You can paint bon de reduction hertz over individual parts of your subject with either a soft-edge or a hard-edge brush and it is possible to isolate areas that need or do not need noise reduction applied.
Auto ISO automatically increases and decreases the sensitivity of the sensor based on the amount of ambient light.
While there is not much I can do to help with the former, you can certainly fix the latter by changing the ISO level or maximum ISO level on your camera.
3) How to Reduce Noise in Camera.If you have any questions or comments, please feel free to drop a comment in the comments section below.Martin Luther King,.Thats where you could get a trashed image, where you will not only see a lot of noise/grain, but also bad colors and all kinds of artifacts in the image.If you took a dslr and a point and shoot camera and both have 10 megapixel sensors, the dslr would yield a much cleaner image with a lot less noise when compared to the point and shoot image.I will first explain what noise is and how you can reduce it in camera and then I will show how you can reduce it in post-processing, using Adobe Photoshop, Lightroom and commercial plugins for Photoshop.I can manually control the settings by telling the software the amount of noise I want to reduce and I can even specify which areas not to touch while applying noise reduction.I used 100 for the above example.Every digital camera is equipped with a sensor that collects light particles via very tiny buckets called photosites, which later become pixels in the final digital image.Here is what I used for my image: As you can see, Im applying some heavy contrast noise reduction at 150, then I dropped an exception point on the ducks head so that noise reduction does not affect.Here is how the final image looks like (move the mouse over to see the original.5) Reducing Noise in Noise Ninja The last tool I want to show you is Noise Ninja, perhaps the most popular tool among photographers today.

Here is a screenshot of the detail panel and some settings that I have used for my duck image: Lightroom has the following controls for Sharpening and Noise Reduction: Sharpening : Amount, Radius, Detail and Masking.
This is where the size of the sensor comes into play.
In many cases, noise degrades overall image quality and the above tools serve to help fix problematic photographs by removing noise from them.
Understanding ISO article that I wrote a while ago.
It is certainly more powerful than both Neat Image and Nik Software Dfine and offers many ways to fine-tune noise reduction.The second source of camera noise is the sensitivity level of the camera sensor, known as ISO in photography.Next, I went to Noise Filter Settings and I slightly increased Noise Reduction Luminance channel amount, then increased the sharpness of the image under Sharpening Amount to 40 and finally pressed the Preview button to see what my changes would look like: After I was.The great thing about third party noise reduction tools, is that they allow you to apply noise reduction selectively, meaning to only certain parts of an image.Those small dots might not be very noticeable when you look at the image on the back of the camera, but when you zoom in and view the image at 100 on your PC, they all of a sudden become quite visible.It has many more options than Lightroom and Dfine, but lacks Dfines ability to exclude certain areas of the image from getting touched (will probably be added in future versions).

I find that values between 40 and 60 work best in most situations.
If you want to give it a try, play with the settings and see what you can get.
For example, increasing ISO from 100 to 200 doubles the sensor sensitivity and could therefore result in more noise.