Debluring and reducing noise at the same time
Debluring means reducing the blur in an image. It is generally done by sharpening. This in turn introduces noise. But, also denoising introduces blur. Doing both at the same time is not an easy task. What follows is a way of using reshade to help with this.
A noisy and blurry image of lizard skin
It is easily noticeable that when shrinking an image most of its (high frequency) noise and (low frequency) blur disappears. This observation is the main idea here. The image is downsized until both noise and blur are reduced to an acceptable level. Photoshop’s bicubic resize with “best for reduction” is used:
The task denoiseing and debluring is passed to the reshade algorithm. Here’s the upsized version starting from the above image (100 sharpen value):
Reshaded and upsize lizard skin
Some images look better than others when doing this, so varying the sharpen value and resize factor is very important. Try this out free with the online image resizer from reshade.com.
