Enable manual exposure and its adjustment function

Using the SetOptionValue() function of the API, you can set various control values ​​for the current open device.

To enabling manual exposure, set Option::EXPOSURE_MODE to 1.

For mynteye s1030, during manual exposure, the settings available for adjustment are:

  • Option::GAIN Gain.
  • Option::BRIGHTNESS Brightness (Exposure time).
  • Option::CONTRAST Contrast (Black level calibration).

For mynteye s210a, during manual exposure, the settings available for adjustment are:

  • Option::BRIGHTNESS Brightness (Exposure time).

Reference Code:

s1030:

auto &&api = API::Create(argc, argv);

// manual-exposure: 1
api->SetOptionValue(Option::EXPOSURE_MODE, 1);

// gain: range [0,48], default 24
api->SetOptionValue(Option::GAIN, 24);
// brightness/exposure_time: range [0,240], default 120
api->SetOptionValue(Option::BRIGHTNESS, 120);
// contrast/black_level_calibration: range [0,255], default 127
api->SetOptionValue(Option::CONTRAST, 127);

LOG(INFO) << "Enable manual-exposure";
LOG(INFO) << "Set GAIN to " << api->GetOptionValue(Option::GAIN);
LOG(INFO) << "Set BRIGHTNESS to " << api->GetOptionValue(Option::BRIGHTNESS);
LOG(INFO) << "Set CONTRAST to " << api->GetOptionValue(Option::CONTRAST);

s210a:

auto &&api = API::Create(argc, argv);

bool ok;
auto &&request = api->SelectStreamRequest(&ok);
if (!ok) return 1;
api->ConfigStreamRequest(request);

// manual-exposure: 1
api->SetOptionValue(Option::EXPOSURE_MODE, 1);

// brightness/exposure_time: range [0,240], default 120
api->SetOptionValue(Option::BRIGHTNESS, 120);

LOG(INFO) << "Enable manual-exposure";
LOG(INFO) << "Set EXPOSURE_MODE to "
          << api->GetOptionValue(Option::EXPOSURE_MODE);
LOG(INFO) << "Set BRIGHTNESS to "
          << api->GetOptionValue(Option::BRIGHTNESS);

Reference running results on Linux:

s1030:

$ ./samples/_output/bin/tutorials/ctrl_manual_exposure
I0513 14:09:17.104431 31908 utils.cc:26] Detecting MYNT EYE devices
I0513 14:09:17.501519 31908 utils.cc:33] MYNT EYE devices:
I0513 14:09:17.501551 31908 utils.cc:37]   index: 0, name: MYNT-EYE-S1000
I0513 14:09:17.501562 31908 utils.cc:43] Only one MYNT EYE device, select index: 0
I0513 14:09:17.552918 31908 manual_exposure.cc:37] Enable manual-exposure
I0513 14:09:17.552953 31908 manual_exposure.cc:38] Set GAIN to 24
I0513 14:09:17.552958 31908 manual_exposure.cc:39] Set BRIGHTNESS to 120
I0513 14:09:17.552963 31908 manual_exposure.cc:40] Set CONTRAST to 127

s210a:

$ ./samples/_output/bin/tutorials/ctrl_manual_exposure
I/utils.cc:30 Detecting MYNT EYE devices
I/utils.cc:40 MYNT EYE devices:
I/utils.cc:43   index: 0, name: MYNT-EYE-S210A, sn: 07C41A190009071F
I/utils.cc:51 Only one MYNT EYE device, select index: 0
I/utils.cc:79 MYNT EYE devices:
I/utils.cc:82   index: 0, request: width: 1280, height: 400, format: Format::BGR888, fps: 10
I/utils.cc:82   index: 1, request: width: 1280, height: 400, format: Format::BGR888, fps: 20
I/utils.cc:82   index: 2, request: width: 1280, height: 400, format: Format::BGR888, fps: 30
I/utils.cc:82   index: 3, request: width: 1280, height: 400, format: Format::BGR888, fps: 60
I/utils.cc:82   index: 4, request: width: 2560, height: 800, format: Format::BGR888, fps: 10
I/utils.cc:82   index: 5, request: width: 2560, height: 800, format: Format::BGR888, fps: 20
I/utils.cc:82   index: 6, request: width: 2560, height: 800, format: Format::BGR888, fps: 30
I/utils.cc:93 There are 7 stream requests, select index:
3
I/manual_exposure.cc:62 Enable manual-exposure
I/manual_exposure.cc:63 Set EXPOSURE_MODE to 1
I/manual_exposure.cc:65 Set BRIGHTNESS to 120

The sample program displays an image with a real exposure time in the upper left corner, in milliseconds.

Complete code samples,see manual_exposure.cc .