.4741.1560.3391.3440.1711.3760.0001.3840.1711.3760.3381.3440.4741.1560.8941.7890000000000000000001.1621.6270.7411.2570.5061.1060.3331.1220.1671.1400.0001.1460.1661.1400.3321.1210.5051.1050.7391.2541.

5、1621.627000000000000001.4141.4140.9321.1020.6870.9940.5150.9780.3490.9990.1781.0230.0001.0300.1771.0230.3490.9990.5130.9750.6870.9930.9321.1021.4141.41400000000001.6271.1621.1220.9270.8580.8380.6930.8340.5420.8630.3780.9

6、010.1950.9310.0000.9430.1950.9310.3780.9000.5420.8630.6920.8340.8580.8381.1220.9271.6271.162000000001.7360.9921.0920.7110.8690.6730.7240.6960.5830.7440.4170.7990.2200.8420.0000.8580.2190.8420.4170.7990.5830.7440.7240.696

7、0.8690.6731.0920.7111.7360.9920000001.8730.7021.3270.5751.0370.5100.8910.5180.7680.5540.6350.6100.4640.6700.2450.7090.0010.7200.2430.7080.4640.6700.6350.6100.7690.5550.8910.5181.0370.5101.3250.5741.8730.70200001.9400.485

8、1.2730.3591.0380.3380.9190.3560.8140.3920.6850.4400.4940.4790.2510.4890.0010.4830.2480.4860.4940.4780.6860.4400.8170.3940.9190.3571.0380.3381.2720.3591.9400.48500001.9850.2481.2770.1781.0550.1710.9390.1820.8460.2050.7160

9、.2310.4940.2420.2320.2290.0010.2300.2300.2280.4930.2420.7150.2320.8470.2060.9420.1831.0550.1711.2740.1771.9850.24800002.0000.0001.2780.0001.0600.0010.9500.0020.8590.0030.7220.0050.4800.0060.2300.0070.0000.0070.2290.0070.

10、4790.0070.7190.0060.8590.0040.9500.0031.0600.0011.2810.0002.0000.00000001.9850.2481.2740.1761.0550.1690.9390.1790.8460.1990.7130.2210.4900.2280.2300.2140.0000.2140.2290.2140.4880.2260.7130.2200.8460.1980.9390.1781.0550.1

11、681.2740.1761.9850.24800001.9400.4851.2720.3581.0370.3360.9150.3520.8110.3860.6820.4300.4880.4620.2450.4660.0000.4570.2460.4660.4880.4610.6850.4300.8120.3850.9160.3511.0370.3361.2720.3581.9400.48500001.8730.7021.3240.573

12、1.0330.5070.8870.5150.7670.5510.6320.6030.4590.6580.2410.6940.0010.7020.2420.6930.4610.6570.6330.6010.7640.5470.8880.5141.0360.5081.3250.5731.8730.7020000001.7360.9921.0860.7070.8660.6700.7240.6950.5790.7390.4140.7920.21