ImageMagik

[Nefarious]

Does anyone know a good tutorial website?

I'm looking on the imagemagik.org website but it's not really set up to tutor.

I'm looking for fairly basic operations:

-extract images from .tiff

-group .jpgs into .tiff

-crop

Anything on incantation formats would be good

 

[matja]

-extract images from .tiff

extract? I assume you mean crop an image but save as a new image rather than over the original?

eg: convert group.tiff -crop 320x240+0+0 new.jpg

- will crop group.tiff, to 320x240 pixels, starting from 0,0 (top-left) and save as new.jpg

-group .jpgs into .tiff

The 'montage' command helps with assembling an image from multple images in a regular way, ie a thumbnail sheet.

eg: montage *.jpg -geometry +0+0 -tile 2x group.tiff

Will take all files ending in .jpg and arrange them into a grid, 2 images wide
and however many down, and save as group.tiff .

http://www.imagemagick.org/Usage/montage/

-crop

Same as first example, just specify same file name :

eg: convert image.tiff -crop 320x240+0+0 image.tiff

If you're cropping JPEG's, the jpegtran utility offers a lossless crop mode, which does not lose quality of the output image because it doesn't decode+encode during the process, it's -crop command is the same syntax as imagemagick's.

Anything on incantation formats would be good

Not sure what this is?

 

[BillytheImpaler]

Not sure what this is?

If I had to guess I'd say that he's asking about the command syntax, the incantation being an amusing, pun-like way to describe the command and the format being the syntax.

ImageMagick, get it?

 

[whitecrook]

You obviouly haven't read image magicks web pages as they are very good, and detail all the options and the parameters, what's the problem? the 'Usage' contains dozens and dozens of examples, written in such a way as you start at the top, read to the bottom, follow the examples then you should know. What's not tutorial about that?
http://www.imagemagick.org/Usage/

-extract images from .tiff

-group .jpgs into .tiff

-crop

What do you mean by extract? (multipage tiff?)
And group , do you mean take many single jpegs and combine into a multipage tifF?

-crop. Well there's many ways you can crop. A little more info would be useful.
http://www.imagemagick.org/Usage/crop/

If you are dealing with TIFF Images, particulary multipage, as great as imagemagick is, you should be looking at tiff tools for joining/combining/ splitting. For a start it's about 20+ times faster.