Get Specific depth values in Kinect (XNA)
- by N0xus
I'm currently trying to make a hand / finger tracking with a kinect in XNA. For this, I need to be able to specify the depth range I want my program to render. I've looked about, and I cannot see how this is done. As far as I can tell, kinect's depth values only work with pre-set ranged found in the depthStream.
What I would like to do is make it modular so that I can change the depth range my kinect renders. I know this has been down before but I can't find anything online that can show me how to do this.
Could someone please help me out?
I have made it possible to render the standard depth view with the kinect, and the method that I have made for converting the depth frame is as follows (I've a feeling its something in here I need to set)
private byte[] ConvertDepthFrame(short[] depthFrame, DepthImageStream depthStream, int depthFrame32Length)
{
int tooNearDepth = depthStream.TooNearDepth;
int tooFarDepth = depthStream.TooFarDepth;
int unknownDepth = depthStream.UnknownDepth;
byte[] depthFrame32 = new byte[depthFrame32Length];
for (int i16 = 0, i32 = 0; i16 < depthFrame.Length && i32 < depthFrame32.Length; i16++, i32 += 4)
{
int player = depthFrame[i16] & DepthImageFrame.PlayerIndexBitmask;
int realDepth = depthFrame[i16] >> DepthImageFrame.PlayerIndexBitmaskWidth;
// transform 13-bit depth information into an 8-bit intensity appropriate
// for display (we disregard information in most significant bit)
byte intensity = (byte)(~(realDepth >> 8));
if (player == 0 && realDepth == 00)
{
// white
depthFrame32[i32 + RedIndex] = 255;
depthFrame32[i32 + GreenIndex] = 255;
depthFrame32[i32 + BlueIndex] = 255;
}
// omitted other if statements. Simple changed the color of the pixels if they went out of the pre=set depth values
else
{
// tint the intensity by dividing by per-player values
depthFrame32[i32 + RedIndex] = (byte)(intensity >> IntensityShiftByPlayerR[player]);
depthFrame32[i32 + GreenIndex] = (byte)(intensity >> IntensityShiftByPlayerG[player]);
depthFrame32[i32 + BlueIndex] = (byte)(intensity >> IntensityShiftByPlayerB[player]);
}
}
return depthFrame32;
}
I have a strong hunch it's something I need to change in the int player and int realDepth values, but i can't be sure.
