我想調試代碼並運行到此System.IndexOutOfRangeException。有人可以幫助我如何解決它。請查看發生異常的圖像。它會成功讀取「線陣」的第一行,但會發生第二行異常。當i = 1和j = 0
這裏是發生異常:如何處理System.IndexOutOfRangeException
(Image of Exception)(Image of Line Array)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
namespace Handwriting.SVMs
{
static class Features
{
/// <summary>
/// Extracts an image from a text containing the
/// image representation as binary 0s and 1s.
/// </summary>
///
public static Bitmap Extract(string text)
{
Bitmap bitmap = new Bitmap(32, 32, PixelFormat.Format32bppRgb);
string[] lines = text.Split(new String[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < 32; i++)
{
for (int j = 0; j < 32; j++)
{
if (lines[i][j] == '0')
bitmap.SetPixel(j, i, Color.White);
else bitmap.SetPixel(j, i, Color.Black);
}
}
return bitmap;
}
/// <summary>
/// Extracts a feature vector representation from
/// an image, "flattening" a binary image into an
/// array of 0s and 1s.
/// </summary>
///
public static double[] Extract(Bitmap bmp)
{
double[] features = new double[32 * 32];
for (int i = 0; i < 32; i++)
for (int j = 0; j < 32; j++)
features[i * 32 + j] = (bmp.GetPixel(j, i).R == 255) ? 0 : 1;
return features;
}
/// <summary>
/// Converts a feature vector containing 0s and 1s
/// representing each pixel in the image back into
/// an image.
/// </summary>
///
public static Bitmap Export(double[] features)
{
Bitmap bitmap = new Bitmap(32, 32, PixelFormat.Format32bppRgb);
for (int i = 0; i < 32; i++)
for (int j = 0; j < 32; j++)
{
double v = features[i * 32 + j];
v = 255 - Math.Max(0, Math.Min(255, Math.Abs(v) * 255));
bitmap.SetPixel(j, i, Color.FromArgb((int)v, (int)v, (int)v));
}
return bitmap;
}
public static double[] Preprocess(Bitmap bitmap)
{
double[] features = new double[64];
for (int m = 0; m < 8; m++)
{
for (int n = 0; n < 8; n++)
{
int c = m * 8 + n;
for (int i = m * 4; i < m * 4 + 4; i++)
{
for (int j = n * 4; j < n * 4 + 4; j++)
{
Color pixel = bitmap.GetPixel(j, i);
if (pixel.R == 0x00) // white
features[c] += 1;
}
}
}
}
return features;
}
}
}
似乎線路[1] =的String.Empty –
沒有,因爲在'.RemoveEmptyEntries'。我認爲'lines.Length == 1' –
我同意@HenkHolterman。例如,如果在'text'字符串中有一個-------'\ r \ n \ r \ n'(注意空格) – Pikoh