HDRI Digest, Vol 68, Issue 1

I appreciate your comment Axel!!

I slightly modified my code and it is working now.

However, I have one more question!

My HDR process is like below.

(Please, let me know if there is something wrong in my script.)

···

=====================================================

Cropping the original HDR image to match the size with the vignetting filter file
ra_xyze -r -o -u Original.hdr | pcompos -x 4368 -y 2912 - -408 -272 > Resized_for_Vignetting.hdr

Applying the vignetting filter to the cropped HDRI
pcomb -e 'ro=ri(1) / ri(2);go=gi(1) / gi(2);bo=bi(1) / bi(2)' Resized_for_Vignetting.hdr Vignetting_Filter.hdr > Vignetting_Corrected.hdr

Resizing the HDRI for glare analysis
pfilt -x 1200 -y 800 Vignetting_Corrected.hdr > Vignetting_Corrected_resized.hdr

Cropping the HDRI for glare analysis
ra_xyze -r -o -u Vignetting_Corrected_resized.hdr | pcompos -x 800 -y 800 - -200 0 > Cropped.hdr

Creating the cleaning filter
ra_tiff -r Cleaning_filter.tif Cleaning_filter.hdr

Applying the cleaning filter on the resized HDRI
pcomb Cropped.hdr -s -1000 Cleaning_filter.hdr > Final.hdr

Running the Evalglare analysis
evalglare -vta -vh 180 -vv 180 Final.hdr

=====================================================

After the process above, The header file is like below.

  #?RADIANCE
  CAPDATE= 2014:02:26 22:58:34
  GMT= 2014:02:27 04:58:34
  /Users/jonghoonkim/Desktop/Sample HDRI/Crop800_800.hdr:
    CAPDATE= 2014:02:26 22:51:52
    GMT= 2014:02:27 04:51:52
    <stdin>:
      CAPDATE= 2014:02:26 22:16:03
      GMT= 2014:02:27 04:16:03
      /Users/jonghoonkim/Desktop/Sample HDRI/Big_for_Vignetting.hdr:
        CAPDATE= 2014:02:26 22:09:29
        GMT= 2014:02:27 04:09:29
        <stdin>:
          CAMERA= Canon Canon EOS 60D version v.0
          Photosphere created HDR image from 'Jong_-2014-0111-1104-14.jpg' 'Jong_-2014-0111-1104-17.jpg' 'Jong_-2014-0111-1104-20.jpg' 'Jong_-2014-0111-1104-22.jpg' 'Jong_-2014-0111-1104-25.jpg' 'Jong_-2014-0111-1104-28.jpg' 'Jong_-2014-0111-1104-31.jpg' 'Jong_-2014-0111-1104-34.jpg' 'Jong_-2014-0111-1104-37.jpg' 'Jong_-2014-0111-1104-40.jpg' 'Jong_-2014-0111-1104-44.jpg' 'Jong_-2014-0111-1104-48.jpg' 'Jong_-2014-0111-1104-53.jpg'
          VIEW= -vtv -vh 132.979172 -vv 113.747666
          CAPDATE= 2014:01:11 12:05:53
          ra_xyze -r -o -u "/Users/jonghoonkim/Desktop/Sample HDRI/Big.hdr"
          PRIMARIES= 0.6400 0.3300 0.2900 0.6000 0.1500 0.0600 0.3333 0.3333
        pcompos -x 4368 -y 2912 - -408 -272
      /Users/jonghoonkim/Desktop/Sample HDRI/Sigma_f56FishVigL.hdr:
        # Output from HDRShop
        EXPOSURE= 1.0000000000000
      pcomb -e "ro=ri(1) / ri(2);go=gi(1) / gi(2);bo=bi(1) / bi(2)" "/Users/jonghoonkim/Desktop/Sample HDRI/Big_for_Vignetting.hdr" "/Users/jonghoonkim/Desktop/Sample HDRI/Sigma_f56FishVigL.hdr"
      pfilt -x 1200 -y 800
      ra_xyze -r -o -u "/Users/jonghoonkim/Desktop/Sample HDRI/Resize.hdr"
      PRIMARIES= 0.6400 0.3300 0.2900 0.6000 0.1500 0.0600 0.3333 0.3333
    pcompos -x 800 -y 800 - -200 0
  /Users/jonghoonkim/Desktop/Sample HDRI/Cleaning_filter.hdr:
    ra_tiff -r
    CAPDATE= 2014:02:25 16:15:37
  pcomb "/Users/jonghoonkim/Desktop/Sample HDRI/Crop800_800.hdr" -s -1000 "/Users/jonghoonkim/Desktop/Sample HDRI/Cleaning_filter.hdr"
  FORMAT=32-bit_rle_rgbe

=====================================================

The header file is very long like above after the whole process.

I could run evalglare with the final.hdr. ( It looks OK until now.)

Is the header file is OK for futhur HDRI analysis?

Are there any potential error source in the head?

If I need to modify the head, can you explain a little bit more on vim and Radiance’s info?

Have a good day!

Best regards,
Jonghoon Kim

On Feb 26, 2014, at 2:00 PM, [email protected] wrote:

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Today's Topics:

  1. Crop HDRIs in radiance and evalglare (Jonghoon Kim)
  2. Re: Crop HDRIs in radiance and evalglare (Axel Jacobs)

----------------------------------------------------------------------

Message: 1
Date: Wed, 26 Feb 2014 09:33:10 -0600
From: Jonghoon Kim <[email protected]>
To: [email protected]
Subject: [HDRI] Crop HDRIs in radiance and evalglare
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"

Dear list,

I am trying to glare analysis via HDR images captured by a canon DSLR Camera and sigma fish eye lens.

The procedure that I use was

1. Taking 13 images via gphoto2 +Crontab

2. Creating HDR images in HDRgen

3. Resize
pfilt -x 1433 -y 955 Big.hdr > resize.hdr

4.Crop & cleaning mask
ra_xyze -r -o -u resize.hdr | pcompos -x 800 -y 800 - -315 -78 > crop.hdr | pcomb -s -1000 output_masked2.hdr

5. Evalglare analysis
echo "VIEW= -vta -vh 180 -vv 180 -vp 0 0 0 -vd 1 0 0 -vu 0 0 1" > output_masked2.hdr
evalglare output_masked2.hdr

The problem is that Evalglare reports errors after the crop process.

error: no valid view specified

(There was no evalglare errors when I test it with the resized image.)

I has checked the luminance values of the HDR in photosphere and it looks OK!

Do I need to use another crop command for evalglare processing?

Please, let me know if you have any ideas.

Best regards,
Jonghoon Kim
Ph.D. student
Texas A&M University

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Message: 2
Date: Wed, 26 Feb 2014 16:25:28 +0000
From: Axel Jacobs <[email protected]>
To: High Dynamic Range Imaging <[email protected]>
Subject: Re: [HDRI] Crop HDRIs in radiance and evalglare
Message-ID:
  <CA+dqh61Y+UOkSAzp1mE9frpGydXKLK8zJh6vPmsCaBA-9FHJzQ@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Both pcompos and pcomb mess with the HDR header. Also, what you are doing here:

echo "VIEW= -vta -vh 180 -vv 180 -vp 0 0 0 -vd 1 0 0 -vu 0 0 1" >
output_masked2.hdr

is overwrite HDR image output_masked2.hdr with just the view string.
You need to edit this image in a text editor and put a full VIEW= line
back in. If you're happy using vim, then you could try Radiance's
vinfo.

Regards

Axel

On 26 February 2014 15:33, Jonghoon Kim <[email protected]> wrote:

Dear list,

I am trying to glare analysis via HDR images captured by a canon DSLR Camera
and sigma fish eye lens.

The procedure that I use was

1. Taking 13 images via gphoto2 +Crontab

2. Creating HDR images in HDRgen

3. Resize
pfilt -x 1433 -y 955 Big.hdr > resize.hdr

4.Crop & cleaning mask
ra_xyze -r -o -u resize.hdr | pcompos -x 800 -y 800 - -315 -78 > crop.hdr |
pcomb -s -1000 output_masked2.hdr

5. Evalglare analysis
echo "VIEW= -vta -vh 180 -vv 180 -vp 0 0 0 -vd 1 0 0 -vu 0 0 1" >
output_masked2.hdr
evalglare output_masked2.hdr

The problem is that Evalglare reports errors after the crop process.

error: no valid view specified

(There was no evalglare errors when I test it with the resized image.)

I has checked the luminance values of the HDR in photosphere and it looks
OK!

Do I need to use another crop command for evalglare processing?

Please, let me know if you have any ideas.

Best regards,
Jonghoon Kim
Ph.D. student
Texas A&M University

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End of HDRI Digest, Vol 68, Issue 1
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