Search found 64 matches

by muccigrosso
2018-03-14T06:57:55-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

In this thread, there are two concepts of version. One is the version of the software: v6 or v7. The other is the syntax, which we call v6 or v7 because v6 software had certain (rather loose) rules about syntax, and v7 which tightened up some rules. However, for compatibility, v7 software can loose...
by muccigrosso
2018-03-13T20:28:07-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

If you have set up a symbolic link between convert and magick, then the two commands are the same and are using IM 7 code. I didn't set it up. I install IM via Homebrew, and there it was. But the text I quote from the web page seems to indicate that the links are expected. But yes, convert (and ide...
by muccigrosso
2018-03-13T13:44:54-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

So you're saying that by not using it, I'm missing out on something? IM 6 (convert syntax) is no longer having new features added to it. IM 7 (magick syntax) already has new features. It also processed grayscale images as one channel and not 3 as in IM 6. There are a number of features in IM 7, suc...
by muccigrosso
2018-03-13T11:22:31-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

And I've shown that convert by itself seems identical to magick by itself, ... But you showed above a command that "convert" by itself accepts a sequence of arguments that "magick" by itself doesn't. They are not identical. (I suppose the symlinked program finds how it was called, and processes its...
by muccigrosso
2018-03-13T07:04:09-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

Well, you can do whatever you want, of course. But you have shown that "convert" by itself uses the old v6 syntax. No, I've shown that convert by itself also uses the old syntax, since the new works as well. And I've shown that convert by itself seems identical to magick by itself, but that identif...
by muccigrosso
2018-03-13T06:55:47-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

If you want to continue using IM 7 and want all the new features and any new ones that are subsequently added, then I recommend you start using the magick syntax so that you gain by using IM 7. So you're saying that by not using it, I'm missing out on something? This is my question: what exactly is...
by muccigrosso
2018-03-12T11:13:36-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

"magick convert" is v6 syntax. I can't see a good reason to use this. It might be a stopgap, if scripts written for v6 are to be used with v7. I agree with not using both words, but for the reason that convert works all by itself. I find the code a lot easier to read with convert, identify, mogrify...
by muccigrosso
2018-03-12T08:38:22-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

convert -background blue -size 4000x4000 -negate -scale 10% xc: show: This command isn't valid. Operations are performed in the order given, and you can't "-negate" or "-scale" an image that hasn't yet been created (by "xc:"). Older versions of IM (v6) didn't enforce the order, and rearranged opera...
by muccigrosso
2018-03-12T07:32:19-07:00
Forum: Users
Topic: PSD RLE compression — any speed improvements possible?
Replies: 21
Views: 8438

Re: PSD RLE compression — any speed improvements possible?

Note that in IM 7, you should replace convert with magick (not convert and not magick convert) I'm confused about this. On my system (Mac High Sierra, IM 7.0.7-25), convert and magick convert seem to be equivalent, e.g., for this command: convert -background blue -size 4000x4000 -negate -scale 10% ...
by muccigrosso
2018-03-05T12:40:13-07:00
Forum: Users
Topic: resolution of PDF files forced to 72x72 even when -density is used
Replies: 4
Views: 3278

Re: resolution of PDF files forced to 72x72 even when -density is used

* The "identify -verbose" command often gives no resolution for raster images, which must have a resolution. And for PDFs, you say it gives the "overall" resolution, but when the PDF is nothing other than a single raster image and nothing else, I expect the overall resolution to match that of the e...
by muccigrosso
2018-03-05T12:34:35-07:00
Forum: Users
Topic: Image resizing 10x slower on Linux than Mac
Replies: 12
Views: 4631

Re: Image resizing 10x slower on Linux than Mac

Best documentation right now about the differences is http://imagemagick.org/script/porting.php#cli Thanks. That's helpful. BTW, @snibgo, note that it says this about the "old" utilities: To reduce the footprint of the command-line utilities, these utilities are symbolic links to the magick utility.
by muccigrosso
2018-03-03T22:25:23-07:00
Forum: Users
Topic: Image resizing 10x slower on Linux than Mac
Replies: 12
Views: 4631

Re: Image resizing 10x slower on Linux than Mac

I'm surprised those symlinks work. For example, "magick identify rose:" is a valid command but "magick rose:" isn't, so if "identify" is a symlink to "magick", is "identify rose:" valid somehow? Yep, so maybe there are other things going on. I can tell you that they work though. (Is there work bein...
by muccigrosso
2018-03-03T20:14:07-07:00
Forum: Users
Topic: Image resizing 10x slower on Linux than Mac
Replies: 12
Views: 4631

Re: Image resizing 10x slower on Linux than Mac

"convert" is a v6 command. "magick" is a v7 command. I use both versions, and I haven't set symbolic links in either direction because I want to be sure which version I am using. Ah, that makes some sense. FWIW, I'm using a homebrew-installed version on my Mac, which reports: Version: ImageMagick 7...
by muccigrosso
2018-03-03T17:22:04-07:00
Forum: Users
Topic: Image resizing 10x slower on Linux than Mac
Replies: 12
Views: 4631

Re: Image resizing 10x slower on Linux than Mac

If on IM 7, your command should be using magick and not convert I've wondered about this before: in what contexts should one use magick instead of convert or one of the other commands like identify (instead of info)? EDIT: Looking at my system, I see that all the other commands are just symlinked t...
by muccigrosso
2018-02-19T08:55:18-07:00
Forum: Users
Topic: Convert 2-bit to png after deskew has odd results
Replies: 29
Views: 11473

Re: Convert 2-bit to png after deskew has odd results

If you care about where the threshold occurs, you should use "-threshold 50%" or whatever. Relying on the file-writer part of IM to threshold 1-bit in a particular way seems unwise. If you use "-threshold 50%", you can put "-depth 1" anywhere you want (as far as I can see) and get the same result. ...