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paulkoning at comcast.net
Wed Oct 5 12:21:16 CDT 2016
> On Oct 5, 2016, at 1:10 PM, Fred Cisin <cisin at xenosoft.com> wrote:
> On Wed, 5 Oct 2016, Al Kossow wrote:
>> There are very few imaging programs that can handle an image that large.
>> You run into this with scans of blueprints.
> There you have TWO size issues. The original may have enormous physical dimensions.
> A well chosen image format shouldn't have much problem with file size, since the blueprint ia all B&W single bit, made up of line segments and text. An uncompressed bitmap would be ridiculously large, but some format to store the text and positions, and the line segments should be able to bring it down to very manageable size.
That's true, but Al was talking about programs processing those images. While the file may be compressed, when opened and read into memory the full uncompressed image is generated. And it might well be a byte per pixel even for B&W images, because that makes the code simpler and much faster. That said, images in the 100 megapixel range are not much trouble for modern computers. Lots of gigapixels, that might be different.
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