Save picture captured by the camera on SD-Card

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1

Hi,

I’m trying to save the picture captured by the camera on the SD card and cannot convert the GT.Picture picture into byte:
My code:
[

private void camera_pictureCaptured(Camera sender, GT.Picture picture)
        {
           
            GT.StorageDevice storage = sdCard.GetStorageDevice();
            //save captured picture on SD card
// Picture_Captured  global defined. Here byte is required. How to convert GT.Picture in bye?
            Picture_Captured = new Bitmap(picture, Bitmap.BitmapImageType.Bmp);
            // allocate buffer
           byte[] outputFile = new byte[Picture_Captured.Width * Picture_Captured.Height * 3 + 54];  //* 3 + 54 (3 colors)
            // convert to BMP file
            Util.BitmapToBMPFile(Picture_Captured.GetBitmap(), Picture_Captured.Width, Picture_Captured.Height, outputFile);

            string pathFileName = "\\SD\\picture_captured.bmp";
            try
            {
                File.WriteAllBytes(pathFileName, outputFile);
                Debug.Print("Saved picture_captured.bmp to file: " + pathFileName);
            }
            catch (Exception ex)
            {
                Debug.Print("Message: " + ex.Message + "  Inner Exception: " + ex.InnerException);
            }
        }
2

I found it out:

3

Hi,

that does not work. I think the reason is that I can’t get the captured picture.


new Bitmap(camera.CurrentPictureResolution.Width, camera.CurrentPictureResolution.Height)

Does somebody a propose?

4

I don’t get a syntax error but the image is always black.

5

I assume you are trying to open the file on a pc?
i’d take a step back. can you capture and display a picture successfully? if so, then write to file, and reopen on fez (not pc). if that works, its the file format you need to look at…

6

How many colors do you have per pixel?
If I remember right, then bmp’s with 256 colors are always saved using a palette (table with color value for each pixel value (0-255).
May be it’s just a bad palette.

7

camera.CurrentPictureResolution.Width returns the width of the picture but I want to get the picture. I used the method makeBitmap() of GT.picture (the captured picture by the camera) and so solved this issue.

8

Hi SB,

I tried following code below and I noticed that you do not need to do all this work around.

follows:


private void camera_PictureCaptured(Camera sender, GT.Picture picture)
{
	/////////////////////////
	//First try - Does OK
	Bitmap image = new Bitmap(320, 240);
	image.DrawRectangle(Colors.Blue, 1, 0, 0, 320, 240, 0, 0, Colors.Blue, 0, 0, Colors.Blue, 0, 0, Bitmap.OpacityOpaque);
	image.DrawLine(Colors.Orange, 1, 0, 0, 320 - 1, 0);
	image.DrawLine(Colors.Red, 1, 0, 0, 0, 240 - 1);
	image.DrawLine(Colors.Yellow, 1, 320 - 1, 240 - 1, 0, 240 - 1);
	image.DrawLine(Colors.Magenta, 1, 320 - 1, 240 - 1, 320 - 1, 0);
	image.DrawEllipse(Colors.Red, 320 / 2, 240 / 2, 50, 50);

	byte[] outputFile = new byte[image.Width * image.Height * 3 + 54];

	Util.BitmapToBMPFile(image.GetBitmap(), image.Width, image.Height, outputFile);

	File.WriteAllBytes("\\SD\\CreatedBMPFile.bmp", outputFile);

	/////////////////////////
	//Second try - Does OK too
	display_T35.SimpleGraphics.DisplayImage(picture, 5, 5);

	string fileName = "DSC_" + DateTime.Now.Ticks.ToString();
	string pathFileName = "\\SD\\" + fileName + ".bmp";

	Bitmap Picture_Captured = picture.MakeBitmap();            
	byte[] imageByte = picture.PictureData;
	//byte[] imageByte = new byte[Picture_Captured.Width * Picture_Captured.Height * 3 + 54];
	//Util.BitmapToBMPFile(Picture_Captured.GetBitmap(), Picture_Captured.Width, Picture_Captured.Height, imageByte);

	try
	{
		File.WriteAllBytes(pathFileName, picture.PictureData);
		Debug.Print("Saved file to: " + pathFileName);
	}
	catch (Exception ex)
	{
		Debug.Print("Message: " + ex.Message + "  Inner Exception: " + ex.InnerException);
	}
}

Now I’m trying to convert it to other image format like JPG eg.

Regards,
Andrw Paes

1 Like
9

Seems like a lot of work going on here and while I don’t frame my pictures I have this running right now on a project (uses the Raptor mainboard).


        private void camera_PictureCaptured(Camera sender, GT.Picture picture)
        {
            _picture = picture;

            //sets the background of the touch display using Glide
            window.BackImage = picture.MakeBitmap();
            window.Invalidate();

            if (sdCard.IsCardMounted)
            {
                DateTime now = DateTime.Now;

                string filename = DateTime.Now.ToString("yyyy-MMdd-HH-mm") + ".jpg";
                try
                {
                    sdCard.GetStorageDevice().WriteFile(filename, picture.PictureData);
                }
                catch (Exception ex)
                {

                    Debug.Print("Message: " + ex.Message + "  Inner Exception: " + ex.InnerException);
                }
            }
        }