select_grayvalues_from_channelsselect_grayvalues_from_channelsSelectGrayvaluesFromChannelsSelectGrayvaluesFromChannelsselect_grayvalues_from_channels (Operator)

Name

select_grayvalues_from_channelsselect_grayvalues_from_channelsSelectGrayvaluesFromChannelsSelectGrayvaluesFromChannelsselect_grayvalues_from_channels — Selection of gray values of a multi-channel image using an index image.

Signature

select_grayvalues_from_channels(MultichannelImage, IndexImage : Selected : : )

Description

The operator select_grayvalues_from_channelsselect_grayvalues_from_channelsSelectGrayvaluesFromChannelsSelectGrayvaluesFromChannelsselect_grayvalues_from_channels selects gray values from the different channels of MultichannelImageMultichannelImageMultichannelImagemultichannelImagemultichannel_image. The channel number for each pixel is determined from the corresponding pixel value in IndexImageIndexImageIndexImageindexImageindex_image. Note, IndexImageIndexImageIndexImageindexImageindex_image is allowed to have an arbitrary number of channels for reasons of backward compatibility, but only the first channel is considered.

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

MultichannelImageMultichannelImageMultichannelImagemultichannelImagemultichannel_image (input_object) (multichannel-)image(-array) → object (byte)

Multi-channel gray value image.

IndexImageIndexImageIndexImageindexImageindex_image (input_object) singlechannelimage(-array) → object (byte)

Image, where pixel values are interpreted as channel index.

Number of elements: IndexImage == MultichannelImage || IndexImage == 1

SelectedSelectedSelectedselectedselected (output_object) singlechannelimage(-array) → object (byte)

Resulting image.

Example (C++)

compose3(Focus0,Focus1,Focus2,&MultiFocus);
depth_from_focus(MultiFocus,&Depth,&Confidence,'highpass','next_maximum');
mean_image(Depth,&Smooth,15,15);
select_grayvalues_from_channels(MultiChannel,Smooth,SharpImage);