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List: kde-kimageshop
Subject: Re: Floating point color in Krita
From: "Mikhail Lyossin" <mlesin () gmail ! com>
Date: 2006-11-17 17:00:19
Message-ID: 106113e30611170900v694cf738ud184d37e46cbe315 () mail ! gmail ! com
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Also I want to ask about floating point info in filters API - is it there?
I'm asking because I'm getting warnings about space convertions for almost
every filter I am trying to use in 32bit float mode. It is not what I want,
because 32bit RGB have much much wider gamut then any of other colorspaces
introduced, and, in case of any conversion I'm risking to loose some
important data which would fall out of gamut of intermediate colorspace -
that's not what I am really expect from the best image editing app ;)
On 11/17/06, Mikhail Lyossin <mlesin@gmail.com> wrote:
>
> Hi there,
>
> I've found that Krita is working with floating point image formats, I was
> amazed it does it in a true linear space with a tone mapping to see it on
> computer display (that's a good point).
>
> * But I was surprised when I see that numbers in color selector are still
> like I work with 8-bit image, i.e. integer 0-255 range, without any
> ability to move out of that range...
> I was expected to see there something like 0.0-1.0 floating point range,
> with ability to set values more then that, like 2.50, 3.12, 10.85 etc.. Is
> that planned to change in a future releases?
>
> * Also, some susggestions about tonemapping (exposure and gamma control)
> - It should apply to every color we see in Krita, at least for every color
> that interacts with the image is beeing edited. For example, if I paint
> something in out-of-the-range region (like in 2.0-4.0), I prefer to set
> exposure to -2..-3 f-stops, and I expect exposure to be applied not only in
> the main image area, but also in color selector area, in all plugins preview
> areas and so on.
>
> --
> WBW, Mike
>
> P.S. I am working as a technical director in a company that produces
> visual effects for a movies, and we are glad to see Krita advances in a
> directions we really need (floating point image editor working in a linear
> space). So please keep up good work, and we will try to help you as much as
> we can.
>
>
[Attachment #5 (text/html)]
Also I want to ask about floating point info in filters API - is it there? <br>I'm \
asking because I'm getting warnings about space convertions for almost every filter I \
am trying to use in 32bit float mode. It is not what I want, because 32bit RGB have \
much much wider gamut then any of other colorspaces introduced, and, in case of any \
conversion I'm risking to loose some important data which would fall out of gamut of \
intermediate colorspace - that's not what I am really expect from the best image \
editing app ;) <br><br><div><span class="gmail_quote">On 11/17/06, <b \
class="gmail_sendername">Mikhail Lyossin</b> <<a \
href="mailto:mlesin@gmail.com">mlesin@gmail.com</a>> wrote:</span><blockquote \
class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt \
0pt 0.8ex; padding-left: 1ex;"> Hi there,<br><br>I've found that Krita is working \
with floating point image formats, I was amazed it does it in a true linear space \
with a tone mapping to see it on computer display (that's a good \
point).<br><br> * But I was surprised when I see that numbers in color selector \
are still like I work with 8-bit image, i.e. integer 0-255 range, without any \
ability to move out of that range...<br>I was expected to see there something like \
0.0-1.0 floating point range, with ability to set values more then that, like 2.50, \
3.12, 10.85 etc.. Is that planned to change in a future releases? <br><br> * \
Also, some susggestions about tonemapping (exposure and gamma control) - It should \
apply to every color we see in Krita, at least for every color that interacts with \
the image is beeing edited. For example, if I paint something in out-of-the-range \
region (like in 2.0-4.0), I prefer to set exposure to -2..-3 f-stops, and I expect \
exposure to be applied not only in the main image area, but also in color selector \
area, in all plugins preview areas and so on.<br><span \
class="sg"><br>
--<br>WBW, Mike<br></span>
<br>P.S. I am working as a technical director in a company that produces visual \
effects for a movies, and we are glad to see Krita advances in a directions we really \
need (floating point image editor working in a linear space). So please keep up good \
work, and we will try to help you as much as we can. <br><br>
</blockquote></div><br>
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