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On Oct 4, 2012, at 11:15 AM, Adobe_Photoshop_Techniques@yahoogroups.com wrote:
> There are 3 messages in this issue.
>
> Topics in this digest:
>
> 1. Re: Histogram
> From: Clay Swatzell
>
> 2a. Re: Historgram
> From: Writing With Light Photography (615) 500-
> 2b. Re: Historgram
> From: Ray Leeson
>
>
> Messages
> __________________________________________________________
> 1. Re: Histogram
> Posted by: "Clay Swatzell" photoguyinmo@gmail.com photoguyinmo@ymail.com
> Date: Wed Oct 3, 2012 11:27 am ((PDT))
>
> 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
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
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>
>
>
> [Non-text portions of this message have been removed]
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>
> Messages in this topic (1)
> __________________________________________________________
> __________________________________________________________
> 2a. Re: Historgram
> Posted by: "Writing With Light Photography (615) 500-" dallas@wwlphotos.com wwl.photo
> Date: Wed Oct 3, 2012 11:27 am ((PDT))
>
> @Ray...
>
> I don't think you fully understand the purpose/function of the histogram,
> maybe this will help. The histogram is a reflection of the image based on
> the blacks & whites in the image but it is not something that you can change
> directly. When you make changes to the image those changes are reflected in
> the image.
>
>
>
> I did not view the image but if there is some clipping it means there is an
> over abundance of black or white in the photo & that means your camera
> settings were off and you either had too much light on the some part of the
> photo or you did not have enough light on part of the photo. The most
> effective use of the histogram (to me) comes in the image capture/creation
> phase, especially in stills & studio work however it has some benefits in
> the editing process as well. There are a lot of tut's on this subject out
> there & I would recommend viewing a few to determine how you can use it
> going forward. If you want to address the clipping issue now, I would
> recommend the curves tool or the levels tool in photoshop.
>
>
>
> Dallas P. Allbritton
>
> Writing With Light Photography Services
>
> http://www.wwlphotos.com
>
>
>
> From: Adobe_Photoshop_Techniques@yahoogroups.com
> [mailto:Adobe_Photoshop_Techniques@yahoogroups.com] On Behalf Of Ray Leeson
> Sent: Wednesday, September 19, 2012 4:26 AM
> To: Adobe_Photoshop_Techniques@yahoogroups.com
> Subject: RE: [Adobe_Photoshop_Techniques] Historgram
>
>
>
>
>
> 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
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>
> No virus found in this message.
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> _____
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> Version: 2012.0.2221 / Virus Database: 2441/5305 - Release Date: 10/02/12
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> [Non-text portions of this message have been removed]
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>
>
>
>
> Messages in this topic (6)
> __________________________________________________________
> 2b. Re: Historgram
> Posted by: "Ray Leeson" rayleeson@lineone.net bookertec
> Date: Wed Oct 3, 2012 11:27 am ((PDT))
>
> Thank you for that Andy
>
>
>
> Ray
>
>
>
> From: Adobe_Photoshop_Techniques@yahoogroups.com
> [mailto:Adobe_Photoshop_Techniques@yahoogroups.com] On Behalf Of andydzl
> Sent: 03 October 2012 09:00
> 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
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
> Messages in this topic (6)
>
>
>
>
>
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