| | <<<Back 1 day (to 2015/01/08) | 20150109 |
| jluc | hello | 10:14.11 |
| ghostbot | Welcome to #ghostscript, the channel for Ghostscript and MuPDF. If you have a question, please ask it, don't ask to ask it. Do be prepared to wait for a reply as devs will check the logs and reply when they come on line. | 10:14.11 |
| jluc | i wish to create PDF without images out of PDFs with images | 10:15.05 |
| | how can i do so with ghostcript ? | 10:15.39 |
| chrisl | You mean just drop sampled images from the input? | 10:18.55 |
| jluc | yes it should be as if there were no images, or as if images were replaced with white or blank areas | 10:20.14 |
| chrisl | There's no easy way to do that with Ghostscript. It could be done, but it would take a fair amount of Postscript programming to make it happen | 10:21.01 |
| jluc | ok thanks | 10:21.38 |
| | do you know of any tool to do so ? | 10:22.00 |
| | keeping PDF layout (apart for images) | 10:22.21 |
| chrisl | Acrobat Pro lets you delete objects | 10:22.24 |
| jluc | i'm looking for a command line solution | 10:23.34 |
| | i first imagined this as a very basic functionnality | 10:23.52 |
| | then i realised it seems its not | 10:24.05 |
| chrisl | Why? Most people are intent on maintaining the appearance as accurately as possible | 10:24.24 |
| | I can't really fathom why you'd want to do it..... | 10:25.11 |
| jluc | printing images on home quality printers is often very ugly | 10:25.11 |
| | costs lots of ink money | 10:25.17 |
| chrisl | So, print in grayscale.... | 10:25.35 |
| jluc | and produced pages car hardly be read most of the time when there is an image background | 10:25.44 |
| | can | 10:25.53 |
| | i want to have orthograph proofread | 10:26.17 |
| chrisl | Hmm, just dropping the image won't guarantee to help that situation | 10:26.33 |
| jluc | images hinder the process | 10:26.34 |
| chrisl | What if the text over the image is white text? | 10:26.48 |
| jluc | true that'd be a problem | 10:27.01 |
| | but that is rare and a much less worse problem then having the images | 10:27.26 |
| chrisl | Besides, if the text isn't easy to discern over the image, isn't that the first "fail" in the proofing process? | 10:27.39 |
| jluc | readability is adjusted to printing process | 10:28.09 |
| | final printers are professional printers | 10:28.14 |
| | proofreader's printer are home shit | 10:28.23 |
| chrisl | Also, just dropping the image doesn't ensure there aren't other objects under the image | 10:28.38 |
| jluc | true, its not perfect, but it'd be usefull in most of usecases | 10:29.21 |
| | ok so no hints ? | 10:30.36 |
| chrisl | Ghostscript does allow you to specify ICC profiles for different object types. If you could create an ICC profile that mapped all colours to white, and apply that to images..... that *might* be viable. But that's *way* outside my knowledge base..... | 10:30.41 |
| jluc | lol that's an idea | 10:30.59 |
| chrisl | What platform are you running on? | 10:31.18 |
| jluc | ubuntu + scribus | 10:31.24 |
| | solution as for now is to rename all images folders to images.bak and re-produce the PDF with missing images | 10:32.06 |
| | i do it by hand as for now | 10:32.26 |
| chrisl | Actually, what I would be tempted to do would be to try to create an ICC profile to give a very washed out look to images, thus the image is still visible, but very light | 10:32.31 |
| jluc | so i can write a script to do that | 10:32.31 |
| chrisl | You could look into http://sourceforge.net/projects/pdfedit/ | 10:32.50 |
| | It has scripting capabilities, so you might be able to script the removal of image objects.... | 10:33.20 |
| jluc | ok thank you chrisl | 10:33.37 |
| chrisl | disclaimer: I've never found pdfedit to work terribly well, so YMMV! | 10:33.42 |
| jluc | ok | 10:33.50 |
| chrisl | But personally, I like the "washed out" ICC profile solution - I think it would fit better into a proof reading workflow | 10:34.55 |
| tor8 | chrisl: wouldn't hacking the GS pdf interpreter to just drop the showimage at the end work as well? | 10:38.46 |
| | or is all that tied to consuming the data? | 10:39.01 |
| chrisl | tor8: as I said, Postscript programming required..... | 10:39.12 |
| tor8 | chrisl: true... | 10:39.23 |
| | robin's pdf filter thing for mupdf should be able to do it as well, but that requires C programming and recompiling | 10:39.43 |
| chrisl | I'm not sure how much, but knowing the PDF interpreter, "trivial" rarely applies..... | 10:40.03 |
| tor8 | yeah. as you said, a washed out color profile is probably the best. | 10:40.23 |
| | but if all you want is the text, the text extraction device might be enough? | 10:41.06 |
| chrisl | He wants to keep the layout | 10:41.19 |
| | Hacking the GS PDF interpreter *probably* wouldn't be a massive hassle, but ensuring it works with all cases could well be | 10:41.36 |
| jluc | with complex layout, text extraction makes the text quite often not possible to be read | 10:45.04 |
| | to be read as a text (not as a bunch of glyphs) | 10:45.28 |
| tor8 | chrisl: jluc: the mupdf text extraction ought to be possible to preserve the layout if using absolute HTML positioning or svg or something similar | 10:45.56 |
| | but again, requires programming | 10:46.00 |
| chrisl | The txtwrite device maintains sentences, paragraphs etc, but not the page layout..... | 10:46.30 |
| | WTF is the point of automake?!?! What a pile of utter sh*te...... :-( | 10:54.35 |
| tor8 | uh oh... I think we finally broke chrisl. | 10:54.57 |
| sebras | chrisl: welcome! I have been here for a long time. ;) | 10:55.22 |
| chrisl | Well, the thing is, I get the point of autoconf - although I think it's overblown, bonkers and stupidly over complex..... but automake is just... ugh :-( | 10:56.33 |
| sebras | chrisl: from my pov it is just a tool that is more difficult to configure to have it produce the makefile you really want. | 10:57.37 |
| | chrisl: what exactly did you get stuck on? | 10:57.44 |
| chrisl | I'm not stuck, exactly.... the ijs automake stuff creates soft links for 'compile', 'config.guess' etc which link to files specific to the automake version in use. So you end up with a configuration that relies on the same automake version being installed at build time | 10:59.36 |
| | Aha, looks like I want to add the "--copy" argument, that copies the relevant scripts rather than linking them...... | 11:06.25 |
| sebras | chrisl: right, I think there is always a way to have a package's autotools stuff be independent of the version installed on your system. | 11:07.31 |
| | chrisl: don't forget --add-missing | 11:08.02 |
| chrisl | sebras: but really, that *should* be the default - that is, after all, supposed to the be the point of autotools | 11:08.07 |
| | --add-missing is already there, but thanks | 11:08.22 |
| sebras | chrisl: agreed. I have no idea why the default is to symlink, that makes no sense. | 11:09.22 |
| chrisl | sebras: presumably it's just to make life difficult for people like us! | 11:10.24 |
| sebras | chrisl: that does indeed sound like GNU. | 11:10.38 |
| Robin_Watts | paulgardiner, chrisl: I booked the snowmobile trip yesterday. No charges to my CC unless we don't turn up. And we can cancel anytime with 24 hours notice. | 14:30.58 |
| | They will supply snow suits/boots/helmets. They can't guarantee to supply googles. so we need to get our own. | 14:31.39 |
| | I'm seeing if the Hotels Ski place will rent them now. | 14:31.55 |
| chrisl | Robin_Watts: sounds good. Are the goggles required, or would something like sports sun glasses work? | 14:49.07 |
| Robin_Watts | chrisl: They seemed to imply that we really ought to have them. | 15:37.10 |
| | They look to be about 20 quid each to buy on amazon. | 15:38.06 |
| | I'd be wanting a pair I can wear glasses underneath. | 15:39.19 |
| chrisl | Robin_Watts: Okay. I was just thinking that I really need some shades for cycling (stop the flies getting in my eyes), so would have been two birds, one stone..... | 15:40.29 |
| Robin_Watts | chrisl: Feel free to mail them and ask. | 15:40.55 |
| | They say that we should bring googles/scarf/waterproof gloves. | 15:41.29 |
| | So I guess it's a matter of covering as much exposed skin as possible. | 15:41.46 |
| chrisl | Yeh, so goggles are going to work better for that | 15:42.41 |
| rayjj | You *definitely* want goggles for snowmobiling. For skiing you can get by with sun glasses, but on the vehicle it's different. Double layer glass is good to prevent fogging, and sometimes can be had for near the same cost | 15:50.16 |
| | and AFAIK you can wear glasses under all ski goggles | 15:50.38 |
| Robin_Watts | Yeah, Amazon do single layer skiing googles for 3 quid, but ones you'd actually want start about 20 quid (and go up to 100 or so) | 15:52.49 |
| | Anyone have any experience of renting such things? | 15:53.37 |
| graphicore | mvrhel_laptop: Can you have a look at: http://bugs.ghostscript.com/show_bug.cgi?id=694982 | 15:55.26 |
| rayjj | graphicore: I had a look, and I tend to concur that this doesn't work as I expect. I zapped the tint transform in tritone.pdf (to make it totally wrong) and with or without the -sDeviceNProfile=artifex_tritone.pdf it looks the same | 15:58.26 |
| | graphicore: and different to the original (mostly correct) tint transforms in tritone.pdf | 15:59.08 |
| | graphicore: mvrhel_laptop: In theory (AIUI) with an incorrect tint transform, using -sDeviceNProfile=artifex_tritone.pdf should restore the original (correct) appearance | 16:01.12 |
| graphicore | +rayjj: I thought the icc profile should define the colors rather than the tint transform in the pdf/eps at least in the eps, the deviceN to cmyk transformation is meant as a fallback. | 16:01.34 |
| | rayjj: also, the test.eps has for that reason messed up color definitions (something else could still be wrong) | 16:02.27 |
| rayjj | graphicore: OK, that's what I thought (why the Orange was more green than orange) | 16:03.07 |
| mvrhel_laptop | oh someone actually using a DeviceNProfile | 16:04.12 |
| rayjj | graphicore: on the off chance that setcmykcustomcolor was the problem (defining Separation colorspace instead of DeviceN) I modified that and still the same which is why I switched to trying tritone.pdf | 16:04.43 |
| | mvrhel_laptop: yeah, and it seems to be ignored | 16:05.00 |
| graphicore | eventually I plan like to use the display device for a color managed workflow to create deviceN (duotone, tritone etc. images) | 16:05.02 |
| rayjj | I have to do a school run. bbiab | 16:05.11 |
| mvrhel_laptop | graphicore: glad to here you want to make use of it. I will look this all over either today or this weekend | 16:05.50 |
| graphicore | mvrhel_laptop: great THANKS! :-) here is the project, btw: https://github.com/graphicore/multitoner | 16:06.59 |
| mvrhel_laptop | cool | 16:07.58 |
| Robin_Watts | resists saying "I believe Amazon sells a large range of was to suit all budgets." on bug 695763. | 16:19.37 |
| mvrhel_laptop | bbiaw | 17:26.30 |
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