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Date Posted: 07:51:17 11/03/00 Fri
Author: Michel
Subject: Re: TIFF file aspect ratio
In reply to: Adam Surplice 's message, "TIFF file aspect ratio" on 19:37:42 11/02/00 Thu


Dear Adam,

I believe that there are "low" and "high" quality fax formats. The low quality simply

removes every second horizontal scan line.

When you print with the demo, do you specify the height explicitely? This would force a

resize.

What you may do is use the TResizeTransform to double the height of the fax. The thing I am

not sure is how to determine if a fax file is "low" or "high" resolution before looking at

the image.

Best regards,

Michel


> Michael or anybody else,
>
> I'm using Envision to read TIFF's which we receive
> from the JFAX fax service (www.j2.com).
>
> TImageScrollBox reads the files ok, but it squashes
> the fax vertically - the height is only about half of
> what it should be. Same thing happens in the Envision
> demo.
>
> When I print these (using the demo or within my
> application), the aspect ratio is correct.
>
> An example fax which displays this behaviour is here:
> <a rel=nofollow target=_blank href="http://www.speakeasy.com.au/fax/MULTIPAGE_FAX.tif">http://www.speakeasy.com.au/fax/MULTIPAGE_FAX.tif</a>
>
> JFAX has a TIFF viewer utility here:
> <a rel=nofollow target=_blank href="http://206.204.003.197/j2faxv4303.exe">http://206.204.003.197/j2faxv4303.exe</a> which displays
> the TIFF's with the correct aspect ratio.
>
> Can anybody shed any light on this?
>
> Adam Surplice

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