Here goes a method for making an imageView exactly of image so it does not get crop or blur.You have to use a temporary image for this purpose
var imageTemp = Ti.UI.createImageView({
image : someFile.read(),
height:'auto',
width:'auto'
});
Ti.API.info( "height=" + imageTemp.size.height);
Ti.API.info( "width=" + imageTemp.size.width);
imageTemp = null;
Thanks