as.pixset(x, ...)

## S3 method for class 'cimg'
as.pixset(x, ...)

## S3 method for class 'pixset'
as.cimg(obj, ...)

#When converting an image to a pixset, the default is to include all pixels with non-zero value 
as.pixset(boats)
#The above is equivalent to:
boats!=0