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| zookeeper | hi, eleazar | 13:53 |
|---|---|---|
| eleazar | zookeeper: hi | 13:53 |
| eleazar | what brings you here? | 13:53 |
| zookeeper | well, i figured i'd have asked a quick art question actually, about the nebula images you have | 13:54 |
| eleazar | yeah? | 13:54 |
| zookeeper | they seem to be from nasa/hubble pics | 13:54 |
| eleazar | yeah mostly hubble i think | 13:55 |
| zookeeper | i was wondering, how was the black background erased from the originals to make the overlay-like images? was it just manual work? i can't seem to find a tool in any gfx program i have with which i could "erase blackness" from an image | 13:55 |
| zookeeper | i mean, let's say i had a white semi-transparent white box (meaning gray) on a black background. is there any easy way to remove the black so i'd have a semi-transparent white box on empty background? | 13:56 |
| eleazar | not in a single step | 13:57 |
| zookeeper | maybe what i'm looking for is impossible in the first place, but it...seems like such a useful thing to be able to do that it bugs me when i can't find anything about it anywhere | 13:57 |
| eleazar | it would have to be a very intelegent and specific tool | 13:57 |
| zookeeper | not necessarily? it could be simply fed a separate image of the background only | 13:58 |
| eleazar | there's no concrete way to distinguish a "transparent" white box against black from a grey one that's opaque | 13:58 |
| zookeeper | i mean...i suppose that's how it'd have to work | 13:59 |
| zookeeper | so i could give the tool a black image (a copy of the black background), and it'd then figure out the differences between the images and remove the black based on that | 13:59 |
| zookeeper | i haven't been able to simulate that with any kind of smart layering tricks i've tried | 13:59 |
| eleazar | maybe if you could also assume a consistent level of transparency, which again the tool has no way of discovering | 14:00 |
| zookeeper | right | 14:02 |
| * zookeeper tries to visualize it | 14:02 | |
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| zookeeper | i guess in my example it'd work like this...1) the tool looks at a white pixel: if it's completely white, nothing happens, since the black is it's direct opposite. 2) it looks at a 128,128,128 pixel, and figures that it means half transparent. so it changes it to a 128,128,128 pixel with 50% alpha | 14:05 |
| zookeeper | if it sees a black pixel, it'll just change it to transparent | 14:05 |
| zookeeper | i mean, i'm not looking for anything that can read minds or do anything smart really | 14:06 |
| zookeeper | just something which can do a simple "alpha subtraction" like that on an image based on an second image | 14:06 |
| eleazar | well, if you are assuming everything was originally white, you can use photoshop to make a mask based on the luminosity | 14:06 |
| zookeeper | ha, i think i found a decently working method in psp x | 14:10 |
| zookeeper | as always, asking out loud helps you to find the answer yourself ;) | 14:10 |
| STalKer-X | the gimp | 14:12 |
| eleazar | :) | 14:13 |
| zookeeper | the gimp? sorry, but just no ;) but i don't think you're looking for this particular argument any more than i am | 14:13 |
| STalKer-X | why not? :) | 14:13 |
| zookeeper | uh...well...because the gimp is a piece of junk ;)? | 14:14 |
| zookeeper | how's that for starters | 14:14 |
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| STalKer-X | if you explain _why_ | 14:14 |
| zookeeper | the usual: UI | 14:14 |
| zookeeper | but then again, i don't think the exact program matters much, they seem to all have the same functions anyway | 14:15 |
| zookeeper | a bit different filters | 14:15 |
| STalKer-X | well, yeah, the gui is quite... | 14:17 |
| zookeeper | i'm not really aware of much other reasons to hate gimp other than the GUI | 14:17 |
| STalKer-X | i heard they wanted to change to UI | 14:19 |
| zookeeper | that and actually getting it done seem like two rather different things ;) | 14:21 |
| zookeeper | anyways. the nebula gfx you have wouldn't happen to be GPL'able would they :p? or do i have to make my own | 14:36 |
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| eleazar | zookeeper: actually Freeorion uses the Creative Commons license | 15:41 |
| eleazar | However, i'll release the ones i did under the GPL too | 15:42 |
| eleazar | but gotta go now. | 15:42 |
| GeofftheMedio | to clarify: freeorion art and other creative content is under a CC license. Code is GPL | 15:42 |
| zookeeper | i know, i know | 15:43 |
| zookeeper | eleazar, that's nice ;) although not really necessary for me since i suppose these are easy enough to make on my own | 15:43 |
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