I am facing the same problem (“junk” in the right hand corner) with HD1 as you but with openCV(C++) instead of picamera. I know that this is because PiCapture HD1 expects “mode 5” (1296×730–720p) which is obviously not the mode that openCV is using for capturing. This is not a problem with picamera as there is an option of sensor_mode available in picamera but I cannot figure out a similar option in openCV. Do you know how to select “mode” in openCV? I have tried CV_CAP_PROP_MODE but it changes the color space instead of resolution.