Exposure Overlap Time Max#

Exposure Overlap Time Max camera feature 可讓您最佳化 重疊影像擷取。

如果您想要將相機的 frame rate 最大化（也就是說，想要以最高可能的速率進行觸發），使用此參數會特別有用。

此參數僅在您以 Trigger Width 或 Trigger Controlled Exposure Mode 操作相機時可用。

使用功能#

運作原理#

您可以使用 重疊影像擷取 來提高相機的 frame rate。透過重疊影像擷取，新影像的曝光會在相機仍在讀取前一個影像的感光元件資料時開始。

在 Trigger Width 與 Trigger Controlled Exposure Mode 下，相機在觸發週期結束之前無法「得知」影像將曝光多久。因此，相機無法完整最佳化 重疊影像擷取。

為避免此問題，請為 ExposureOverlapTimeMax 參數輸入一個數值，該數值代表您打算使用的 最短 Exposure Time （以 µs 為單位）。這有助於相機最佳化重疊影像擷取。

設定 Exposure Overlap Time Max#

若要在 Trigger Width 或 Trigger Controlled Exposure Mode 下最佳化相機的 frame rate：

1. 將相機中的 TriggerMode 參數設為 TriggerWidth 或 TriggerControlled.
2. 將相機中的 ExposureOverlapTimeMode 參數（若適用）設為 Manual.
3. 為 ExposureOverlapTimeMax 參數輸入一個數值，該數值代表您打算使用的 最短 Exposure Time 輸入一個數值（以 µs 為單位）。

範例： 假設您想要觸發相機以套用介於 3000 µs 到 5500 µs 範圍內的 Exposure Time。在這種情況下，請將相機的 ExposureOverlapTimeMax 參數設為 3000。

其他參數#

開啟 部分相機型號， ExposureOverlapTimeMode 參數可用。

如果該參數可用，您可以將其設為下列其中一個數值：

• Automatic： ExposureOverlapTimeMax 參數的數值會設為最大可能數值且無法修改。此為預設設定。
• Manual： ExposureOverlapTimeMax 您可以依需求設定參數。

如果此參數不可用，相機將一律以「Manual」模式運作。

詳細資料#

顯示所有相機型號

範例程式碼#

ace Classic/U/L GigE 相機#

// 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

其他相機#

// 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 use the pylon Viewer 來輕鬆設定參數。