In c++ , how do I set Brightness on the RBG camera? This is my code, but I have not found a way to try to get the right name of the device.

[MLars14]

I want to get the brigtness and also set the brightness

#include <librealsense2/rs.hpp>

// include OpenCV header file

#include <opencv2/opencv.hpp>

using namespace std;

using namespace cv;

const int D435RGB_WIDTH = 640;

const int D435RGB_HEIGHT = 480;

const int DEPTH_WIDTH = 640;

const int DEPTH_HEIGHT = 480;

int main()

{

  //Contruct a pipeline which abstracts the device

  rs2::pipeline pipe;

  //Create a configuration for configuring the pipeline with a non default profile

  rs2::config cfg;

  rs2::sensor ss;

  cfg.enable_stream(RS2_STREAM_COLOR, D435RGB_WIDTH, D435RGB_HEIGHT, RS2_FORMAT_BGR8, 30); // RGB

  cfg.enable_stream(RS2_STREAM_DEPTH, DEPTH_WIDTH, DEPTH_HEIGHT, RS2_FORMAT_Z16, 30); // Depth

  rs2::pipeline_profile selection = pipe.start();

  rs2::device selected_device = selection.get_device();

  auto depth_sensor = selected_device.first<rs2::depth_sensor>();

  // auto depth_sensor = selected_device.first();

 //  auto depth_sensor = selected_device.second<rs2::depth_sensor>();

//  auto depth_sensor = selected_device.first<rs2::color_camera>();

  int o = depth_sensor.get_option(RS2_OPTION_BRIGHTNESS);

  //int i =  ss.get_option(rs2_option::RS2_OPTION_BRIGHTNESS);

    int i = 1000;

 //  rs2_set_option((const rs2_options*)sen, RS2_OPTION_BRIGHTNESS,i);

  //Add desired streams to configuration

  cfg.enable_stream(RS2_STREAM_COLOR, 640, 480, RS2_FORMAT_BGR8, 30);

  //Instruct pipeline to start streaming with the requested configuration

  pipe.start(cfg);

  rs2::frameset frames;

  for(int i = 0; i < 30; i++)

  {

    //Wait for all configured streams to produce a frame

    frames = pipe.wait_for_frames();

  }

  //Get each frame

  rs2::frame color_frame = frames.get_color_frame();

  // Creating OpenCV Matrix from a color image

  Mat color(Size(640, 480), CV_8UC3, (void*)color_frame.get_data(), Mat::AUTO_STEP);

  // Display in a GUI

  namedWindow("Display Image", WINDOW_AUTOSIZE );

  imshow("Display Image", color);

  waitKey(0);

  return 0;

}

[MartyG]

I believe the means of getting the color sensor brightness value from the RGB sensor is to read it from the frame metadata using the instruction RS2_FRAME_METADATA_BRIGHTNESS

There are practically no references for using this instruction though, except in the SDK file called frame.h 0n line 49.

https://github.com/IntelRealSense/librealsense/blob/master/include/librealsense2/h/rs_frame.h#L49

In another case where someone wanted to change the brightness of the color image, Dorodnic the RealSense SDK Manager told them that "you can control exposure, gain, brightness and contrast via set_option API".

The scripting in the links below may be of use to you in working out how to use set_option to set brightness.

https://github.com/IntelRealSense/librealsense/issues/1542#issuecomment-381363473

https://github.com/IntelRealSense/librealsense/issues/2199#issuecomment-410650972