Detection of objects from integer-based segmented images

Description

This function will assign features matrix to an image that was originally segmented with watershed or similar functions (i.e. in which objects are encoded as positive integers).

Usage

    getObjects(x, ref, ...)
    stackObjects(x, ref, ...)
    features(x, ...)
    features(x, ...) <- value

Arguments

x

An object of Image-class in the Grayscale mode with integer-absed object encoding, as returned by watershed.

ref

A reference image. This can be NULL or Grayscale for getObjects to determined object intensities. This must be present and can be in any color mode for stackObjects.

...

Reserved for future use.

Value

getObjects returns a list of matrixes (one per image in stack) with image descriptors. This list can be stored with the image using the set function features<- and retrieved from the object using the corresponding get function features. Every matrix in the list will contain named columns of features starting with object position, size, perimeter etc. with one row per object detected.

stackObjects returns a list of Image stacks with one element of a list for each frame in the original Image (-stack). Each Image stack will contain images of single objects positioned in the middle of the image in the same color mode as the reference images. The result can be directly supplied to tile to generate tiled previews.

See Also

Image-class, watershed, paintObjects

References

ImageMagick: http://www.imagemagick.org.

Author(s)

Copyright (c) 2005-2006 Oleg Sklyar : osklyar@ebi.ac.uk

Examples

    ## Not run: See ?watershed for example