Brenizer for Impatient people!!!

dlacouture · 01-18-2011, 05:47 PM

Well, you all know about the Brenizer method (else, Google is your friend!).

What I thought about while spending some time marooned in my bed after a surgical operation is the following: taking so much shots is a major pain, so why not fully using all those bells and whistles of my new K5, namely, the vidéo mode????? 30fps sure rocks for this!

So I shot a 26s clip handheld (still from my bed, so nothing great!), extracted 1fps from it and stitched the result...

So, here is what my FA50/1.4 sees from my pillow:

And the result:

Took me about 2 minutes from recording to final image... You can see some stitching errors, but for a quick test lying in bed under pain killers, it's not bad I think!

I used ImageMagick for extracting:

ffmpeg -i MyMovie.AVI -y -an -r 1 -sameq test%03d.jpg

And Hugin to stitch the 26 Testxxx.jpg frames... In the end I even removed half the frames as they were overlapping too much...
The end image is 2893x3510...

From my calculation, I ended with a shot taken with either:
- a 645D with a 50/1.4...
- or an APS-C 21mm f/0.5 (!!!)

song_hm · 01-18-2011, 08:56 PM

Cool technique! I have to try this sometime.

dlacouture · 01-19-2011, 10:22 AM - **1 Like**

Okay, I've tried some outdoor shot...

One-shot with the FA50/1.4:

Same view, stitched from a 200/2.8 video clip:

From my calculation, this is the equivalent of a 6x9 camera fitted with a 200/2.8 lens...
Or an APS-C 50mm with an incredible aperture around f/0.7!

The resolution is quite big : 28MP...

VaughnA · 01-20-2011, 08:13 PM

Thanks for the tip on the technique. I tried it with full size stuff today and it took FOREVER to stitch and still had some pretty glaring stitching errors but it really shows potential. I'm going to have to give this another try. I'm thinking that I'll go with lo res jpegs in the future. The finished result was 220 Megapixels! Any suggestions on a good stitching tool?

dlacouture · 01-20-2011, 08:35 PM

Cool shot!!!

Well, I'm using Hugin, it works quite well.

Yeah, low-res is the way to go, as even 2MP pics quickly add up...

The real benefit of using the video mode instead of individual snaps is that you follow the progress, and can easily take reference points while panning.

**jbinpg** · 01-21-2011, 01:07 PM

Did you shift the WB to yellow in the 200mm stitch or is the lens just that much warmer than the 50?

dlacouture · 01-21-2011, 01:57 PM

50 was taken in AWB, 200 in cloudy WB (as you have to set a WB in order to avoid WB shifts)...

01-18-2011, 05:47 PM	#1
dlacouture Veteran Member Join Date: Jul 2008 Location: Var, South of France Photos: Albums Posts: 1,074	Brenizer for Impatient people!!! Well, you all know about the Brenizer method (else, Google is your friend!). What I thought about while spending some time marooned in my bed after a surgical operation is the following: taking so much shots is a major pain, so why not fully using all those bells and whistles of my new K5, namely, the vidéo mode????? 30fps sure rocks for this! So I shot a 26s clip handheld (still from my bed, so nothing great!), extracted 1fps from it and stitched the result... So, here is what my FA50/1.4 sees from my pillow: And the result: Took me about 2 minutes from recording to final image... You can see some stitching errors, but for a quick test lying in bed under pain killers, it's not bad I think! I used ImageMagick for extracting: ffmpeg -i MyMovie.AVI -y -an -r 1 -sameq test%03d.jpg And Hugin to stitch the 26 Testxxx.jpg frames... In the end I even removed half the frames as they were overlapping too much... The end image is 2893x3510... From my calculation, I ended with a shot taken with either: - a 645D with a 50/1.4... - or an APS-C 21mm f/0.5 (!!!)

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01-18-2011, 08:56 PM	#2
song_hm Veteran Member Join Date: Dec 2006 Location: Pennsylvania, USA Photos: Gallery \| Albums Posts: 797	Cool technique! I have to try this sometime.

01-19-2011, 10:22 AM - 1 Like	#3
dlacouture Veteran Member Join Date: Jul 2008 Location: Var, South of France Photos: Albums Posts: 1,074 Original Poster	Okay, I've tried some outdoor shot... One-shot with the FA50/1.4: Same view, stitched from a 200/2.8 video clip: From my calculation, this is the equivalent of a 6x9 camera fitted with a 200/2.8 lens... Or an APS-C 50mm with an incredible aperture around f/0.7! The resolution is quite big : 28MP...

01-20-2011, 08:13 PM	#4
VaughnA Banned Join Date: Feb 2009 Location: Virginia Photos: Gallery \| Albums Posts: 1,363	Thanks for the tip on the technique. I tried it with full size stuff today and it took FOREVER to stitch and still had some pretty glaring stitching errors but it really shows potential. I'm going to have to give this another try. I'm thinking that I'll go with lo res jpegs in the future. The finished result was 220 Megapixels! Any suggestions on a good stitching tool?

01-20-2011, 08:35 PM	#5
dlacouture Veteran Member Join Date: Jul 2008 Location: Var, South of France Photos: Albums Posts: 1,074 Original Poster	Cool shot!!! Well, I'm using Hugin, it works quite well. Yeah, low-res is the way to go, as even 2MP pics quickly add up... The real benefit of using the video mode instead of individual snaps is that you follow the progress, and can easily take reference points while panning.

01-21-2011, 01:07 PM	#6
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 2,959	Did you shift the WB to yellow in the 200mm stitch or is the lens just that much warmer than the 50?

01-21-2011, 01:57 PM	#7
dlacouture Veteran Member Join Date: Jul 2008 Location: Var, South of France Photos: Albums Posts: 1,074 Original Poster	50 was taken in AWB, 200 in cloudy WB (as you have to set a WB in order to avoid WB shifts)...

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