私はこれを理解しようとしています。プログラムで画像を比較しています。画像を比較しようとすると、ほとんどの場合、問題はありません。いくつかの異なる組み合わせを使用すると、このエラーが発生します。元々は画像フォーマットが違うからだと思っていました。そうではありませんが。
各画像を取得して他の画像と比較すると、正常に機能します。互いに比較した場合ではありません。エラーが表示される場所を以下にマークしました。
public Color this[int x, int y]
{
get
{
int index = (x + (y * image.Width)) * 4;
return Color.FromArgb(rgbValues[index + 3], rgbValues[index + 2], rgbValues[index + 1], rgbValues[index]); //This line is where the index out of bounds of the array error happens.
}
set
{
int index = (x + (y * image.Width)) * 4;
rgbValues[index] = value.B;
rgbValues[index + 1] = value.G;
rgbValues[index + 2] = value.R;
rgbValues[index + 3] = value.A;
}
}
/// <summary>
/// Width of the image.
/// </summary>
public int Width
{
get
{
return image.Width;
}
}
/// <summary>
/// Height of the image.
/// </summary>
public int Height
{
get
{
return image.Height;
}
}
/// <summary>
/// Returns the modified Bitmap.
/// </summary>
助けていただければ幸いです。画像を組み合わせて使用した場合にのみ発生する理由がわかりません。
画像をどのようにロードするのか疑問に思っている場合は、vb.net で行います。C# コードは dll にあります。ビットマップをメモリにロードする vb.net コードを次に示します。また、画像サイズ: 431x253
Dim bm As Bitmap = Bitmap.FromFile(Label1.Text)
Dim bm2 As Bitmap = Bitmap.FromFile(Label2.Text)
' Dim pnt As Point = ImageFinder.Contains(bm, bm2)
Dim ir As New ImageChecker(bm, bm2)
Dim imageContains As Boolean = ir.findimageboolean()
MessageBox.Show(imageContains)
編集: DLL の完全なコードは次のとおりです。
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO;
namespace ImageRecognition
{
public class LockedFastImage
{
private Bitmap image;
private byte[] rgbValues;
private System.Drawing.Imaging.BitmapData bmpData;
private IntPtr ptr;
private int bytes;
public LockedFastImage(Bitmap image)
{
this.image = image;
Rectangle rect = new Rectangle(0, 0, image.Width, image.Height);
bmpData = image.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, image.PixelFormat);
ptr = bmpData.Scan0;
bytes = Math.Abs(bmpData.Stride) * image.Height;
rgbValues = new byte[bytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes);
}
~LockedFastImage()
{
// Try to unlock the bits. Who cares if it dont work...
try
{
image.UnlockBits(bmpData);
}
catch { }
}
/// <summary>
/// Returns or sets a pixel of the image.
/// </summary>
/// <param name="x">x parameter of the pixel</param>
/// <param name="y">y parameter of the pixel</param>
public Color this[int x, int y]
{
get
{
int index = (x + (y * image.Width)) * 4;
return Color.FromArgb(rgbValues[index + 3], rgbValues[index + 2], rgbValues[index + 1], rgbValues[index]);
}
set
{
int index = (x + (y * image.Width)) * 4;
rgbValues[index] = value.B;
rgbValues[index + 1] = value.G;
rgbValues[index + 2] = value.R;
rgbValues[index + 3] = value.A;
}
}
/// <summary>
/// Width of the image.
/// </summary>
public int Width
{
get
{
return image.Width;
}
}
/// <summary>
/// Height of the image.
/// </summary>
public int Height
{
get
{
return image.Height;
}
}
/// <summary>
/// Returns the modified Bitmap.
/// </summary>
public Bitmap asBitmap()
{
System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, bytes);
return image;
}
}
public class ImageChecker
{
private LockedFastImage big_image;
private LockedFastImage small_image;
/// <summary>
/// The time needed for last operation.
/// </summary>
public TimeSpan time_needed = new TimeSpan();
/// <summary>
/// Error return value.
/// </summary>
static public Point CHECKFAILED = new Point(-1, -1);
/// <summary>
/// Constructor of the ImageChecker
/// </summary>
/// <param name="big_image">The image containing the small image.</param>
/// <param name="small_image">The image located in the big image.</param>
public ImageChecker(Bitmap big_image, Bitmap small_image)
{
this.big_image = new LockedFastImage(big_image);
this.small_image = new LockedFastImage(small_image);
}
/// <summary>
/// Returns the location of the small image in the big image. Returns CHECKFAILED if not found.
/// </summary>
/// <param name="x_speedUp">speeding up at x achsis.</param>
/// <param name="y_speedUp">speeding up at y achsis.</param>
/// <param name="begin_percent_x">Reduces the search rect. 0 - 100</param>
/// <param name="end_percent_x">Reduces the search rect. 0 - 100</param>
/// <param name="begin_percent_x">Reduces the search rect. 0 - 100</param>
/// <param name="end_percent_y">Reduces the search rect. 0 - 100</param>
public Point bigContainsSmall(int x_speedUp = 4, int y_speedUp = 4, int begin_percent_x = 0, int end_percent_x = 100, int begin_percent_y = 0, int end_percent_y = 100)
{
/*
* SPEEDUP PARAMETER
* It might be enough to check each second or third pixel in the small picture.
* However... In most cases it would be enough to check 4 pixels of the small image for diablo porposes.
* */
/*
* BEGIN, END PARAMETER
* In most cases we know where the image is located, for this we have the begin and end paramenters.
* */
DateTime begin = DateTime.Now;
if (x_speedUp < 1) x_speedUp = 1;
if (y_speedUp < 1) y_speedUp = 1;
if (begin_percent_x < 0 || begin_percent_x > 100) begin_percent_x = 0;
if (begin_percent_y < 0 || begin_percent_y > 100) begin_percent_y = 0;
if (end_percent_x < 0 || end_percent_x > 100) end_percent_x = 100;
if (end_percent_y < 0 || end_percent_y > 100) end_percent_y = 100;
int x_start = (int)((double)big_image.Width * ((double)begin_percent_x / 100.0));
int x_end = (int)((double)big_image.Width * ((double)end_percent_x / 100.0));
int y_start = (int)((double)big_image.Height * ((double)begin_percent_y / 100.0));
int y_end = (int)((double)big_image.Height * ((double)end_percent_y / 100.0));
/*
* We cant speed up the big picture, because then we have to check pixels in the small picture equal to the speeded up size
* for each pixel in the big picture.
* Would give no speed improvement.
* */
//+ 1 because first pixel is in picture. - small because image have to be fully in the other image
for (int x = x_start; x < x_end - small_image.Width + 1; x++)
for (int y = y_start; y < y_end - small_image.Height + 1; y++)
{
//now we check if all pixels matches
for (int sx = 0; sx < small_image.Width; sx += x_speedUp)
for (int sy = 0; sy < small_image.Height; sy += y_speedUp)
{
if (small_image[sx, sy] != big_image[x + sx, y + sy])
goto CheckFailed;
}
//check ok
time_needed = DateTime.Now - begin;
return new Point(x, y);
CheckFailed: ;
}
time_needed = DateTime.Now - begin;
return CHECKFAILED;
}
public Boolean findimageboolean(int x_speedUp = 1, int y_speedUp = 1, int begin_percent_x = 0, int end_percent_x = 100, int begin_percent_y = 0, int end_percent_y = 100)
{
/*
* SPEEDUP PARAMETER
* It might be enough to check each second or third pixel in the small picture.
* However... In most cases it would be enough to check 4 pixels of the small image for diablo porposes.
* */
/*
* BEGIN, END PARAMETER
* In most cases we know where the image is located, for this we have the begin and end paramenters.
* */
DateTime begin = DateTime.Now;
if (x_speedUp < 1) x_speedUp = 1;
if (y_speedUp < 1) y_speedUp = 1;
if (begin_percent_x < 0 || begin_percent_x > 100) begin_percent_x = 0;
if (begin_percent_y < 0 || begin_percent_y > 100) begin_percent_y = 0;
if (end_percent_x < 0 || end_percent_x > 100) end_percent_x = 100;
if (end_percent_y < 0 || end_percent_y > 100) end_percent_y = 100;
int x_start = (int)((double)big_image.Width * ((double)begin_percent_x / 100.0));
int x_end = (int)((double)big_image.Width * ((double)end_percent_x / 100.0));
int y_start = (int)((double)big_image.Height * ((double)begin_percent_y / 100.0));
int y_end = (int)((double)big_image.Height * ((double)end_percent_y / 100.0));
/*
* We cant speed up the big picture, because then we have to check pixels in the small picture equal to the speeded up size
* for each pixel in the big picture.
* Would give no speed improvement.
* */
//+ 1 because first pixel is in picture. - small because image have to be fully in the other image
for (int x = x_start; x < x_end - small_image.Width + 1; x++)
for (int y = y_start; y < y_end - small_image.Height + 1; y++)
{
//now we check if all pixels matches
for (int sx = 0; sx < small_image.Width; sx += x_speedUp)
for (int sy = 0; sy < small_image.Height; sy += y_speedUp)
{
if (small_image[sx, sy] != big_image[x + sx, y + sy])
goto CheckFailed;
}
//check ok
time_needed = DateTime.Now - begin;
return true;
CheckFailed: ;
}
time_needed = DateTime.Now - begin;
return false;
}
}
}