Category Archives: image manipulation

Another look at Pixelmator

After posting a quick review of Pixelmator version 1.2.3, I got some comments that basically said two things:

  1. crop to selection is available in the context menu;
  2. paste as a new image is easy to accomplish.

These issues are indeed resolved, see below. So I continued my quest and tried to find the following features in Pixelmator:

  • autocrop
  • show the image size
  • view the name of the assigned color profile
  • remove the assigned color profile
  • show the size of the current selection while selecting
  • edit the selection
  • quantization, convert to indexed color

Crop to selection
Indeed crop to selection is available in the context menu, which is activated by Ctrl-LeftClick or RightClick (if your mouse has a second button).

Paste as new image
Doing a bit of searching I found (on the Pixelmator forum) that pasting as a new image is indeed easy, just follow these steps:

  1. copy whatever you want to paste in Pixelmator to the clipboard;
  2. activate File -> New Image in Pixelmator (Cmd-N); the new image will automatically take the dimensions of the image in the clipboard;
  3. activate Edit -> Paste (Cmd-V) in Pixelmator.

That’s it. Indeed very simple, although not intuitive IMHO.

Autocrop is not available directly in Pixelmator, it seems. However, this is fairly easily worked around:

  1. select the Magic Wand tool (keyboard shortcut: W);
  2. click on the outer region of the image;
  3. invert the selection (Shift-Cmd-I);
  4. show the context menu (Ctrl-LeftClick or RightClick);
  5. select Crop;
  6. press Enter to confirm.

However, since I use this feature a lot, I still prefer to have a single menu option so I can assign a keyboard shortcut to it.

Show the image size
The size of the current image can be viewed using the command File -> File Info… or by pressing the keyboard shortcut Alt-Shift-Cmd-I. Easy enough.

Personally I would prefer to have the option to show the image size in the title bar. This option is unavailable in the Preferences. But this is a minor nuisance.

View the name of the assigned color profile
The assigned color profile can also be viewed using the File Info… command (Alt-Shift-Cmd-I). Excellent.

Remove the assigned color profile
There is no direct menu option for removing the color profile. However, it’s easy to do:

  1. select all of the image (Cmd-A);
  2. copy it (Cmd-C);
  3. create a new image (Cmd-N) – it will automatically get the right dimensions;
  4. paste (Cmd-V).

That’s it.

Show the size of the current selection while selecting
With the Rectangular Marquee Tool (shortcut: M) you can select a rectangular region. While selecting, I’d like to be able to see the size of the selection, because often the selection needs to fit a certain predefined size or maximum size.

In Pixelmator it seems impossible, however, to view the width and height of the selection while selecting it.

Edit the selection
When a (rectangular) region is selected, the selection cannot easily be adjusted. There is a Refine Selection tool available for changing the selection, but this tool does not allow manually editing the selection, for example to add a few pixels on the right.

GIMP 2.4.7 has a simple but powerful feature that allows the selection to be edited with the mouse on 6 axes (top, top-right, right, etc.) This would be a welcome improvement for Pixelmator as well.

Although this (fairly basic) functionality is missing, the power of the Refine Selection tool should not go unnoticed. It allows advanced selection editing, for example to change a rectangular selection area to a rounded rectangular area. Very nice indeed.

Quantization, convert to indexed color
Finally another feature I’m using all the time in GIMP is changing an RGB image to indexed color, to optimize it for display on the Web. This uses a technique known as image quantization, which uses one of a few algorithms to create an optimum palette for the resulting image.

This feature seems to be missing in Pixelmator.

Pixelmator is a powerful image manipulation program that looks very very good. It has various very powerful functions, such as filters, layers, advanced selections, etc. Also it support a large number of bitmap formats for export.

However, for me, Pixelmator is currently not able to replace GIMP for day-to-day image manipulation. It seems to be missing some features that I need to have at my fingertips all the time.

If some of the features I think are missing are hidden somewhere under the surface, please drop me a note in the comments.

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Posted by on 10 September 2008 in image editor, image manipulation, mac os x, pixelmator


>Quick review of Pixelmator

>While still looking for a real Mac OS X image manipulation program to replace GIMP, I did a quick review of Pixelmator.

After starting Pixelmator, it’s obvious the developers have put a lot of time and effort into making this application look and feel like a charm. Although the black transparent look is not conform the standard Aqua look and feel on Mac OS X 10.5 “Leopard”, this does not reduce the usability of the application.

Pixelmator has more features than Acorn or Seashore combined together, but not as many as Photoshop or GIMP. But although there are a lot of features, for me just a few are important, since I need them on a day-to-day basis.

My findings based on a quick review:

  • There seems to be no way to remove a color profile, although color profiles can be assigned. This can be worked around by copying all and pasting from clipboard.
  • There is no Paste as New Image option.
  • An Autocrop feature seems to be unavailable.
  • A Crop to Selection features seem to be missing; and since a Paste as New Image option is also missing, this cannot be easily worked around. There is a Crop tool, but this is in my workflow not productive, since in the absence of an autocrop feature I typically (a) use the magic wand to select an outer part of an image, (b) invert the selection (c) crop to the selection.

Posted by on 8 September 2008 in image, image editor, image manipulation, mac, macos, macosx


>Quick review of Seashore

>Seashore is a promising application, aiming to deliver a Mac OS X-version of the popular GIMP image manipulation program. I did a quick review of 0.1.9 and found the following:

  • This build is dated April 2007, which seems to indicate development has stalled – which is too bad…
  • The Open with… option in the Finder did not work for me when I selected Seashore.
  • Full quantization support has not been ported yet, so there is no option to reduce the number of colors.
  • There is a Select menu, but some of the selection actions are under the Edit menu (Select All, Alpha, Inverse, None). This seems counter-intuitive.
  • Zoom in and zoom out are under the keyboard shortcuts Cmd-Up and Cmd-Down respectively. Typically these are under Cmd-Plus and Cmd-Minus.
  • There is no autocrop feature.
  • Overall, the application looks very nice. It feels like a decent Mac OS X-citizen.

My conclusion is that it’s a very promising application, that may be able to beat Photoshop Elements and Acorn one day. But not today.

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Posted by on 8 September 2008 in gimp, image editor, image manipulation, mac, seashore