Revision history [back]

sensor_msgs::image_encodings::TYPE_8UC3 is not a color format, it is a data type with 3 channels of 8 bits each (but with no information of what each channel mean), so cv_bridge::toCvCopy doesn't know who to transform from bayer_rggb8 color format.

I assume that what you really want is to transform the original image received in bayer_rggb8 format to the more commonly used BGR8 format.

In that case try the following:

 imgTmp = cv_bridge::toCvCopy(msg, sensor_msgs::image_encodings::BGR8);

Now, BGR8 is a color format, it also has 3 channels of 8 bits each, but now you know that the first channel corresponds to Blue, the second corresponds to Green and the third corresponds to Red.

sensor_msgs::image_encodings::TYPE_8UC3 is not a color format, it is a data type with 3 channels of 8 bits each (but with no information of what each channel mean), so cv_bridge::toCvCopy doesn't know who to transform from bayer_rggb8 color format.

I assume that what you really want is to transform the original image received in bayer_rggb8 format to the more commonly used BGR8 format.

In that case try the following:

 imgTmp = cv_bridge::toCvCopy(msg, sensor_msgs::image_encodings::BGR8);

Now, BGR8 is a color format, it also has 3 channels of 8 bits each, but now you know that the first channel corresponds to Blue, the second corresponds to Green and the third corresponds to Red.