Horizontal resolution - incorrect values?

I have the same image (100 x 100 pixels, created in Corel Photopaint 7.0, at 150 dpi) saved in five different file formats: (BMP, GIF, JPG, PNG and TIF). Trying to get the horizontal resolution using the Main.exe Windows Demo provided along the Aurigma package, I get the folloing results:

PNG and BMP: 149,987

GIF: 72

JPG: 150

TIF: 23,25005.

I realized that the TIF resolution must be multiplied by 2,54 (1 inch = 2,54 cms) twice for me to get the 150. (?????)

Is there anything I´m doing wrong or this is a bug?

Thanks for the answer.

You told your developers would take a look at the TIF case. Is it already fixed? Do you have a expected date to issue a patch or a new version? I´m new to this forum (so I am to Aurigma) and don´t know how your support service works.

Back to the problem, I also found that saving back the image, the resolution tags are changed. I saw it with the following code:

Aurigma.GraphicsMill.Bitmap bitmap = new Aurigma.GraphicsMill.Bitmap(@"c:\a.tif");

bitmap.Save(@"c:\b.tif");

When I open the file c:\b.tif using Corel PhotoPaint, I see the resolution as 23 DPI instead of 150 as I see for c:\a.tif.

We are now in contact with Sean Hall to buy one license. And I really need this fixed. Is there anything you could do? Our deadline is close and this is an important requisite for our project.

Thanks in advance.

Thiago

Thiago.