从二进制数据创建位图

发布于 2025-01-08 15:11:34 字数 866 浏览 0 评论 0原文

我有以下内容：

byte[] pixels = new byte[28] { 0x00, 0x00, 0x30, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x00, 0x00 };

这是一个颠倒的感叹号，如下所示：

0x00, 0x00,
0x30, 0x00,
0x30, 0x00,
0x00, 0x00,
0x00, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x00, 0x00

二进制格式为：

00000000    00000000
00110000    00000000
00110000    00000000
00000000    00000000
00000000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00000000    00000000

我需要将其转换为位图/创建位图。所以感叹号是白色的，背景是黑色的。我还需要能够为像素着色。

如何做到这一点？

原文

I have the following:

byte[] pixels = new byte[28] { 0x00, 0x00, 0x30, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x30, 0x00, 0x00, 0x00 };

This is an upside down exclamation mark like this:

0x00, 0x00,
0x30, 0x00,
0x30, 0x00,
0x00, 0x00,
0x00, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x30, 0x00,
0x00, 0x00

Which in binary is:

00000000    00000000
00110000    00000000
00110000    00000000
00000000    00000000
00000000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00110000    00000000
00000000    00000000

I need to convert this to a bitmap / create a bitmap. So the exclamation mark is white and the background is black. I need to be able to color the pixels also.

How to do this??

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香橙ぽ 2025-01-15 15:11:34

假设所有图像都是 16x14

Bitmap bmp = new Bitmap(16, 14);
int line=0;

for (int i = 0; i < pixels.Length; i++)
{
    for (int j = 0; j<8; j++)
    {
        if (((pixels[i] >> j) & 1) == 1)
        {
            bmp.SetPixel( (i%2)*8 + 7-j, line, Color.Black);
        }
    }
    if(i%2==1) line++;
}

Assuming all your images are 16x14

Bitmap bmp = new Bitmap(16, 14);
int line=0;

for (int i = 0; i < pixels.Length; i++)
{
    for (int j = 0; j<8; j++)
    {
        if (((pixels[i] >> j) & 1) == 1)
        {
            bmp.SetPixel( (i%2)*8 + 7-j, line, Color.Black);
        }
    }
    if(i%2==1) line++;
}

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再见回来 2025-01-15 15:11:34

考虑阅读有关 BMP 格式的维基百科。您将需要它来确保您的数组包含必要的元数据（例如宽度和高度）。进行这些更改后，您可以使用类似的东西

public static Bitmap ToBitmap(byte[] byteArray)
{
   using (var ms = new MemoryStream(byteArray))
   {
     var img = (Bitmap)Image.FromStream(ms);
     return img;
   }
}

Consider reading Wikipedia about BMP format. You will need this to make sure that your array contains necessary meta data (e.g width and height). After making those changes you can use something like this

public static Bitmap ToBitmap(byte[] byteArray)
{
   using (var ms = new MemoryStream(byteArray))
   {
     var img = (Bitmap)Image.FromStream(ms);
     return img;
   }
}

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但可醉心 2025-01-15 15:11:34

据我了解，您想要创建一个与字节数组（您的“感叹号”）内的内容类似的位图。

您可以从头开始创建位图，并使用一些循环，只需在位图中设置像素即可。这是一个在黑色背景上绘制随机白色像素的简单示例。对其进行调整以满足您的要求：

Bitmap zz = new Bitmap(100, 100);

using (Graphics g = Graphics.FromImage(zz))
{
    // Draws a black background
    g.Clear(Color.Black);
}

Random rnd = new Random();
for (int i = 0; i < zz.Height; i++)
{
    for (int j = 0; j < zz.Width; j++)
    {
        // Randomly add white pixels
        if (rnd.NextDouble() > 0.5)
        {
            zz.SetPixel(i, j, Color.White);
        }
    }
}

zz.Save(@"C:\myfile.bmp", ImageFormat.Bmp);

From what I understand, you want to create a bitmap that looks similar to what's inside your byte array (your "exclamation mark").

You can create a bitmap from scratch, and using some loops, simply set pixels in your Bitmap. Here's a simple example that draws random white pixels on a black background. Adapt it to meet your requirements:

Bitmap zz = new Bitmap(100, 100);

using (Graphics g = Graphics.FromImage(zz))
{
    // Draws a black background
    g.Clear(Color.Black);
}

Random rnd = new Random();
for (int i = 0; i < zz.Height; i++)
{
    for (int j = 0; j < zz.Width; j++)
    {
        // Randomly add white pixels
        if (rnd.NextDouble() > 0.5)
        {
            zz.SetPixel(i, j, Color.White);
        }
    }
}

zz.Save(@"C:\myfile.bmp", ImageFormat.Bmp);

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