measure image (GIF, PNG, JPEG ,,, etc) size
receive image & measure size. argument is image String or IO.
return type
return height size
return width size
return type list (Array).
open("image.gif", "rb") do |fh| img = ImageSize.new(fh.read) end
open("image.gif", "rb") do |fh| img = ImageSize.new(fh) end
ImageSize.type => ["PCX", "PSD", "XPM", "TIFF", "XBM", "XV", "PGM", "PBM", "PPM", "BMP", "JPEG", "PNG", "GIF", "OTHER"]