one fing leads . . .
 

Experiments with Tone Ranges
Re-colour an image according to different brightness levels. Seven brightness levels can be set to a specified hue and opacity. Purpose is to simulate something of a dyeing process on an image, and see what results.
Select picture
or
or specify image url apply
 will be converted to 800px on longer side – see copyright notice
 
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Background
photo
transparent
texture
paper texture 1 Paper Texture 1
paper texture 2 Paper Texture 2
paper texture 3 Paper Texture 3
paper texture 4 Paper Texture 4
canvas texture 1 Canvas Texture 1
canvas texture 2 Canvas Texture 2
canvas texture 3 Canvas Texture 3
canvas texture 4 Canvas Texture 4
 texture and background colour will only be apparent on elements with less than 100% opacity
colour:
 
         brightness:
 
replace colour where pixel brightness is 0 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 49
 
replace colour where pixel brightness is 50 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 99
 
replace colour where pixel brightness is 100 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 149
 
replace colour where pixel brightness is 150 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 199
 
replace colour where pixel brightness is 200 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 255
 
replace colour where pixel brightness is 255 to
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 255
 
replace colour where pixel brightness is 255 to 255
 
use pixel brightness as opacity level, or: inverse, or:
Opacity %
         brightness: set to 255
 
Remember settings for next time
Formula for calculating brightness:
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more experiments for the sake of my dreams