superimpose image
Brian Cluff
brian at snaptek.com
Mon Jan 11 11:18:31 MST 2016
Yeah, your right... that's what I meant, and what I do.... Brain fart!
Brian Cluff
On 01/11/2016 11:15 AM, Stephen Partington wrote:
> Careful about using multiple F-Stops. it can alter your depth of field
> and give you really weird hazing. it is usually better to alter
> shutter speed if anything. so the depth of feild and ISO noise is the
> same.
>
> On Mon, Jan 11, 2016 at 11:14 AM, Brian Cluff <brian at snaptek.com
> <mailto:brian at snaptek.com>> wrote:
>
> 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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> --
> 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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