Revision as of 10:23, 9 July 2007

This is a test jump into HDR photography. Hopefully it develops as I learn more, but it was so interesting I just took a leap at it.

Faux HDR

First off, I cheated at this. I took 1 picture (which wasn't really a great picture to begin with) and manually manipulated the colors to over & under expose. For the first test I wanted to see the merge results.

Underexposed

Original

Overexposed

The results were rich in color. I shifted between 2 exposure spaces and the latter of the two was the richest.
Having seen the combined difference, I'll work on learning on the Powershot S3 how to manipulate the over/under exposure and see what a true light picture results with.

Combined - 2 Stops

Combined - 4 Stops

Flower Pot

Flower pot on Porch. I took this a few hours after the faux test. Much better
Pictures one and two are cropped sections of the flower pot. Note the detail in the HDR version.
Picture three is the full HDR picture
Picture four is a combination of all of the exposures (marked) and a grayscale strip to show the differences.

Original - Cropped

HDR Cropped

HDR Full

Exposure Ranges

Tower

21 pictures ranging in exposures
Noted that there is a need to drop overly exposed pictures (95% white) from the batch

Original

HDR

River

17 pictures ranging in exposures

File:Hdrtest-river-original.jpg

HDR

Dining Room Light

qtpfsgui

Tests usings Automatic Exposure Bracketing (AEB) on the Powershot S3 with -2/0/+2 exposure range. Subject is my dining room light. Tone mapping done via qtpfsgui with the following settings for the first image:

TMOSETTINGSVERSION=0.2
TMO=Fattal02
ALPHA=1.048
BETA=0.856
COLOR=1.33
PREGAMMA=1.485

TMOSETTINGSVERSION=0.2
TMO=Fattal02
ALPHA=0.1
BETA=0.8
COLOR=1
PREGAMMA=1

The Float

Recent shot from Round Pond in Plymouth ME. Same tone map as the tower & river shots from above. I actually get frustrated with qtpfsgui in that the displays at different resolutions when you are testing out tonemaps varies and even if it looks good at 240x120, the map result at 1024x768 is extremely different, especially in the artifacts & noise area.

Programs

HDR Shop - V1 is free for non-commercial
Photomatix - The older version is free (no tone tools)
- Apparently no alignment options
Photoshop C2 or higher
qtpfsgui
Artizen - Save to .hdr for use with other programs (no branding)

References

@@ Line 54: / Line 54: @@
 COLOR=1
 PREGAMMA=1</pre>
+=The Float=
+{{Frame1|Image:TheFloat.jpg|The Float}}
+Recent shot from Round Pond in Plymouth ME.  Same tone map as the tower & river shots from above.  I actually get frustrated with qtpfsgui in that the displays at different resolutions when you are testing out tonemaps varies and even if it looks good at 240x120, the map result at 1024x768 is extremely different, especially in the artifacts & noise area.
 =Programs=
 * [http://www.hdrshop.com/ HDR Shop] - V1 is free for non-commercial

HDR Photography: Difference between revisions

From Mike Beane's Blog