Convert format by mainipulating pixels

samples/device/camera.cc

@@ -121,8 +121,6 @@ int main(int argc, char *argv[]) {
       cv::Mat right_img(
           right_data.frame->height(), right_data.frame->width(), CV_8UC3,
           right_data.frame->data());
-      cv::cvtColor(left_img, left_img, CV_BGR2RGB);
-      cv::cvtColor(right_img, right_img, CV_BGR2RGB);
       cv::hconcat(left_img, right_img, img);
     } else {
       return -1;

samples/uvc/camera.cc

@@ -144,7 +144,6 @@ int main(int argc, char *argv[]) {
 
     // only lastest frame is valid
     cv::Mat img(400, 1280, CV_8UC3, const_cast<void *>(frame->data));
-    cv::cvtColor(img, img, CV_BGR2RGB);
     cv::imshow("frame", img);
 
     frame = nullptr;