A noticeable degradation to image quality as a result of file compression Choosing a high quality compression often results in very little loss of perceptible information The lower the quality of compression, the poorer the image quality will be when the image is decompressed
Image compression that sacrifices some image resolution for greater compression ratios
A compression in which information is lost Saving a file repeatedly with lossy compression will additionally degrade the image quality This degradation is known as "generation loss" For example, Cinepak is a lossy codec
Losing information For example, a narrowing coercion may be lossy because the thing being coerced may be too big to fit into the new type
Term used to describe data compression that discards, i e loses, data in a graphic file to conserve file size
Data compression algorithms that assume some of the data in a image file is unnecessary and can be eliminated without affecting the perceived image quality Typically this type of compression has ratios between 10: 1 and 100: 1
A video/image compression method that doesn't preserve 100% of the information in the original data
A term describing a data compression algorithm which actually reduces the amount of information in the data, rather than just the number of bits used to represent that information The lost information is usually removed because it is subjectively less important to the quality of the data or because it can be recovered reasonably by interpolation from the remaining data
lossy compression a way of making a computer file smaller, but which involves losing some of the information in it
Refers to a data compression algorithm that actually reduces the amount of information in the data, rather than just the number of bits used to represent that information The lost information is usually removed because it is subjectively less important to the quality of the data (usually an image or sound) or because it can be recovered reasonably by interpolation from the remaining data
A term used to describe a file compression scheme that may discard information (and thus detail in an image) as it reduces the size of the file The JPEG (Joint Photographic Experts Group) file format is the most common lossy file format Used wisely, its effect is not noticeable
is used in the context of describing audio encoding schemes where some detail or nuance of the original analog master or source material/signal are lost during the analog-to-digital and digital-to-analog conversion process Lossy audio encoding algorithms are used when the data for lossless encoding schemes would far exceed the capacity of the recording/transmission medium Examples of lossy audio encoding schemes are the Dolby Digital or DTS To minimize loss of audio performance, lossy audio encoding schemes uses perceptual encoding, where psycho-acoustics is used to encode the information that most humans are most likely to hear
If a process is lossy, it means that a little quality is lost when it is performed If a format is lossy, it means that putting data into that format (or possibly even manipulating it in that format) will cause some slight loss Lossy processes and formats are typically used for performance or resource utilization reasons The opposite of lossy is lossless
A method of image compression where some image quality is sacrificed in exchange for higher compression ratios The amount of quality degradation depends on the compression algorithm used and a user selected quality variable
A slightly degenerative compression method, in which relatively unimportant data is selectively discarded, after which the rest of the image is compressed
Describes an image compression method that reduces image detail in order to create a smaller file size
An image format that sacrifices a certain amount of image information in order to create a smaller compressed file
A term coined by graphics programmers to refer to a technique of shrinking file sizes by giving away some precision of detail JPEG is the most common of these By reducing the so-called quality of a picture when you save it, you can make the file size smaller Many pictures can take a lot of loss of fine detail before it becomes noticeable on a web page See the explanation in Creating Small, Fast-Loading Graphics for Web Pages
A compression protocol which sacrifices ("loses") some detail in order to maximise compression "Lossy" compression formats are useful in applications like displaying graphics on the Web, where a little loss of detail won't make too much difference In applications which require exact reproduction of the file being compressed, a "lossless" protocol should be used JPEG is a "lossy" file compression format
A compression algorithm that reduces file size by actually removing data from the image The post-compressed image is different from the pre-compressed image, even though they may look identical (visually lossless)
compression of graphical data in which some of the information is lost and the quality of the picture is damaged although the compression is very efficient