Photoshop for All: RE: [Adobe_Photoshop

Think about luminous (brightness level) histograms like this, it is
basically divided into three sections shadows, midtones, highlights. The
far left is shadows, the center is midtones, and the far right is
highlights. The shape and position of the levels shown in the histogram
will vary from photo to photo depending on the scene even if it is properly
exposed. The biggest things you want to look for is clipping of shadows or
highlights (a huge spike at the far left or right). There are a number of
tutorials out there on histograms and how to better understand them since
they can become quite confusing. Here is a link to a site I have found is
very good at explaining histograms.

http://www.luminous-landscape.com/tutorials/understanding-series/understandi
ng-histograms.shtml

From: Adobe_Photoshop_Techniques@yahoogroups.com
[mailto:Adobe_Photoshop_Techniques@yahoogroups.com] On Behalf Of andydzl
Sent: Wednesday, October 03, 2012 3:00 AM
To: Adobe_Photoshop_Techniques@yahoogroups.com
Subject: [Adobe_Photoshop_Techniques] Re: Historgram

You are right Ray, the histogram is simply showing what is there, probably
over 99% of the image is black or near black and that is what you were
looking at

Andy

> Thanks Clay, I'm sure to you it's quite obvious, can I take it that in
fact
> there's nothing wrong with the histogram and it's my inability to stretch
it
> and process it in Photoshop that is the issue.
>
> Ray
>
>
>
> From: Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> [mailto:Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com> ] On Behalf Of Clay
> Swatzell
> Sent: 18 September 2012 22:01
> To: Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> Subject: RE: [Adobe_Photoshop_Techniques] Historgram
>
>
>
>
>
> It would be because most of the photo is black.
>
> From: Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> <mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> [mailto:Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> <mailto:Adobe_Photoshop_Techniques%40yahoogroups.com> ] On Behalf Of Ray
> Sent: Tuesday, September 18, 2012 5:02 AM
> To: Adobe_Photoshop_Techniques@yahoogroups.com
<mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> <mailto:Adobe_Photoshop_Techniques%40yahoogroups.com>
> Subject: [Adobe_Photoshop_Techniques] Historgram
>
> Hi group, new to this forum, i need a little help understanding the
> historgram of my astro image (uploaded into the files section)
>
> the historgram puts all my data to the zero point and appears to be
clipping
> the data
> anyone know why this might be the case
>
> R
>
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