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Gray Value Adjustment Damping#

相机的 Gray Value Adjustment Damping 功能控制在 Exposure Auto 和/或 Gain Auto 启用的情况下，像素灰度值的变化速度。

此功能类似于 Brightness Adjustment Damping 功能，该功能仅在 Basler dart 和 pulse 型号的相机上可用。

该功能的使用#

运作原理#

灰度值调整阻尼系数越低，达到目标亮度值的速度越慢。这有助于避免自动功能因对象进出相机视野而中断等。

信息

Brightness Adjustment Damping 功能（仅在 Basler dart 和 pulse 型号的相机上可用）以截然相反的方式工作：亮度调整阻尼系数越低，达到目标亮度值的速度就越快。

指定阻尼系数#

要指定阻尼系数：

  1. 设置 Exposure Auto or the Gain Auto auto function or both to Once 或 Continuous.
  2. 设置 GrayValueAdjustmentDampingAbs parameter to the desired value.

您可以将该参数设置在 0.0 到 0.78125 的范围内。使用较大的参数值意味着可以更快地达到目标值。

默认情况下，该系数设置为 0.6836。这项设置可让阻尼控制尽可能稳定、快速。

示例代码#

// Enable Gain Auto by setting the operating mode to Continuous
camera.GainAuto.SetValue(GainAuto_Continuous);
// Set gray value adjustment damping to 0.5859
camera.GrayValueAdjustmentDampingAbs.SetValue(0.5859);

INodeMap& nodemap = camera.GetNodeMap();
// Enable Gain Auto by setting the operating mode to Continuous
CEnumParameter(nodemap, "GainAuto").SetValue("Continuous");
// Set gray value adjustment damping to 0.5859
CFloatParameter(nodemap, "GrayValueAdjustmentDampingAbs").SetValue(0.5859);

// Enable Gain Auto by setting the operating mode to Continuous
camera.Parameters[PLCamera.GainAuto].SetValue(PLCamera.GainAuto.Continuous);
// Set gray value adjustment damping to 0.5859
camera.Parameters[PLCamera.GrayValueAdjustmentDampingAbs].SetValue(0.5859);

/* Macro to check for errors */
#define CHECK(errc) if (GENAPI_E_OK != errc) printErrorAndExit(errc)
GENAPIC_RESULT errRes = GENAPI_E_OK;  /* Return value of pylon methods */
/* Enable Gain Auto by setting the operating mode to Continuous */
errRes = PylonDeviceFeatureFromString(hdev, "GainAuto", "Continuous");
CHECK(errRes);
/* Set gray value adjustment damping to 0.5859 */
errRes = PylonDeviceSetFloatFeature(hdev, "GrayValueAdjustmentDampingAbs", 0.5859);
CHECK(errRes);

# Enable Gain Auto by setting the operating mode to Continuous
camera.GainAuto.Value = "Continuous"
# Set gray value adjustment damping to 0.5859
camera.GrayValueAdjustmentDampingAbs.Value = 0.5859

您也可以使用 pylon Viewer 轻松设置参数。