[Tex/LaTex] a good workflow for importing and cropping EPS images

epsgraphicsworkflow

I would like to be able to import an EPS file in to LaTeX while using some 3rd party image viewer/editor to quickly find crop coordinates. What are some good free tools for this? GIMP (the GNU Image Manipulation Program) is a free program that works on all major platforms, but it is not a vector graphics editor; will it work? It appears that you can choose any resolution with GIMP when you import. Additionally, since an EPS file is a vector graphics file, are there native units that LaTeX will recognize?

Best Answer

Method A: Dealing directly with PostScript

Since you're dealing with PostScript images, one option might be to use GhostView; I've done so successfully in the past. As an example, consider tiger.eps.

  1. Open tiger.eps using GhostView.

  2. Show the bounding box if you wish to see the extent of the existing whitespace:

    enter image description here

  3. Position the cursor on to identify the left, bottom, right and top coordinates. In my example, these are l b r t = 15 175 564 743.

  4. Open tiger.eps and find the lines starting with %%BoundingBox in the "preamble":

    %!PS-Adobe-2.0 EPSF-1.2
    %%BoundingBox: 1 2 611 792
    
  5. Update this to incorporate the new bounding box:

    %!PS-Adobe-2.0 EPSF-1.2
    %%BoundingBox: 15 175 564 743
    

    There may also be a %%HiResBoundingBox entry, which you can update accordingly.

  6. Refresh the view in GhostView which now shows the cropped bounding box:

    enter image description here

  7. Include as usual via \includegraphics, since the bounding box has been permanently updated. If you don't want to update the EPS permanently, you can also use

    \includegraphics[...,bb=15 175 564 743, clip=true...]{tiger}
    

    in your document.


Method B: Cropping via PDF

  1. Use the command-line conversion

    epstopdf tiger.eps
    

    which produces tiger.pdf.

  2. Use pdfcrop

    pdfcrop tiger.pdf
    

    which produces tiger-crop.pdf.

  3. Convert back to EPS using

    pdftops -eps tiger-crop.pdf tiger.eps
    

    to overwrite tiger.eps with a now-cropped version:

    enter image description here

    New bounding box resembles

    %%BoundingBox: 0 0 548 576
    

    which is marginally different to the manual way described in Method A (which yielded a width of 564 - 15 = 549; height of 743 - 175 = 568).