Re: superimpose image

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Author: Brian Cluff
Date:  
To: Main PLUG discussion list
Subject: Re: superimpose image
Oops, I guess I should have read the whole thread before replying. I
could have saved myself a bunch of typing.

Brian Cluff

On 01/11/2016 10:14 AM, Stephen Partington wrote:
> Cameras are usually good for 50000-300000 actuations if not more (Ie
> mirrorless cameras)
>
> But the issue with using software to do the over/under expose of the
> image you loose the on site expanded dynamic range. Newer cameras can
> have some crazy dynamic range, but if you have an older camera or one
> that just doesn't have it Multiple exposures is about the only way to
> really get the data you need. and ideally you are doing this to expand
> you baseline, and extremes parts of the exposure.
>
> Doing this in software from the same image, even is you do have a raw
> image to work with you are still imited to +/- 5-7Ev in most cases. I
> think sony can push as far as 11 to 14 but i would need to check my
> sources.
>
> With set of images for HDR you move your EV to + and - 3-5 that then
> gives you a huge dynamic range to get details out of the brights and
> shadows.
>
> On Mon, Jan 11, 2016 at 9:48 AM, Michael Havens <
> <mailto:bmike1@gmail.com>> wrote:
>
>     I was wondering... would using software to over/under expose an
>     image be the same as taking 3 images which have been physically
>     altered? Less wear and tear on the camera is good!

>
>     Also, I was watching a tutorial on luminance hdr and in his
>     version the software had a bunch of variation of an hdr which
>     could be modified. My version doesn't seem to have that. Is there
>     a setting?

>
>     On Thu, Jan 7, 2016 at 9:58 PM, Brian Cluff <
>     <mailto:brian@snaptek.com>> wrote:

>
>         Use LuminanceHDR for exposure blending.  GIMP is waaaaaay too
>         much work to get just one way to blending the images. 
>         Luminance on the other hard offers a tons of different methods
>         and then you can tweak the settings within each method.  It's
>         all very easy and gives you much better results.

>
>         Brian Cluff

>
>         On 01/07/2016 05:51 PM, Michael Havens wrote:

>
>             thank you so much man. I really appreciate it. I
>             certaainly will devote
>             10% of my available   brain to these videos tomorrow. Do
>             you know of any
>             videos or text teaching how to do exposure blending with
>             gimp2.8? all
>             the tuts  I've been finding are incomplete or are how to
>             do it with 2.2!

>
>             On Thu, Jan 7, 2016 at 7:37 PM, Brian Cluff
>             < <mailto:brian@snaptek.com>
>             <mailto:brian@snaptek.com <mailto:brian@snaptek.com>>> wrote:

>
>                 There's a ton of ways to do what you want.  The
>             biggest thing you
>                 will have to worry about is lighting. For instance, if
>             you are
>                 putting something that was lit from the left into a
>             scene that was
>                 lit from the right, then there is little you can do.
>             No matter how
>                 carefully you add it to your scene your brain will
>             always tell you
>                 there is something wrong with the picture.

>
>                 I tend to use a couple of different techniques to put
>             one image into
>                 another.
>                 If the background is a relatively solid color, I'll
>             use a technique
>                 similar to this example for cutting out images while
>             preserving fine
>                 details (hair in this example)... hint, you don't use
>             ANY of the
>                 selection tools, or copy and past.
>             https://www.youtube.com/watch?v=AnbxtMCHKV0
>                 or
>             https://www.youtube.com/watch?v=Jle81ofRLok
>                 or
>             https://www.youtube.com/watch?v=quAChCnK_Dk

>
>                 The other way I like combine image is brushing out the
>             background
>                 using layer masks as demonstrated in this video with
>             the leg:
>             https://www.youtube.com/watch?v=hHJAJziWDs0

>
>                 I usually use a combination of the 2 techniques since
>             you rarely get
>                 perfect results with either method.

>
>                 All these methods ultimately use layer masks, which is
>             a much better
>                 way to combine photos than cutting and pasting since
>             you can tweak
>                 what is transparent or not back and both without
>             having to commit to
>                 a certain part of an image like you do with cutting
>             and pasting.

>
>                 Brian Cluff

>
>
>                 On 01/07/2016 02:58 PM, Michael Havens wrote:

>
>                     I found a way to super impose an image but it
>                 looks tacky.
>                     The method I learned was to open both files and
>                 then to select the
>                     image you want to put on the other with fuzzytool.
>                 I found that
>                     didn't work so I used the path tool. Well I cut
>                 the image out but
>                     the paste doesn't look good. It is out of scale.
>                 For the purposes
>                     I need WHat ithe best way to cut a house out and
>                 put it on a blue sky?

>
>                     --
>                     :-)~MIKE~(-:

>
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>
> --
> A mouse trap, placed on top of your alarm clock, will prevent you from
> rolling over and going back to sleep after you hit the snooze button.
>
> Stephen
>
>
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