superimpose image
Brian Cluff
brian at snaptek.com
Mon Jan 11 11:14:17 MST 2016
While you can use software to fake it, it doesn't give you the same
quality as you would get from 3 separate images shot at different F Stops.
The biggest difference you will see when using a single image is that
the darker parts of your fake HDR image will be very grainy/noisy and
there will also be some noise that spills over to the rest of the image.
You can do a lot better if your single image is a RAW image with it's
higher bit-depth instead of it's JPEG equivalent, but even then, without
the longer exposure time that you would get from using a larger F-stop
the data simply isn't there is be able to expand for HDR (really
tonemaped) images.
Brian Cluff
On 01/11/2016 09:48 AM, Michael Havens 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 <brian at snaptek.com
> <mailto:brian at 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 <brian at snaptek.com
> <mailto:brian at snaptek.com>
> <mailto:brian at snaptek.com <mailto:brian at 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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