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In a previous blog (Don’t Let Noise Kill Your Images) I wrote about the steps you could take to minimise noise in your images. It’s long been recognised that cameras with small sensors have higher levels of noise than they would if they had a larger sensor as a result of packing more pixels into less space. Whilst there have been great advances in this area, it can still be a problem.
If I look at the images produced by my GX1 (16Mpixels) and compare these to images shot on my GF1 (12Mpixels) both of which have the same sized sensor, I can see real improvements in the GX1 both at base and higher ISO levels. I would say that I am examining the images in great detail for any trace of noise in case you think these cameras are poor performers. To give you something to compare against, when I do this for check with my 5D MkII I can also pick out noise at ISO100 in dark areas and in the Blue channel. So what do you do if you find you can’t avoid capturing noisy images?
In the past I have used a noise reduction tool called Neat Image but to be honest it’s quite a lengthy process to get good results and whilst it has a batch mode, I prefer to fine tune the software to each image (hardly a lightweight processing workflow). This weekend however I decided to download a trial of DeNoise from Topaz Labs and the Noise reduction plug in from PhotoWiz (I already use Contrast Master, B&W Styler and Focal Blade plug-in and rate these highly). The results were a bit of a surprise.
I found both solutions did a better job than Neat Image however the PhotoWiz product took some time to process my sample image, something I want to avoid. Comparing this with the performance of Topaz Labs DeNoise solution I found a huge difference. DeNoise was incredibly fast to process my image but it also gave the cleanest and most lifelike results. Finding the right level of reduction was as simple as moving one slider but it was then possible to further fine tune the results. It gave me lots of control in an interface that was very easy and fast to use.
I want to experiment further before purchasing, but early results look very promising.
Creating a Lightweight Photoshop Workflow
Rough seas, Norway, March 2012
Copyright: Robin Whalley 2012
Last night I was the guest speaker at a Camera Club; something that I like to do a number of times each year in order to share my knowledge, but also to pick up information from others. The event went well and the presentation I delivered was entirely new, not only in content but in approach. The real innovation for the session was that I demonstrated how I use Photoshop to craft my images.
What became apparent from talking to people after the event was that my workflow in Photoshop was quite minimal yet achieved a lot. You see I have standardised my approach to be adequate for around 95% of my images and most of my changes can be applied in just a few minutes. Sure some of the better images I will spend longer on, but only if the additional effort is justified.
Here then is my approach:
- Clean up the image by removing dust spots etc on a new empty layer. I do however try to keep my sensor clean by using an Arctic Butterfly brush so that any cleanup work is minimal.
- Use a Curves adjustment layer to adjust brightness
- Use a curves adjustment layer to adjust contract
- Use a saturation layer to adjust saturation
- Add a new empty layer and stroke the image to create a frame
Whilst I didn’t demonstrate it last night I have created an action in Photoshop to automate the addition of the above layers so that all I need do is activate the action using Ctrl-F3 (which is the key combination I have assigned).
Consider also that all my adjustments are on layers which give rise to a number of benefits:
- I can turn the layer on or off to hide the effect
- I can adjust the opacity of the layer to control how strong its effect is on the image
- Each layer has a blending mode that you can use to make further enhancements
- Each layer has a layer mask attached to it which I can use to target the adjustment onto a specific area of the image
Once I am happy with the image I create a new consolidated version from all the layers by pressing Shift-Ctrl-Alt-E. I then sharpen this for output e.g. for paper or for the screen. My finished image is then saved as a PSD file with all the layers remaining in place. Again this gives rise to timesaving benefits:
- Each time I output the image to new media I can create a version of the image with the correct level of sharpening and simply turn off the other layers
- I can create modified versions of the same image e.g. versions with and without the frame
- If in a couple of weeks I decide I was a little heavy handed with one of the adjustments e.g. saturation, I can simply adjust the opacity of the relevant layer to control the effect
- If I later decide to work on the image further I have all my earlier layers already in place and ready to enhance further
By following my approach I find that I minimise the total time I spend on each image whilst achieving good results.
Copyright: Robin Whalley 2012 www.thelightweightphotographer.com
See more of my work at www.lenscraft.co.uk