Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Olympus Micro Four Thirds

Thread Tools Search this Thread
Old Mar 22, 2013, 10:40 AM   #1
Senior Member
Join Date: Sep 2010
Location: oakville, on
Posts: 491
Default EXIF terms and questions

1/ Gain Control
reports as either "off" or "low gain up" while looking at a series of bracketed images. Is this the Noise control?
2/ CFA pattern
reports as 2 x 2R G G B -- continuous focus?
3/ Image data arranger
reports as (my favourite) "chunky format"

I was looking at a number shots saved as RAW through the mac's preview app that has a good exif display. (Pity mac does not have the same amount of info with iPhoto). This is where I first noticed the Gain Control. I then opened Oly Viewer 2 to look at the official exif and found puzzlers 2 and 3.

The manual has nothing to say about these and the FAQ on the web declines to illuminate the subjects. Looked first at the E-PL1, then the E-PL5, then on to the E-M5 FAQs. Idle curiosity rather than a real need to know...
KulaCube is offline   Reply With Quote
Sponsored Links
Old Mar 22, 2013, 10:55 AM   #2
Senior Member
Join Date: Dec 2011
Location: Beaver, PA
Posts: 845

Number 2 sounds like the arrangement of the colors in the pixels (2 green 1 red 1 blue).


If that's what you mean?

EDIT, not "pixels" I guess.
SammyKhalifa is offline   Reply With Quote
Old Mar 22, 2013, 6:06 PM   #3
Senior Member
Join Date: Sep 2010
Location: oakville, on
Posts: 491

Thanks Sam.

CFA appears to be as you indicated, for describing the arrangement of the photo sites in the image sensor. And that leads to puzzler 3, Chunky Format.

Chunky format describes how the data from the sensor is then stored. All of the information necessary for displaying one pixel is in a single contiguous "chunk". The RBG image data is stored as RBGRBGRBG. Chunky format came about with more powerful cpu's. The older powerhouses of yesteryear had to store images in a Planar format where the components are stored in separate component planes. For example, RGB data is stored with the Red components in one component plane, the Green in another, and the Blue in another. Oooooh.

Now to figure out Gain Control.

This is what happens when waiting for clients to get back to you...
KulaCube is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 11:34 AM.