How to render 16 bits volume image

Byte-Welt - Projekte / Projects JCuda
1

Hello,
I’m a beginner in Jcuda.I look at Code sample “JCudaDriverTextureSample.java” and try to render 8 bits volume image,It work fine.But when i use input as 16 bits images ,It doesn’t work.
Is there any way to modify “JCudaDriverTextureSample.java” for render 16 bits volume image?

2

Hello

Certainly, there is. But most likely it’s not a simple single-line modification. (BTW: This sample has basically been created by porting the NVIDIA sample to JCuda, so I’m not perfectyl aware of every detail in there…)

Some basic elements of such a conversion would be (off the top of my head, there may be further details)

  • The “private byte h_volume[];” will have to be of type “short”
  • Accordingly, the srcPitch and srcHeight of the “CUDA_MEMCPY3D copy” will have to be adjusted
  • The format of the CUDA_ARRAY3D_DESCRIPTOR has to be CU_AD_FORMAT_UNSIGNED_INT16
  • The kernel will have to be adjusted, for example, the texture reference will no longer be a “texture<uchar…” but a “texture<ushort…” or so

Of course, it would be desirable to have a more “generic” application that can work with 8- or 16 bit data, but still, this is just a small sample to show the capabilities of CUDA/JCuda, and it is NOT a “real” application. (Although, one of the many, many projects that I once intended to start was “JCVR”, a more generic “Java Cuda Volume Renderer”, based on this example - but I didn’t get far with that …)

bye
Marco