demoPoly,Numbers-character-numeric: no visible global function
  definition for 'new'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'gray'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'par'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'image'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'title'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'plot'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'lines'
demoPoly,Numbers-character-numeric: no visible global function
  definition for 'colors'
displayImg,Numbers: no visible global function definition for 'gray'
displayImg,Numbers: no visible global function definition for 'par'
displayImg,Numbers: no visible global function definition for 'image'
displayImg,list: no visible global function definition for 'gray'
displayImg,list: no visible global function definition for 'par'
displayImg,list: no visible global function definition for 'image'
initialize,CmplxIm: no visible global function definition for 'as<-'
initialize,CmplxIm: no visible global function definition for 'new'
initialize,Image: no visible global function definition for 'readJPEG'
initialize,Image: no visible global function definition for 'readPNG'
initialize,Image: no visible global function definition for 'read.bmp'
initialize,OrthIm: no visible global function definition for 'as<-'
initialize,OrthIm: no visible global function definition for 'new'
initialize,OrthIm: no visible binding for global variable 'obj'
momentObj,Numbers-character-Numbers: no visible global function
  definition for 'new'
momentObj,list-character-Numbers: no visible global function definition
  for 'new'
plotMoment,Image: no visible global function definition for 'par'
plotMoment,Image: no visible global function definition for 'image'
plotMoment,Image: no visible global function definition for 'title'
plotMoment,MultiIm: no visible global function definition for 'par'
plotMoment,MultiIm: no visible global function definition for 'image'
plotPoly,MultiIm-Numbers: no visible global function definition for
  'gray'
plotPoly,MultiIm-Numbers: no visible global function definition for
  'par'
plotPoly,MultiIm-Numbers: no visible global function definition for
  'image'
plotPoly,MultiIm-Numbers: no visible global function definition for
  'title'
plotPoly,OrthIm-numeric: no visible global function definition for
  'par'
plotPoly,OrthIm-numeric: no visible global function definition for
  'plot'
plotPoly,OrthIm-numeric: no visible global function definition for
  'title'
plotPoly,OrthIm-numeric: no visible global function definition for
  'lines'
plotPoly,OrthIm-numeric: no visible global function definition for
  'colors'
Undefined global functions or variables:
  as<- colors gray image lines new obj par plot read.bmp readJPEG
  readPNG title
Consider adding
  importFrom("grDevices", "colors", "gray")
  importFrom("graphics", "image", "lines", "par", "plot", "title")
  importFrom("methods", "as<-", "new")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').