Absolute Colorimetric

Rendering intent, generally used for proofing. Based on a device-independent color space, reproducing colors within the available gamut perfectly, and reducing colors outside of the gamut to the nearest reproducible hue (at the expense of saturation).

ACD InTouch

Data exchange service for staying in touch with new developments at ACD Systems.


Often used term to describe the process of locating images on peripheral devices (such as scanners and digital cameras) and adding the images to your hard drive. Can also refer to taking screen captures. See import.


Collection of images, often organized by theme or event. In ACDSee 12, albums contain shortcuts to where the images are stored on your hard drive.


Jagged edges caused by pixels. Occurs most often in low resolution images or images that have been enlarged. See jaggies.


Method of fixing an object such as a selection to a screen, page, or image location.

antialiasing, anti-aliasing

Software technique for reducing jagged lines, or ‘jaggies’. Uses shades of gray and color to smooth out the contrast between adjacent pixels.

aspect ratio

An image’s width-to-height ratio. For example, an image with an aspect ratio of 3:1 has a width 3 times larger than its height.


Collection of files saved as a single file for storage. Archive files usually use compression to reduce their size. You can use archiving software such as ACDSee 12 and ACDZip to create and view archives.


Angle of shadows that extend from the edges of image details. In ACDSee 12 you can control azimuth when applying the Emboss effect to an image.

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background processing

Tasks or programs that function without user interaction.


Amount of data that can be sent through a network connection in a fixed amount of time. Bandwidth is measured in kilobits per second (Kbps).

barrel distortion

In barrel distortion the photo appears to bulge outwards from the center.

batch editing

Any operation or tool, such as resizing, converting, or renaming, that can be used to adjust multiple images or files simultaneously.


Bits are small units of computer memory. The color depth of your image is constrained by the number of bits available to store color information. For example, it is possible to store 256 different color values per color channel in 8-bit RGB images. Similarly, it is possible to store 65,536 different color values per color channel in 18-bit images.


An image’s darkest area. You can control the intensity of the black in an image by adjusting its blackpoint.

blend modes

Filters that change the effect of a tool or the appearance of a selected object.


Light intensity of an image. You can make an image appear brighter or darker by adjusting its brightness.

Manage mode

Manage mode is what you see when you start ACDSee 12 using the shortcut icon on your desktop. In Manage mode, you can find, move, preview, and sort your files, and access organization and sharing tools.

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High-speed storage mechanism. The ACD Systems Database is a cache.


Text associated with a file, or a comment or description added to a printed image.


Adding file information to the ACDSee 12 database.


Assign categories to photos to help sort and manage them more easily.


Color model that uses cyan, magenta, yellow, and black (key) as its primary colors.

color cast

Changes the hue of an image while keeping the saturation and brightness intact. For example, many digital cameras produce pictures with a slightly blue color cast. ACDSee 12 includes a tool that removes an unwanted color cast.

color channel value

Contains all pixel information for a single color. A grayscale image has one channel, while an RGB image has three channels. You can adjust RGB values when editing a color.

color gamut

Range of colors that a device such as a printer or monitor can produce or display.

color management

Process of adjusting your computer settings so that the color output from your printer matches the colors you see on your monitor.

color space

There are two types of color spaces: device-independent or device-dependent. A device-independent color space, such as RGB, describes all possible colors. A device-dependent color space describes the subset of colors (from the device-independent color space) that a particular device can reproduce. Device-dependent color spaces are used to map colors between devices (for example, from a monitor to a printer) to ensure that colors are reproduced accurately.


Process that converts data to a storage format requiring less space than the original data.

contact sheet

Physical or
digital page that contains a series of small images, usually in a grid format.


Measure of an image’s color and brightness differences.


Change a file from one format to another. For example, you might convert a file from a bitmap (.bmp) to a JPEG (.jpg) to reduce the file size.


Removing unwanted image areas.

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Electronic filing system that provides fast access to stored data. The ACD Systems Database contains two parts: a cached thumbnail file and an information file. The cached thumbnail file contains small copies (thumbnails) of the images on your system. The information file contains details about the files on your system, such as descriptions, dates, authors, notes, keywords, and categories.

database date

Date that you apply to the properties of a file and save in the ACD Systems Database.


ACDSee 12 stores descriptions in a hidden file named descript.ion. Descriptions such as file name and captions for an image will be included in the descript.ion files.


Attaching a toolbar, window, or pane to different screen areas.

DPI (dots per inch)

Measurement of an image’s display resolution. For example, 92 DPI means 92 dots horizontally and 92 dots vertically, which equals 8,464 dots per square inch. More dots per inch result in higher resolution and image quality.

dynamic range

The dynamic range of an image is directly related to the dynamic range of your digital camera’s sensor. If your digital camera’s sensor has a large dynamic range it can capture the darkest shadows and brightest highlights at the same time, without clipping the shadows or highlights. (RAW images preserve the dynamic range of your digital camera’s sensor.) Adjusting the tonal range of the image changes how the dynamic range of the image is represented on a monitor or in a photo.

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Height of an imaginary light source over an image. The elevation of the light source works in conjunction with azimuth to generate a three-dimensional emboss effect.


Writing (or saving) a file format.


Method of converting data into a secure format. You need a digital password or key to read an encrypted file.

EXIF (Exchangeable Image File)

Standard for storing information, primarily with images that use JPEG compression. Most digital cameras create EXIF information and embed it in the image file. For example, EXIF information can include details about shutter speed and whether a flash was used.


Moving data from one application to another. The exporting application places the data in a format that the other application understands.


Exposure is the amount of time that your digital camera’s sensor is exposed to light.

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Softening image edges to blend them into the background.

file listing

In ACDSee 12, a report of the files currently displayed in Manage mode.

file format

Medium for encoding information in a file. Each type of file has a different file format that specifies how it organizes the information it contains.


Program that can apply an effect to an image, such as an embossed appearance or a sepia tone.

fisheye distortion

In fisheye distortion, the photo appears to bulge outwards from the center, as if the photo were wrapped around a sphere.

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Range of color values a monitor, scanner, or printer can display. Adjusting this value increases or decreases the intensity of the light spectrum.

grayscale image

Image composed of different shades of gray.

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Highlights are the brightest or whitest parts of an image.


A histogram is a graph that displays the dynamic range of shadows and highlights in an image.


An acronym for hue, saturation, and lightness.


Predominant color in an image.

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image editor

Program that you can use to create and edit images. ACDSee 12 is an image editor.

image resolution

Quality of image details and colors. Also used to describe the quality of monitors and printer output.

image viewer

Program that displays images. ACDSee 12 is an image viewer.


Bringing data into an application from another using a format that the receiving application understands.


Process that uses nearby pixels to estimate the color of new pixels added to the larger image. For example, interpolation might be used when enlarging a digital image.


Standard method of encoding information within image files so that items such as descriptive comments and copyright information can be transmitted with the image.

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Individual pixels displayed in an image with low resolution. The appearance of pixels in an image causes lines and curves to appear jagged.

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lossless compression

Form of compression that retains all image data and quality.

lossless rotation and flipping

Rotation of a JPEG image without loss of image quality. This works best on images with dimensions that are a multiple of 8 or 16.

lossy compression

Form of compression that attempts to remove unnecessary data. This data loss can affect image quality.

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Dashed-line frame that identifies a selected portion of an image. Depending on the tool, you can resize or move a marquee with or without changing the underlying image.


Information about an image and how it was taken. For example, the metadata of digital camera images can contain the date and time the picture was taken, the shutter speed, the exposure settings of the camera, and whether a flash was used.

monochrome image

Image containing a single color.

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Effect produced when a variety of pixel colors are used in the same color region. Noise often occurs in images with high ISO setting or slow shutter speed.

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Determines how visible an effect is when applied to an image or a selection. High opacity produces a more solid effect, while low opacity results in a nearly invisible effect.


Images that are overexposed have too many highlights, and tend to look faded. You typically overexpose images by exposing your digital camera’s sensor to light for too long.

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Moving zoomed images vertically, horizontally, and diagonally across the display area to view specific areas of the image.


An acronym for Portable Document Format. You can view PDFs on any computer using the free Adobe Reader software.


Rendering intent that scales all of the colors within one gamut to fit within another gamut. Best used for photographic images, as it maintains the relationship between the colors more accurately than the colors themselves.

photo album

See album.

photo editor

See image editor.

pincushion distortion

In pincushion distortion the photo appears to shrink inwards toward the center.

pixel (PICture ELement)

Smallest visible portion of a digital image, arranged in rows and columns.


Software module that adds functionality to a larger program.

PPI (pixels per inch)

Measurement of how an image is displayed. More pixels per inch result in higher image quality.


A preset contains image correction settings. You can create and use presets to ensure that settings you apply are the same and consistent across all images.

primary colors

Colors that can produce other colors when blended. For example, in the RGB color model, red, green, and blue are primary colors.

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raster image

Image composed of a rectangular grid of pixels. Each pixel contains a defined value about its color, size, and location in the image. As a result, resizing the image can affect its quality.


Assign ratings (1, 2, 3, 4, 5) to photos to help sort and manage them more easily.


An image file format. RAW files contain all of the image data that was captured by your digital camera’s sensor. RAW files are not processed by your camera; instead, you must process RAW images using a photo editing program such ACDSee Photo Manager Pro 3.


Program or task that can repeat itself indefinitely, such as a slideshow.

red eye

Red eye occurs when the light from your digital camera’s flash reflects off the retinas in the subject’s eyes. The subject’s eyes look red instead of their normal color.

Relative Colorimetric

Rendering intent that maps the colors that fall exactly within the color gamuts of both the input and output devices. Best used for single- or limited-color images as colors outside of both gamuts may be mapped to a single color.


Drawing images to your screen.

rendering intent

Approach used to map colors from one color gamut to another. There are four rendering intents available: Perceptual, Relative Colorimetric, Saturation, and Absolute Colorimetric.


Quality and clarity of an image, measured in pixels, dots per inch, or pixels per inch.


model that uses red, green, and blue as its primary colors.

ringing artifacts

Distortion around the edges of image subjects, caused by compressing or resizing an image.

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Purity of a color. Higher color saturation results in more gray.

Saturation (rendering intent)

Rendering intent that maintains color saturation from one gamut to another. Best suited for images in which the actual color represented is less important than the color’s vividness.


Portion of an image that you define with a selection tool. A marquee surrounds a selection. ACDSee 12 and ACD Photo Editor include selection tools.


ACD SendPix is a free, electronic photo sharing service offered by ACD Systems.


Sepia-toned images are composed of shades of brown. Many old photographs have a sepia tone.


The sharpen tool is for sharpening images. The original image is blurred slightly. This blurred version of the image is subtracted from the original image, revealing the edges in the original image. These edges can then be sharpened by increasing contrast.


The sharpness in an image is determined, primarily, by your digital camera’s lens and sensor. You can also create the illusion of sharpness by increasing the contrast between edges within an image.

shortcut menu

Menu that appears when you right-click within a program. Sometimes referred to as a context menu.


Automated sequential display of images. You can use slideshow software such as ACDSee 12 to display slideshows of your images.

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Tagging, like categories and ratings, is a great way to organize and group your photos without moving the files into different folders. You can tag a photo with one click. Similarly, you can display all tagged photos with one click.


Small preview of a full-sized image.


Date and time associated with a file.


TiVo is a television recording device and service. You can publish your digital photos from ACDSee 12 to your TiVo device and view them on your television.


Special effects used between images or video segments in slideshows, screensavers, and videos.

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Images that are underexposed have too many shadows. Images typically become underexposed if you don’t expose your digital camera’s sensor to light long enough.

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vector image

Image consisting of individual objects rather than pixels. Mathematical equations define the objects. You can adjust the size of a vector image and the image will retain its clarity and quality.

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Background text or graphics added to an image, usually to provide copyright protection.

white balance

Removes color cast to create a photo that is correctly lit. You can use your camera settings to apply the correct white balance before taking an image, or correct the white balance in ACDSee 12.


Lightest image area. You can control the intensity of the white in an image by adjusting its whitepoint.

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XML (Extensible Markup Language)

Standard language for Web documents.


In ACDSee 12, zoom refers to the process of increasing or decreasing the display scale for an image. Increase the display scale to view a portion of an image or a specific image detail. Decrease the display scale to view more or all of the image.

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