Free noise software for mac

NDNoise is a Java-based freeware that enables to remove noise in digital images.
Main features:
- load / save multiple image with the same filter tuning
- multiple image format support : PNG, JPEG, GIF, ... (prefer lossless PNG compression !)
- 3 sliders tuning for basic use : noise removal, dots/spots/lines smoothing, retexturing
- direct visualisation of filtering effect by alternate visualisation
- zoom in/out at any level.
Enhancements:
- Post sharpening
- Partial evaluation for fast preview.

Noise Maker is a freeware tool that will generate a RGB/grayscale noise map.

White Noise Screensaver is an impressive and unique screensaver which will catch your attention immediately.

Get the screensaver for this supernatural thriller. Michael Keaton plays a grief stricken husband morning the unexplained disappearance of wife. When a man claiming to channeling his late wife approaches him, the door to another world is opened.

AbsoluteDeNoiser is an easy to use software that produces very competitive noise reduction filtering for digital images.
AbsoluteDeNoiser is Java-based software that should run on almost every machines.
Digital cameras or scanners often produce images that contains noise, especially when using high ISO. This noise is made of random pixel variations that damage the picture in different manner, adding unwanted granular effects. To obtain a good result, this noise should be removed paying a great attention to :
- Image details that often can be removed with noise, and edges definition that are often blured by basic noise reduction technics.
- Keeping some granularity to avoid the common "plastic" effect of too much noise removal.
AbsoluteDeNoiser (Free version) works in 3 steps :
- Edges detection : this analyse makes a separation between large surfaces with poor details, and places where some edges and/or details require a special attention. The value to tune enables to decide the sensitivity of the edges detection, thus the amount of the picture that is to be considered as details/edges or not. Surfaces and edges will then be processed in different ways in next steps.
- Surfacing : performs a calculation of local color cohesion to decide, for each pixel, what is the mean color value in the noise variations arround it, without merging two different surfaces together. This step also processes surfaces and edges in two different ways. The more important is the value that tunes the surface managment : it is the one that decides of the effective noise reduction. There is also a secondary value that tunes the edges managment, but it should often be kept at a low value to avoid bluring edges : in some cases it offers the possibility to reduce some edges pixelisation effects.
- Texturing : the step 2 may provide with "too" clean surfaces where some small details or textures could have been lost, and possibly a "plastic" effect. This final filter decides the amount of original pixels that should be added back to the clean surface to restore details and textures without re-introducing the noise that should be removed. A first value tunes how much part of pixels that was removed in step 2 shows a local regularity, thus how much noise vs details is to be considered on them. There is also a secondary value that tunes how much pure granularity, without special regularity, should be added back without re-introducing bad strong spots and scratches.
Enhancements:
- New installation using a zipped bundle to fix a memory configuration trouble.

SnoreSaver is a totally pointless screen saver that blanks the screen and then causes your computer to play snoring noises. Not much use other than to put onto other unsuspecting peoples computers as a practical joke.

Completly freeware.

Mister Hankey is a screensaver module, based on the South Park character.
Mister Hankey is a screensaver module for Mac OS X 10.0 or greater.
Mister Hankey is a character from the South Park animated television series. His chirpy voice and unique nature make him a viewer favorite. In this screensaver, Mister Hankey bounces jauntily around your screen, making noise and leaving his mark wherever he lands!
Enhancements:
- This is primarily a bug-fix release; Mister Hankey didnt much like the smell of panthers and tigers, but now Ive set him straight.
- This version is compiled as a "Universal Binary", and should work on Intel Macs, at least the developer machines Apple has shipped in 2005...

Requirements:
Microphone, shortwave or amateur radio