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+--- Thread: Grayscale Image Creation (Not Converting) (/Thread-Grayscale-Image-Creation-Not-Converting)
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RE: Grayscale Image Creation (Not Converting) - cli345 - 04-30-2021
Yes, I started with the color image.
I made it this way:
- Duplicate Layer
- On lower layer
- Convert image : Image -> Precision -> 32 bits integer
- G'MIC -> Repair -> Smooth [NL-means]
- New Layer filled with yellow (255,255,0), mode "multiply", merge down
- Colors -> Desaturate -> Color to gray
- G'MIC -> Repair -> Smooth [NL-means]
- Colors -> Curves : add point (224, 128) and point (64, 0)
- G'MIC -> Details -> Local Contrast Enhancement (amount=0.1)
- Convert image : Image -> Precision -> 32 bits integer
- On upper layer
- Filters -> Artistic -> Comic Book for 2.10
- G'MIC -> Colors -> Curves (Colorspace=Lch) : lower Chroma to 0 everywhere, add a point (32,255) on Lightness
- set opacity to 75%
- set mode to "multiply"
- Filters -> Artistic -> Comic Book for 2.10
- merge down
- Reduce by 50%
RE: Grayscale Image Creation (Not Converting) - AdriNat - 04-30-2021
(04-30-2021, 09:07 PM)cli345 Wrote: Yes, I started with the color image.
I made it this way:
- Duplicate Layer
- On lower layer
- Convert image : Image -> Precision -> 32 bits integer
- G'MIC -> Repair -> Smooth [NL-means]
- New Layer filled with yellow (255,255,0), mode "multiply", merge down
- Colors -> Desaturate -> Color to gray
- G'MIC -> Repair -> Smooth [NL-means]
- Colors -> Curves : add point (224, 128) and point (64, 0)
- G'MIC -> Details -> Local Contrast Enhancement (amount=0.1)
- On upper layer
- Filters -> Artistic -> Comic Book for 2.10
- G'MIC -> Colors -> Curves (Colorspace=Lch) : lower Chroma to 0 everywhere, add a point (32,255) on Lightness
- set opacity to 75%
- set mode to "multiply"
- merge down
- Reduce by 50%
Just Wow. how do you get all this information to go in one image. I think I cannot follow even following. I will try it tomorrow and let you know my results. Very impressed, thanks for sharing.
RE: Grayscale Image Creation (Not Converting) - rich2005 - 05-01-2021
Very easy to get tied up in knots. Gimp (and the plugin g'mic) can be complicated and frustrating for a new user.
Try this, more as practice than anything else. Uses two gmic filters, poster-edges and simulate-film
https://youtu.be/-ypT1BaoulE duration 3 minutes.
...however..back the the original proviso, not going to be easy with a regular photograph.
RE: Grayscale Image Creation (Not Converting) - AdriNat - 05-01-2021
(05-01-2021, 09:53 AM)rich2005 Wrote: Very easy to get tied up in knots. Gimp (and the plugin g'mic) can be complicated and frustrating for a new user.
Try this, more as practice than anything else. Uses two gmic filters, poster-edges and simulate-film
https://youtu.be/-ypT1BaoulE duration 3 minutes.
...however..back the the original proviso, not going to be easy with a regular photograph.
Thanks again rich2005, Sure an easier way for a newbie like me. Like you said a little retouching here and there will get to the point i would like it... Some where in the middle between your steps and cli345 will get there. I will continue trying and learning. Appreciate your video very much.
RE: Grayscale Image Creation (Not Converting) - denzjos - 05-01-2021
I tried to use only the gimp tools to convert the photo (se also pictures) :
- load the photo in gimp
- make a copy from the layer
- gimp menu : Filters/Artistic (Mask radius 50 / Percent black 0.025)
- gimp menu : Colours/Desaturate/Desaturate
- rename the desaturated layer 'desaturate'
- copy de desaturated layer
- gimp menu : Colours/Invert (photo becomes white)
- on this layer set layer mode 'Dodge'
- gimp menu : Filters/Blur/Gaussian blur (value 2 - contours appear on the layer)
- gimp menu : Colours/Curves (move point under-left to the right (see picture)
[attachment=5953]
- make new layer from visible (left mouse button - new from visible)
- copy the 'desaturate' named layer
- put this layer under the new from visible layer
- set the layer mode to 'multiply'
Done
[attachment=5954]
RE: Grayscale Image Creation (Not Converting) - AdriNat - 05-01-2021
(05-01-2021, 03:54 PM)denzjos Wrote: I tried to use only the gimp tools to convert the photo (se also pictures) :
- load the photo in gimp
- make a copy from the layer
- gimp menu : Filters/Artistic (Mask radius 50 / Percent black 0.025)
- gimp menu : Colours/Desaturate/Desaturate
- rename the desaturated layer 'desaturate'
- copy de desaturated layer
- gimp menu : Colours/Invert (photo becomes white)
- on this layer set layer mode 'Dodge'
- gimp menu : Filters/Blur/Gaussian blur (value 2 - contours appear on the layer)
- gimp menu : Colours/Curves (move point under-left to the right (see picture)
- make new layer from visible (left mouse button - new from visible)
- copy the 'desaturate' named layer
- put this layer under the new from visible layer
- set the layer mode to 'multiply'
Done
Thanks, denzjos. So many approaches, I have a lot to learn... nothing is straight forward here. Your final output is also VERY GOOD. One question / comment... The background of the original B&W picture needs to be retouched separately wright, I assume is impossible to have everything done in "one pass"?
Thanks for helping.
RE: Grayscale Image Creation (Not Converting) - denzjos - 05-01-2021
There is a way to do it in one take but one have to put the manipulations in 'bimp' (https://alessandrofrancesconi.it/projects/bimp/) or one have to make a script.
RE: Grayscale Image Creation (Not Converting) - AdriNat - 05-01-2021
(05-01-2021, 05:30 PM)denzjos Wrote: There is a way to do it in one take but one have to put the manipulations in 'bimp' (https://alessandrofrancesconi.it/projects/bimp/) or one have to make a script.
Thanks again denzjos, will take a look into it.
RE: Grayscale Image Creation (Not Converting) - Krikor - 05-02-2021
(04-30-2021, 08:53 PM)AdriNat Wrote: Sure you have a clue you are also in the ballpark like cli345. Has it been to difficult? what was your method this time if you dont mind telling? And thanks again for your effort.1- I applied a slight S-curve - Colors-Curves;
2- Colors - Dessaturate - Color to Gray;
3- G'MIC - Simple local contrast;
4- Colors - move the curve from the central point to the right (or to the left) until the satisfactory result is obtained (darker or lighter);
[attachment=5956][attachment=5957]
5- Filters - Enhance - Sharp (unsharp Mask) is optional.
In the results shown above, another option is to apply [G'MIC] Smooth Abstract to a new layer in multiply mode.[attachment=5958]