superimpose image
Stephen Partington
cryptworks at gmail.com
Mon Jan 11 10:14:29 MST 2016
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 <bmike1 at 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 <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>> 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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>>>
>>>
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>>>
>>>
>>> --
>>> :-)~MIKE~(-:
>>>
>>>
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>
>
>
> --
> :-)~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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