This is a list of imaging terms I have been collecting off the web, if anyone can add to it or better help describe it it would be great. I am using my own definition of Noise and Artifacts here-it is most likely many would not like this distinction, but I find it usefull in classifying these affects. By NOISE I mean any non-image affects that occure between the sensor chip and wrighting of the RAW file. This includes the cameras circuitry and any algorythens used to make the resulting file(s)-anything that can negatively affect the fidelity of the recording process from the moment the light is recorded to the moment the digital negative is produced. By ARTIFACTS I mean any class of non-image changes introduced by the lenses or post-processing of the RAW file. As the term implies, the effects of these various manipulations of the RAW file can leave visible affect (artifacts) within the image information throughout the workflow. "Purple Fringing" usually refers to a typical digital camera phenomenon that is caused by the microlenses. "Blooming" is a type of noise where an excess of charge flow over to surrounding pixels, brightening or overexposing them in the process. "Pixilation Noise" (jaggies/aliasing) is due to insufficient image information/resolution for the required output. This type of information loss is part of the restrictions of the CMOS chip used to record the image. "Pixilation Artifacts" (jaggies/aliasing) is information loss idue to post-production down sampling. "Chromatic aberration" or "color fringing" is an artifact caused by the camera lens not focusing different wavelengths of light onto the exact same focal plane. "Maze Artifacts" are moiré patterns caused by the camera's internal image processing to generate "maze" like patterns. If this is post-processing of the RAW file in-camera, I think it should be consdered an Artifact, if it is done as part of making the RAW file it should better be described as noise. "Moire Patterns" If a scene contains areas with repetitive detail which exceeds the resolution of the camera (1), a wavy moiré pattern can appear. This may be a type of noise, but a unique class for sure. "Sharpening Halos" the affects of ﾓDigital resolution" where sharpness is faked by making the edges more contrasty. "Luminance Noise" fluctuations in luminance across different channels-monochromatic grain, similar to film. "Color Noise" or "chromaﾔ noise is not luminance noise, but I do not have a good definition here? "Posterization" is an artifact that occurs when an image's apparent bit depth has been decreased so much that it has a visual impact. a loss of continuous tone information. "Color fringing" is this really different than "Chromatic aberration"? "Channel noise" is random spikes in long exposure modes. "Barrell distortion" is the distortion of actual pixel information due to the effects of lenses without proper coating. Random noise is characterized by intensity and color fluctuations above and below the actual image intensity. There will always be some random noise at any exposure length and it is most influenced by ISO speed. The pattern of random noise changes even if the exposure settings are identical Fixed pattern noise includes what are called "hot pixels," which are defined as such when a pixel's intensity far surpasses that of the ambient random noise fluctuations. Fixed pattern noise generally appears in very long exposures and is exacerbated by higher temperatures. Banding noise is highly camera-dependent, and is noise which is introduced by the camera when it reads data from the digital sensor. Banding noise is most visible at high ISO speeds and in the shadows, or when an image has been excessively brightened. Banding noise can also increase for certain white balances, depending on camera model. "JPEG artifacts" (JPEG compression artifacts) Artifacts in digital images are unwelcome and unnatural elements or distortions. "Interpolation Artifacts" any type of non-image information used to upsample image date. This is all I could find, do you know of more or have better definition to use?