Exposure Overlap Time Max#

相机的 Exposure Overlap Time Max 功能使您可以优化重叠图像的采集。

如果要最大程度地提高相机的帧速率，即要以尽可能高的速率触发，使用此参数特别有用。

仅当您在触发宽度或触发控制曝光模式下操作相机时，此参数才可用。

该功能的使用#

运作原理#

您可以使用重叠图像采集来提高相机的帧速率。通过重叠图像采集，当相机仍在读取前一图像的传感器数据时，即可开始新图像的曝光。

在触发宽度和触发控制曝光模式下，相机不“知道”在触发时间结束之前将图像曝光多长时间。因此，相机无法完全优化重叠图像采集。

为了避免此问题，请为 ExposureOverlapTimeMax 参数输入一个值，该值表示您打算使用的 最短 Exposure Time （以 µs 为单位）。这有助于相机优化重叠图像采集。

设置最长曝光重叠时间#

要在触发宽度或触发控制曝光模式下优化相机的帧速率：

1. 设置 TriggerMode 参数至 TriggerWidth 或 TriggerControlled.
2. 设置 ExposureOverlapTimeMode 参数（如果可用) 到 Manual.
3. 输入 ExposureOverlapTimeMax 参数输入一个值，该值表示您打算使用的 最短 Exposure Time （以 µs 为单位）。

示例： 假设您想要触发相机以应用 3000 µs 到 5500 µs 范围内的 Exposure Time。在这种情况下，请将相机的 ExposureOverlapTimeMax 参数设置为 3000。

附加参数#

在 某些相机型号， ExposureOverlapTimeMode 参数可用。

如果该参数可用，则可以将其设置为以下值：

• Automatic： ExposureOverlapTimeMax 参数的值已设置为最大可能值，且无法修改。这是默认设置。
• Manual：您可以根据需要配置 ExposureOverlapTimeMax 参数。

如果参数不可用，则相机始终以“手动”模式运行。

详情#

显示所有相机型号

示例代码#

ace Classic/U/L GigE 相机#

// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
camera.ExposureOverlapTimeMaxAbs.SetValue(10000.0);

INodeMap& nodemap = camera.GetNodeMap();
// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
CFloatParameter(nodemap, "ExposureOverlapTimeMaxAbs").SetValue(10000.0);

// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
camera.Parameters[PLCamera.ExposureOverlapTimeMaxAbs].SetValue(10000.0);

/* 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 */
/* Set the maximum overlap time between sensor */
/* exposure and sensor readout to 10000 microseconds */
errRes = PylonDeviceSetFloatFeature(hdev, "ExposureOverlapTimeMaxAbs", 10000.0);
CHECK(errRes);

# Set the maximum overlap time between sensor
# exposure and sensor readout to 10000 microseconds
camera.ExposureOverlapTimeMaxAbs.Value = 10000.0

其他相机#

// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
camera.ExposureOverlapTimeMax.SetValue(10000.0);

INodeMap& nodemap = camera.GetNodeMap();
// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
CFloatParameter(nodemap, "ExposureOverlapTimeMax").SetValue(10000.0);

// Set the maximum overlap time between sensor
// exposure and sensor readout to 10000 microseconds
camera.Parameters[PLCamera.ExposureOverlapTimeMax].SetValue(10000.0);

/* 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 */
/* Set the maximum overlap time between sensor */
/* exposure and sensor readout to 10000 microseconds */
errRes = PylonDeviceSetFloatFeature(hdev, "ExposureOverlapTimeMax", 10000.0);
CHECK(errRes);

# Set the maximum overlap time between sensor
# exposure and sensor readout to 10000 microseconds
camera.ExposureOverlapTimeMax.Value = 10000.0

您也可以使用 pylon Viewer 轻松设置参数。