Date: Fri, 29 Jan 2010 18:51:06 +0100 From: Polytropon <freebsd@edvax.de> To: Steven Friedrich <freebsd@insightbb.com> Cc: freebsd-questions@freebsd.org Subject: Re: How do I create a 40x40 pixel monochrome mage for KMail? Message-ID: <20100129185106.a8256a5e.freebsd@edvax.de> In-Reply-To: <201001291241.06909.freebsd@insightbb.com> References: <201001291241.06909.freebsd@insightbb.com>
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On Fri, 29 Jan 2010 12:41:06 -0500, Steven Friedrich <freebsd@insightbb.com> wrote: > I have a webcam, but it won't take a monochrome picture and it doesn't > snapshot all the resolutions that it can display in. In particular, I tried > the two lowest and the lowest, sqcif, isn't supported by my webcam and qsif > seg faults. Those would have been 128x96 and 160x120. > > I figured that if I used the lowest resolution, I could crop out a 40x40 > image. You can use ImageMagick's convert command to scale the image, and turn it into monochrome; see "man convert" for -resize and -monochrome parameters. It's even possible to use Gimp for this task. :-) > Kopete also supports a 200x200 pixel image, but I think it requires exactly > 200x200, so 128x96 won't work. You can use "!" with -resize to force a specific image size, even if it violates the source picture's aspect ratio (which -resize usually keeps). > I thought that someone said they used kamera to take a snapshot with their > webcam but Logitech webcams aren't listed. Maybe you can use gtkam / gphoto2 to talk to the Logitech camera? I don't own one because I'm familiar with the fact that they are not standard-compatible and that's why not supported. > I can take one with pwcview, which is what I was talking about above. You can even use a "regular" digital camera to take the photo, transfer it from the camera (or its CF or SD storage) and then postprocess it with ImageMagick. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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