FW: MRXS question

[Angelos Pappas]

Hello,

Even though I am not an OpenSlide user, here's how I calculate the width and the height of MRXS images so that it matches the Pannoramic Viewer:

First of all, calculate the bounds of image (i.e. min & max X & Y) by finding the left/right/top/bottom most tile that actually exists in the file. This means you have to loop through all the camera infos and check each tile if it exists and if it does, compare it against your current min / max x or y. 

Then for max x & y add the tile width & height:
            this.level0MaxX += level0.Info.TileWidth;
            this.level0MaxY += level0.Info.TileHeight;

Finally do this rounding - I don't know it's purpose, I don't use it for any other calculation, it just matches what the Pannoramic viewer shows:
            // this kind of rounding has been observed in the 3DHistech Pannoramic Viewer
            this.level0MinX = Convert.ToInt32(Math.Floor(this.level0MinX / 256.0) * 256);
            this.level0MinY = Convert.ToInt32(Math.Floor(this.level0MinY / 256.0) * 256);
            this.level0MaxX = Convert.ToInt32(Math.Ceiling(this.level0MaxX / 256.0) * 256);
            this.level0MaxY = Convert.ToInt32(Math.Ceiling(this.level0MaxY / 256.0) * 256);

            level0.Width = this.level0MaxX - this.level0MinX;
            level0.Height = this.level0MaxY - this.level0MinY;

Cheers
Angelos


> -----Original Message-----
> From: openslide-users <openslide-users-
> bounces+angelos=smartcode.gr at lists.andrew.cmu.edu> On Behalf Of
> Benjamin Gilbert
> Sent: Tuesday, September 3, 2024 12:20 AM
> To: openslide-users at lists.andrew.cmu.edu
> Subject: Re: FW: MRXS question
> 
> On Mon, Sep 2, 2024 at 2:51 AM Martin Weihrauch
> <m.weihrauch at smartinmedia.com> wrote:
> > I had asked this question in July, but no one replied. Does anyone
> > know about this? If not, of course I will not ask again 😊
> 
> Hi Martin,
> 
> I don't think your question is answerable as written.  Your own evidence
> shows that there is no consensus about how to calculate the size of level 0.  :-)
> 
> Best,
> --Benjamin Gilbert
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