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matlab画频率直方图，支持颜色变换

2016-06-02 21:28 330 查看

clear;
C=[0.001393,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.000000,
0.001393,
0.000000,
0.000000,
0.001393,
0.002786,
0.002786,
0.004178,
0.002786,
0.001393,
0.002786,
0.004178,
0.005571,
0.004178,
0.009749,
0.008357,
0.008357,
0.011142,
0.011142,
0.019499,
0.025070,
0.051532,
0.094708,
0.015320,
0.011142,
0.009749,
0.008357,
0.011142,
0.011142,
0.011142,
0.009749,
0.009749,
0.006964,
0.011142,
0.006964,
0.006964,
0.006964,
0.005571,
0.012535,
0.008357,
0.006964,
0.005571,
0.005571,
0.006964,
0.001393,
0.004178,
0.008357,
0.004178,
0.006964,
0.002786,
0.005571,
0.002786,
0.005571,
0.005571,
0.004178,
0.001393,
0.004178,
0.002786,
0.000000,
0.005571,
0.006964,
0.004178,
0.006964,
0.004178,
0.002786,
0.000000,
0.002786,
0.001393,
0.011142,
0.004178,
0.002786,
0.004178,
0.001393,
0.004178,
0.005571,
0.006964,
0.004178,
0.004178,
0.001393,
0.000000,
0.002786,
0.000000,
0.001393,
0.004178,
0.000000,
0.001393,
0.002786,
0.000000,
0.001393,
0.002786,
0.002786,
0.000000,
0.002786,
0.001393,
0.001393,
0.000000,
0.000000,
0.001393,
0.002786,
0.001393,
0.000000,
0.000000,
0.002786,
0.001393,
0.004178,
0.000000,
0.002786,
0.004178,
0.002786,
0.000000,
0.000000,
0.001393,
0.000000,
0.001393,
0.004178,
0.002786,
0.000000,
0.001393,
0.000000,
0.001393,
0.001393,
0.002786,
0.002786,
0.005571,
0.002786,
0.000000,
0.002786,
0.002786,
0.000000,
0.001393,
0.001393,
0.002786,
0.001393,
0.005571,
0.001393,
0.004178,
0.004178,
0.002786,
0.001393,
0.002786,
0.004178,
0.004178,
0.002786,
0.004178,
0.004178,
0.002786,
0.001393,
0.005571,
0.001393,
0.001393,
0.000000,
0.002786,
0.006964,
0.002786,
0.004178,
0.002786,
0.002786,
0.004178,
0.000000,
0.006964,
0.005571,
0.004178,
0.006964,
0.001393,
0.005571,
0.002786,
0.004178,
0.002786,
0.002786,
0.004178,
0.005571,
0.001393,
0.004178,
0.002786,
0.001393,
0.001393,
0.002786,
0.004178,
0.004178,
0.001393,
0.001393,
0.004178,
0.004178,
0.002786,
0.002786,
0.006964,
0.004178,
0.001393,
0.001393,
0.006964,
0.005571,
0.001393,
0.001393,
0.001393,
0.002786,
0.001393,
0.000000,
0.001393,
0.000000,
0.000000,
0.000000,
0.001393,
0.004178,
0.000000,
0.001393,
0.001393,
0.000000,
0.000000,
0.087744
];
cor=bar(0:255,C,'stacked','k');
xlabel('灰度值');
ylabel('概率');
axis([0 260 0 0.16]);
title('直方图3');

输入一个数组，即图像灰度的频率值。bar函数分别记录x，y轴元素的值，然后用k表示黑色， axis设置坐标轴范围。

结果

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