Posts tagged “processing

How Do I Process My Images? Here’s One Example…

Wall, Seaholm Power Plant, Austin, TX

This is another post in response to the questions I got on flickr regarding these images of graffiti in the Seaholm Power Plant.  What I’m about to describe is certainly not the way I process all images — especially portraiture and the like — but it is typically the way I start with images like this one.  The image I’ll use as an example here is another one I never intended to post but again, it works well as a quick example of part of my processing.  There are lots of things which make this a lousy image but hopefully you can get past those for this illustration.

Here’s the original image with no edits:

Seaholm No Edits

Seaholm No Edits

I began by adding a slight s-curve in a curves adjustment layer (result is shown after the layers/curves snapshots).  Note that I masked out the red sign so that this curve didn’t affect it.  The blend mode is “normal” which results in additional saturation in the image.  The result is shown below the curve diagram.



After s-curve

Next I added a curve to adjust what the red sign (and a bit of the dark corners) looked like.  This curve was in “luminosity” blend mode to avoid changing the saturation.  Note the odd curve — since I was masking out most of the image I used a curve which only effects the part of the histogram related to the sign.  That curve would really wack out the image without the masking of course.  The end result is that the lettering stands out much more than in the previous image.

Sign curve

Sign curve

Sign-adjusted with curves

My final curves adjustment layer is what really gives the image a bit of pop.  The sign is masked out and I partially masked the dark corner to reduce the effect there.  The blend mode is “hard light”.  How did I pick that?  Trial and error — tried modes and curve shapes until I got an effect that I liked.  The final image is shown at the top of the post.  It was processed only with three curves layers — no sharpening, no saturation or vibrance adjustments, no Topaz Adjust, etc.  I call this kind of processing “a la Chromasia” (go check out his work and his tutorials — great stuff).

Final layers

The "dramatic" curve

That’s a typical start for me when I process an image like this.  Curves adjustments constitute 80%+ of my processing in general.  I certainly do play with saturation, vibrance, levels, sharpening, etc. but not until I’ve gotten most of the way to the final result using curves and masks.

If you subscribe to David Nightingale’s (chromasia) tutorials you’ll be able to go through some great teaching on how to approach the creative process.  He works his way through images and describes what he sees, how/why he wants to alter parts of the frame, etc.  My simple example in this post touches on maybe the first 0.5% of that…check out the tutorials.

How Many Exposures For An HDR?

HDR Entryway, My House 10mm, f/11, several exposures, ISO 100

I had a question on flickr regarding how I process (more detail) and how I pick how many exposures to use.  I don’t have a big technical tutorial to give but I’ll post a few comments and point to some links.

In the “mini hdr tutorial” link below I give some general thoughts along these lines and at the bottom of that post you’ll find links to several “real” HDR tutorials.  In the “using only the good exposures” post are some related ideas as well.  I’d sum up how to pick the number of exposures like this: “Use as many exposures as are required to show all the detail you wish to show”.  What does that mean?  First, you need to decide how much detail you want.  Do you want every detail in the shadows (I rarely do…eliminating too many of the shadows/blacks in an HDR generally results in “bad” HDR…just my opinion of course)?  Second, you need to be checking your LCD and/or histograms to make sure you take the range of exposures to get your highlights and shadows exposed “properly” (ie according to what you hope to get in the final result).  I *usually* try to get dark enough exposures to completely eliminate blown-out highlights but for my longer exposures I wing it — I decide when I’m done by chimping and just eyeball it.  Note that I don’t *always* try to prevent blown-out areas in the final image — it just depends on the look you’re going for (here’s a non-HDR example where blown-out highlights are purposeful –  The image above of my home’s entryway is an example of an HDR where I left in both blown-out highlights and some shadows.  This old image was simply an experiment and I never intended to show it, but it’s a good example for this post.  The blown-out window gives a fine sense of a very bright day and I feel no need to show any of the detail of what’s outside.  I have no recollection of how many exposures I actually used for the final image.

In this post ( I show an HDR where I took 3 exposures in the camera, but only ended up using 2 of them.

In this post ( I used 7 exposures.  What I didn’t say in that post is that I wanted to have a bit more shadow detail than my typical HDRs.  In this case I found that the image still “worked” (and worked better IMO) with less shadows due to the stark contrast between the very warm, yellow tones of the pasture beyond the cabins and the very cold, blue/gray tones of the shadows in front of the cabins.  It took those 7 exposures to get the desired range of exposures from bright sky to dark shadows.  I probably took more exposures than that but I don’t have access to my Lightroom catalog at the moment so I can’t verify that.  At the bottom of this post note that there are links to “real” HDR tutorials which you may find useful for further thoughts on choosing the correct number of exposures.

I’ll add some info on the other aspects of my (typical) processing in a future post.