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smooth out colours
#1
the colours transitions looks like a staircase or height curves on a map. how would i go about to smooth out the colours? http://prnt.sc/eslewq i just want this to be a smooth transition. if there is no automated function or script or whatever i dont care, il do it manually then with one of the brush tools. the image im working with is quite huge its 8160*26144, so the picture in the link is like 1000*1000 pixels of my image, so i have allot of pixels to work with so i can use as much different colours as the program can handle in order to smooth it out.
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#2
I do not know about anyone else but that link to an image does not show here. Captured with lightshot - what is that?

Try posting the sample on imgur perhaps.

Are you really using WinXP? - that is what your profile says. Os and version of Gimp please.

The Standard Gimp is 8 bit and gradients can show as 'steps' but only usually noticeable when some operation - colour curves or switching from RGB to Indexed and back is performed.

More details of your procedure(s) please.
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#3
There is something there rich, it's just very dark:

   

I tend to think that it's run out of dynamic range as all the colours are compressed into a range of darkness.
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#4
(04-05-2017, 08:26 AM)Kevin Wrote: There is something there rich, it's just very dark:



I tend to think that it's run out of dynamic range as all the colours are compressed into a range of darkness.

Thanks Kevin, brings a whole new meaning to working in the dark Wink

@tekett

You could try applying a small gaussian blur but how do you determine the effect, except by trial and error.

Suggestions: The development version, currently Gimp 2.9.5 can use higher bit depths 16 and 32 which might help initially but eventually you will probably have to export back to 8.

FWIW, a comparison here after applying a blur on the 'black' image using Gimp 2.9.5 with 32 bit depth. Then opened in Gimp 2.8 and used a color curve similar to Kevins example curve. http://i.imgur.com/QYjSGBB.png
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#5
(04-05-2017, 07:45 AM)rich2005 Wrote: I do not know about anyone else but that link to an image does not show here. Captured with lightshot - what is that?

Try posting the sample on imgur perhaps.

Are you really using WinXP? - that is what your profile says. Os and version of Gimp please.

The Standard Gimp is 8 bit and gradients can show as 'steps' but only usually noticeable when some operation - colour curves or switching from RGB to Indexed and back is performed.

More details of your procedure(s) please.

im running win10, i must have miss clicked, and gimp 2.8.16
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#6
(04-05-2017, 08:26 AM)Kevin Wrote: There is something there rich, it's just very dark:



I tend to think that it's run out of dynamic range as all the colours are compressed into a range of darkness.

that might be because its a screenshot, see if this is any different http://imgur.com/a/P7WbO
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#7
(04-06-2017, 03:15 PM)tekett Wrote:
(04-05-2017, 08:26 AM)Kevin Wrote: There is something there rich, it's just very dark:

I tend to think that it's run out of dynamic range as all the colours are compressed into a range of darkness.

that might be because its a screenshot, see if this is any different http://imgur.com/a/P7WbO

It is still a bit on the dark side so for the sake of this post I lightened it a bit.

First more information. Do you want to adjust all of the image, including the 'hard' details or just the larger areas of colour?

This example http://i.imgur.com/rci6qnI.jpg with the green area colour selected and blurred (left side) leaving the details unchanged.

or is it something else. No great variations / steps / ramps / in colour that I can see from your image.

You could use a Gimp 2.9.5 from http://www.partha.com which gives an on-canvas view of changes in progress.
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#8
(04-06-2017, 03:59 PM)rich2005 Wrote:
(04-06-2017, 03:15 PM)tekett Wrote:
(04-05-2017, 08:26 AM)Kevin Wrote: There is something there rich, it's just very dark:

I tend to think that it's run out of dynamic range as all the colours are compressed into a range of darkness.

that might be because its a screenshot, see if this is any different http://imgur.com/a/P7WbO

It is still a bit on the dark side so for the sake of this post I lightened it a bit.

First more information. Do you want to adjust all of the image, including the 'hard' details or just the larger areas of colour?

This example http://i.imgur.com/rci6qnI.jpg with the green area colour selected and blurred (left side) leaving the details unchanged.

or is it something else. No great variations / steps / ramps / in colour that I can see from your image.

You could use a Gimp 2.9.5 from http://www.partha.com which gives an on-canvas view of changes in progress.
i might have found out why this looks like it does, i dont know what caused it but i know why it looks like it does, its easiest to see at dark colours http://prntscr.com/etd9kr just stare at it long enough, and move your head to look at your screen in different perspectives and you can clearly see how its green and purple colours amiss the brown. here is it exported if you want to do your own tests http://imgur.com/a/2kS4t

il check out the gimp you linked

its not like i have drawn the picture im just editing a picture
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#9
Looking at the Histogram (in "RGB" mode) there are very few color values involved. The range for the blue channel is 5, and the range of the green and red channels is 7-8. Color>Info>Colorcube analysis confirms that there are only 21 colors in the image (outside of the numbers). So, yes, it is normal to have visible transitions, and it is also normal to have visible hue changes because since you are dealing with low values, a change of one unit is important.
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#10
Necro as this is still a problem and ppl dont seam to understand what im talking about, the problem isnt that the transitions are visible, the problem is that the transitions even tho its going from lighter to darker is not perfect transition and have different shades and completely different colours sometimes in between rather the just going to the next shade, 132435 instead of 12345

(i have no real idea if its shades or colours, since the colour is affected by the shade but its the shading which is the problem, so i just viewed all of this as base colour and the different shades was due to the shading, which might be wrong since in some images the colours repeat even when the tone of the image changes (last 3 pictures), which all makes this confusing in itself)

High contrast (not sure if you can actually use my pictures for self study as they are screenshots)


[Image: EDIagkh8RnGIsu-zAaqDLw.png]
After studying other pictures across the internet, iv noticed it look more like shading then actual colours, like there is shading ontop of shading ontop of shading, rather then different colours. So when two shadings overlap it gets darker. 

Which is quite obvious at a smaller size of the same picture as above. 

High contrast
[Image: hpbfCckkQmquDv8wUhhQ1Q.png]

I think it looks like this is because there are different shadings from different directions that are mixing. Im not good at explaining bool mathematics but that's basically what it is, one shading is added to the other shading but they also decrees as they go along. 

Like if you have one shade going from the top and one from the left, the top-left most pixel is going to be the darkest, and the bottom-right most pixel the brightest. and now you make the shaders not square, or just towards each other and one of them is shifted, and they start to do unexpected stuff, like creating lightspots since one of the shadings lower in value before the other etc. 

The left of the picture above is a example of 4 shadings overlapping. One is the dark spot on the left which dies out rather quick, one is in the same place but goes a little higher and more vertical, one from the top that covers pretty much everything, and one that starts in the middle of the picture and goes from the top right to the bottom left and dies out very quick, dropping value only 3 times (4 shades). And this is only in this screen cap alone, these could continue across the whole picture mixing with other shaders. Like how smaller functions form a larger one.

What is causing this in the first place i dont know, since iv checked a few formats and from different places, and its all the same.

some images behave differently, as said in the beginning, here is a screen cap of a picture which just go from light blue to darker blue
[Image: mOJ-TdmrSdmraPwsm97YCg.png]

Here its the same but with high contrast
[Image: 14_fG-rQQYeKstHJvLrAUA.png]

and with one of the colours selected
[Image: R-phyARvSdag2DH_EinglA.png]
There is no reason why there should be this much of the same colour, when it's supposed to change colour.

This might just be because of the algorithm of how you store a image, and might go unnoticed by the masses, but as some one who care about detail its extremely annoying and ruins pretty much every image.
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