I'm trying to convert BGR to YUV with `cvCvtColor` method AND then get reference to each component.
The source image (`IplImage1`) has following parameters:

1. depth = 8
2. nChannels = 3
3. colorModel = RGB
4. channelSeq = BGR
5. width = 1620
6. height = 1220

Convert and get the components after conversion:

```
IplImage* yuvImage = cvCreateImage(cvSize(1620, 1220), 8, 3);
cvCvtColor(IplImage1, yuvImage, CV_BGR2YCrCb);
yPtr = yuvImage->imageData;
uPtr = yPtr + height*width;
vPtr = uPtr + height*width/4;

```

I have method that converts the YUV back to RGB and saves to file. When I create the YUV components manually (I create blue image) it works and when I open the image it's really blue. But, when I create YUV components using the method above I get black image. I think that maybe I get reference to YUV components wrongly

```
yPtr = yuvImage->imageData;
uPtr = yPtr + height*width;
vPtr = uPtr + height*width/4;

```

What could be the problem?