Gamma#

相机的 Gamma 功能使您可以优化所采集图像的亮度，以便在显示器上显示。

该功能的使用#

运作原理#

相机根据以下公式（以彩色相机和红色像素值 (R) 为例）将 Gamma 校正值 (γ) 应用于每个像素的亮度值：

Gamma 校正公式（红色像素）

具体的最大像素值 (Rmax) 视情况而有所不同，例如在 8 位像素格式下为 255，在 10 位像素格式下为 1023。

启用 Gamma 校正#

要启用 Gamma 校正：

设置 GammaEnable parameter to true (如果可用).
For best results, set the BlackLevel parameter to 0.
设置 Gamma 将参数设置为所需值。该参数值的范围是 0 至 ≈4。
- Gamma = 1：整体亮度保持不变。
- Gamma < 1: The overall brightness increases.
- Gamma > 1：整体亮度降低。

在所有情况下，黑色像素（亮度 = 0）和白色像素（亮度 = 最大值）都不会被调整。

信息

如果启用 Gamma 校正，并且像素格式设置为 12 位像素格式，则会丢失一些图像信息。像素数据输出仍将是 12 位，但是像素值将在 Gamma 校正过程中插入。
On boA13440-17cm cameras, gamma correction can only be enabled, if the pixel format is set to an 8-bit pixel format.

附加参数#

根据您的相机型号,可以使用以下附加参数：

GammaEnable: Enables or disables gamma correction.
GammaSelector：允许您选择以下 Gamma 校正模式：
- User: The gamma correction value can be set as desired. (Default.)
- sRGB: The camera automatically sets a gamma correction value of approximately 0.4. This value is optimized for image display on sRGB monitors.
BslColorSpaceMode 或 BslColorSpace：允许您选择以下 Gamma 校正模式：
- RGB: No additional gamma correction value is applied.
- sRGB: The image brightness is optimized for display on an sRGB monitor. A gamma correction value of approximately 0.4 is applied. For more information, see the footnotes in the 详情 section.

详情#

显示所有相机型号

相机型号	附加参数
a2A640-240gmSWIR	无
a2A640-240umSWIR	无
a2A1280-80gmSWIR	无
a2A1280-125umSWIR	无
a2A1920-51gcBAS	BslColorSpace^c
a2A1920-51gcPRO	BslColorSpace^c
a2A1920-51gmBAS	无
a2A1920-51gmPRO	无
a2A1920-160ucBAS	BslColorSpace^c
a2A1920-160ucPRO	BslColorSpace^c
a2A1920-160umBAS	无
a2A1920-160umPRO	无
a2A1920-165g5cBAS	BslColorSpace^c
a2A1920-165g5mBAS	无
a2A2048-35gmSWIR	无
a2A2048-37gcBAS	BslColorSpace^c
a2A2048-37gcPRO	BslColorSpace^c
a2A2048-37gmBAS	无
a2A2048-37gmPRO	无
a2A2048-110umSWIR	无
a2A2048-114g5cBAS	BslColorSpace^c
a2A2048-114g5mBAS	无
a2A2048-114ucBAS	BslColorSpace^c
a2A2048-114ucPRO	BslColorSpace^c
a2A2048-114umBAS	无
a2A2048-114umPRO	无
a2A2440-98g5cBAS	BslColorSpace^c
a2A2440-98g5mBAS	无
a2A2448-23gcBAS	BslColorSpace^c
a2A2448-23gcPRO	BslColorSpace^c
a2A2448-23gmBAS	无
a2A2448-23gmPRO	无
a2A2448-75ucBAS	BslColorSpace^c
a2A2448-75ucPRO	BslColorSpace^c
a2A2448-75umBAS	无
a2A2448-75umPRO	无
a2A2448-105g5cBAS	BslColorSpace^c
a2A2448-105g5mBAS	无
a2A2448-120cc	BslColorSpace^c
a2A2448-120cm	无
a2A2448-210cc	BslColorSpace^c
a2A2448-210cm	无
a2A2560-20gmSWIR	无
a2A2560-70umSWIR	无
a2A2590-22gcBAS	BslColorSpace^c
a2A2590-22gcPRO	BslColorSpace^c
a2A2590-22gmBAS	无
a2A2590-22gmPRO	无
a2A2590-60ucBAS	BslColorSpace^c
a2A2590-60ucPRO	BslColorSpace^c
a2A2590-60umBAS	无
a2A2590-60umPRO	无
a2A2600-20gcBAS	BslColorSpace^c
a2A2600-20gcPRO	BslColorSpace^c
a2A2600-20gmBAS	无
a2A2600-20gmPRO	无
a2A2600-64ucBAS	BslColorSpace^c
a2A2600-64ucPRO	BslColorSpace^c
a2A2600-64umBAS	无
a2A2600-64umPRO	无
a2A2840-14gcBAS	BslColorSpace^c
a2A2840-14gcPRO	BslColorSpace^c
a2A2840-14gmBAS	无
a2A2840-14gmPRO	无
a2A2840-14gmUV	无
a2A2840-48ucBAS	BslColorSpace^c
a2A2840-48ucPRO	BslColorSpace^c
a2A2840-48umBAS	无
a2A2840-48umPRO	无
a2A2840-48umUV	无
a2A2840-67g5cBAS	BslColorSpace^c
a2A2840-67g5mBAS	无
a2A2840-67g5mUV	无
a2A2840-86cc	BslColorSpace^c
a2A2840-86cm	无
a2A3536-9gcBAS	BslColorSpace^c
a2A3536-9gcPRO	BslColorSpace^c
a2A3536-9gmBAS	无
a2A3536-9gmPRO	无
a2A3536-31ucBAS	BslColorSpace^c
a2A3536-31ucPRO	BslColorSpace^c
a2A3536-31umBAS	无
a2A3536-31umPRO	无
a2A3536-42g5cBAS	BslColorSpace^c
a2A3536-42g5mBAS	无
a2A3840-13gcBAS	BslColorSpace^c
a2A3840-13gcPRO	BslColorSpace^c
a2A3840-13gmBAS	无
a2A3840-13gmPRO	无
a2A3840-45ucBAS	BslColorSpace^c
a2A3840-45ucPRO	BslColorSpace^c
a2A3840-45umBAS	无
a2A3840-45umPRO	无
a2A4096-9gcBAS	BslColorSpace^c
a2A4096-9gcPRO	BslColorSpace^c
a2A4096-9gmBAS	无
a2A4096-9gmPRO	无
a2A4096-30ucBAS	BslColorSpace^c
a2A4096-30ucPRO	BslColorSpace^c
a2A4096-30umBAS	无
a2A4096-30umPRO	无
a2A4096-44g5cBAS	BslColorSpace^c
a2A4096-44g5mBAS	无
a2A4096-67cc	BslColorSpace^c
a2A4096-67cm	无
a2A4200-12gcBAS	BslColorSpace^c
a2A4200-12gcPRO	BslColorSpace^c
a2A4200-12gmBAS	无
a2A4200-12gmPRO	无
a2A4200-40ucBAS	BslColorSpace^c
a2A4200-40ucPRO	BslColorSpace^c
a2A4200-40umBAS	无
a2A4200-40umPRO	无
a2A4504-5gcBAS	BslColorSpace^c
a2A4504-5gcPRO	BslColorSpace^c
a2A4504-5gmBAS	无
a2A4504-5gmPRO	无
a2A4504-18ucBAS	BslColorSpace^c
a2A4504-18ucPRO	BslColorSpace^c
a2A4504-18umBAS	无
a2A4504-18umPRO	无
a2A4504-27g5cBAS	BslColorSpace^c
a2A4504-27g5mBAS	无
a2A4504-42cc	BslColorSpace^c
a2A4504-42cm	无
a2A4508-6gcBAS	BslColorSpace^c
a2A4508-6gcPRO	BslColorSpace^c
a2A4508-6gmBAS	无
a2A4508-6gmPRO	无
a2A4508-20ucBAS	BslColorSpace^c
a2A4508-20ucPRO	BslColorSpace^c
a2A4508-20umBAS	无
a2A4508-20umPRO	无
a2A5060-4gcBAS	BslColorSpace^c
a2A5060-4gmBAS	无
a2A5060-15ucBAS	BslColorSpace^c
a2A5060-15umBAS	无
a2A5060-21g5cBAS	BslColorSpace^c
a2A5060-21g5mBAS	无
a2A5320-7gcBAS	BslColorSpace^c
a2A5320-7gcPRO	BslColorSpace^c
a2A5320-7gmBAS	无
a2A5320-7gmPRO	无
a2A5320-23ucBAS	BslColorSpace^c
a2A5320-23ucPRO	BslColorSpace^c
a2A5320-23umBAS	无
a2A5320-23umPRO	无
a2A5320-34g5cBAS	BslColorSpace^c
a2A5320-34g5mBAS	无
a2A5320-52cc	BslColorSpace^c
a2A5320-52cm	无
a2A5328-4gcBAS	BslColorSpace^c
a2A5328-4gcPRO	BslColorSpace^c
a2A5328-4gmBAS	无
a2A5328-4gmPRO	无
a2A5328-15ucBAS	BslColorSpace^c
a2A5328-15ucPRO	BslColorSpace^c
a2A5328-15umBAS	无
a2A5328-15umPRO	无
a2A5328-22g5cBAS	BslColorSpace^c
a2A5328-22g5mBAS	无
a2A5328-35cc	BslColorSpace^c
a2A5328-35cm	无
acA640-121gm	GammaEnable GammaSelector
acA640-300gc	GammaEnable GammaSelector
acA640-300gm	GammaEnable GammaSelector
acA640-750uc	None^a
acA640-750um	None^a
acA720-290gc	GammaEnable GammaSelector
acA720-290gm	GammaEnable GammaSelector
acA720-520uc	None^a
acA720-520um	None^a
acA800-200gc	GammaEnable GammaSelector
acA800-200gm	GammaEnable GammaSelector
acA800-510uc	None^a
acA800-510um	None^a
acA1280-60gc	GammaEnable GammaSelector
acA1280-60gm	GammaEnable GammaSelector
acA1300-60gc	GammaEnable GammaSelector
acA1300-60gm	GammaEnable GammaSelector
acA1300-60gmNIR	GammaEnable GammaSelector
acA1300-75gc	GammaEnable GammaSelector
acA1300-75gm	GammaEnable GammaSelector
acA1300-200uc	None^a
acA1300-200um	None^a
acA1440-73gc	GammaEnable GammaSelector
acA1440-73gm	GammaEnable GammaSelector
acA1440-220uc	None^a
acA1440-220um	None^a
acA1600-20gc	GammaEnable GammaSelector
acA1600-20uc	None^a
acA1600-60gc	GammaEnable GammaSelector
acA1600-60gm	GammaEnable GammaSelector
acA1920-25gc	GammaEnable GammaSelector
acA1920-25gm	GammaEnable GammaSelector
acA1920-25uc	None^a
acA1920-25um	None^a
acA1920-40gc	GammaEnable GammaSelector
acA1920-40gm	GammaEnable GammaSelector
acA1920-40uc	None^a
acA1920-40ucMED	None^a
acA1920-40um	None^a
acA1920-40umMED	None^a
acA1920-48gc	GammaEnable GammaSelector
acA1920-48gm	GammaEnable GammaSelector
acA1920-50gc	GammaEnable GammaSelector
acA1920-50gm	GammaEnable GammaSelector
acA1920-150uc	None^a
acA1920-150um	None^a
acA1920-155uc	None^a
acA1920-155ucMED	None^a
acA1920-155um	None^a
acA1920-155umMED	None^a
acA2000-50gc	GammaEnable GammaSelector
acA2000-50gm	GammaEnable GammaSelector
acA2000-165uc	None^a
acA2000-165um	None^a
acA2040-25gc	GammaEnable GammaSelector
acA2040-25gm	GammaEnable GammaSelector
acA2040-25gmNIR	GammaEnable GammaSelector
acA2040-35gc	GammaEnable GammaSelector
acA2040-35gm	GammaEnable GammaSelector
acA2040-55uc	None^a
acA2040-55um	None^a
acA2040-90uc	None^a
acA2040-90um	None^a
acA2040-90umNIR	None^a
acA2040-120uc	None^a
acA2040-120um	None^a
acA2440-20gc	GammaEnable GammaSelector
acA2440-20gm	GammaEnable GammaSelector
acA2440-35uc	None^a
acA2440-35ucMED	None^a
acA2440-35um	None^a
acA2440-35umMED	None^a
acA2440-75uc	None^a
acA2440-75ucMED	None^a
acA2440-75um	None^a
acA2440-75umMED	None^a
acA2500-14gc	GammaEnable GammaSelector
acA2500-14gm	GammaEnable GammaSelector
acA2500-14uc	None^a
acA2500-14um	None^a
acA2500-20gc	GammaEnable GammaSelector
acA2500-20gcMED	GammaEnable GammaSelector
acA2500-20gm	GammaEnable GammaSelector
acA2500-20gmMED	GammaEnable GammaSelector
acA2500-60uc	None^a
acA2500-60um	None^a
acA3088-16gc	GammaEnable GammaSelector
acA3088-16gm	GammaEnable GammaSelector
acA3088-57uc	None^a
acA3088-57ucMED	None^a
acA3088-57um	None^a
acA3088-57umMED	None^a
acA3800-10gc	GammaEnable GammaSelector
acA3800-10gm	GammaEnable GammaSelector
acA3800-14uc	None^a
acA3800-14um	None^a
acA4024-8gc	GammaEnable GammaSelector
acA4024-8gm	GammaEnable GammaSelector
acA4024-29uc	None^a
acA4024-29um	None^a
acA4096-11gc	GammaEnable GammaSelector
acA4096-11gm	GammaEnable GammaSelector
acA4096-30uc	None^a
acA4096-30ucMED	None^a
acA4096-30um	None^a
acA4096-30umMED	None^a
acA4096-40uc	None^a
acA4096-40ucMED	None^a
acA4096-40um	None^a
acA4096-40umMED	None^a
acA4112-8gc	GammaEnable GammaSelector
acA4112-8gm	GammaEnable GammaSelector
acA4112-20uc	None^a
acA4112-20ucMED	None^a
acA4112-20um	None^a
acA4112-20umMED	None^a
acA4112-30uc	None^a
acA4112-30ucMED	None^a
acA4112-30um	None^a
acA4112-30umMED	None^a
acA5472-5gc	GammaEnable GammaSelector
acA5472-5gm	GammaEnable GammaSelector
acA5472-17uc	None^a
acA5472-17ucMED	None^a
acA5472-17um	None^a
acA5472-17umMED	None^a
boA1936-400cc	BslColorSpace^c
boA1936-400cm	无
boA2448-250cc	BslColorSpace^c
bo2448-250cm	无
boA2832-190cc	BslColorSpace^c
bo2832-190cm	无
boA4096-93cc	BslColorSpace^c
boA4096-93cm	无
boA4096-180cc	BslColorSpace^c
bo4096-180cm	无
boA4112-68cc	BslColorSpace^c
boA4112-68cm	无
boA4500-45cc	BslColorSpace^c
boA4500-45cm	无
boA4504-100cc	BslColorSpace^c
boA4504-100cm	无
boA5120-150cc	不支持 Gamma 功能
boA5120-150cm	不支持 Gamma 功能
boA5120-230cc	不支持 Gamma 功能
boA5120-230cm	不支持 Gamma 功能
boA5320-150cc	BslColorSpace^c
boA5320-150cm	无
boA5328-100cc	BslColorSpace^c
boA5328-100cm	无
boA6500-36cc	BslColorSpace^c
boA6500-36cm	无
boA8100-16cc	BslColorSpace^c
boA8100-16cm	无
boA9344-30cc	不支持 Gamma 功能
boA9344-30cm	不支持 Gamma 功能
boA9344-70cc	不支持 Gamma 功能
boA9344-70cm	不支持 Gamma 功能
boA13440-17cm	无
daA720-520uc	BslColorSpace^a
daA720-520um	无
daA1280-54uc	BslColorSpaceMode ^b
daA1280-54um	无
daA1440-220uc	BslColorSpace^a
daA1440-220um	无
daA1600-60uc	BslColorSpaceMode ^b
daA1600-60um	无
daA1920-15um	无
daA1920-30uc	BslColorSpaceMode ^b
daA1920-30um	无
daA1920-160uc	BslColorSpace^a
daA1920-160um	无
daA2448-70uc	BslColorSpace^a
daA2448-70um	无
daA2500-14uc	BslColorSpaceMode ^b
daA2500-14um	无
daA3840-45uc	BslColorSpace^a
daA3840-45um	无
dmA720-290gc	BslColorSpace^c
dmA720-290gm	无
dmA1440-73gc	BslColorSpace^c
dmA1440-73gm	无
dmA1920-51gc	BslColorSpace^c
dmA1920-51gm	无
dmA2448-23gc	BslColorSpace^c
dmA2448-23gm	无
dmA2840-14gc	BslColorSpace^c
dmA2840-14gm	无
dmA3536-9gc	BslColorSpace^c
dmA3536-9gm	无
dmA4096-9gc	BslColorSpace^c
dmA4096-9gm	无
puA1280-54uc	BslColorSpaceMode ^b
puA1280-54um	无
puA1600-60uc	BslColorSpaceMode ^b
puA1600-60um	无
puA1920-30uc	BslColorSpaceMode ^b
puA1920-30um	无
puA2500-14uc	BslColorSpaceMode ^b
puA2500-14um	无
r2L2048-29gc	BslColorSpace^c
r2L2048-58gm	无
r2L2048-62cc	BslColorSpace^c
r2L2048-62g5c	BslColorSpace^c
r2L2048-172cm	无
r2L2048-172g5m	无
r2L4096-14gc	BslColorSpace^c
r2L4096-29gm	无
r2L4096-42cc	BslColorSpace^c
r2L4096-42g5c	BslColorSpace^c
r2L4096-84cm	无
r2L4096-84g5m	无
r2L8192-200cm	无
r2L16384-120cm	无

If you select a light source preset, an additional gamma correction value of approximately 0.4 is applied (sRGB gamma correction). This value is applied separately and not included in the Gamma parameter value. 示例： You have set the light source preset to Tungsten and the Gamma parameter value to 1.2. First, an automatic correction value of approximately 0.4 is applied to the pixel values. After that, a gamma correction value of 1.2 is applied to the resulting pixel values.
仅在像素格式设置为 YCbCr422 或 RGB8 时可用。
If the color space is set to sRGB, a gamma correction value of approximately 0.4 is applied. This value is applied separately and not included in the Gamma parameter value. 示例： You set the color space to sRGB and the Gamma parameter to 1.2. First, an automatic correction value of approximately 0.4 is applied to the pixel values. After that, a gamma correction value of 1.2 is applied to the resulting pixel values.
If you have selected a Light Source Preset, setting the color space to sRGB will also affect the Balance White, Color Adjustment, and Color Transformation features.
If the color space is set to sRGB, a gamma correction value of approximately 0.4 is applied, the Gamma parameter becomes read-only, and the Gamma parameter value is ignored.

示例代码#

ace 2, boost, and dart R Cameras#

C++ (Native)C++ (Generic)C#C (Generic)Python

// Set the Gamma value to 1.2
camera.Gamma.SetValue(1.2);
// Set the color space to sRGB
camera.BslColorSpace.SetValue(BslColorSpace_sRGB);

INodeMap& nodemap = camera.GetNodeMap();
// Set the Gamma value to 1.2
CFloatParameter(nodemap, "Gamma").SetValue(1.2);
// Set the color space to sRGB
CEnumParameter(nodemap, "BslColorSpace").SetValue("sRGB");

// Set the Gamma value to 1.2
camera.Parameters[PLCamera.Gamma].SetValue(1.2);
// Set the color space to sRGB
camera.Parameters[PLCamera.BslColorSpace].SetValue(PLCamera.BslColorSpace.sRGB);

/* 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 Gamma value to 1.2 */
errRes = PylonDeviceSetFloatFeature(hdev, "Gamma", 1.2);
CHECK(errRes);
/* Set the color space to sRGB */
errRes = PylonDeviceFeatureFromString(hdev, "BslColorSpace", "sRGB");
CHECK(errRes);

# Set the Gamma value to 1.2
camera.Gamma.Value = 1.2
# Set the color space to sRGB
camera.BslColorSpace.Value = "sRGB"

ace Classic/U/L GigE 相机#

C++ (Native)C++ (Generic)C#C (Generic)Python

// Enable the Gamma feature
camera.GammaEnable.SetValue(true);
// Set the gamma type to User
camera.GammaSelector.SetValue(GammaSelector_User);
// Set the Gamma value to 1.2
camera.Gamma.SetValue(1.2);

INodeMap& nodemap = camera.GetNodeMap();
// Enable the Gamma feature
CBooleanParameter(nodemap, "GammaEnable").SetValue(true);
// Set the gamma type to User
CEnumParameter(nodemap, "GammaSelector").SetValue("User");
// Set the Gamma value to 1.2
CFloatParameter(nodemap, "Gamma").SetValue(1.2);

// Enable the Gamma feature
camera.Parameters[PLCamera.GammaEnable].SetValue(true);
// Set the gamma type to User
camera.Parameters[PLCamera.GammaSelector].SetValue(PLCamera.GammaSelector.User);
// Set the Gamma value to 1.2
camera.Parameters[PLCamera.Gamma].SetValue(1.2);

/* 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 the Gamma feature */
errRes = PylonDeviceSetBooleanFeature(hdev, "GammaEnable", 1);
CHECK(errRes);
/* Set the gamma type to User */
errRes = PylonDeviceFeatureFromString(hdev, "GammaSelector", "User");
CHECK(errRes);
/* Set the Gamma value to 1.2 */
errRes = PylonDeviceSetFloatFeature(hdev, "Gamma", 1.2);
CHECK(errRes);

# Enable the Gamma feature
camera.GammaEnable.Value = True
# Set the gamma type to User
camera.GammaSelector.Value = "User"
# Set the Gamma value to 1.2
camera.Gamma.Value = 1.2

其他相机#

C++ (Native)C++ (Generic)C#C (Generic)Python

// Set the Gamma value to 1.2
camera.Gamma.SetValue(1.2);

INodeMap& nodemap = camera.GetNodeMap();
// Set the Gamma value to 1.2
CFloatParameter(nodemap, "Gamma").SetValue(1.2);

// Set the Gamma value to 1.2
camera.Parameters[PLCamera.Gamma].SetValue(1.2);

/* 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 Gamma value to 1.2 */
errRes = PylonDeviceSetFloatFeature(hdev, "Gamma", 1.2);
CHECK(errRes);

# Set the Gamma value to 1.2
camera.Gamma.Value = 1.2

您也可以使用 pylon Viewer 轻松设置参数。