# Working with 3D-Cameras of Automation Technology in CVB

**URL:** <https://forum.commonvisionblox.com/t/working-with-3d-cameras-of-automation-technology-in-cvb/532>\
**Category:** Programming Questions\
**Tags:** acquisition, genicam, gigevision, documentation\
**Created:** [August 23, 2018, 9:42am UTC](https://forum.commonvisionblox.com/t/working-with-3d-cameras-of-automation-technology-in-cvb/532 "2018-08-23T09:42:09Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![Moli](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.commonvisionblox.com/moli/32/553_2.png) [@Moli](https://forum.commonvisionblox.com/u/Moli)\
**Post date:** [August 27, 2018, 11:34am UTC](https://forum.commonvisionblox.com/t/working-with-3d-cameras-of-automation-technology-in-cvb/532/11 "2018-08-27T11:34:16Z")

</div>

**SPLIT DATA CHANNELS (DCs)**

With AT’s 3D cameras multiple different image data can be obtained and transmitted to the host. This can be either images including the range information, intensity information or laser thickness information. All output channels can be selected individually and in combinations. Every DC is saved in a new image row, resulting in multi information images which must be split on the host side afterwards if multiple DCs are enabled.

For detailed information regarding the data channel assignment DC0-DC2 please take a look into the manufacturer’s sensor manual.

The following two functions demonstrate an example way (C#) to split an image consisting of multiple DCs into its sub-images, depending on its bit depth.

> **Split 8Bit Image**
>
> ```auto
> private static Boolean Split8BitImage(Cvb.Image.IMG cameraImg, ref Cvb.Image.IMG[] singleImages)
> {
> // Define variables
> int numSingleImages = singleImages.GetLength(0);
> IntPtr baseIn;
> int xIncIn, yIncIn;
> int imageWidth, imageHeight;
> 
> imageWidth = Cvb.Image.ImageWidth(cameraImg);
> imageHeight = Cvb.Image.ImageHeight(cameraImg);
> 
> // Images might not have a multiple of lines of the requested images
> if (imageHeight % numSingleImages != 0)
> imageHeight = imageHeight / numSingleImages;
> 
> // Get linear access to the base image
> Cvb.Utilities.GetLinearAccess(cameraImg, 0, out baseIn, out xIncIn, out yIncIn);
> 
> // Init a pointer array for every image
> IntPtr[] baseOut = new IntPtr[numSingleImages];
> 
> // Prepare variables
> int xIncOut, yIncOut;
> xIncOut = yIncOut = 0;
> 
> // Create the images and get access
> for (int i = 0; i < numSingleImages; i++)
> {
> // 8 bit images
> Cvb.Image.CreateGenericImageDT(1, imageWidth, imageHeight / numSingleImages, 8, out singleImages[i]);
> Cvb.Utilities.GetLinearAccess(singleImages[i], 0, out baseOut[i], out xIncOut, out yIncOut);
> }
> 
> // split data
> unsafe
> {
> char* grayval;
> char* pixel;
> 
> for (int y = 0; y < imageHeight; y++)
> {
> for (int x = 0; x < imageWidth; x++)
> {
> grayval = (char*)((int)baseIn + x * xIncIn + y * yIncIn);
> // Assign correct address to pixel
> pixel = (char*)((int)baseOut[y % numSingleImages] + x * xIncOut + (y / numSingleImages) * yIncOut);
> // Write value of grayval to pixel address
> *((char*)pixel) = (char)*grayval;
> }
> }
> }
> return true;
> }
> 
> ```

> **Split 16Bit Image**
>
> ```auto
> private static Boolean Split16BitImage(Cvb.Image.IMG cameraImg, ref Cvb.Image.IMG[] singleImages)
> {      
> // Define variables
> int numSingleImages = singleImages.GetLength(0);
> IntPtr baseIn;
> int xIncIn, yIncIn;
> int imageWidth, imageHeight;
> 
> imageWidth = Cvb.Image.ImageWidth(cameraImg);
> imageHeight = Cvb.Image.ImageHeight(cameraImg);
>   
> // Images might not have a multiple of lines of the requested images
> if (imageHeight % numSingleImages != 0)
> imageHeight = imageHeight / numSingleImages;
> 
> // Get linear access to the base image
> Cvb.Utilities.GetLinearAccess(cameraImg, 0, out baseIn, out xIncIn, out yIncIn);
> 
> // Init a pointer array for every image
> IntPtr[] baseOut = new IntPtr[numSingleImages];
> 
> // Prepare variables
> int xIncOut, yIncOut;
> xIncOut = yIncOut = 0;
> 
> // Create the images and get access
> for (int i = 0; i < numSingleImages; i++)
> {
> // For 16 bit images
> Cvb.Image.CreateGenericImageDT(1, imageWidth, imageHeight / numSingleImages, 16, out singleImages[i]);
> Cvb.Utilities.GetLinearAccess(singleImages[i], 0, out baseOut[i], out xIncOut, out yIncOut);
> }
> 
> // split data
> unsafe
> {
> // For 16 bit images
> ushort* grayval;
> ushort* pixel;
> 
> for (int y = 0; y < imageHeight; y++)
> {
> for (int x = 0; x < imageWidth; x++)
> {
> // grayval is the address of the pixel holding the value we want to access
> grayval = (ushort*)((int)baseIn + x * xIncIn + y * yIncIn);
> // Assign correct address to pixel
> pixel = (ushort*)((int)baseOut[y % numSingleImages] + x * xIncOut + (y / numSingleImages) * yIncOut);
> // Write value of grayval to pixel address
> *((ushort*)pixel) = (ushort)*grayval;
> }
> }
> }
> return true;
> }
> 
> ```

Please notice, that these functions require previous knowledge about the selected number of DCs. This information can be determined by a GenICam query on the value of the specific features (EnableDC0-DC2).

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