关于5 x 5滤镜问题 [英] About 5 x 5 Filter Problem
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问题描述
亲爱的
最近，我尝试对5 x 5中值滤镜进行编程.现在，我遇到了一个超出图像范围的问题(例如内部的错误)，我无法弄清楚.这将在mask5 [7] = ImgData [x，y-1，0];
处停止
谁能告诉我我需要弄清楚哪一部分?
非常感谢
杰基
Dear
Recently I tried to program about 5 x 5 median filter. Now I got a problem about out of image range (like bugs inside) that I can''t figure it out. This will stop at mask5[7] = ImgData[x, y - 1, 0];
Could anyone tell me which part I need to figure it out?
Thanks a lot
Jacky
public void Fivefilter(int[, ,] ImgData)
{
int Width = ImgData.GetLength(0);
int Height = ImgData.GetLength(1);
// 5 x 5 mask
int[] mask5 = new int[25];
for (int k = 0; k < 25; k++)
{
mask5[k] = 1;
}
// 5x5 for loop
for (int x = 0; x < Width; x++)
{
for (int y = 0; y < Height; y++)
{
// If_Else
if (x - 2 >= 0 && y - 2 >= 0)
{
mask5[0] = ImgData[x - 2, y - 2, 0];
}
else
{
mask5[0] = 0;
}
if (y - 2 >= 0)
{
mask5[1] = ImgData[x - 1, y - 2, 0];
}
else
{
mask5[1] = 0;
}
if (y - 2 >= 0)
{
mask5[2] = ImgData[x, y - 2, 0];
}
else
{
mask5[2] = 0;
}
if (y - 2 >= 0)
{
mask5[3] = ImgData[x + 1, y - 2, 0];
}
else
{
mask5[3] = 0;
}
if (x + 2 < Width && y - 2 >= 0)
{
mask5[4] = ImgData[x + 2, y - 2, 0];
}
else
{
mask5[4] = 0;
}
if (x - 2 >= 0)
{
mask5[5] = ImgData[x - 2, y - 1, 0];
}
else
{
mask5[5] = 0;
}
if (x - 1 >= 0)
{
mask5[6] = ImgData[x - 1, y - 1, 0];
}
else
{
mask5[6] = 0;
}
if (x >= 0)
{
mask5[7] = ImgData[x, y - 1, 0];
}
else
{
mask5[7] = 0;
}
if (x + 1 >= 0)
{
mask5[8] = ImgData[x + 1, y - 1, 0];
}
else
{
mask5[8] = 0;
}
if (x + 2 < Width)
{
mask5[9] = ImgData[x + 2, y - 1, 0];
}
else
{
mask5[9] = 0;
}
if (x - 2 >= 0)
{
mask5[10] = ImgData[x - 2, y, 0];
}
else
{
mask5[10] = 0;
}
if (x - 1 >= 0)
{
mask5[11] = ImgData[x - 1, y, 0];
}
else
{
mask5[11] = 0;
}
if (x + 1 >= 0)
{
mask5[12] = ImgData[x + 1, y, 0];
}
else
{
mask5[12] = 0;
}
if (x + 2 < Width)
{
mask5[13] = ImgData[x + 2, y, 0];
}
else
{
mask5[13] = 0;
}
if (x - 2 >= 0)
{
mask5[14] = ImgData[x - 2, y + 1, 0];
}
else
{
mask5[14] = 0;
}
if (x - 1 >= 0)
{
mask5[15] = ImgData[x - 1, y + 1, 0];
}
else
{
mask5[15] = 0;
}
if (x >= 0)
{
mask5[16] = ImgData[x, y + 1, 0];
}
else
{
mask5[16] = 0;
}
if (x + 1 >= 0)
{
mask5[17] = ImgData[x + 1, y + 1, 0];
}
else
{
mask5[17] = 0;
}
if (x + 2 < Width)
{
mask5[18] = ImgData[x + 2, y + 1, 0];
}
else
{
mask5[18] = 0;
}
if (y + 2 < Height)
{
mask5[19] = ImgData[x - 2, y + 2, 0];
}
else
{
mask5[19] = 0;
}
if (y + 2 < Height)
{
mask5[20] = ImgData[x - 1, y + 2, 0];
}
else
{
mask5[20] = 0;
}
if (y + 2 < Height)
{
mask5[21] = ImgData[x, y + 2, 0];
}
else
{
mask5[21] = 0;
}
if (y + 2 < Height)
{
mask5[22] = ImgData[x + 1, y + 2, 0];
}
else
{
mask5[22] = 0;
}
if (x + 2 < Width && y + 2 < Height)
{
mask5[23] = ImgData[x + 2, y + 2, 0];
}
else
{
mask5[23] = 0;
}
// Center Mask
mask5[24] = ImgData[x, y, 0];
Array.Sort(mask5);
// Middle integer Value
int mid = mask5[13];
ImgData[x, y, 0] = ImgData[x, y, 1] = ImgData[x, y, 2] = mid;
}
}
}
推荐答案
考虑当x = 0和y = 0时的情况，那么您提到的行将是:
mask5[7] = ImgData[0, -1, 0]会抛出IndexOutOfRange异常.
您需要更新if语句，以确保您没有负索引(或x> Width，y> Heigth).
对于这种情况，您需要更新:
if (x >= 0)
到
if (x >= 0 and y >= 1)
Consider case when x=0 and y=0, then the line you mentioned would be:
mask5[7] = ImgData[0, -1, 0]which will throw IndexOutOfRange exception.
you need to update if statements to make sure you don''t have negative indexes (or x>Width,y>Heigth).
For this case you need to update:
if (x >= 0)
to
if (x >= 0 and y >= 1)
这篇关于关于5 x 5滤镜问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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