What is AGC in Image Processing (Expand Luminance Range 0 to 255)

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Fabio Corres
Fabio Corres 2017-3-18
评论： Walter Roberson 2017-3-19
Hey there,
When i was working on some hdr algorithm i see an argument named AGC. It explains in article such as(starts with Finally..) :
I search it on internet and i see something about speech processing but i think it is about on luminance range as article says too. Here is my algorithm (I have an image named Yhdr) :
Can anyone answer the what is AGC
Thanks

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回答（2 个）

Walter Roberson
Walter Roberson 2017-3-19
It is Automatic Gain Control, the same expression used in sound processing.
http://ieeexplore.ieee.org/document/6152438/?reload=true
  2 个评论
Fabio Corres
Fabio Corres 2017-3-19
This article so complicated for me and i can't see any relation between sound processing :(. Can u help me to code it.
I just want to simple block. Give the function my image and output will be expand
Walter Roberson
Walter Roberson 2017-3-19
Different fields use the same term for related concepts. Consider for example that you can "grow" a fruit or "grow" a crystal without the two meaning exactly the same things.
There is no existing block in Simulink or MATLAB to do the kind of automatic gain control being referred to for HDR. I do not seem to have enough enthusiasm to read the article and understand it and program it for you.

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Image Analyst
Image Analyst 2017-3-19
You might want to check out the function imadjust().
Or check out the Gamma FAQ and Color FAQ

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