Blog entries tagged with "gimp"

I like automatic perspective correction

Monday, June 2nd, 2014 at 11:11 pm

As a rule I try to avoid spending too much time post-processing my photos which is why I have been generally satisfied with the simple (compared to full Photoshop) adjustment tools within Lightroom. There are of course the occasional exception to any rule.

I have mentioned before about how I went from this (as-shot) image of the Albury train station:

Grand old station

to this brightened, sign and chimney removed, and perspective corrected image:

Grand old station (modified)

What I said in the previous post wasn’t quite correct, I actually cloned out the signs and added a gradient before I decided to try to correct the perspective using GIMP. I recall that this took about an hour to figure out how to do, then the image went back into Lightroom to clone out the third chimney and some final tweaks.

That was two years ago. Today in version 5 of Lightroom is a perspective correction tool. You don’t have full control to change the perspective, instead it is a couple of correction settings that work in an automatic way. Since it was introduced it has been a very handy tool.

I don’t know why, but a few days ago I thought of this image and wondered how the built in perspective correction would do. So I went to the original image in the Library (ie all the edits up to the point it was exported to TIFF for GIMP), made a virtual copy, clicked the ‘Vertical’ perspective button, recropped and then cloned out the third chimney to arrive at:

Grand old station (modified 2)

If you open both modified images and swap between them you can see that the only difference is a slight difference to the proportions of the building. But when you consider one was a few seconds to click a button while the other was at least an hour and then the change history is split across two files, I am glad that Lightroom now has built in perspective correction.

I am also hoping that over time the perspective correction tool is expanded into something like the Adaptive Wide Angle filter from Photoshop. While I am wishing for things, I would also like Lightroom to get content aware fill…

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A heavily worked image

Wednesday, May 2nd, 2012 at 8:40 pm

Two years ago I took this photo of the Albury railway station:

Grand old station

However the version I submitted in the May competition at the camera club was the result of a few hours of processing, the most processing I have ever done to an image:

Grand old station (modified)

I first took the image out of Lightroom and into GIMP where I “corrected” the perspective. You know, to make the verticals vertical. I also stretched it vertically because it was looking a bit squashed.

Once back in Lightroom I began to liberally apply the spot removal tool to remove the parking signs and one of the chimneys, the goal being to make the image symmetrical. My final changes were to add a gradient to bump up the exposure of the bottom half and an overall change to the levels.

I entered the image as a print, which the judge awarded a highly commended.

I also recieved highly commendeds for two other images, both from the Perth road trip and both entered as EDI. First was this image of the red earth and blue skies near Marvel Loch:

Red and blue

Second was this image of water pooled on some rocks in the desert:

It rained recently (modified)

This second image was also modified from when I first posted it to Flickr, it is a different crop, contrast has been increased and a gradient applied to the sky to bring out the clouds.

My final image featured the regrowth on the trees near Marysville, burnt in the Black Saturday bushfires:


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