log_imagelog_imageLogImageLogImagelog_image (Operator)

Name

log_imagelog_imageLogImageLogImagelog_image — Calculate the logarithm of an image.

Signature

log_image(Image : LogImage : Base : )

Description

log_imagelog_imageLogImageLogImageLogImagelog_image calculates the logarithm to the base BaseBaseBaseBasebaseValbase of an input image ImageImageImageImageimageimage and stores the result in the image LogImageLogImageLogImageLogImagelogImagelog_image. If ImageImageImageImageimageimage contains gray values outside the valid domain of the logarithm function, i.e., , the corresponding gray values in LogImageLogImageLogImageLogImagelogImagelog_image are set to 0.

Attention

log_imagelog_imageLogImageLogImageLogImagelog_image can be executed on an OpenCL device for byte, int1, int2, uint2, int4, and real images. Note that the results of the OpenCL code may vary from the results produced by the CPU.

Execution Information

Supports OpenCL compute devices.
Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Automatically parallelized on channel level.
Automatically parallelized on domain level.

Parameters

ImageImageImageImageimageimage (input_object) (multichannel-)image(-array) → object (byte* / int1* / uint2* / int2* / int4* / int8 / real*) *allowed for compute devices

Input image.

LogImageLogImageLogImageLogImagelogImagelog_image (output_object) (multichannel-)image(-array) → object (real)

Output image.

BaseBaseBaseBasebaseValbase (input_control) number → (string / integer / real)

Base of the logarithm.

Default: 'e' "e" "e" "e" "e" "e"

Suggested values: 'e'"e""e""e""e""e", 2, 10

Module

Foundation

Operators