Question about readRegion on MIRAX files

[Sowrirajan Sowmithran]

Sorry for the late reply.

Much thanks Dr. Cupitt for your suggestion.

No matter what region I read for a MIRAX file I keep getting the dark
region only. On the other hand I have no difficulties with the svs file.
One additional question is how do I determine the tile-size and block size
of the MIRAX file. I knew from the post by Benjamin that
"CameraImageDivisionsPerSide"
= 4 means a 4x4 blocks but what is the actual size of this tile?

https://lists.andrew.cmu.edu/pipermail/openslide-users/2012-July/000373.html


Any help is much appreciated.

On Sat, Jun 13, 2020 at 5:40 AM <jcupitt at gmail.com> wrote:

> On Fri, 12 Jun 2020 at 17:57, Sowrirajan Sowmithran
> <ssowmith94 at gmail.com> wrote:
> > On trying to apply the openslide_readRegion() function to get the
> desired part (random area) of the data, I end up getting a dark image
> instead (all 0s). Does this have something to do with the MIRAX format or
> the region being empty? If it is the later how do I determine which region
> has data and display it?
>
> 0 means transparent (ie. the slide background colour), so you are
> probably reading outside the image area. I would check the openslide
> bounds:
>
>                 "openslide.bounds-x",
>                 "openslide.bounds-y",
>                 "openslide.bounds-width",
>                 "openslide.bounds-height"
>
> And make sure you are inside them. You could also open the image file
> in a viewer and note the position of some real pixels.
>
> John
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