There are 3 posts tagged with quebec.

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Tripod

2008-03-11 Tags: ,

Here I am, in Québec City for a week, with not much to do but to eat poutine and to take pictures. I decided to get up early and to sneak up on some unattended roof in order to catch the sun rise. Well... It's quite fortunate that I discovered align_image_stack because it seems that I'll have to do without a tripod.

In case the glare prevented you from noticing, my crazy tripod lost its head.

Toward a better HDR pipeline

2008-03-10 Tags: , ,

I hacked on my HDR pipeline. What I have now provides some automation but it's still really fragile and generally ugly. Nevertheless, I can now process a few gigabytes of pictures without clicking like crazy until I get RSI.

The first part was to automatically combine multiple exposure into HDR images. Discovering which pictures are multiple exposure of the same scene is theoretically quite easy. All the exif tags should be the same except for the exposure, which should be decreasing, and the time spawn of all the pictures should be no more than exposure time plus shutter lag. It gets complicated when you add the fact that my camera sometimes implements bracketing by decreasing ISO sensitivity instead of shortening the exposure time. That and PIL's miserable support for exif.

Quebec City

2008-02-26 Tags: , ,

Back from Québec City where I visited my brother's brand new child, Charlie Gingras.

Thanks to the convenient location of the bus station, I had the occasion the take a few pictures of the Vieux-Québec.

This is my first serious panorama. I scanned the scene in program shift mode, compute the average exposure and shot with brackets in full manual mode. I aligned the images with autopano-sift, stitched with hugin, blended with enblend, tone mapped with qtpfsgui, and post processed with the Gimp. Be sure to have a look that the full size version before you decide if you like it or not.

I don't know how to get rid of the stitching lines in the sky; maybe I should just replace it with a gradient. I'm satisfied with the post processing but I have a lot of work to do on composition. Not too bad for a first attempt.