Aliasing
A Digital image is made up of square pixels and when the image is low resolution there are fewer pixels per inch This creates a rough step-like appearance that is most noticeable on diagonal straight edges This staircase effect is often ...
Anti-aliasing
Anti-aliasing makes the edges appear much smoother by averaging out the pixels around the edge.
Aliasing & Antialiasing
Aliasing, also known as moire fringing, describes the step-like edges that diagonal or rounded lines take on in digital images.
Aliasing
Techniques Glossary Aliasing
Digital images are made up of square pixels and when the image is low resolution there are fewer pixels per inch. This creates a rough step-like appearance that is most noticeable on diagonal straight edges.
Aliasing
(1) In computer graphics, the process by which smooth curves and other lines become jagged because the resolution of the graphics device or file is not high enough to represent a smooth curve.
aliasing
Errors introduced during the digitisation process, a result of the fact that digital recording of sound or image takes discrete samples as opposed to continuous measurements.
Aliasing - An effect caused by sampling an image (or signal) at too low a rate. It makes rapid change (high texture) areas of an image appear as a slow change in the sample image.
Aliasing. The jaggy edges that appear in bitmap images with curves or lines at any angle other than multiples of 90 degrees.
aliasing
Artifact produced on a pixel-based output device where diagonal or curved edges appear jagged.
alpha channel ...
Aliasing
Pixel-shaped curves on the diagonal edges of objects. This can sometimes occur since all graphics consist of individual pixels.
Aliasing: Condition when graphics, either constructed with lines (vectored) or dots (bitmapped), show jagged edges under magnification.
Alkaline Paper: Permanent papers (PH of 7.5 - 8.2).
Aliasing. This is an effect caused by sampling an image at to low a rate. It causes rapid change (high texture) areas of an image to appear as a slow change in the sample image.
Aliasing
Makes individual pixels visible, especially along diagonal lines and curves. Also known as staircasing or Jaggies because of the steps that appear. Lines and text look more jagged than smooth.
Aliasing - Distortions that may appear in diagonal lines of an image.
Alpha Channel - Information about pixels stored in images. This concept enables the storing of transparency information in images.
Aliasing A type of digital image distortion most often seen when straight lines or edges in a digital image are enlarged to the point at which they appear jagged. A/M A/M stands for Auto-Priority Manual Mode.
aliasing
a visual stair stepping of image edges caused by too low of a resolution for the size of the output.
Aliasing
The process by which smooth curves and lines that run diagonally across the screen of a low-resolution digital file take on a 'jagged' look as opposed to a smooth, natural rendition.
Aliasing
When a line or any shape (curve, circle or font text character) is painted, and its edges are not perfectly horizontal or vertical, some pixels are only partially covered. The resulting jagged-edged lines are said to be aliased.
Antialiasing
Antialiasing is the process of reversing an alias, that is, reducing the 'jaggies'. Antialiasing produces smoother curves by adjusting the boundary between the background and the pixel region that is being antialiased.
Anti-aliasing
The process of reducing stair-stepping by smoothing edges where individual pixels are visible.
Archival Quality
Suitable for long term stotage.
Anti-aliasing - A process used to remove the stair stepping effect found in diagonal lines of an image. Involves inserting dots of an in-between tone along the edges.
Array - A grouping of elements such as sensors.
Anti-Aliasing - Smooths out hard edges in a drawing by blending colors. This is especially apparent when applied to text.
Anti-Aliasing Filter (AA Filter)
This is an optical filter (also known as low-pass filter) placed on the sensor to create a slight blur or softening that helps counteract aliasing or moiré interference.
ANTI-ALIASING - Smoothing the edges of objects in a digital image to reduce the appearance of "stair steps".
ANTI-SHAKE - Technology that combats a lens's movement caused by camera shake to reduce blur in an image.
[edit] Aliasing
Aliasing can occur in optical and chemical processing, but it is more common and easily understood in digital processing.
What is aliasing and anti-aliasing?
Digital images are made by displaying tiny dots on a (usually) rectilinear grid.
Anti-Aliasing Filter; used in front of camera's image to reduce moire effects.
AC Adaptor
Converts AC Mains power to low-voltage DC for camera; very useful for prolonged indoor photography. The writer considers it a "must" for any digicam.
1, Color Aliasing
Because of the design of a digicam's CCD, the resolution isn't as high as it seems. Adjacent pixels in a digicam CCD are used for capturing different colors.
Figure 5: Anti-Aliasing
Comparing Figures 6 and 7 shows how interpolation actually reduces the jaggies. Figure 6 shows the original 500% enlargement (the image simply enlarged on the screen, not interpolated).
Also known as antialiasing, this is the electronic process of eliminating or reducing jaggies in an image.
spectral sensitivity:
The relationship between the radiant sensitivity and the wavelength of incident light.
Aliasing An image distortion caused by a sampling frequency that is too low in relation to the signal frequency. Where the sampling rate is less than twice the input signal's highest frequency content.
Moiré artifacts can be mitigated by a strong 'in camera' anti-aliasing filter and in software post processing. However, strong in camera anti-aliasing filters can soften the entire image so much that some of the finer image detail is lost.
Visibility of jaggies can be reduced by aliasing lines against their background so they look more like a smoother line.
'The Ails of Typographic Anti-Aliasing' - Tom Giannattasio
'Mastering Photoshop: Noise, Textures and Gradients' - Marc Edwards
'Better User Experience With Storytelling' - Francisco Inchauste ...
In order to prevent aliasing, an anti aliasing filter is being used, which impacts the sharpness.
The new problem then was that the digital sensor and the anti-aliasing filter in front of it did not reflect light the same way traditional film does.
The AF100 maximizes the potential of its high-resolution imager with built-in ND filtering and dramatically reduced video aliasing. Standard professional interfaces include HD-SDI out, HDMI, time code recording, built-in stereo microphone and USB 2.0.
This is also known as 'aliasing'. At higher resolutions these jaggies become nigh-on invisible but they can become evident in edges with sharp contrast - for instance a roofline against a bright sky - particularly if the image has been sharpened in ...
Most digital SLR cameras employ a Low Pass Filter (LPF) or Anti-Aliasing (AA) filter in front of the imager to help eliminate color aliasing (moire) problems.
A/D Converter ...
Low Pass Filter - Most digital SLR cameras employ a Low Pass Filter (LPF) or Anti-Aliasing (AA) filter in front of the imager to help eliminate colour aliasing (moire) problems.
What to watch out for: haloes, noise, and aliasing
Setting the variables
Recap: how to sharpen with USM ...
A scanned pixel may not be quite as good as a pixel captured directly because it's a second generation image (a picture of a picture) and there are the grain issues (grain aliasing for example).
Then it is again put through a series of electronic filters that adjust the white balance, color, and aliasing of the image. Next a compression cycle makes the image as small as possible by dumping unnecessary pixels, for more efficient storage.
It includes all the normal raw features including white balance, tint and exposure, along with hue, saturation and lightness and an RGB tone curve tool. It produces high quality demosaiced conversions with good detail and very few if any aliasing, ...
I put the black layer above the white layer then changed the opacity of the white layer to about half. In the full size 'print' version of this picture the lines look quite realistic, but the anti-aliasing doesn't work too well on the screen size ...
 See also: Image, Digital, Photograph, Available, Software
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