mean_nmean_nMeanNMeanNmean_n (Operator)

Name

mean_nmean_nMeanNMeanNmean_n — Average gray values over several channels.

Signature

mean_n(Image : ImageMean : : )

Description

The operator mean_nmean_nMeanNMeanNMeanNmean_n generates the pixel-by-pixel mean value of all channels . For each coordinate point the sum of all gray values at this coordinate is calculated. The result is the mean of the gray values (sum divided by the number of channels). The output image has one channel.

For an explanation of the concept of smoothing filters see the introduction of chapter Filters / Smoothing.

Attention

This operator may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter Filters.

Execution Information

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 domain level.

Parameters

ImageImageImageImageimageimage (input_object) (multichannel-)image(-array) → object (byte / int2 / uint2 / int4 / real)

Multichannel gray image.

ImageMeanImageMeanImageMeanImageMeanimageMeanimage_mean (output_object) singlechannelimage(-array) → object (byte / int2 / uint2 / int4 / real)

Result of averaging.

Example (C)

compose3(Channel1,Channel2,Channel3,&MultiChannel);
mean_n(MultiChannel,&Mean);

Possible Predecessors

compose2compose2Compose2Compose2Compose2compose2, compose3compose3Compose3Compose3Compose3compose3, compose4compose4Compose4Compose4Compose4compose4, compose5compose5Compose5Compose5Compose5compose5, add_channelsadd_channelsAddChannelsAddChannelsAddChannelsadd_channels

Alternatives

rank_nrank_nRankNRankNRankNrank_n

Module

Foundation

Operators