Mosaics : 312


Building / Mosaics / 312

Error Diffusion Dithering in LEGO (ministeck) mosaics —Maarten Steurbaut

Before I started writing a program to create mosaics from my own pictures, I needed lots of information on "how to reduce the colour palette of an image to a custom colour palette". I started searching on Google with simple keywords "colour palette" (...) (20 years ago, 13-Jan-05, to lugnet.build.mosaic, FTX)

Re: Error Diffusion Dithering in LEGO (ministeck) mosaics —Bob Kojima

i must admit that i am not an expert at dithering. i have made improvements to Briksaic so it gives more accurate results. i took the CameronDiaz picture and ran it through Bricksaic to compare the results with Maarten's results. Though they are not (...) (20 years ago, 13-Jan-05, to lugnet.build.mosaic, FTX)

Re: Error Diffusion Dithering in LEGO (ministeck) mosaics —Maarten Steurbaut

I forgot to make one very important remark: Not everybody uses the same RGB colour values: this may lead to entirely different results, even if the same algorythm was used. Sometimes it seems better to alter the RGB values slightly. I thought of (...) (20 years ago, 13-Jan-05, to lugnet.build.mosaic)

Re: Error Diffusion Dithering in LEGO (ministeck) mosaics —Corey Sanders

Dither... schmither... :) (...) You talkin' to ME?! :) Just for fun, I took that image and converted it to mosaic form with the techniques I've been experimenting with. Instead of limiting the colors to the ones you did, I limited the colors to the (...) (20 years ago, 1-Feb-05, to lugnet.build.mosaic, FTX)

Re: Error Diffusion Dithering in LEGO (ministeck) mosaics —Maarten Steurbaut

(...) Just for fun, I downloaded your image and tried to find the colours you used, and I came up with the following list: pink, tan, earth orange, orange, white, medium blue, light yellow, light grey, grey, dark grey, sand green, dark orange, (...) (20 years ago, 1-Feb-05, to lugnet.build.mosaic)

Re: Error Diffusion Dithering in LEGO (ministeck) mosaics —Corey Sanders

(...) Here are the colors I used: black, blue, brown, dark gray, dark orange, dark red, gray, green, lime, very light gray, light yellow, medium blue, orange, red, sand blue, sand green, tan, white, yellow, dark blue, pink, and medium orange. I (...) (20 years ago, 2-Feb-05, to lugnet.build.mosaic)

Comparing techniques (Error Diffusion Dithering) —Maarten Steurbaut

(...) Indeed, the more colours you use, the smoother the image will be. But not everybody has that many colours at his disposal. (...) Isn't that inside information of TLG? Where did you find this information? I contacted TLG about it, but never got (...) (20 years ago, 10-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Steve Bliss

(...) Because nothing is truly without color; there are things darker than lego black. Also, using a slightly-less-than-t...ally-black shade allows outlines to be drawn with RGB(0,0,0) and still show up (at least, somewhat). And with shading (...) (20 years ago, 10-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Dave Schuler

(...) Oooh! Now that's a sentence with wonderfully ominous potential. Bulwer-Lytton awards, anyone? Dave! (20 years ago, 10-Feb-05, to lugnet.build.mosaic, FTX)

Bulwer-Lytton Entries —John Neal

(...) "Morning dawned like it always did; dark at first, but getting brighter every minute." JOHN (20 years ago, 10-Feb-05, to lugnet.off-topic.fun, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Corey Sanders

(...) LOL, this is available at a dozen well-known LEGO websites including Peeron. Now you can add those RGBs to your 'program'. It seems silly to me to create a LEGO mosaic... using colors that are far from the colors of the corresponding LEGO (...) (20 years ago, 12-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Maarten Steurbaut

(...) Every website uses different RGB-values (I did too). So which one is EXACT? (Have you read the post on the HP night bus? Many shades of the same colour...) Example: Red (196,40,27) on (URL) (196,40,27) on (URL) (223,0,50) on (URL) (189,56,38) (...) (20 years ago, 12-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Ray Sanders

(...) Even if every website had the same value for 'blue', it seems obvious that even TLC is sending out 'blue' parts that vary from a single color... (URL) (20 years ago, 12-Feb-05, to lugnet.build.mosaic)

Re: Comparing techniques (Error Diffusion Dithering) —Corey Sanders

(...) As I said before, that was 90% of the work... creating a palette of LEGO colors that were exact. A lot of trial-and-error was involved. Since my color mosaic of my girl looks exactly like the computer-generated image, I feel I was successful (...) (20 years ago, 12-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Bob Kojima

(...) i will take all the sugestions i can get! and i think all of us working together would be a good thing. it seems that you two know way more about dithering then i do. Cory, i wish i understood how you were doing your dithering cause your (...) (20 years ago, 14-Feb-05, to lugnet.build.mosaic, FTX)

Re: Comparing techniques (Error Diffusion Dithering) —Maarten Steurbaut

(...) I couldn't find the right words but that's exactly what I felt when I read your posts. So it must have been... (...) Mostly a language difference: my e-mail adress ends with skynet.be , these adresses are only found in Belgium, which is not an (...) (20 years ago, 15-Feb-05, to lugnet.build.mosaic, FTX)

Lifting a corner of the veil —Maarten Steurbaut

Tips & tricks: 1) If you decide to convert an image without dithering (e.g. a cartoon character), you may have noticed that a significant part of the image turns (dark) grey (in case this colour is in your list of colours to be used), even if you (...) (20 years ago, 7-Feb-05, to lugnet.build.mosaic, FTX)