log_imagelog_imageLogImageLogImagelog_image (算子名称)

名称

log_imagelog_imageLogImageLogImagelog_image — Calculate the logarithm of an image.

参数签名

log_image(Image : LogImage : Base : )

描述

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.

注意

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.

运行信息

支持OpenCL计算设备。
多线程类型:可重入(与非独占操作符并行运行)。
多线程作用域:全局(可以从任何线程调用)。
在元组级别自动并行化。
在图像通道级别自动并行化。
Automatically parallelized on domain level.

参数表

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

参考其它

pow_imagepow_imagePowImagePowImagePowImagepow_image, exp_imageexp_imageExpImageExpImageExpImageexp_image

模块

Foundation

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