如何为图像（Visual Studio的C＃）显示原始数据 [英] How to display raw data as an image (Visual Studio c#)
问题描述
我将接收将被存储在一个字节数组，其中每个2字节是象素值（16比特/像素）的一些原始数据。首先，该数组将包含100×100×2个字节（够了100×100像素的图像）。我想在表格窗口中显示此数据。最后，我想刷新图像用新的数据，使它看起来像一个视频流。没有严格的帧速率是必需的。如何才能做到这一点？在C＃中的任何代码的例子吗？
编辑：
几十类似的问题的一些建议和评论后，我还是不能让这个部落格。这里是什么，我试图做的总体思路，但图像没有在窗体上的图片框中显示。 什么是专门错我的实现，以及如何解决它
//阵列数据I收集
的byte [] dataArray中=新的字节[100 * 100 * 2];
//创建一个指针数据
的IntPtr HGLOBAL = Marshal.AllocHGlobal（100 * 100 * 2）;
//我的数组复制到全球
Marshal.Copy（dataArray中，0，HGLOBAL，dataArray.Length）;
//创建位图：100×100像素，2字节/像素，16bitgrayscale
位图newBitmap =新位图（100，100，2 * 100，PixelFormat.Format16bppGrayScale，HGLOBAL）;
//显示位图
pictureBox1.Image = newBitmap;
//释放内存
Marshal.FreeHGlobal（HGLOBAL）;
的主要问题是，PixelFormat.Format16bppGrayScale不支持（至少在我赢8.1 x64的系统）。所以，你必须转换图像显示之前RGB：
私人无效Form1_Load的（对象发件人，EventArgs五）
{
//创建像素数据就摆在图像，使用2，因为它是16bpp的
随机R =新的随机（）;
INT宽度= 100;
INT高度= 100;
字节[] = pixelValues新的字节[宽*高* 2];
的for（int i = 0; I< pixelValues.Length ++ I）
{
//刚刚创建测试
pixelValues随机像素值[I] =（字节）r.Next（0，256）;
}
变种rgbData = Convert16BitGrayScaleToRgb48（pixelValues，宽度，高度）;
变种的bmp = CreateBitmapFromBytes（rgbData，宽度，高度）;
//显示位图
pictureBox1.Image = BMP;
}
私人静态的byte [] Convert16BitGrayScaleToRgb48（字节[] inBuffer，诠释的宽度，高度INT）
{
INT inBytesPerPixel = 2;
INT outBytesPerPixel = 6;
字节[] = outBuffer新的字节[宽*高* outBytesPerPixel]。
INT inStride =宽* inBytesPerPixel;
INT outStride =宽* outBytesPerPixel;
//通过排
图像的步骤（; Y<高度; INT Y = 0是++）
{
//通过图像分步列
的for（int x = 0; X<宽度; X ++）
{
//获取inbuffer指数和outbuffer指数
INT inIndex =（Y * inStride）+（ X * inBytesPerPixel）;
INT outIndex =（Y * outStride）+（X * outBytesPerPixel）;
字节HIBYTE = inBuffer [inIndex + 1];
字节lobyte = inBuffer [inIndex]
// - [R
outBuffer [outIndex] = lobyte;
outBuffer [outIndex + 1] = HIBYTE;
//摹
outBuffer [outIndex + 2] = lobyte;
outBuffer [outIndex + 3] = HIBYTE;
// B
outBuffer [outIndex + 4] = lobyte;
outBuffer [outIndex + 5 = HIBYTE;
}
}
返回outBuffer;
}
私有静态位图CreateBitmapFromBytes（字节[] pixelValues，诠释的宽度，高度INT）
{
//创建将保存图像数据$图像b $ b BMP位图=新位图（宽度，高度，PixelFormat.Format48bppRgb）;
//获取图像的像素数据
矩形尺寸参考=新的Rectangle（0，0，bmp.Width，bmp.Height）;
的BitmapData picData = bmp.LockBits（尺寸，ImageLockMode.ReadWrite，bmp.PixelFormat）;
IntPtr的pixelStartAddress = picData.Scan0;
//像素数据复制到该位图结构
System.Runtime.InteropServices.Marshal.Copy（pixelValues，0，pixelStartAddress，pixelValues.Length）;
bmp.UnlockBits（picData）;
返回BMP;
}
想法是从的此线程。
I will be receiving some raw data that will be stored in a byte array, where each 2 bytes is a pixel value (16 bits/px). To start with, the array will contain 100x100*2 bytes (enough for a 100x100 pixel image). I would like to display this data in the Form window. Eventually, I would like to refresh the image with the new data to make it look like a video stream. No strict frame rate is required. How can this be done? Any code examples in C#?
EDIT: After some suggestions and reviews of tens of similar questions I still can not get this going. Here's the general idea of what I am trying to do, but the image is not displayed in the picture box on the form. What is specifically wrong with my implementation and how to fix it?
// array of data I collected
byte[] dataArray = new byte[100 * 100 * 2];
//create a pointer to the data
IntPtr hglobal = Marshal.AllocHGlobal(100 * 100 * 2);
// copy my array to global
Marshal.Copy(dataArray, 0, hglobal, dataArray.Length);
// create a bitmap: 100x100 pixels, 2bytes/pixel, 16bitgrayscale
Bitmap newBitmap = new Bitmap(100, 100, 2 * 100, PixelFormat.Format16bppGrayScale, hglobal);
// display bitmap
pictureBox1.Image = newBitmap;
// free the memory
Marshal.FreeHGlobal(hglobal);
The main problem is that PixelFormat.Format16bppGrayScale is not supported (at least on my Win 8.1 x64 system). So you have to convert image to rgb before displaying:
private void Form1_Load(object sender, EventArgs e)
{
//Create pixel data to put in image, use 2 since it is 16bpp
Random r = new Random();
int width = 100;
int height = 100;
byte[] pixelValues = new byte[width * height * 2];
for (int i = 0; i < pixelValues.Length; ++i)
{
// Just creating random pixel values for test
pixelValues[i] = (byte)r.Next(0, 256);
}
var rgbData = Convert16BitGrayScaleToRgb48(pixelValues, width, height);
var bmp = CreateBitmapFromBytes(rgbData, width, height);
// display bitmap
pictureBox1.Image = bmp;
}
private static byte[] Convert16BitGrayScaleToRgb48(byte[] inBuffer, int width, int height)
{
int inBytesPerPixel = 2;
int outBytesPerPixel = 6;
byte[] outBuffer = new byte[width * height * outBytesPerPixel];
int inStride = width * inBytesPerPixel;
int outStride = width * outBytesPerPixel;
// Step through the image by row
for (int y = 0; y < height; y++)
{
// Step through the image by column
for (int x = 0; x < width; x++)
{
// Get inbuffer index and outbuffer index
int inIndex = (y * inStride) + (x * inBytesPerPixel);
int outIndex = (y * outStride) + (x * outBytesPerPixel);
byte hibyte = inBuffer[inIndex + 1];
byte lobyte = inBuffer[inIndex];
//R
outBuffer[outIndex] = lobyte;
outBuffer[outIndex + 1] = hibyte;
//G
outBuffer[outIndex + 2] = lobyte;
outBuffer[outIndex + 3] = hibyte;
//B
outBuffer[outIndex + 4] = lobyte;
outBuffer[outIndex + 5] = hibyte;
}
}
return outBuffer;
}
private static Bitmap CreateBitmapFromBytes(byte[] pixelValues, int width, int height)
{
//Create an image that will hold the image data
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format48bppRgb);
//Get a reference to the images pixel data
Rectangle dimension = new Rectangle(0, 0, bmp.Width, bmp.Height);
BitmapData picData = bmp.LockBits(dimension, ImageLockMode.ReadWrite, bmp.PixelFormat);
IntPtr pixelStartAddress = picData.Scan0;
//Copy the pixel data into the bitmap structure
System.Runtime.InteropServices.Marshal.Copy(pixelValues, 0, pixelStartAddress, pixelValues.Length);
bmp.UnlockBits(picData);
return bmp;
}
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