Oguz Akyuz | 15 May 07:27 2015
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participants needed for an HDR experiment

Dear Friends and Colleagues,

We are conducting a research on the quality of high dynamic range (HDR) deghosting algorithms. We would greatly appreciate if you can take our experiment at the following link:


Thank you all for your contribution,
Ahmet Oğuz Akyüz

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Jacobus Pieter Overduin | 28 Apr 19:31 2015
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help exposure & VIEW

Dear Mr/Mrs,

We are working on a research including the DGP. We have made several fotos and combined this in an .hdr The problem we are facing is the low exposure level influencing the result. The values are low due to this fact. Trying to change something in the pcomb gives the failure "can't open pcomb" The problem is in the .hdr information, opening the file in photoshop gives the image we want to use. But Evalglare doenst uses the information of the .hdr, neccesito to type the information in the cmd. 

With the normal comand in cmd evalglare filename.hdr gives a failure "no valid view specified". Neccesary to type the command C:/HDRI>evalglare -vth -vh 140 -vv 80 filename.hdr to get an result. 

Maybe its the problem we cannot acces the pcomb. 

Thanks in advance. 

Jasper Overduin

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C. Walter Beamer IV | 3 Apr 22:35 2015
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FW: raw2hdr issue

All,

We are trying to use raw2hdr on some raw images we have, but keep getting the below error.  The ExifTool function is in the same folder, however it is exiftool and it is a unix executable file.  Does anyone have a suggestion how to resolve this issue?

Thanks for your help,

Walter

 

Loading NIKON D5200 image from DSC_0107.NEF ...

Scaling with darkness 0, saturation 16383, and

multipliers 1.000000 1.000000 1.000000 1.000000

AHD interpolation...

Building histograms...

Writing data to standard output ...

Can't locate Image/ExifTool.pm in <at> INC (you may need to install the Image::ExifTool module) ( <at> INC contains: /usr/local/raw2hdr/lib /Library/Perl/5.18/darwin-thread-multi-2level /Library/Perl/5.18 /Network/Library/Perl/5.18/darwin-thread-multi-2level /Network/Library/Perl/5.18 /Library/Perl/Updates/5.18.2 /System/Library/Perl/5.18/darwin-thread-multi-2level /System/Library/Perl/5.18 /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level /System/Library/Perl/Extras/5.18 .) at /usr/local/raw2hdr/exiftool line 30.

BEGIN failed--compilation aborted at /usr/local/raw2hdr/exiftool line 30.

Executing: hdrgen -m 400 -e -a -r /tmp/raw2hdr.cjLDXN/sqr.rsp -o output11.hdr -c sRGB /tmp/raw2hdr.cjLDXN/DSC_0092.tif /tmp/raw2hdr.cjLDXN/DSC_0093.tif /tmp/raw2hdr.cjLDXN/DSC_0094.tif /tmp/raw2hdr.cjLDXN/DSC_0095.tif /tmp/raw2hdr.cjLDXN/DSC_0096.tif /tmp/raw2hdr.cjLDXN/DSC_0097.tif /tmp/raw2hdr.cjLDXN/DSC_0098.tif /tmp/raw2hdr.cjLDXN/DSC_0099.tif /tmp/raw2hdr.cjLDXN/DSC_0100.tif /tmp/raw2hdr.cjLDXN/DSC_0101.tif /tmp/raw2hdr.cjLDXN/DSC_0102.tif /tmp/raw2hdr.cjLDXN/DSC_0103.tif /tmp/raw2hdr.cjLDXN/DSC_0104.tif /tmp/raw2hdr.cjLDXN/DSC_0105.tif /tmp/raw2hdr.cjLDXN/DSC_0106.tif /tmp/raw2hdr.cjLDXN/DSC_0107.tif

     Cleaning Bad Pixels ******************************************************

engr2-6-171-dhcp:100D5200 WalterBeamer$ 

 

--

C. Walter Beamer IV, Ph.D.

Instructor – Lighting Program

Civil, Environmental and Architectural Engineering

Rocky Mountain Lighting Academy – http://rmla.colorado.edu

 

University of Colorado at Boulder

Campus Box 428

Boulder, CO 80309-0428

tel: +1 (303) 492-7603 

fax: +1 (303) 492-7317

 

 

 

 

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C. Walter Beamer IV | 15 Mar 04:54 2015
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Re: raw2hdr Missing -o output file specification

Hi Greg,
Thank you for taking a look at my issue. You’re right, the issue was resolved by retyping the command. As you mentioned there must have been a hidden character in the string. I was copy and pasting it from a text document due to the length, but it must have included something strange.
Thanks,
Walter
--

C. Walter Beamer IV, Ph.D.


Hi Walter,

It doesn't really make sense that you would get this error.  Are you sure there aren't some "hidden characters" or something else going on with your command line?  I can't reproduce this on my end.

-Greg

From: "C. Walter Beamer IV" <Walter.Beamer <at> Colorado.EDU>
Subject: [HDRI] raw2hdr Missing -o output file specification
Date: March 13, 2015 6:46:47 PM EDT
To: "hdri <at> radiance-online.org" <hdri <at> radiance-online.org>

All,
I am trying to use raw2hdr to compile an HDR image. In the process, I get the following error

raw2hdr -o output.hdr DSC_0092.NEF DSC_0093.NEF
Missing -o output file specification

I am unsure why this error occurs, my hdrgen works with the same format (when *.NEF are replaced by*.JPG images).


Sincerely,
Walter
--
C. Walter Beamer IV, Ph.D.
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End of HDRI Digest, Vol 75, Issue 1
***********************************

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C. Walter Beamer IV | 13 Mar 23:46 2015
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raw2hdr Missing -o output file specification

All,
I am trying to use raw2hdr to compile an HDR image. In the process, I get the following error

raw2hdr -o output.hdr DSC_0092.NEF DSC_0093.NEF
Missing -o output file specification

I am unsure why this error occurs, my hdrgen works with the same format (when *.NEF are replaced by*.JPG images).


Sincerely,
Walter
--

C. Walter Beamer IV, Ph.D.



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Oguz Akyuz | 11 Sep 14:26 2014
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volunteers needed for an HDR deghosting experiment

Dear HDRI List Members,

As part of a research project that we are engaged in, we are conducting a user study and we desperately need participants. The task involves comparing several images which are outputs of HDR deghosting algorithms.

This is a study which everyone can do in front of his or her computer and lasts for less than 30 minutes (most people finish it in 15-20 mins). The link to the user study is below:


All instructions are explained in that page. My student and I would greatly appreciate if you can be a participant in this user study. We would be further delighted if you can forward this link to anybody else who might be interested.

Thanks very much and all the best,
Ahmet Oguz Akyuz
METU - Department of Computer Engineering
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Marie-Claude Dubois | 19 Aug 16:37 2014
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Radiance ximage viewer

Hello,

Does anyone know where I can find the Radiance ximage viewer?

I would like to use the simple "t" command to pick a luminance value in a HDR image.

I used to have it but cannot locate it anymore and do not feel like a full program reinstallation....

Or can you suggest another way (apart from sending my image to pvalue)

Thx

 

<><><><><><><><><><><><>

Marie-Claude Dubois, M. Arch. PhD

Associate professor / Lektor

Energy and Building Design

+46 46 222 7629

www.ebd.lth.se

www.ides-edu.eu

<><><><><><><><><><><><>

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Tobias Porsch | 23 Jul 17:27 2014
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Question about header information of HDRI

Hi,

 

I'm writing you concerning my current project.

I'm working for TechnoTeam company. Manyfacturer of imaging luminance measuring devices (camera photometer).

Our aim is to export our own image file format (pixel-wise HDR float values) into the Radiance rgbe file format.

The aim is to give radiance users access to the measured luminance information combined with our information about lens configuration (geometrical data).

This may of interest for the "glare" community when analyzing the glare using radiance tools.


Anyway, writing the rgbe information is no problem.

 

But what about the header structure of the radiance HDRI format?

I'm a little confused about it and can't find a documentation structure how it is organized?

Unfortunately I'm no radiance user for carrying out own radiance projects to study it?

 

With my best regards

Dipl.-Ing. Tobias Porsch

TechnoTeam Bildverarbeitung GmbH
Werner - von - Siemens - Strasse 5
98693 Ilmenau
----------------------------------------------------------------------------
Email:  tobias.porsch-yK7Zb1w85sPk6LO42iOHOw@public.gmane.org
Phone: +49 3677 4624 0

 

TechnoTeam Bildverarbeitung GmbH

Geschäftsführer: apl. Prof. Dr.-Ing. habil. F. Schmidt

Standort: Ilmenau

Handelsregistereintrag: Jena HRB 300912

 

 

 

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gs33070 | 22 Apr 04:59 2014
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HDRI Digest, Vol 70, Issue 5


I have one more question regarding the calibration:

I am doing daylight research in an office area with alternative 
shadings (artificial lighting is off during the study).
Is using the  Illuminance calibration with the help of handhold 
illuminance meter a correct way of calibrating the  HDR photos In my 
case?

V. Kumaragurubaran and M. Inanici have proposed this method for special 
cases such as sun and sky capture.

Dear Lars:Thank you for your proposed alternatives. Webhdr is a great, 
user friendly tool and I was not aware of that.

Thanks Greg. I've tried to make it short.

Regards
Fatemeh
M.ARCH
UNIVERSITY PUTRA MALAYSIA
gs33070 | 21 Apr 06:16 2014
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Re: HDRI Digest, Vol 70, Issue 4

On Sat, 19 Apr 2014 12:00:00 -0700,
hdri-request@... 
wrote:
> Send HDRI mailing list submissions to
> 	hdri@...
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://www.radiance-online.org/mailman/listinfo/hdri
> or, via email, send a message with subject or body 'help' to
> 	hdri-request@...
>
> You can reach the person managing the list at
> 	hdri-owner@...
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of HDRI digest..."
>
>
> Today's Topics:
>
>    1. Re: HDRI Digest, Vol 70, Issue 3 (gs33070)
>    2. Re: HDRI Digest, Vol 70, Issue 3 (Lars O. Grobe)
>
>
> 
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 19 Apr 2014 12:29:04 +0800
> From: gs33070 <gs33070@...>
> To: <hdri@...>
> Subject: Re: [HDRI] HDRI Digest, Vol 70, Issue 3
> Message-ID: <26abe49d1df7e0e4a44888d55c095a43@...>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> On Thu, 17 Apr 2014 12:00:00 -0700, hdri-request@...
> wrote:
>> Send HDRI mailing list submissions to
>> 	hdri@...
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> 	http://www.radiance-online.org/mailman/listinfo/hdri
>> or, via email, send a message with subject or body 'help' to
>> 	hdri-request@...
>>
>> You can reach the person managing the list at
>> 	hdri-owner@...
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of HDRI digest..."
>>
>>
>> Today's Topics:
>>
>>    1. Re: HDR for Glare Analysis (Lars O. Grobe)
>>    2. Re: HDR for Glare Analysis (Gregory J. Ward)
>>
>>
>>
>> 
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Thu, 17 Apr 2014 12:14:35 +0200
>> From: "Lars O. Grobe" <grobe@...>
>> To: High Dynamic Range Imaging <hdri@...>
>> Subject: Re: [HDRI] HDR for Glare Analysis
>> Message-ID: <534FA98B.5040009@...>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> Hi Fatemeh,
>>
>> I do not know wether the dynamic range of the raw images you get 
>> from
>> your camera matches the requirements of what you intend to do with
>> those
>> images. The wide dynamic range in typical daylid scenes led folks
>> here
>> to use exposure series. About the software, I have some doubts that
>> Adobe will tell you about the internals of their HDR code. So it 
>> will
>> be
>> difficult to get support or any information about the meaning of
>> pixel
>> values in the resulting images. Does Adobe claim the resulting HDR
>> images to have physically correct values?
>>
>> Cheers, Lars.
>>
>>> Hi there:
>>> I have a question that concerns HDR photo and Glare analysis.
>>>
>>> Can I use Adobe Photoshop CC (which has the Camera Raw plugin) to
>>> prepare my HDR images?
>>> after that calibrate it with the use of HDRSCOPE that is proposed 
>>> by
>>> Mehlika Inanici. Instead of Photosphere?
>>> Regards
>>> Fatemeh
>>> M.Arch
>>> University Putra Malaysia
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Thu, 17 Apr 2014 08:37:18 -0700
>> From: "Gregory J. Ward" <gregoryjward@...>
>> To: High Dynamic Range Imaging <hdri@...>
>> Subject: Re: [HDRI] HDR for Glare Analysis
>> Message-ID: <B3ABE9C2-A524-4067-8C9F-CCED10742082@...>
>> Content-Type: text/plain; charset=us-ascii
>>
>> While you *might* be able to use Adobe's CameraRAW processor to
>> convert the original images to JPEGs, later to be combined using
>> hdrgen or similar, Lars is right that Photoshop itself does not
>> maintain absolute photometric calibration throughout its processing.
>>
>> Adobe actually hired me to improve their HDR image merge process, so
>> CS3 and later (I think) derive a camera curve and maintain correct
>> relative values in the images, similar to Photosphere, but I never
>> convinced Adobe to include calibration information in their output.
>> So, you would need to include a gray card or something whose
>> luminance
>> you measured when you captured the image and use this to correct the
>> final output using a scale factor.  (It is usually a good idea to do
>> this, anyway.)  The procedure for doing this can be found on Mehlika
>> Inanici's site, and also in other posts to this mailing list.
>>
>> Cheers,
>> -Greg
>>
>>> From: "Lars O. Grobe" <grobe@...>
>>> Subject: Re: [HDRI] HDR for Glare Analysis
>>> Date: April 17, 2014 3:14:35 AM PDT
>>>
>>> Hi Fatemeh,
>>>
>>> I do not know wether the dynamic range of the raw images you get
>>> from your camera matches the requirements of what you intend to do
>>> with those images. The wide dynamic range in typical daylid scenes 
>>> led
>>> folks here to use exposure series. About the software, I have some
>>> doubts that Adobe will tell you about the internals of their HDR 
>>> code.
>>> So it will be difficult to get support or any information about the
>>> meaning of pixel values in the resulting images. Does Adobe claim 
>>> the
>>> resulting HDR images to have physically correct values?
>>>
>>> Cheers, Lars.
>>>
>>>> Hi there:
>>>> I have a question that concerns HDR photo and Glare analysis.
>>>>
>>>> Can I use Adobe Photoshop CC (which has the Camera Raw plugin) to
>>>> prepare my HDR images?
>>>> after that calibrate it with the use of HDRSCOPE that is proposed
>>>> by Mehlika Inanici. Instead of Photosphere?
>>>> Regards
>>>> Fatemeh
>>>> M.Arch
>>>> University Putra Malaysia
>>>
>>
>>
>>
>> ------------------------------
>>
>> _______________________________________________
>> HDRI mailing list
>> HDRI@...
>> http://www.radiance-online.org/mailman/listinfo/hdri
>>
>>
>> End of HDRI Digest, Vol 70, Issue 3
>> ***********************************
> Thank you guys for your reply:
>
> I think I will go for Greg solution, including a gray card or 
> something
> whose luminance that I captured the image and use this to correct the
> output using a scale factor.
> I wish there was a Photosphere for windows also.
> cheers
> Fatemeh
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 19 Apr 2014 16:25:31 +0200
> From: "Lars O. Grobe" <grobe@...>
> To: High Dynamic Range Imaging <hdri@...>
> Subject: Re: [HDRI] HDRI Digest, Vol 70, Issue 3
> Message-ID: <ECDA05E5-FAF6-417E-A327-945C68564B2F@...>
> Content-Type: text/plain;	charset=us-ascii
>
> Hi Fatemeh,
>
> are you aware of alternatives such as pfstools and webhdr?
>
> Cheers, Lars.
>
>
>
> ------------------------------
>
> _______________________________________________
> HDRI mailing list
> HDRI@...
> http://www.radiance-online.org/mailman/listinfo/hdri
>
>
> End of HDRI Digest, Vol 70, Issue 4
> ***********************************

Dear Lars:

Thank you for your proposed alternatives. Webhdr is a great, user 
friendly tool and I was not aware of that.
I have one more question regarding the calibration.

V. Kumaragurubaran and M. Inanici have proposed two methods for 
calibration. one is based on measuring the absolute luminance of the 
graycard and the other one is based one measuring the illuminance at the 
camera level in the scene that they suggest it for special cases such as 
sun and sky capture.

I am doing daylight research in an office area with alternative 
shadings (artificial lighting is off during the study).
Is using the  Illuminance calibration that utilizes captured 
illuminance of the camera level with the handhold illuminance meter 
(proposed in hdrscope) a correct way of calibrating the  HDR photos In 
my case?

Regards
Fatemeh
M.ARCH
UNIVERSITY PUTRA MALAYSIA
gs33070 | 19 Apr 06:29 2014
Picon

Re: HDRI Digest, Vol 70, Issue 3

On Thu, 17 Apr 2014 12:00:00 -0700,
hdri-request@... 
wrote:
> Send HDRI mailing list submissions to
> 	hdri@...
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://www.radiance-online.org/mailman/listinfo/hdri
> or, via email, send a message with subject or body 'help' to
> 	hdri-request@...
>
> You can reach the person managing the list at
> 	hdri-owner@...
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of HDRI digest..."
>
>
> Today's Topics:
>
>    1. Re: HDR for Glare Analysis (Lars O. Grobe)
>    2. Re: HDR for Glare Analysis (Gregory J. Ward)
>
>
> 
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 17 Apr 2014 12:14:35 +0200
> From: "Lars O. Grobe" <grobe@...>
> To: High Dynamic Range Imaging <hdri@...>
> Subject: Re: [HDRI] HDR for Glare Analysis
> Message-ID: <534FA98B.5040009@...>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi Fatemeh,
>
> I do not know wether the dynamic range of the raw images you get from
> your camera matches the requirements of what you intend to do with 
> those
> images. The wide dynamic range in typical daylid scenes led folks 
> here
> to use exposure series. About the software, I have some doubts that
> Adobe will tell you about the internals of their HDR code. So it will 
> be
> difficult to get support or any information about the meaning of 
> pixel
> values in the resulting images. Does Adobe claim the resulting HDR
> images to have physically correct values?
>
> Cheers, Lars.
>
>> Hi there:
>> I have a question that concerns HDR photo and Glare analysis.
>>
>> Can I use Adobe Photoshop CC (which has the Camera Raw plugin) to
>> prepare my HDR images?
>> after that calibrate it with the use of HDRSCOPE that is proposed by
>> Mehlika Inanici. Instead of Photosphere?
>> Regards
>> Fatemeh
>> M.Arch
>> University Putra Malaysia
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 17 Apr 2014 08:37:18 -0700
> From: "Gregory J. Ward" <gregoryjward@...>
> To: High Dynamic Range Imaging <hdri@...>
> Subject: Re: [HDRI] HDR for Glare Analysis
> Message-ID: <B3ABE9C2-A524-4067-8C9F-CCED10742082@...>
> Content-Type: text/plain; charset=us-ascii
>
> While you *might* be able to use Adobe's CameraRAW processor to
> convert the original images to JPEGs, later to be combined using
> hdrgen or similar, Lars is right that Photoshop itself does not
> maintain absolute photometric calibration throughout its processing.
>
> Adobe actually hired me to improve their HDR image merge process, so
> CS3 and later (I think) derive a camera curve and maintain correct
> relative values in the images, similar to Photosphere, but I never
> convinced Adobe to include calibration information in their output.
> So, you would need to include a gray card or something whose 
> luminance
> you measured when you captured the image and use this to correct the
> final output using a scale factor.  (It is usually a good idea to do
> this, anyway.)  The procedure for doing this can be found on Mehlika
> Inanici's site, and also in other posts to this mailing list.
>
> Cheers,
> -Greg
>
>> From: "Lars O. Grobe" <grobe@...>
>> Subject: Re: [HDRI] HDR for Glare Analysis
>> Date: April 17, 2014 3:14:35 AM PDT
>>
>> Hi Fatemeh,
>>
>> I do not know wether the dynamic range of the raw images you get 
>> from your camera matches the requirements of what you intend to do 
>> with those images. The wide dynamic range in typical daylid scenes led 
>> folks here to use exposure series. About the software, I have some 
>> doubts that Adobe will tell you about the internals of their HDR code. 
>> So it will be difficult to get support or any information about the 
>> meaning of pixel values in the resulting images. Does Adobe claim the 
>> resulting HDR images to have physically correct values?
>>
>> Cheers, Lars.
>>
>>> Hi there:
>>> I have a question that concerns HDR photo and Glare analysis.
>>>
>>> Can I use Adobe Photoshop CC (which has the Camera Raw plugin) to 
>>> prepare my HDR images?
>>> after that calibrate it with the use of HDRSCOPE that is proposed 
>>> by Mehlika Inanici. Instead of Photosphere?
>>> Regards
>>> Fatemeh
>>> M.Arch
>>> University Putra Malaysia
>>
>
>
>
> ------------------------------
>
> _______________________________________________
> HDRI mailing list
> HDRI@...
> http://www.radiance-online.org/mailman/listinfo/hdri
>
>
> End of HDRI Digest, Vol 70, Issue 3
> ***********************************
Thank you guys for your reply:

I think I will go for Greg solution, including a gray card or something 
whose luminance that I captured the image and use this to correct the 
output using a scale factor.
I wish there was a Photosphere for windows also.
cheers
Fatemeh

Gmane