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LogarithmImage
Computes a natural logarithm of each pixel.
| Name | Type | Range | Description | |
|---|---|---|---|---|
 |
inImage | Image | Input image | |
|
inRoi | Region* | Region of interest | |
|
inScale | Real* | Scaling factor (default: 255) | |
|
inOffset | Real | 1.0 -  |
Offset factor |
|
inNormalizeZero | Bool | Specifies whether the output range should be rescaled to start from 0 | |
 |
outImage | Image | Output image | |
 |
diagLutProfile | Profile | Profile depicting the resulting look-up table of the logarithm transform | |
Requirements
For input inImage only pixel formats are supported: int8, uint8, int16, uint16, int32.
Read more about pixel formats in Image documentation.
Applications
Transforms an image in such a way that a quotient on the input image becomes a difference on the output image. This can be useful for dealing with variable illumination.
Examples
Description of usage of this filter can be found in examples and tutorial: Fourier Analysis.
Hardware Acceleration
This operation supports automatic parallelization for multicore and multiprocessor systems.
Errors
This filter can throw an exception to report error. Read how to deal with errors in Error Handling.
List of possible exceptions:
| Error type | Description |
|---|---|
| DomainError | Region exceeds an input image in LogarithmImage. |
| DomainError | Not supported inImage pixel format in AvsFilter_LogarithmImage. |
Complexity Level
This filter is available on Basic Complexity Level.
