Compression - CLARITY-HDR and Microsoft's HD Photo Comparison

Author

CLARITY-HDR and Microsoft's HD Photo Comparison

Trellis Management

2007-08-06, 6:56 pm

Subject:

Trellis Management Co. Ltd. announces the first visual comparison with
Microsoft's HD Photo technology.

Introduction:

Presently, there only exist other two methods for encoding HDR - High
Dynamic Range - image data so that it can be compressed using popular
algorithms like JPEG, and just one other method to encode HDR video so
that MPEG-like algorithms can be applied to it.
CLARITY-HDR=E2=84=A2 offers notable advantages over said existing methods
while being simpler to implement, more consistent and much "lighter"
in terms of computational power required for encoding/decoding.

Comparison:

At www.trellis-mgmt.com we present a first comparison between
Microsoft's HD Photo and CLARITY-HDR=E2=84=A2. The test image is the well
known "Grace Cathedral" light probe by Paul Debevec.
The latest available version of the HD Photo plugin for Photoshop=C2=AE CS2/
CS3 has been employed in order to compress the source .hdr (Radiance)
file.
The animation shows the higher details preserved by the CLARITY-HDR=E2=84=
=A2
system, while the file size is even smaller than its HD Photo
counterpart version.

Availability:

A Photoshop CS2/CS3 plugin based on CLARITY-HDR=E2=84=A2 will be available
soon from Trellis Management, free of charge for non-commercial
uses.

About Trellis Management:

Trellis Management Co. Ltd. is a privately held company focused on
technology IP's licensing, acquisition and sale.
We specifically manage technologies that are applicable in the
"Digital Entertainment" market, including:

- Image and video encoding and data compression
- Image and video enhancement systems
- LCD Displays related technologies
- DVD, HD-DVD=E2=84=A2 and Blu-Ray Disc=E2=84=A2 hardware and software solu=
tions
- Video encoding for VOIP and Remote Conferencing systems
- Game-Development related technologies

Our Technical Department ensures technologies are exploitable and
supports potential licensees and buyers during the reviewing process.

For more information:

info @ trellis-mgmt.com
www.trellis-mgmt.com

All names, logos and trademarks cited herein belong to the their
respective owners.

Thomas Richter

2007-08-06, 6:56 pm

Trellis Management schrieb:
> Subject:
>
> Trellis Management Co. Ltd. announces the first visual comparison with
> Microsoft's HD Photo technology.
>
> Introduction:
>
> Presently, there only exist other two methods for encoding HDR - High
> Dynamic Range - image data so that it can be compressed using popular
> algorithms like JPEG, and just one other method to encode HDR video so
> that MPEG-like algorithms can be applied to it.

Unfortunately for you, other methods exist, for example JPEG2000.
Please, before you roll out a white paper and an ad here, get informed.
Seriously!

> CLARITY-HDR™ offers notable advantages over said existing methods
> while being simpler to implement, more consistent and much "lighter"
> in terms of computational power required for encoding/decoding.
>
> Comparison:
>
> At www.trellis-mgmt.com we present a first comparison between
> Microsoft's HD Photo and CLARITY-HDR™. The test image is the well
> known "Grace Cathedral" light probe by Paul Debevec.

You're using a single test image? Folks, I'm happy to run tests and
evaluate the technology provided code is available that I can compile on
my machine and run in batch processing, Linux prefered. No need to open
it, but I don't thrust measurements made by the vendor itself. Sorry,
nothing personal, just good scientific standard.

Besides, you should really test on a larger test set, and with more
alternative codecs to convince people. I mean it.

So long,
Thomas

Trellis Management

2007-08-06, 6:56 pm

On 6 Ago, 18:16, Thomas Richter <t...@math.tu-berlin.de> wrote:
> Unfortunately for you, other methods exist, for example JPEG2000.
> Please, before you roll out a white paper and an ad here, get informed.
> Seriously!
>
ds[color=darkred]
>
>
ll[color=darkred]
>
> You're using a single test image? Folks, I'm happy to run tests and
> evaluate the technology provided code is available that I can compile on
> my machine and run in batch processing, Linux prefered. No need to open
> it, but I don't thrust measurements made by the vendor itself. Sorry,
> nothing personal, just good scientific standard.
>
> Besides, you should really test on a larger test set, and with more
> alternative codecs to convince people. I mean it.
>
> So long,
> Thomas

Thanks for your reply Thomas,

we didn't mean to "convince" people by means of a single test.
As stated in our message, a tool will be available for non commercial
uses, so any individual or organization will be able to test the
output indipendently.

As for other HDR encoding systems, with the term HDR we refer to
"augmented dynamic range", and not "augmented color gamut".
In order to better define of the context we are in, please have a look
at the UCF - University of Central Florida - paper:

http://graphics.cs.ucf.edu/hdri/index.php

Also, all these systems are not intended to replace JPEG or JPEG2000,
at all.
They rather "enable" Jpeg to encode HDR data, which means the data is
fully backward-compatible with existing jpeg-enabled software.

We will be happy to inform you as soon as the CLARITY-HDR tools will
become available.

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