Hi,
I try to develop some code in opencv in the pix_opencv's style. To
start, I tried to convert rgba to gray using opencv ( cvCvtColor(orig,
gray, CV_BGRA2GRAY); )
but I can't get a gray picture of the same size at the output. If I
just copy the gray image, I get just 4 small gray copy of the original
on one line on the top of the image.
If I try to convert from grey to rgba before to output the data, I get
a monochrome but yellow picture.
I wonder if there's a relation with the fact that I am working on a
mac, is it possible ? because of a difference coding of rgba on mac
and others?
do someone know how I can solve this?
here is the code of the one which give me a yellow monochromatic
picture:
///////////////// processImage /////////////////////////
void pix_opencv_mytest :: processRGBAImage(imageStruct &image) {
if ((this->comp_xsize!=image.xsize)||(this->comp_ysize!
=image.ysize)||(!orig)) {
this->comp_xsize = image.xsize; this->comp_ysize = image.ysize;
cvReleaseImage(&orig); cvReleaseImage(&gray);
cvReleaseImage(&bob);
//create the orig image with new size
orig = cvCreateImage(cvSize(image.xsize,image.ysize),
IPL_DEPTH_8U, 4);
gray = cvCreateImage(cvSize(orig->width,orig->height),
IPL_DEPTH_8U, 1);
}
// Here we make a copy of the pixel data from image to orig-
>imageData, orig is a IplImage struct
memcpy( orig->imageData, image.data, image.xsize*image.ysize*4 );
cvCvtColor(orig, gray, CV_BGRA2GRAY); // Convert to grayscale
cvCvtColor(gray, orig, CV_GRAY2BGRA);
//copy back the processed frame to image
memcpy( image.data, orig->imageData, image.xsize*image.ysize*4 );
}
thanks,
loic
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