Category Archives: Computing

Colour histogram and reticle for Linux capture app

Posted on October 18, 2013 by james

Progress, progress… Here’s my reticle and the colour version of the histogram. I may add some options for changing the style of the reticle and splitting the histogram into three, but those are for later. I also killed a few … Continue reading →

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Mono histogram for capture application

Posted on October 17, 2013 by james

I have the histogram working for mono cameras now. Colour is more work, but that will follow shortly. It doesn’t look too exciting mind.

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ASI120MM capture support

Posted on October 16, 2013 by james

Here’s capture support working in my new application for the ASI120MM, together with binning. I’m really not sure what use binning is for high frame rate image capture, but it works anyhow.

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Troubles with the ASI120MC

Posted on October 16, 2013 by james

I started getting some problems with data from the ASI120MC in my capture application, with the image “tearing” or undebayered data appearing in what ought to be debayered frames as in these two examples: It turns out that the problem … Continue reading →

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ASI120MC capture support

Posted on October 15, 2013 by james

I’m now able to get an image from my ASI120MC: The colour is all wrong. It turns out that whilst the header file gives the image format define as “RGB24”, it’s actually BGR24. I can probably write them to an … Continue reading →

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A new Linux planetary capture application

Posted on October 15, 2013 by james

Astronomy-wise it’s been a fairly rubbish last month and a half. Here in the back end of beyond it’s been nearly permanently cloudy and there have been periods of several days where there’s been no hint of blue sky. In … Continue reading →

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Adobe ripping off UK users?

Posted on May 8, 2013 by james

I read on the BBC News website yesterday that Adobe was moving to subscription-based charges for its software and “Creative Cloud” (whatever that means). If you’re in the UK though, it seems like you get stitched up on the pricing … Continue reading →

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Keeping recordings and DVB channels when moving MythTV

Posted on September 28, 2012 by james

Thanks to a server dying I’ve been moving my MythTV installation to a new system. I wanted to install from scratch to clean out a load of old settings and other data that have been hanging around for years (I’ve … Continue reading →

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Clearing BIOS RAID metadata for CentOS6 install

Posted on September 28, 2012 by james

Today I was trying to install CentOS6 on a server put together from bits and pieces I had lying about. The CentOS installer would not include either of the disks I’d used because it claimed they had BIOS RAID metadata … Continue reading →

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Nginx Rate-limiting with a Whitelist

Posted on August 2, 2012 by james

I recently needed to deploy a rate-limiting solution for a site where certain IP addresses would be white-listed and not subjected to the rate limits. Google found me an example in a blog that turned out not to work, though … Continue reading →

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