add DICOM (aka supp 145) support #142 Build Problem

[Mathieu Malaterre]

Benjamin,

On Thu, Sep 10, 2015 at 7:06 AM, Benjamin Gilbert <bgilbert at cs.cmu.edu> wrote:
> On 09/09/2015 02:00 AM, Mathieu Malaterre wrote:
>> On Wed, Sep 9, 2015 at 1:19 AM, Benjamin Gilbert <bgilbert at cs.cmu.edu> wrote:
>>> On 09/05/2015 09:46 AM, Ivo Rakar wrote:
>>>> Is there any plans of making a Dicom format for Openslide?
>>>> And last question in there any hope for a Generic JPEG2000 format for
>>>> Openslide?
>>>
>>> Yes and yes --- eventually.
>>
>> I believe you meant: "Yes and no, at least until there is a decent
>> open-source JPEG 2000 implementation".
>
> Hi Mathieu,
>
> Could you explain?  I've seen
> <https://github.com/uclouvain/openjpeg/issues/376>; are there other
> problems with OpenJPEG?

Long story short, this should not be an issue for OpenSlide, since you
pretty much require direct file access, so fread should be pretty
cheap (ideally would need an fseek instead).

The issue I was thinking of when I added my comment was:
https://github.com/uclouvain/openjpeg/issues/94

Again this is OT here, but even if #94 gets fixed other part of code
will need to be updated. Right now OpenJPEG requires enormous amount
of memory if you request the bottom-right pixel, which makes OpenSlide
pretty much useless for JPEG2000/WSI.

2cts