IplImage轉爲wxImage出現問題

下面是轉換時用到的函數

#ifndef IPLTOWXIMAGE_H
#define IPLTOWXIMAGE_H

#include "cv.h"
#include "highgui.h"

void copy_and_swap_rb(char *s, char *d, int size)
{
	// Copy image data source s to destination d, swapping R and B channels.
	// Assumes 8 bit depth, 3 interleaved channels, and width_step = width*3
	const int step = 3;
	char *end = s + size;
	while (s<end) {
		d[0] = s[2];
		d[1] = s[1];
		d[2] = s[0];
		d += step;
		s += step;
	}
}

void wx2cv(wxImage &wx, IplImage *ipl)
{
	// Copy image data from wxWidgets image to Ipl (opencv) image
	// Assumes ipl image has seq "GBR", depth 8, and 3 channels, and
	// has the same size as the wxImage, and width_step = width*3.
	copy_and_swap_rb((char*)wx.GetData(), ipl->imageData, ipl->imageSize);
}

void cv2wx(IplImage *ipl, wxImage &wx )
{
	// Copy image data from Ipl (opencv) image to wxImage
	// Assumes ipl image has seq "GBR", depth 8, and 3 channels, and
	// has the same size as the wxImage, and width_step = width*3.
	copy_and_swap_rb( ipl->imageData, (char*)wx.GetData(),
		wx.GetWidth()*wx.GetHeight()*3);
}

IplImage *cv_from_wx(wxImage &wx)
{
	// Return a new IplImage copied from a wxImage.
	// Must be freed by user with cvReleaseImage().
	IplImage *ret = cvCreateImage(cvSize(wx.GetWidth(), wx.GetHeight()),
		IPL_DEPTH_8U, 3);
	wx2cv(wx, ret);
	return ret;
}

wxImage wx_from_cv( IplImage *cx)
{
	// Return new wxImage copied from a compatible IplImage.
	// Assumes ipl image has seq "BGR", depth 8, and 3 channels
	// Fear not. The copy on return is cheap; does not deep-copy the data.
	wxImage wx(cx->width, cx->height, (unsigned char*) malloc(cx->imageSize), false);//RGB
	cv2wx(cx, wx);
	return wx;
}
#endif

將IplImage轉換爲wxImage時，有時候會出現將彩色圖像變爲黑白的圖像，圖像出現問題
不知道是wx_from_cv這個方法的問題還是什麼問題


採取了另外一種解決方法
將IplImage保存爲一個實時圖片文件，再去讀取這個臨時文件解決