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.