java实现数据平滑

风花雪月小飞龙 · 发表于 2018-2-1 14:20:42

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public class DataSmooth {

/**

*

* @Title: smoothValues

* @Description: 进行数据平滑，平滑为9宫格数据去除最高和最低之后取平均值。

* @param input

* @return

*/

public static float[][] smoothValues(float[][] input) {

float[][] values = new float[input.length][input[0].length];

for (int i = 0; i < input.length; i++) {

for (int j = 0; j < input[0].length; j++) {

if (input[j] == Constants.DEFAULT_EMPTY_DATA) {

values[j] = Constants.DEFAULT_EMPTY_DATA;

continue;

}

float max = 999999;
float min = -999999;
float total = 0;
int count = 0;
for (int m = -1; m < 2; m++) {
for (int n = -1; n < 2; n++) {
if (isValid(input, i - m, j - n) && input[i - m][j - n] != Constants.DEFAULT_EMPTY_DATA) {
total += input[i - m][j - n];
max = buildMax(input[i - m][j - n], max);
min = buildMin(input[i - m][j - n], min);
count++;
}
}
}

if (count > 3) {
total = total - max - min;
values[j] = total / (count - 2);
} else if (count > 0) {
values[j] = total / count;
} else {
values[j] = Constants.DEFAULT_EMPTY_DATA;
}
}
}
return values;
}

private static boolean isValid(float[][] input, int m, int n) {
if (m < 0 || m > input.length - 1) {
return false;
}

if (n < 0 || n > input[0].length - 1) {
return false;
}
return true;
}

private static float buildMax(float input, float max) {
if (input > max || max == 999999) {
max = input;
}
return max;
}

private static float buildMin(float input, float min) {
if (input < min || min == -999999) {
min = input;
}
return min;
}
}

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