130 lines
5.0 KiB
ReStructuredText
130 lines
5.0 KiB
ReStructuredText
.. _auto_exposure:
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Enable auto exposure and its adjustment function
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=================================================
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Using the ``SetOptionValue()`` function of the API, you can set various control values of the current open device.
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To enable auto exposure, set ``Option::EXPOSURE_MODE`` to ``0`` .
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For mynteye s1030, the settings available for adjustment during auto exposure are:
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* ``Option::MAX_GAIN`` Maximum gain.
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* ``Option::MAX_EXPOSURE_TIME`` Maximum exposure time.
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* ``Option::DESIRED_BRIGHTNESS`` Expected brightness.
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For mynteye s2100/s210a, the settings available for adjustment during auto exposure are:
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* ``Option::MAX_GAIN`` Maximum gain.
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* ``Option::MAX_EXPOSURE_TIME`` Maximum exposure time.
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* ``Option::DESIRED_BRIGHTNESS`` Expected brightness.
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* ``Option::MIN_EXPOSURE_TIME`` Minimum exposure time.
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Reference Code:
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s1030：
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.. code-block:: c++
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auto &&api = API::Create(argc, argv);
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// auto-exposure: 0
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api->SetOptionValue(Option::EXPOSURE_MODE, 0);
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// max_gain: range [0,48], default 48
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api->SetOptionValue(Option::MAX_GAIN, 48);
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// max_exposure_time: range [0,240], default 240
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api->SetOptionValue(Option::MAX_EXPOSURE_TIME, 240);
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// desired_brightness: range [0,255], default 192
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api->SetOptionValue(Option::DESIRED_BRIGHTNESS, 192);
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LOG(INFO) << "Enable auto-exposure";
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LOG(INFO) << "Set MAX_GAIN to " << api->GetOptionValue(Option::MAX_GAIN);
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LOG(INFO) << "Set MAX_EXPOSURE_TIME to "
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<< api->GetOptionValue(Option::MAX_EXPOSURE_TIME);
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LOG(INFO) << "Set DESIRED_BRIGHTNESS to "
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<< api->GetOptionValue(Option::DESIRED_BRIGHTNESS);
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s2100/s210a：
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.. code-block:: c++
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auto &&api = API::Create(argc, argv);
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bool ok;
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auto &&request = api->SelectStreamRequest(&ok);
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if (!ok) return 1;
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api->ConfigStreamRequest(request);
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// auto-exposure: 0
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api->SetOptionValue(Option::EXPOSURE_MODE, 0);
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// max_gain: range [0,255], default 8
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api->SetOptionValue(Option::MAX_GAIN, 8);
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// max_exposure_time: range [0,1000], default 333
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api->SetOptionValue(Option::MAX_EXPOSURE_TIME, 333);
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// desired_brightness: range [1,255], default 122
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api->SetOptionValue(Option::DESIRED_BRIGHTNESS, 122);
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// min_exposure_time: range [0,1000], default 0
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api->SetOptionValue(Option::MIN_EXPOSURE_TIME, 0);
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LOG(INFO) << "Enable auto-exposure";
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LOG(INFO) << "Set EXPOSURE_MODE to "
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<< api->GetOptionValue(Option::EXPOSURE_MODE);
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LOG(INFO) << "Set MAX_GAIN to " << api->GetOptionValue(Option::MAX_GAIN);
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LOG(INFO) << "Set MAX_EXPOSURE_TIME to "
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<< api->GetOptionValue(Option::MAX_EXPOSURE_TIME);
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LOG(INFO) << "Set DESIRED_BRIGHTNESS to "
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<< api->GetOptionValue(Option::DESIRED_BRIGHTNESS);
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LOG(INFO) << "Set MIN_EXPOSURE_TIME to "
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<< api->GetOptionValue(Option::MIN_EXPOSURE_TIME);
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Reference running results on Linux:
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s1030：
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.. code-block:: bash
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$ ./samples/_output/bin/tutorials/ctrl_auto_exposure
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I0513 14:07:57.963943 31845 utils.cc:26] Detecting MYNT EYE devices
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I0513 14:07:58.457536 31845 utils.cc:33] MYNT EYE devices:
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I0513 14:07:58.457563 31845 utils.cc:37] index: 0, name: MYNT-EYE-S1000
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I0513 14:07:58.457567 31845 utils.cc:43] Only one MYNT EYE device, select index: 0
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I0513 14:07:58.474916 31845 auto_exposure.cc:37] Enable auto-exposure
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I0513 14:07:58.491058 31845 auto_exposure.cc:38] Set MAX_GAIN to 48
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I0513 14:07:58.505131 31845 auto_exposure.cc:39] Set MAX_EXPOSURE_TIME to 240
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I0513 14:07:58.521375 31845 auto_exposure.cc:41] Set DESIRED_BRIGHTNESS to 192
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s2100/s210a：
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.. code-block:: bash
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$ ./samples/_output/bin/tutorials/ctrl_auto_exposure
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I/utils.cc:30 Detecting MYNT EYE devices
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I/utils.cc:40 MYNT EYE devices:
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I/utils.cc:43 index: 0, name: MYNT-EYE-S210A, sn: 07C41A190009071F
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I/utils.cc:51 Only one MYNT EYE device, select index: 0
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I/utils.cc:79 MYNT EYE devices:
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I/utils.cc:82 index: 0, request: width: 1280, height: 400, format: Format::BGR888, fps: 10
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I/utils.cc:82 index: 1, request: width: 1280, height: 400, format: Format::BGR888, fps: 20
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I/utils.cc:82 index: 2, request: width: 1280, height: 400, format: Format::BGR888, fps: 30
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I/utils.cc:82 index: 3, request: width: 1280, height: 400, format: Format::BGR888, fps: 60
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I/utils.cc:82 index: 4, request: width: 2560, height: 800, format: Format::BGR888, fps: 10
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I/utils.cc:82 index: 5, request: width: 2560, height: 800, format: Format::BGR888, fps: 20
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I/utils.cc:82 index: 6, request: width: 2560, height: 800, format: Format::BGR888, fps: 30
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I/utils.cc:93 There are 7 stream requests, select index:
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3
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I/auto_exposure.cc:72 Enable auto-exposure
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I/auto_exposure.cc:73 Set EXPOSURE_MODE to 0
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I/auto_exposure.cc:75 Set MAX_GAIN to 8
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I/auto_exposure.cc:76 Set MAX_EXPOSURE_TIME to 333
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I/auto_exposure.cc:78 Set DESIRED_BRIGHTNESS to 122
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I/auto_exposure.cc:80 Set MIN_EXPOSURE_TIME to 0
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The sample program displays an image with a real exposure time in the upper left corner, in milliseconds.
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Complete code examples, see `auto_exposure.cc <https://github.com/slightech/MYNT-EYE-S-SDK/blob/master/samples/tutorials/control/auto_exposure.cc>`_ .
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