If the shape can be defined apriori then you can achieve the oval
shape during the convert process.

On Sun, Sep 28, 2014 at 4:31 PM, Steve Kinney <ad...@pilobilus.net> wrote:
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> On 09/28/2014 02:47 PM, Partha Bagchi wrote:
>> Your distribution probably has imagemagick. Use imagemagick to
>> batch convert and watermark.
>>
>> Take a look at this:
>> http://www.imagemagick.org/Usage/annotating/
>
> Yes to that:  imagemagick is the right tool for resizing lots of
> images at once and/or adding watermarks to them.  Still, if you
> are going to edit each image individually in the GIMP to get that
> oval, it might be just as convenient to make the watermark on an
> otherwise transparent layer, save that as a file of its own, and
> drag+drop to add it to each image before saving.
>
> In re cropping, I think what you probably want to do is make your
> oval selection, and do Image > Crop To Selection.  That gives you
> the rectangle.  Then do Select > Invert followed by Edit > Delete
> to delete everything in the rectangle except your oval.
>
> (The usual keyboard shortcut for invert selection is control+i,
> for delete is control+x.)
>
> You can choose the color of the "deleted" area by setting it as
> the background color in your color selector tool, if the image /
> layer  you are working on does not have an alpha channel. The
> alpha channel in a layer or image enables transparency; with no
> alpha channel, anything you delete will turn into the background
> color.
>
> If the image / layer you are working on has an alpha channel, you
> will get a transparent background instead.  This is a frequently
> used option for non-rectangular image content that will be
> displayed on websites.
>
> To add or remove the alpha channel from your image or layer, right
> click on the thumbnail in the Layers dialog and select "Add alpha
> channel" or "Remove alpha channel".  To preserve a transparent
> background in your finished image, export the finished image in
> PNG format.  Saving as JPG (for instance) will turn the
> transparent areas into the background color that is set at the
> time, as JPG does not support transparency.
>
> :o)
>
> Steve
>
>
>
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