JP4 HDR: Difference between revisions
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== JP4 HDR == | == HDR JP4 == | ||
Bayer pattern look like this | |||
{| class="wikitable" | |||
|- | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
|- | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
|- | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
|- | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
|- | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
| bgcolor="red"|R | |||
| bgcolor="green"|G1 | |||
|- | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
| bgcolor="green"|G2 | |||
| bgcolor="blue"|B | |||
|} | |||
Some sensors have possibility to set independed scale to G1 and G2. | |||
Considering that the accessible optics does not give the full permission of a sensor resolution, it can be used for increase in a dynamic range of a image sensor. | |||
{| border="0" cellpadding="2" | |||
|- | |||
| [[Image:Hdr02 all gain1.jpeg|thumb|150px nonHDR image with global analog gain=1]] || [[Image:Hdr02 all gain16.jpeg|thumb|150px nonHDR image with global analog gain=16]] || [[Image:Hdr02.jpeg|thumb|150px HDR source image with gained G2]] || [[Image:Hdr02 processed.jpg|thumb|150px processed HDR image]] | |||
|- | |||
|} | |||
Matlab have interesting [http://www.mathworks.com/access/helpdesk/help/toolbox/images/makehdr.html possibility] for creating HDR from series of LDR images. | |||
We can easy make script for online & one click make HDR from series of images with different exposure times. | |||
=== Reference: === | |||
* [http://pfstools.sourceforge.net/index.html pfsTools] | |||
* [http://scanline.ca/exrtools exrTools] | |||
* [http://cvtool.sourceforge.net/index.html cvTool: GPU accelerated tools] | |||
* Tone Mapping [http://www.mpi-inf.mpg.de/resources/tmo algos]. With image/video samples. | |||
* [http://www.mpi-inf.mpg.de/resources/tmo/NewExperiment/TmoOverview.html Gallery of Reference Tone Mapped Images] | |||
---- | |||
* [http://www.stuckincustoms.com/ nice HDR blog] | |||
Latest revision as of 18:34, 3 May 2009
HDR JP4
Bayer pattern look like this
| R | G1 | R | G1 | R | G1 |
| G2 | B | G2 | B | G2 | B |
| R | G1 | R | G1 | R | G1 |
| G2 | B | G2 | B | G2 | B |
| R | G1 | R | G1 | R | G1 |
| G2 | B | G2 | B | G2 | B |
Some sensors have possibility to set independed scale to G1 and G2. Considering that the accessible optics does not give the full permission of a sensor resolution, it can be used for increase in a dynamic range of a image sensor.
 |
 |
 |
 |
Matlab have interesting possibility for creating HDR from series of LDR images.
We can easy make script for online & one click make HDR from series of images with different exposure times.
Reference:
- pfsTools
- exrTools
- cvTool: GPU accelerated tools
- Tone Mapping algos. With image/video samples.
- Gallery of Reference Tone Mapped Images