TIFF Tag Reference
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TIFF Tag BaselineNoise
| IFD | | Image |
|---|---|---|
| Code | 50731 (hex 0xC62B) | |
| Name | BaselineNoise | |
| LibTiff name | TIFFTAG_BASELINENOISE | |
| Type | RATIONAL | |
| Count | 1 | |
| Default | 1.0 |
Description
Used in IFD 0 of DNG files.
BaselineNoise specifies the relative noise level of the camera model at a baseline ISO value of 100, compared to a reference camera model.
Since noise levels tend to vary approximately with the square root of the ISO value, a raw converter can use this value, combined with the current ISO, to estimate the relative noise level of the current image.