This one is from 2015, drawn on a black cardboard with white tinted pen. Because of uneven lighting, the photo was originally bad quality, but finally edited it in RawTherapee by rising black level. The result tells for itself, the black background is perfect, the white lines are perfectly clear.

Inverted - also looks perfectly clear:

For a comparison, here is the original drawing:

Example for black level in RawTherapee: click on the image to see full resolution and find the red label on the right side! Move the slider and see the changes on the picture.

If you want to change unevenly lighted background to white, first invert it in Gimp or any other programs, then open it in RawTherapee and rise black level. Then invert it again in your photo editor.

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You can download RawTherapee for free here: http://rawtherapee.com. Very fast and it has many options to improve the quality of your photos (any formats, like RAW, jpg or png.), similarly to Adobe Lightroom. Also works under Linux and Mac!

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My older posts in this theme:

https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-20
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-19-flowers-of-the-earth
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-18-streetview-zentangle-from-1997
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-17-sprouts-from-the-earth
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-16-unusual-zentangle!
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-15
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-14-freehand-mandala-with-digital-variations
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-13-early-summer
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-12-tulip-life-tree-2
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-11-flame-lily
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-10-tulip-life-tree
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-9-the-spirit-of-the-forest
https://steemit.com/souldoodle/@kalemandra/my-souldoodles-from-the-closet-8-bee-orchid-for-colorvitamin-as-well
https://steemit.com/art/@kalemandra/my-souldoodles-from-the-closet-7-tree-fairy
https://steemit.com/art/@kalemandra/my-old-souldoodles-from-the-closet-6-unknown-script-from-the-last-millenium
https://steemit.com/art/@kalemandra/my-old-souldoodles-from-the-closet-5-flaming-dawn
https://steemit.com/treetuesday/@kalemandra/my-old-souldoodles-from-the-closet-4-tree-for-treetuesday
https://steemit.com/art/@kalemandra/my-old-souldoodles-from-the-closet-3-emanation-of-beingness
https://steemit.com/art/@kalemandra/my-experimental-art-upcycled-art-digital-collage
https://steemit.com/art/@kalemandra/my-old-drawings-from-the-closet-2-mandorla-with-tulips
https://steemit.com/art/@kalemandra/my-old-souldoodles-from-the-closet-love-mandorla

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Welcome to Visualization Challenge - Prolonged till Sunday! - #colortheline4!

Welcome to my InspirationChallenge #3/2018!

Áldás!♥♥♥Blessings!♥♥♥Namaste!♥♥♥Aloha!