matlab interp1db,matlab – Matlab interp1图出现数据偏移 – 堆栈内存溢出

本质上，我正在尝试使用Matlab的interp1方法平滑图像分割中的轮廓线。 不幸的是，interp1表现不佳，可能是因为我使用不正确。 我的插值代码如下：

y2 = interp1(x, y, ‘nearest’);

然后，我尝试将原始x值对y2以及原始函数作图(请参见附图)。

plot(x, y2, ‘x’);

我认为插值可以使原始函数平滑(在某种程度上可以做到)，但是interp1方法似乎偏离了原点并旋转了。 我希望这个结果与原始数据更加一致。 任何指导将不胜感激。

+——————+——————+

| y | x |

+——————+——————+

| 37.9838709677419 | 1 |

| 38 | 1.02500000000000 |

| 38.9750000000000 | 2 |

| 38.9935064935065 | 3.00000000000000 |

| 39 | 3.08333333333333 |

| 39.9166666666667 | 4 |

| 39.9935064935065 | 5.00000000000000 |

| 40 | 5.01562500000000 |

| 40.9843750000000 | 6 |

| 40.9928571428571 | 7 |

| 41 | 7.01388888888889 |

| 41.9861111111111 | 8 |

| 42 | 8.01388888888889 |

| 42.9861111111111 | 9 |

| 42.9966216216216 | 10 |

| 43 | 10.0055555555556 |

| 43.9944444444445 | 11.0000000000000 |

| 44 | 11.0384615384615 |

| 44.9615384615385 | 12 |

| 44.9948979591837 | 13 |

| 45 | 13.0555555555556 |

| 45.9444444444444 | 14 |

| 45.9848484848485 | 15 |

| 46 | 15.0333333333333 |

| 46.9666666666667 | 16 |

| 46.9916666666667 | 17 |

| 46.9939759036145 | 18 |

| 47 | 18.0357142857143 |

| 47.9642857142857 | 19 |

| 47.9861111111111 | 20 |

| 48 | 20.0098039215686 |

| 48.9901960784314 | 21.0000000000000 |

| 49 | 21.0074626865672 |

| 49.9925373134328 | 22 |

| 50 | 22.0076923076923 |

| 51 | 22.1000000000000 |

| 51.9000000000000 | 23 |

| 52 | 23.0500000000000 |

| 52.9500000000000 | 24.0000000000000 |

| 53 | 24.0161290322581 |

| 53.9838709677419 | 25 |

| 54 | 25.0217391304348 |

| 54.9782608695652 | 26 |

| 55 | 26.1666666666667 |

| 55.8333333333333 | 27 |

| 55.9886363636364 | 28 |

| 56 | 28.0087719298246 |

| 56.9912280701754 | 29 |

| 56.9935897435897 | 30 |

| 57 | 30.1000000000000 |

| 57.9000000000000 | 31.0000000000000 |

| 57.9722222222222 | 32 |

| 58 | 32.1250000000000 |

| 58.8750000000000 | 33 |

| 58.9782608695652 | 34 |

| 58.9687500000000 | 35 |

| 58.9883720930233 | 36.0000000000000 |

| 59 | 36.0833333333333 |

| 59.9166666666667 | 37 |

| 59.9736842105263 | 38 |

| 60 | 38.1000000000000 |

| 60.9000000000000 | 39 |

| 60.9750000000000 | 40 |

| 61 | 40.0113636363636 |

| 61.9886363636364 | 41 |

| 61.9883720930233 | 42 |

| 62 | 42.0714285714286 |

| 62.9285714285714 | 43 |

| 63 | 43.0357142857143 |

| 64 | 43.0714285714286 |

| 65 | 43.1000000000000 |

| 66 | 43.0833333333333 |

| 67 | 43.0833333333333 |

| 68 | 43.0625000000000 |

| 69 | 43.0384615384615 |

| 70 | 43.0166666666667 |

| 71 | 43.0106382978723 |

| 71.1666666666667 | 43 |

| 72 | 42.1666666666667 |

| 73 | 42.0833333333333 |

| 74 | 42.0625000000000 |

| 75 | 42.0625000000000 |

| 76 | 42.1666666666667 |

| 76.8333333333333 | 43 |

| 77 | 43.0142857142857 |

| 78 | 43.0277777777778 |

| 78.9722222222222 | 44 |

| 79 | 44.0064102564103 |

| 79.9935897435898 | 45 |

| 80 | 45.0277777777778 |

| 81 | 45.2500000000000 |

| 81.7500000000000 | 46 |

| 82 | 46.0833333333333 |

| 82.9166666666667 | 47.0000000000000 |

| 83 | 47.0166666666667 |

| 84 | 47.1250000000000 |

| 84.8750000000000 | 48 |

| 85 | 48.0131578947368 |

| 86 | 48.0714285714286 |

| 86.9285714285714 | 49 |

| 87 | 49.5000000000000 |

| 87.5000000000000 | 50 |

| 88 | 50.0714285714286 |

| 88.9285714285714 | 51.0000000000000 |

| 89 | 51.0178571428571 |

| 89.9821428571429 | 52 |

| 89.9583333333333 | 99 |

| 89.9923076923077 | 100 |

| 89.9938271604938 | 101 |

| 89.9666666666667 | 102 |

| 89.9375000000000 | 103 |

| 90 | 52.0106382978723 |

| 90.9893617021277 | 53 |

| 90.9750000000000 | 85 |

| 90.9915254237288 | 86 |

| 90.9871794871795 | 87 |

| 90.9687500000000 | 88 |

| 90.9583333333333 | 89 |

| 90.9935064935065 | 90 |

| 90.9937500000000 | 91 |

| 90.9807692307692 | 92 |

| 90.9687500000000 | 93 |

| 90.9827586206897 | 94 |

| 90.9814814814815 | 95 |

| 90.9500000000000 | 96.0000000000000 |

| 90.9687500000000 | 97 |

| 90 | 98.9444444444444 |

| 90.9444444444444 | 98 |

| 90 | 103.062500000000 |

| 90.9375000000000 | 104 |

| 90.8333333333333 | 105 |

| 91 | 53.0166666666667 |

| 91.9833333333333 | 54.0000000000000 |

| 91.9687500000000 | 75 |

| 91.9545454545455 | 77 |

| 91.9642857142857 | 78.0000000000000 |

| 91.9444444444444 | 79 |

| 91.8333333333333 | 80 |

| 91.9166666666667 | 81 |

| 91.9000000000000 | 82 |

| 91.5000000000000 | 83 |

| 91 | 84.7500000000000 |

| 91.7500000000000 | 84 |

| 91 | 105.100000000000 |

| 91.9000000000000 | 106 |

| 91.9615384615385 | 107 |

| 91.9500000000000 | 124 |

| 91.9000000000000 | 125 |

| 91.7500000000000 | 126 |

| 91.8750000000000 | 127 |

| 91.9000000000000 | 128 |

| 91.8750000000000 | 129 |

| 92 | 54.0294117647059 |

| 92.9705882352941 | 55 |

| 92.9910714285714 | 56 |

| 92 | 74.9687500000000 |

| 92.9687500000000 | 74 |

| 92 | 75.0416666666667 |

| 92 | 76.9583333333333 |

| 92.9583333333333 | 76.0000000000000 |

| 92 | 107.125000000000 |

| 92.8750000000000 | 108 |

| 92.9687500000000 | 109 |

| 92.9500000000000 | 122.000000000000 |

| 92 | 123.875000000000 |

| 92.8750000000000 | 123 |

| 92 | 129.125000000000 |

| 92.8750000000000 | 130 |

| 93 | 56.0125000000000 |

| 93.9750000000000 | 69.0000000000000 |

| 93.9838709677419 | 70 |

| 93.9761904761905 | 71 |

| 93.9761904761905 | 72.0000000000000 |

| 93 | 73.9500000000000 |

| 93.9500000000000 | 73 |

| 93 | 109.071428571429 |

| 93.9285714285714 | 110.000000000000 |

| 93 | 121.968750000000 |

| 93.9687500000000 | 121 |

| 93 | 130.083333333333 |

| 93.9166666666667 | 131 |

| 94 | 56.0625000000000 |

| 94.9375000000000 | 57 |

| 94.9838709677419 | 58 |

| 94.9864864864865 | 59 |

| 94.9893617021277 | 66 |

| 94.9722222222222 | 67 |

| 94.0000000000000 | 68.9833333333333 |

| 94.9833333333333 | 68 |

| 94 | 110.062500000000 |

| 94.9375000000000 | 111 |

| 94.9861111111111 | 112.000000000000 |

| 94.9861111111111 | 115.000000000000 |

| 94.9933333333333 | 119 |

| 94 | 120.980769230769 |

| 94.9807692307692 | 120 |

| 94 | 131.012820512821 |

| 94.9871794871795 | 132 |

| 95 | 59.0384615384615 |

| 95.9615384615385 | 60 |

| 95.9807692307692 | 61.0000000000000 |

| 95.9722222222222 | 62 |

| 95.9838709677419 | 63 |

| 95.9852941176471 | 64 |

| 95 | 65.9583333333333 |

| 95.9583333333333 | 65 |

| 95 | 112.026315789474 |

| 95.9736842105263 | 113 |

| 95 | 114.994252873563 |

| 95.9942528735632 | 114 |

| 95 | 115.015151515152 |

| 95.9848484848485 | 116 |

| 95.9893617021277 | 117.000000000000 |

| 95 | 118.982142857143 |

| 95.9821428571429 | 118 |

| 95 | 132.014705882353 |

| 95.9852941176471 | 133.000000000000 |

| 95.9954545454546 | 134 |

| 96 | 134.014285714286 |

| 96.9857142857143 | 135 |

| 97 | 135.022727272727 |

| 97.9772727272727 | 136 |

| 98 | 136.021739130435 |

| 98.9782608695652 | 137 |

| 99 | 137.038461538462 |

| 99.9615384615385 | 138.000000000000 |

| 100 | 138.022727272727 |

| 100.977272727273 | 139 |

| 101 | 139.041666666667 |

+——————+——————+