2005.09.06 21:09 "Re: [Tiff] Question on orientation variations", by Pascal Peuch

Hello Katrina,

It looks like your viewer is not supporting the Orientation tag and makes the asumption that image is always in 'default' orientation. I don't understand what your API is and what you mean by "running throw the API". Neither I understand what you mean by "parsing" an image. I guess that your "API" is modifying the image, rotating it and writing it with the 'default' orientation. That's could be why your viewer sees it rotated after that.

Do you have any tool to see and change tiff tags?

Subject: Fwd: [Tiff] Question on orientation variations

> Any ideas will be appreciated.. :)
>
> --- katrina maramba <ka3na_423@yahoo.com> wrote:
>
>> Date: Tue, 30 Aug 2005 22:27:11 -0700 (PDT)
>> From: katrina maramba <ka3na_423@yahoo.com>
>> To: tiff@lists.maptools.org
>> Subject: [Tiff] Question on orientation variations

I have an image where its orientation = 6, the oth column represent the visual right hand side of the image and the 0th column represents the visual top.

Question: Why is it that when I open the original image, it is on another orientation (which I assume is "1", 0th row represents visual top and 0th column represents visual left-hand side, since the picture is upright as it should be) and after running it through the API's and opening it again, it is on another orientation (which I assume is "6", the picture is a clockwise rotate of the upright picture)?

Is that the right behavior? Should the original picture be on a different orientation than the one after parsing?

FYI - My current image viewer is IrFranView. Maybe that would be a factor (?).

>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> _______________________________________________
> Tiff mailing list: Tiff@lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/tiff
> http://www.remotesensing.org/libtiff/
>