无法在C ++中获取Color框架 [英] Unable to get Color frame in C++

问题描述

Hi Folks，

我正在尝试编写一个非常简单的C ++应用程序，通过轮询从Kinect摄像头获取彩色图像。  我有以下代码：

 

 
 #include< Windows.h> 
 #include " MSR_NuiApi.h"  
 
 #include< iostream> 
 
 
  int  main（）
 {
  static   const   int  WAIT_TIME = 100; 
 
  static   const   int  NUM_FRAMES = 2; 
 
 DWORD kflags = NUI_INITIALIZE_FLAG_USES_COLOR; 
 
 HRESULT init = NuiInitialize（kflags）; 
  if （FAILED（init））
 {
 std :: cout<< "Kinect初始化失败。"<<的std :: ENDL; 
  return  -1; 
} 
 
 HANDLE colorImageStream; 
 HRESULT streamColorOpen = NuiImageStreamOpen（
 NUI_IMAGE_TYPE_COLOR，
 NUI_IMAGE_RESOLUTION_640x480，
 0，
 NUM_FRAMES，
 INVALID_HANDLE_VALUE，
& colorImageStream 
 ）; 
 
  if （FAILED（streamColorOpen））
 {
 std :: cout<< "无法打开颜色流。"<<的std :: ENDL; 
  return  -1; 
} 
 
  const  NUI_IMAGE_FRAME * colorFrame = NULL; 
 HRESULT color = NuiImageStreamGetNextFrame（
 colorImageStream，
 WAIT_TIME，
& colorFrame 
）; 
 
  if （FAILED（color））
 {
 std :: cout<< "无法获取彩色框架。"<<的std :: ENDL; 
  return  -1; 
} 
 
 NuiImageStreamReleaseFrame（colorImageStream，colorFrame）; 
 
 NuiShutdown（）; 
  return  0; 
} 
 

解决方案

即使你将WAIT_TIME增加到更大，会发生这种情况吗？平均而言，帧之间需要大约30ms，但第一帧可能需要更长的时间才能到达。出于测试目的，尝试10秒等待，然后
让我们知道这是否也不起作用。

等待时间越短也应该工作，但是你需要只处理E_NUI_FRAME_NO_DATA作为预期的可能失败，并在这种情况下再次循环以尝试再次获取数据，如果您正在进行轮询。

Eddy

Hi Folks,

I am trying to write a very simple C++ app with polling to get color images from the Kinect camera.  I have the following code:

 

#include <Windows.h>
#include "MSR_NuiApi.h"

#include <iostream>


int main()
{
	static const int WAIT_TIME = 100;

	static const int NUM_FRAMES = 2;

	DWORD kflags = NUI_INITIALIZE_FLAG_USES_COLOR;

	HRESULT init = NuiInitialize(kflags);
	if (FAILED(init))
	{
		std::cout << "Kinect initialization failed." << std::endl;
		return -1;
	}

	HANDLE colorImageStream;
	HRESULT streamColorOpen = NuiImageStreamOpen(
		NUI_IMAGE_TYPE_COLOR,
		NUI_IMAGE_RESOLUTION_640x480,
		0,
		NUM_FRAMES,
		INVALID_HANDLE_VALUE,
		&colorImageStream
	);

	if (FAILED(streamColorOpen))
	{
		std::cout << "Unable to open color stream." << std::endl;
		return -1;
	}

	const NUI_IMAGE_FRAME * colorFrame = NULL;
	HRESULT color = NuiImageStreamGetNextFrame(
		colorImageStream,
		WAIT_TIME,
		&colorFrame
	);

	if (FAILED(color))
	{
		std::cout << "Unable to get Color frame." << std::endl;
		return -1;
	}
	
	NuiImageStreamReleaseFrame(colorImageStream, colorFrame);

	NuiShutdown();
	return 0;
}

解决方案

Does this happen even if you increase your WAIT_TIME to be bigger? In average, it should take approximately 30ms between frames, but the first frame might take a little longer to arrive. For testing purposes, try something like a 10 second wait, and then let us know if that doesn't work either.

Having the shorter wait should work too, but you need to just handle E_NUI_FRAME_NO_DATA as an expected possible failure and just loop again to try to get data again in that case, if you're doing polling.

Eddy

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