c# how to make a snapshot in VS and put it inside Birmap

evgeny_k

Hello.

My question is how to make a snapshot in Visual Studio c# and put it inside pictureBox.

I found a sample for Video... But I need a photo.

int bufferSize = Height * Width;

byte buffer = new Byte;

IntPtr dataPtr = Marshal.AllocHGlobal(bufferSize);

camera.GetExposureData(dataPtr, bufferSize);

if (GetVideoData(dataPtr, bufferSize, 0))

{

Marshal.Copy(dataPtr, buffer, 0, bufferSize);

int columns = Width;

int rows = Height;

int stride = columns;

Bitmap im = new Bitmap(columns, rows, stride, PixelFormat.Format8bppIndexed, Marshal.UnsafeAddrOfPinnedArrayElement(buffer, 0));

Bitmap resized = new Bitmap(im, new Size(pictureBox1.Width, pictureBox1.Height));

}

Marshal.FreeHGlobal(dataPtr);

Thanks.

chad

Hi,

In MainForm.cs

SnapThr() function，Line 164.

Please check it.

Thanks

Chad

evgeny_k

I tried to use this code:

----------------------------------

camera.StartExposure(14000, ASICameraDll.ASI_BOOL.ASI_FALSE);

while (camera.ExposureStatus != ASICameraDll.ASI_EXPOSURE_STATUS.ASI_EXP_SUCCESS);

int ch = 1;

int bufferSize = 0; ;

byte buffer;

PixelFormat format = PixelFormat.Format1bppIndexed;

if (camera.CaptureAreaInfo.ImageType == ASICameraDll.ASI_IMG_TYPE.ASI_IMG_RAW8 ||

camera.CaptureAreaInfo.ImageType == ASICameraDll.ASI_IMG_TYPE.ASI_IMG_Y8)

{

ch = 1;

format = PixelFormat.Format8bppIndexed;

}

else if (camera.CaptureAreaInfo.ImageType == ASICameraDll.ASI_IMG_TYPE.ASI_IMG_RAW16)

{

ch = 2;

format = PixelFormat.Format16bppGrayScale;

}

else if (camera.CaptureAreaInfo.ImageType == ASICameraDll.ASI_IMG_TYPE.ASI_IMG_RGB24)

{

ch = 3;

format = PixelFormat.Format24bppRgb;

}

bufferSize = width * height * ch;

buffer = new byte;

if (camera.ExposureStatus == ASICameraDll.ASI_EXPOSURE_STATUS.ASI_EXP_SUCCESS)

{

IntPtr dataPtr = Marshal.AllocHGlobal(bufferSize);

camera.GetExposureData(dataPtr, bufferSize);

Marshal.Copy(dataPtr, buffer, 0, bufferSize);

image = new Bitmap(width, height, format);

BitmapData bmpData = image.LockBits(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadWrite, format);

IntPtr pNative = bmpData.Scan0;

Marshal.Copy(buffer, 0, pNative, bufferSize);

image.UnlockBits(bmpData);

var newPalette = image.Palette;

for (int index = 0; index < image.Palette.Entries.Length; ++index)

{

var entry = image.Palette.Entries;

var gray = (int)(0.30 * entry.R + 0.59 * entry.G + 0.11 * entry.B);

newPalette.Entries = Color.FromArgb(gray, gray, gray);

}

image.Palette = newPalette;

if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

pictureBox1.Image = image;

Marshal.FreeHGlobal(dataPtr);

}

camera.CloseCamera();

---------------------------

but I have wrong images as a result (find in attachment)

yang

Hi, you can try our C# demo.