Re: Advice on "Matrix Metering" for Cams ?

From	rbowman <bowman@montana.com>
Newsgroups	comp.os.linux.misc
Subject	Re: Advice on "Matrix Metering" for Cams ?
Date	2025-05-04 08:16 +0000
Message-ID	<m7om3qFdg5qU1@mid.individual.net> (permalink)
References	<uhucnXb6KohhZIv1nZ2dnZfqn_GdnZ2d@giganews.com>

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On Sun, 4 May 2025 01:24:21 -0400, c186282 wrote:

> SO ... wrote a little app that breaks the images into a 7x5 matrix and
> yields 'average brightness'
> figures for each segment ... the basic of 'matrix metering'.

That's sort of like pooling in a convolutional neural network. The image 
is broken into 2x2 or similar and either the maximum or the average for 
the square is used for the next layer. It's interesting to look at the 
images after each iteration. It really sharpens lines and shapes that 
would be a smoother gradient in the original image and reduces the 
dimensions.

I don't know if successive iterations would yield something you could use 
to set contrast.

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Thread

Advice on "Matrix Metering" for Cams ? c186282 <c186282@nnada.net> - 2025-05-04 01:24 -0400
  Re: Advice on "Matrix Metering" for Cams ? rbowman <bowman@montana.com> - 2025-05-04 08:16 +0000
    Re: Advice on "Matrix Metering" for Cams ? c186282 <c186282@nnada.net> - 2025-05-04 22:12 -0400

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