---
title: kCGImagePropertyDNGBlackLevelDeltaV
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagepropertydngblackleveldeltav
---

# kCGImagePropertyDNGBlackLevelDeltaV

The difference between the zero-light encodoing level for each row and the baseline zero-light encoding level.

## Declaration

```swift
let kCGImagePropertyDNGBlackLevelDeltaV: CFString
```

## See Also

### Color Calibration

- [kCGImagePropertyDNGBlackLevelRepeatDim](imageio/kcgimagepropertydngblacklevelrepeatdim.md)
- [kCGImagePropertyDNGBlackLevel](imageio/kcgimagepropertydngblacklevel.md)
- [kCGImagePropertyDNGBlackLevelDeltaH](imageio/kcgimagepropertydngblackleveldeltah.md)
- [kCGImagePropertyDNGWhiteLevel](imageio/kcgimagepropertydngwhitelevel.md)
- [kCGImagePropertyDNGCalibrationIlluminant1](imageio/kcgimagepropertydngcalibrationilluminant1.md)
- [kCGImagePropertyDNGCalibrationIlluminant2](imageio/kcgimagepropertydngcalibrationilluminant2.md)
- [kCGImagePropertyDNGColorMatrix1](imageio/kcgimagepropertydngcolormatrix1.md)
- [kCGImagePropertyDNGColorMatrix2](imageio/kcgimagepropertydngcolormatrix2.md)
- [kCGImagePropertyDNGCameraCalibration1](imageio/kcgimagepropertydngcameracalibration1.md)
- [kCGImagePropertyDNGCameraCalibration2](imageio/kcgimagepropertydngcameracalibration2.md)
- [kCGImagePropertyDNGReductionMatrix1](imageio/kcgimagepropertydngreductionmatrix1.md)
- [kCGImagePropertyDNGReductionMatrix2](imageio/kcgimagepropertydngreductionmatrix2.md)
- [kCGImagePropertyDNGAsShotICCProfile](imageio/kcgimagepropertydngasshoticcprofile.md)
- [kCGImagePropertyDNGAsShotPreProfileMatrix](imageio/kcgimagepropertydngasshotpreprofilematrix.md)
- [kCGImagePropertyDNGCurrentICCProfile](imageio/kcgimagepropertydngcurrenticcprofile.md)