On Mar 3, 2008, at 12:15 AM, Priyanka Prasad, HCL-Industry Solutions
wrote:
> Adobe's Illustrator is a tool to create images.
Illustrator is a tool for creating vector artwork - as opposed to
Photoshop which is a tool for creating raster artwork.
> Now when an image is
> created using Illustrator it can either be a snapshot that is simply
> embedded there or it can be a manually created image for example if we
> are creating a flower we will manually first create the stem(Object 1)
> then the petals individually(5 objects assuming 5 petals) and so
> on. So
> this image of a flower is made up of several such objects.
While I can understand how you may think of each "object" that you
create in Illustrator as being separate, that is only true in
Illustrator's native drawing - it may not necessary be true when the
file is saved in a format such as PDF.
> When we view
> the PDF structure let's say on any desktop utility e.g. jPDF, the
> utility recognizes these images as im0, im1, im2....
im0, etc. are RASTER images and not vector data that you would have
created using Illustrator's native authoring tools. And you are
correct that these images have no identification back to their source
or your authoring usage.
In addition, vector objects don't have associated information either.
> and so but is unable
> to tell us what objects make what image. Hence, through iText we are
> unable to identify any particular image on any page and so we can't
> remove it.
Right. You would need some other way to determine if it is the
correct object - such as a binary compare of the data.
Leonard
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