User talk:Oofoe
Percentage of difference between 2 images
One trick that is used when displaying differences between two images is to rebase the image so that the "zero" color is actually #808080. Then you can show differences that are both positive and negative. –Donal Fellows 11:08, 29 December 2009 (UTC)
- Hi! Thanks for the suggestion! Unfortunately, because the differences were so small, the rebased image was fairly uninteresting, so I settled for heavy contrast enhancement instead. I have updated the image and hopefully it's easier to see now. -- Oofoe
- I just suggested it because I encountered the concept when I solved the Image convolution task. I'm not very surprised that it didn't produce an interesting image though; the two images don't differ all that much. (I didn't even try to do a visual difference for image difference task, and instead took my cue from the other solutions.) –Donal Fellows 10:50, 31 December 2009 (UTC)
- Yeah, I just did the image display because it was so easy once I had the calculated the difference. I figured in the spirit of showing what is "different and unique" about REBOL it would be justified to show how simply you could create a GUI to display and manipulate images... -- Oofoe
- Speaking of which...While we have a few GUI-specific tasks (I don't know that there's an exhaustive category of all such tasks; You might need to do some browsing to find them all), it would be nice to have more. Do you think you could lend a hand there by creating a few draft tasks? I can think of any number of ideas, if you'd like some starting direction, but my GUI work has been in C++/MFC, so suspect your REBOL experience might give you a cleaner perspective for those tasks. --Michael Mol 18:35, 31 December 2009 (UTC)
- Hi! I will see what I can come up with. Off the top of my head would be a four function calculator, a text editor and a simple email reading client. Perhaps I might have a look at it by the weekend (it's been pretty busy around here recently as you can see from my update history...). For REBOL, the text editor task is cheating, though, you just type "editor %filename" at the REPL... ;-) Would layout sketches be reasonable? ---- Oofoe 08:08, 5 January 2010 (UTC)
- I wouldn't normally think on that scale; I would normally look closer to simple operations with primitives. Text editors and four-func calculators are pretty common proof-of-concept GUI programs, though! --Michael Mol 09:08, 5 January 2010 (UTC)
- Hi! I will see what I can come up with. Off the top of my head would be a four function calculator, a text editor and a simple email reading client. Perhaps I might have a look at it by the weekend (it's been pretty busy around here recently as you can see from my update history...). For REBOL, the text editor task is cheating, though, you just type "editor %filename" at the REPL... ;-) Would layout sketches be reasonable? ---- Oofoe 08:08, 5 January 2010 (UTC)
- Speaking of which...While we have a few GUI-specific tasks (I don't know that there's an exhaustive category of all such tasks; You might need to do some browsing to find them all), it would be nice to have more. Do you think you could lend a hand there by creating a few draft tasks? I can think of any number of ideas, if you'd like some starting direction, but my GUI work has been in C++/MFC, so suspect your REBOL experience might give you a cleaner perspective for those tasks. --Michael Mol 18:35, 31 December 2009 (UTC)
- Yeah, I just did the image display because it was so easy once I had the calculated the difference. I figured in the spirit of showing what is "different and unique" about REBOL it would be justified to show how simply you could create a GUI to display and manipulate images... -- Oofoe
- I just suggested it because I encountered the concept when I solved the Image convolution task. I'm not very surprised that it didn't produce an interesting image though; the two images don't differ all that much. (I didn't even try to do a visual difference for image difference task, and instead took my cue from the other solutions.) –Donal Fellows 10:50, 31 December 2009 (UTC)
Missing Output
Hi, I think you failed to paste in the last line of the sample output of the REBOL entry of Align columns? --Paddy3118 08:52, 30 September 2010 (UTC)
- Thanks! Good catch! It should be fixed now... ---- Oofoe 00:45, 5 October 2010 (UTC)