Digital Image NoiseWhat you Need to KnowDigital image noise refers to random variations in brightness of color information within an image, much like static on a TV.
What is Image Noise?Digital noise manifests as tiny red, blue and monochromatic discoloration in a photograph. It's usually more noticeable in dark areas of the image, as well as areas with low detail.What causes Image Noise?Image Noise can be caused either by the environment or the camera itself.The smaller the physical size of the sensor and the more tightly-clustered the pixels are, the worse image noise will be. Generally, the more megapixels a camera's sensor has and the bigger the actual size of the sensor, the less noise will appear. Increasing the ISO dramatically ups image noise in your images, which is hard to remove during post processing. How can Noise Best be Managed?Most DSLR's have inbuilt noise-reduction systems. A word of warning though: These systems can reduce the image detail inadvertently when attempting to reduce noise.Ideally, noise can be managed best by keeping your ISO as low as possible. Only slightly increase it when shooting in very low light. If all else fails, noise can be dealt with in post-processing of your images, but that's not for the faint of heart as hours may be spent manipulating a single image! Is Image Noise ever Desirable?In some instances, image noise can be used creatively, for example to add the effect of old-world film grain to a shot.(From Digital Image Noise back to Basic Photography Tips Home) |
DSLR Buyer's Guide
Learn Photography
*New! Child Portrait Photography
Child Portrait Photography: Be Prepared!
Photography Courses
*New! Black and White Photography Gallery
Black and White Photography Gallery
About Me
Your Best Shot
Need a Website?
Popular Article
