Didn't know that hyperion was dedicated to Vivaldi
2013-09-12 25508, 2013
outsidecontext joined the channel
2013-09-12 25532, 2013
CallerNo6 joined the channel
2013-09-12 25502, 2013
jesus2099 joined the channel
2013-09-12 25554, 2013
hawke_1
kepstin-work: you’re the one with the interesting gmic script, right? ;-)
2013-09-12 25500, 2013
reosarevok
Speaking of scripts, any contact, th1rtyf0ur?
2013-09-12 25548, 2013
pernatiy joined the channel
2013-09-12 25541, 2013
kepstin-work
I don't use any gmic script really, I just kind of ah-hoc put together filters until something looks good ;)
2013-09-12 25526, 2013
kepstin-work particularly makes use of gaussian blur (1-2px), Smooth (diffusion), and Sharpen (diffusion) in various combinations alongside some image rescaling
2013-09-12 25551, 2013
kepstin-work
for a good-quality 600dpi scan of photographic stuff, i'll usually do one gaussian blur, 3-5 passes of smooth diffusion, downscale to 300dpi, 1-3 passes smooth diffusion, 1 pass sharpen diffusion, 1-2 passes smooth diffusion.
2013-09-12 25520, 2013
kepstin-work
for line-art/anime-style drawings, I'll use stronger smoothing - sometimes smooth (patch-based) is good for that.
2013-09-12 25535, 2013
kepstin-work
for stuff that's mostly text, use much less smoothing to avoid messing up text outlines.
2013-09-12 25558, 2013
hawke_1
Maybe it was nikki who put together the script, but I thought it was based on something of yours.
2013-09-12 25506, 2013
jonjomckay joined the channel
2013-09-12 25508, 2013
hawke_1
I know it was nikki who linked it to me.
2013-09-12 25515, 2013
kepstin-work
a general script is useless to me, because every scan is different :/
2013-09-12 25527, 2013
kepstin-work
(particularly if i'm dealing with downloaded stuff)
2013-09-12 25545, 2013
nikki
yes, it was me who turned it into a set of command line things
2013-09-12 25556, 2013
bricas
reosarevok: well, dang. that sucks. oh well. 6.9 days and counting ;)
2013-09-12 25520, 2013
hawke_1
My main problem is that to me it’s just a string of numbers and not really a set of meaningful operations.
2013-09-12 25525, 2013
kepstin-work
bricas: if you had added the missing tracks to the existing medium, we could have approved that.
2013-09-12 25549, 2013
bricas
kepstin-work: yea, but i'm a lazy bugger. ;)
2013-09-12 25555, 2013
hawke_1
So it is hard to know what to tweak, an what the effects will be.
2013-09-12 25524, 2013
kepstin-work
hawke_1: i generally apply each pass of the filters separately (i.e. put g'mic into one pass, and click apply multiple times)
2013-09-12 25533, 2013
hawke_1
like, what exactly does "-gimp_edgepreserving_smoothing 0.7,0.3,0.6,1.1,15,1,0,0" do?
2013-09-12 25535, 2013
kepstin-work
that way you see what's happing as it goes on
2013-09-12 25542, 2013
kepstin-work
I do it all in the gimp plugin graphically
2013-09-12 25544, 2013
nikki
oh heh, yeah, the syntax is crazy
2013-09-12 25519, 2013
nikki
I don't think I ever fully worked it out >_<
2013-09-12 25505, 2013
kepstin-work
yeah, and as i said - it's pretty much useless, since I have to change what I do each time based on the qualities of each image :)
2013-09-12 25534, 2013
nikki
whereas I just want something that looks decent enough to upload XD
2013-09-12 25524, 2013
kepstin-work
imo, better to error on the side of undersmoothing, since too much smoothing will destroy texture in photographic images and can destroy text, particularly if it's low-contrast.
2013-09-12 25505, 2013
hawke_1
I also don’t understand the relation between the 'gmic' command line and the 'filter→G'MIC…' in gimp
2013-09-12 25543, 2013
kepstin-work
hawke_1: each of the entries in the G'Mic gimp filter list is actually a gmic script that often use multiple built-in gmic operations.
2013-09-12 25505, 2013
hawke_1
I mean, there are 274 filters in the GUI, which ones are being used by the script nikki gave me (which does make the image look much nicer than the original, although it blurs text more than I would like)
2013-09-12 25531, 2013
kepstin-work
so what nikki did was look up the gimp plugin scripts, then combine multiple of them into a single script
2013-09-12 25554, 2013
nikki
well, I mostly googled for the names of things to run
2013-09-12 25506, 2013
nikki
so it's probably not completely identical to yours
2013-09-12 25526, 2013
nikki
(it would of course help if I had access to the command or gimp on here, but that's on my laptop under a pile of stuff right now >_<)
2013-09-12 25527, 2013
kepstin-work
yeah, I think I actually switched which smoothing filter I used at some point, too; the one I use now does a better job of preserving text. assuming it has decent contrast.
2013-09-12 25539, 2013
nikki
which do you use now?
2013-09-12 25549, 2013
kepstin-work
"diffusion"
2013-09-12 25554, 2013
kepstin-work
whatever that is
2013-09-12 25556, 2013
nikki
and which did you use before?
2013-09-12 25505, 2013
LordSputnik joined the channel
2013-09-12 25506, 2013
kepstin-work
hmm, probably ansiotrophic
2013-09-12 25516, 2013
kepstin-work
I think it had a different name before
2013-09-12 25529, 2013
hawke_1
And is there a decent way to … keep a preset batch of gmic filters?
2013-09-12 25544, 2013
kepstin-work also added a sharpening step in now, which helps make text stay sharper :)
2013-09-12 25527, 2013
kepstin-work
hawke_1: save it to a file? :) I think you can drop it in a specific spot and it'll show up in the gimp plugin.
2013-09-12 25511, 2013
hawke_1
Are we talking about the same filter, then? I don’t see anything to save to a file.
hmm. I think that's actually the file containing all the filters
2013-09-12 25515, 2013
kepstin-work
so doing e.g. a one-pass "Smooth [diffusion]" is equivalent to on the command-line doing "-gimp_diffusion_smoothing 0.7,0.3,0.6,1.1,15,1" :/
2013-09-12 25505, 2013
hawke_1
kepstin-work: So you are just using the default values for each operation?
2013-09-12 25516, 2013
kepstin-work
hawke_1: mostly, yeah
2013-09-12 25546, 2013
kepstin-work
Presumably tweaking some of them might help if the diffusion pattern is a different size
2013-09-12 25545, 2013
kepstin-work
most of the parameters end up tweaking the edge-preserving/contrast-detection stuff
2013-09-12 25520, 2013
kepstin-work
i.e. tweak it too far one way, and you get a straight blur, too far the other, you don't get any smoothing or you get weird smoothing patterns because it finds too many edges
2013-09-12 25535, 2013
hawke_1
And it’s only possible to do one operation at a time from within the gimp interface?
2013-09-12 25557, 2013
kepstin-work
unless you write a new gimp filter entry that runs a function that performs multiple operations, yes
2013-09-12 25531, 2013
albino_ joined the channel
2013-09-12 25538, 2013
kepstin-work
but I like to do it a step at a time so I get individual undo entries, and can e.g. do more or less filtering if an image needs it :)
2013-09-12 25549, 2013
CatQuest
[17:55] <nikki> reosarevok: well, what ui would you expect?
2013-09-12 25558, 2013
CatQuest
something like a release group really
2013-09-12 25511, 2013
kepstin-work
(I think the default on most of the smoothing filters is about 8 iterations, which is usually way too high ;)
2013-09-12 25544, 2013
kepstin-work
unfortunately, doing things as multiple separate operations in the gimp does create a loss of precision
2013-09-12 25557, 2013
reoafk
CatQuest: possibly but it'd need an ordering field, so it can't be edited like a RG
2013-09-12 25506, 2013
reoafk
(visually similar to an RG might make sense though)
2013-09-12 25509, 2013
reoafk goes be afk
2013-09-12 25511, 2013
kepstin-work
since everything g'mic does internally is floating-point, but it has to be converted back to 8-bit for the gimp
2013-09-12 25551, 2013
hawke_1
kepstin-work: Hmm, so I could just tweak the 'iterations' parameter to be equivalent to multiple repeated smooths?
2013-09-12 25530, 2013
kepstin-work
hawke_1: yeah - it's equivalent, but with higher precision.
…I guess that could be replaced by -gimp_edgepreserving_smoothing 0.7,0.3,0.6,1.1,15,3,0,0 ?
2013-09-12 25546, 2013
kepstin-work
hmm. lets see
2013-09-12 25508, 2013
kepstin-work
I use gimp_diffusion_smoothing, but that appears to not be an actual separate filter?
2013-09-12 25545, 2013
CatQuest
reoafk: yea visually similar is what I meant. i wasnt thinking avout "how rgs work (or don't work)"
2013-09-12 25546, 2013
kepstin-work
it turns into "-apply_channels "-smooth $6,$1,$2,$3,$4,$5,0",$7,0 -c 0,255"
2013-09-12 25518, 2013
AlexJFisher is reading through chatlogs to catch up on gimp image processing chat.
2013-09-12 25556, 2013
CatQuest
oh good gawd. all I do is adjust colours (if it needs it) and sharpen a bit (if blurry) and upload.. :/
2013-09-12 25501, 2013
kepstin-work
which would presumably be -smooth <iterations>,0.7,0.3,0.6,1.1,15,0
2013-09-12 25526, 2013
CatQuest
i mean. y'all welcome ot re-do the ones i upload but
2013-09-12 25531, 2013
kepstin-work
CatQuest: we're dealing with doing the descreening necessary to avoid the 'pattern of dots' thing you get with high-res scans.
2013-09-12 25538, 2013
AlexJFisher
kepstin-work: I've been using the process you suggested a couple of weeks ago. I found 2px gaussian blur to be too much. what resolution are your scans?
2013-09-12 25542, 2013
CatQuest
do ihaveto know what minussmooth is supposed to do ?
2013-09-12 25554, 2013
kepstin-work
AlexJFisher: hm, I normally do 1px gaussian on most stuff
2013-09-12 25500, 2013
CatQuest
\O_O/ gaussian blur
2013-09-12 25500, 2013
kepstin-work
but I do 600dpi scans initially
2013-09-12 25532, 2013
AlexJFisher Doesn't adjust colours. He generated a icc profile for his scanner using a colorchecker.
2013-09-12 25537, 2013
kepstin-work
(note that the value that g'mic takes if you use the g'mic gaussian blur is std-dev, which is 1/2 radius. So use 0.5 for 1px blur)
2013-09-12 25549, 2013
CatQuest
hey kepstin, hey. I have a crazy world of artur brown" origina llp thing that's split into twoo because scanning, would you leetily fix it to be one immage for me???
2013-09-12 25556, 2013
kepstin-work
I need to get a colourchecker and calibrate my scanning :/
2013-09-12 25518, 2013
kepstin-work
CatQuest: I could, but it wouldn't be until later this evening (about 5-6 hours from now)
2013-09-12 25521, 2013
hawke_1
kepstin-work: So — blur, smooth,sharpen, smooth?
2013-09-12 25527, 2013
AlexJFisher
When you originally said you did 4-5 passes of diffusion, was that not at the default 8 iterations each?
2013-09-12 25528, 2013
CatQuest
woa
2013-09-12 25531, 2013
CatQuest
cool
2013-09-12 25536, 2013
kepstin-work
blur, smooth, resize, smooth, sharpen, smooth ;)
2013-09-12 25543, 2013
kepstin-work
AlexJFisher: no, at 1 iteration each :)
2013-09-12 25547, 2013
CatQuest sees if he can re-find it
2013-09-12 25548, 2013
AlexJFisher
1??
2013-09-12 25559, 2013
kepstin-work
one pass of 4 iterations is the same as 4 passes of 1 iteration :)
2013-09-12 25507, 2013
kepstin-work
(approximately)
2013-09-12 25508, 2013
AlexJFisher
So you do a total of 4-5 and I've been doing 24??
2013-09-12 25511, 2013
kepstin-work
yep
2013-09-12 25512, 2013
AlexJFisher
oh dear
2013-09-12 25537, 2013
kepstin-work
if everything looks plasticey and super-smooth, that could be why :)
2013-09-12 25502, 2013
AlexJFisher
check out some of my recent uploads if you like.
2013-09-12 25504, 2013
hawke_1
kepstin-work: In this case I am fixing moiré on downloaded 300dpi scans, so … to omit the resize I would just want blur/smooth/sharpen/smooth?
2013-09-12 25519, 2013
kepstin-work
hawke_1: pretty much, yeah.
2013-09-12 25532, 2013
kepstin-work
for 300dpi, use a 0.5 to 1px gaussian blur initially
2013-09-12 25554, 2013
kepstin-work
that's just to reduce the tiny pixel variation that can mess up the smooth filter
2013-09-12 25500, 2013
AlexJFisher
My colorchecker came free with a colorimeter I bought to calibrate my TV.
2013-09-12 25504, 2013
kepstin-work
alternately, a filter that removes hot pixels could work
2013-09-12 25518, 2013
CatQuest
what is a hot pixel? a really really sexy one?
2013-09-12 25521, 2013
kepstin-work
but hot pixel removal filters tend to mess up text outlines at 300dpi
