我想在qt窗口中显示图像，所以我使用了Qlabel->setpixmap
但是我如何从IPImage转换为QImage以在标签中显示它？？
我找到了下面的函数来转换它，但我不知道如何在调用语句中使用它
QImage *IplImageToQImage(const IplImage * iplImage, uchar **data, double mini, double maxi)
{
uchar *qImageBuffer = NULL;
int width = iplImage->width;
int widthStep = iplImage->widthStep;
int height = iplImage->height;
switch (iplImage->depth)
{
case IPL_DEPTH_8U:
if (iplImage->nChannels == 1)
{
// OpenCV image is stored with one byte grey pixel. We convert it
// to an 8 bit depth QImage.
//
qImageBuffer = (uchar *) malloc(width*height*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
const uchar *iplImagePtr = (const uchar *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
// Copy line by line
memcpy(QImagePtr, iplImagePtr, width);
QImagePtr += width;
iplImagePtr += widthStep;
}
}
else if (iplImage->nChannels == 3)
{
/* OpenCV image is stored with 3 byte color pixels (3 channels).
We convert it to a 32 bit depth QImage.
*/
qImageBuffer = (uchar *) malloc(width*height*4*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
const uchar *iplImagePtr = (const uchar *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// We cannot help but copy manually.
QImagePtr[0] = iplImagePtr[0];
QImagePtr[1] = iplImagePtr[1];
QImagePtr[2] = iplImagePtr[2];
QImagePtr[3] = 0;
QImagePtr += 4;
iplImagePtr += 3;
}
iplImagePtr += widthStep-3*width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=8U and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_16U:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with 2 bytes grey pixel. We convert it
to an 8 bit depth QImage.
*/
qImageBuffer = (uchar *) malloc(width*height*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
//const uint16_t *iplImagePtr = (const uint16_t *);
const unsigned int *iplImagePtr = (const unsigned int *)iplImage->imageData;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// We take only the highest part of the 16 bit value. It is
//similar to dividing by 256.
*QImagePtr++ = ((*iplImagePtr++) >> 8);
}
iplImagePtr += widthStep/sizeof(unsigned int)-width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=16U and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_32F:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with float (4 bytes) grey pixel. We
convert it to an 8 bit depth QImage.
*/
qImageBuffer = (uchar *) malloc(width*height*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
const float *iplImagePtr = (const float *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
uchar p;
float pf = 255 * ((*iplImagePtr++) - mini) / (maxi - mini);
if (pf < 0) p = 0;
else if (pf > 255) p = 255;
else p = (uchar) pf;
*QImagePtr++ = p;
}
iplImagePtr += widthStep/sizeof(float)-width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=32F and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_64F:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with double (8 bytes) grey pixel. We
convert it to an 8 bit depth QImage.
*/
qImageBuffer = (uchar *) malloc(width*height*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
const double *iplImagePtr = (const double *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
uchar p;
double pf = 255 * ((*iplImagePtr++) - mini) / (maxi - mini);
if (pf < 0) p = 0;
else if (pf > 255) p = 255;
else p = (uchar) pf;
*QImagePtr++ = p;
}
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=64F and %d channelsn", iplImage->nChannels);
}
break;
default:
qDebug("IplImageToQImage: image format is not supported : depth=%d and %d channelsn", iplImage->depth, iplImage->nChannels);
}
QImage *qImage;
QVector<QRgb> vcolorTable;
if (iplImage->nChannels == 1)
{
// We should check who is going to destroy this allocation.
QRgb *colorTable = new QRgb[256];
for (int i = 0; i < 256; i++)
{
colorTable[i] = qRgb(i, i, i);
vcolorTable[i] = colorTable[i];
}
qImage = new QImage(qImageBuffer, width, height, QImage::Format_Indexed8);
qImage->setColorTable(vcolorTable);
}
else
{
qImage = new QImage(qImageBuffer, width, height, QImage::Format_RGB32);
}
*data = qImageBuffer;
return qImage;
}
参数为：const-IplImage*IplImage，uchar**数据，双迷你，双最大
什么是数据，迷你，最大？我如何从我的IPLPImage中获得它，以便在呼叫语句中使用它？
谢谢：）
代码似乎未使用data，而mini和maxi用于将某些图像格式使用的浮点值转换为0-255范围内的整数值。
我会尝试使用NULL作为数据。mini和maxi确实取决于图像数据，我不知道什么是合理的范围。但是，如果您的IplImage没有作为浮点值存储，那么这些值应该不会有任何区别。
您可以使用QImage（数据、宽度、高度、格式）简单地创建一个QImage，其中数据由其他东西（如IPLImage）所有，并且只要QImage和IPLImage（如RGB888=8U_C3）中的格式相同，数据就是IPLImage数据ptr
我在代码中发现了一些错误。。。。也许它还有更多的错误，但目前对我来说还不错。带有Format_Index8的QImage有时需要（取决于图像分辨率……）在右侧添加2字节（不知道为什么，但看起来是这样）。这是新的改编代码
QImage *IplImageToQImage(const IplImage * iplImage, uchar **data, double mini, double maxi)
{
uchar *qImageBuffer = NULL;
int width = iplImage->width;
int widthStep = iplImage->widthStep;
int height = iplImage->height;
QImage *qImage;
switch (iplImage->depth)
{
case IPL_DEPTH_8U:
if (iplImage->nChannels == 1)
{
// OpenCV image is stored with one byte grey pixel. We convert it
// to an 8 bit depth QImage.
qImage = new QImage(width,height,QImage::Format_Indexed8);
uchar *QImagePtr = qImage->scanLine(0);
qImageBuffer = qImage->scanLine(0);
const uchar *iplImagePtr = (const uchar *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
// Copy line by line
QImagePtr = qImage->scanLine(y);
memcpy(QImagePtr, iplImagePtr, width);
iplImagePtr += widthStep;
}
/*
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// We take only the highest part of the 16 bit value. It is
//similar to dividing by 256.
//*QImagePtr++ = ((*iplImagePtr++) >> 8);
*QImagePtr = *iplImagePtr;
QImagePtr++;
iplImagePtr++;
}
iplImagePtr += widthStep/sizeof(uchar)-width;
}*/
}
else if (iplImage->nChannels == 3)
{
/* OpenCV image is stored with 3 byte color pixels (3 channels).
We convert it to a 32 bit depth QImage.
*/
qImageBuffer = (uchar *) malloc(width*height*4*sizeof(uchar));
uchar *QImagePtr = qImageBuffer;
const uchar *iplImagePtr = (const uchar *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
// We cannot help but copy manually.
QImagePtr[0] = iplImagePtr[0];
QImagePtr[1] = iplImagePtr[1];
QImagePtr[2] = iplImagePtr[2];
QImagePtr[3] = 0;
QImagePtr += 4;
iplImagePtr += 3;
}
iplImagePtr += widthStep-3*width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=8U and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_16U:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with 2 bytes grey pixel. We convert it
to an 8 bit depth QImage.
*/
qImage = new QImage(width,height,QImage::Format_Indexed8);
uchar *QImagePtr = qImage->scanLine(0);
qImageBuffer = qImage->scanLine(0);
//const uint16_t *iplImagePtr = (const uint16_t *);
const unsigned short *iplImagePtr = (const unsigned short *)iplImage->imageData;
for (int y = 0; y < height; y++)
{
QImagePtr = qImage->scanLine(y);
for (int x = 0; x < width; x++)
{
// We take only the highest part of the 16 bit value. It is
//similar to dividing by 256.
//*QImagePtr++ = ((*iplImagePtr++) >> 8);
//change here 16 bit could be everything !! set max min to your desire
*QImagePtr = 255*(((*iplImagePtr) - mini) / (maxi - mini));
QImagePtr++;
iplImagePtr++;
}
iplImagePtr += widthStep/sizeof(unsigned short)-width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=16U and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_32F:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with float (4 bytes) grey pixel. We
convert it to an 8 bit depth QImage.
*/
qImage = new QImage(width,height,QImage::Format_Indexed8);
uchar *QImagePtr = qImage->scanLine(0);
qImageBuffer = qImage->scanLine(0);
const float *iplImagePtr = (const float *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
QImagePtr = qImage->scanLine(y);
for (int x = 0; x < width; x++)
{
uchar p;
float pf = 255 * ((*iplImagePtr++) - mini) / (maxi - mini);
if (pf < 0) p = 0;
else if (pf > 255) p = 255;
else p = (uchar) pf;
*QImagePtr++ = p;
}
iplImagePtr += widthStep/sizeof(float)-width;
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=32F and %d channelsn", iplImage->nChannels);
}
break;
case IPL_DEPTH_64F:
if (iplImage->nChannels == 1)
{
/* OpenCV image is stored with double (8 bytes) grey pixel. We
convert it to an 8 bit depth QImage.
*/
qImage = new QImage(width,height,QImage::Format_Indexed8);
uchar *QImagePtr = qImage->scanLine(0);
qImageBuffer = qImage->scanLine(0);
const double *iplImagePtr = (const double *) iplImage->imageData;
for (int y = 0; y < height; y++)
{
QImagePtr = qImage->scanLine(y);
for (int x = 0; x < width; x++)
{
uchar p;
double pf = 255 * ((*iplImagePtr++) - mini) / (maxi - mini);
if (pf < 0) p = 0;
else if (pf > 255) p = 255;
else p = (uchar) pf;
*QImagePtr++ = p;
}
}
}
else
{
qDebug("IplImageToQImage: image format is not supported : depth=64F and %d channelsn", iplImage->nChannels);
}
break;
default:
qDebug("IplImageToQImage: image format is not supported : depth=%d and %d channelsn", iplImage->depth, iplImage->nChannels);
}
QVector<QRgb> vcolorTable;
if (iplImage->nChannels == 1)
{
// We should check who is going to destroy this allocation.
vcolorTable.resize(256);
for (int i = 0; i < 256; i++)
{
vcolorTable[i] = qRgb(i, i, i);
}
//Qt vector is difficult to use... start with std to qvector
//here I allocate QImage using qt constructor (Forma_Indexed8 adds sometimes 2 bytes on the right side !!! o.O not specified nowhere !!!)
//qImage = new QImage(tmpImg->scanLine(0), width, height, QImage::Format_Indexed8);
qImage->setColorTable(vcolorTable);
}
else
{
qImage = new QImage(qImageBuffer, width, height, QImage::Format_RGB32);
}
*data = qImageBuffer;
return qImage;
}
我不知道3个通道是否也有相同的错误，但我希望不是