Compression
A digital process that reduces the number of bits in an image to reduce the file size The benefit is that it takes less storage space and can be e-mailed quicker There are two types of compression - Lossy which permanently loses ...
Technically compression is a function of distance and enlargement. The bigger the distance and the higher the enlargement (=longer focal length) the more pronounced is the effect.
The JPEG topic in this glossary shows an example as to how image quality is affected by JPEG compression.
This article is written by Vincent Bockaert,
author of The 123 of digital imaging Interactive Learning Suite
Click here to visit 123di.com ...
Compression
Techniques Glossary Compression
A digital process that reduces the number of bits in an image to reduce the file size. The benefit is that it takes less storage space and can be e-mailed quicker.
Compression
Compression refers to the process of reducing an image's file size so that it doesn't absorb a large amount of computer memory. All digital cameras use some form of compression due to their limited storage capacity.
JPEG Compression vs. File Size
and Image Quality
This photo CD image was opened with Adobe Photoshop using their Kodak Photo CD conversion program. It was then sized and saved to JPG using Adobe's "best" level of image quality for compression.
JPG Compression works under the assumption that if two areas are almost exactly the same color, the average viewer is going to see them as the same color.
Lossy and Lossless Compression
Lots More Information
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Megabytes, Megapixels, JPEG Compression, and File Size Confusion
Isn't 100K a really small size for a photo for Your Best Shot? We explain JPEG compression, from camera to computer monitor.
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COMPRESSION RATIO- Compression is a function of the camera's internal programming to take a picture and store in less space than it would normally fill.
Compression
Compression is a fancy computer term for packing as much data as possible into a small space.
Compression Choices: One of the options available with some digicams is a range of compression choices.
Compression - the process by which large image files are squeezed into smaller files to make them easier to store and quicker to transfer. There are two types of compression: lossless and lossy.
Compression
Compression is a very common feature of digital photography and of digital media in general. What photo compression does is attempt to lower the overall file size by reducing the resolution of a photographic image.
Compression
Compression is the process of compacting digital images using software algorithms to subtract data. Smaller image files are easier to store and manage.
Compression - Process of coding digital data using fewer bits, in order to save storage space or transmission time. There are many Compression algorithms and utilities.
Compression, lossy. A file compression scheme that reduces the size of a file but degrades it in the process so it can’t be restored to its original quality.
Compression. The process of reducing the size of a file.
Compression
The reduction of data to reduce file size for storage. Compression can be "lossy" (such as JPEG) or "lossless" (such as TIFF LZW). Greater reduction is possible with lossy compression than with lossless schemes.
Compression: Squashing data to reduce file sizes, so using less space for storage, or to enable quicker transfer of files. JPEG, GIF, PNG, are some formats used.
Contrast: The range of tones in an image ranging from highlight to shadow.
Compression - Storing image data in a way that results in a reduction in file size. Compressing data is especially important when you want to publish images to the web or e-mail. GIFs, JPEGs, and PNGs are all common compressed file formats.
Compression: Reducing digicam picture file sizes in the camera after they're shot, usually according to Joint Photographic Experts Group (JPEG) specifications so more images can be stored on the memory card.
Compression
Many file formats use compression to reduce the file size of bitmap images. Lossless techniques compress the file without removing image detail or color information; lossy techniques remove detail.
Composite video ...
Compression: Another factor that affects image quality is compression, the process that shrinks a photo's file size. Most cameras take photos as compressed JPEG files, which allows you to store more images on a memory card.
Compression:
Process of compacting digital data, images and text. Software algorithms search the raster image to build a greatly condensed (from a file storage perspective) format of the image. (See File Formats)
DPI: ...
Compression
Compression is the process of removing redundant digital image information from a file to reduce the file's overall data size.
Continuous Autofocus ...
compression
A large number of pixels results in a high resolution image, but requires more computer space to store.
Compression
The process of reducing the size of a file. Compression is either lossless or lossy.
Continuous Autofocus ...
Compression - The process of reducing the storage needed for computer data - including digital photos - by encoding that data into a different form.
Compression - Squeezing a file (especially an image) into a more efficient form to reduce the amount of storage space required.
Compression
Lenses don’t capture the world as we see it with our eyes. I have demonstrated the type of distortion inherent with wide angle lenses in the previous section, and now I want to explain how telephoto lenses distort reality.
Compression Ratio
The amount of data in a digital image divided by the amount of data in a version after compression. Higher ratios indicate more compression which may degrade image quality.
(see JPEG and Lossy) ...
Compression
A process that reduces the amount of data representing an image so that the file takes up less space in your camera, memory card, or computer. Smaller files are quicker to use for e-mail and on the Web.
Compression - A digital photograph creates an image file that is huge, a low-resolution 640x480 image has 307,200 pixels. If each pixel uses 24 bits (3 bytes) for true colour, a single image takes up about a megabyte of storage space.
compression artifact
Spurious addition to or degradation of an image due to the process used to compress or decompress it.
compression type ...
Compression Refers to a process where digital files are made smaller to save on storage space or transmission time.
Compression. A Digital photograph creates an image file that is enormous. To enable image files to become smaller and more manageable cameras employ some form of compression such as JPEG.
compression
Reduction in size of data. Compression of images, audio and video is provided by a wealth of different compression algorithms, which can be classified as either lossy or lossless.
content management system ...
Compression
The process of re-encoding digital information using fewer bits than the original file or source. This reduces transmission time and storage requirements.
Compression
Data may be compressed to reduce storage (memory) space or transmission times (= reducing the amount of data). Well-known compression standards include JPEG and MPEG.
Compression: A software or hardware process that "shrinks" images so they occupy less storage space, and can be transmitted faster and easier.
compression
the process of removing irrelevant information and reducing unneeded space from a file in order to make the file smaller. Compression can cause losses and distortion, depending on the method.
Compression
A method of reducing the size of a digital image file in order to free up the storage capacity of memory cards and hard-drives .
Compression
The process of reducing the size of a digital file, usually through software. This speeds processing, transmission time and reduces storage requirements.
Compur shutter
A well known German brand of compound shutter.
DECOMPRESSION
Lets face it, a lot of Photographers care more about their f-stops than decompression stops.
Gamma Compression
Another example is Gamma compression. I'm not Timo Autiokari, but his fundamental point that "Gamma 1 (linear) is better" is correct and supported by Giorgianni and Madden themselves: ...
Lossy Compression A reduction of image file size by disposing of unneeded data, resulting in a slight degradation of image quality. Low Key Refers to an image distinguished by overall dark tones.
WP HTTP Compression
This plugin will allow your WordPress blog to output pages compressed in gzip format, if a browser supports compression.
Wavelet Compression - In this type of compression the whole entire image is compressed instead of dealing with it by small pieces of 8 x 8 pixels.
Compression Ratio
The compression ratio expresses the difference between the file size of an uncompressed image, and the file size of the same image when compressed.
Compression
The process of encoding files through an algorithm, which decreases the size for storage or transmission over the Internet. There are two types of compression: lossy and lossless.
Compression
Any digital photo creates a very large file of data. The bigger the files, the fewer photos will fit in your camera's buffer and memory card.
Compression and Decompression. Compresses information so that it can be sent across a network faster, and decompresses information received via the network.
Cold colors:
Colors at the blue end of the spectrum that suggest a cool atmosphere.
Compression also allows more pictures to be stored on your camera's memory card. Most digital camera have a "Picture Quality" control, which is the same as compression. If you select a lower quality level, your camera card will hold more pictures.
Compression
Digital images can take up lots of storage, so most are compressed in some way. Compression is usually a trade-off however between file size and quality.
Continuous Tone ...
Compression, in relation to photographic files, refers to the process of throwing out or compressing data in order to make the file size smaller. Raw files are either not compressed or use a lossless compression (no data is lost).
Compression: The compression of digital files in a format that requires less storage space. Compression techniques are distinguished from each other by whether they remove detail and color from the image.
File Compression
Image files are huge compared to many other types of computer files. For example, a low-resolution 640 x 480 image has 307,200 pixels.
This compression is nearly always of the JPEG type, i.e. lossy (see section 3.2 for an explanation of compression). The exact algorithm used internally will vary from camera to camera.
JPEG compression artifacts blend well into photographs with detailed non-uniform textures, allowing higher compression ratios.
Full quality (Q = 100), filesize 83261 B.
High quality (Q = 50), filesize 15138 B.
JPEG is a compression technique supported by the format of JPEG, PDF, and PostScript language file. JPEG compression provides the best results with continuous-tone images when the size of the file is the main factor, such as photographs.
 See also: Camera, Digital, Image, Photograph, Light
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