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Jemimah HowardJemimah Howard Kylie FairhurstKylie Fairhurst

What Is The Difference Between What Is The Difference Between A Vector Based Image And A A Vector Based Image And A

Bitmap Based Image?Bitmap Based Image?If we consider Bitmap graphics as being stored in a literal fashion, then If we consider Bitmap graphics as being stored in a literal fashion, then

Vector Graphics, stored representatively, are their opposites. Vector Graphics, stored representatively, are their opposites. Rather than being composed of pixels, Vector graphics consist of points, Rather than being composed of pixels, Vector graphics consist of points,

lines, and curves which, when combined, can form complex objects. lines, and curves which, when combined, can form complex objects. These objects can be filled with solid colours, gradients, and even These objects can be filled with solid colours, gradients, and even

patterns. patterns.

Figure 3

                                                                         

GIP and JPEG?GIP and JPEG?

GIF images can only contain up to 256 GIF images can only contain up to 256 colours whereas JPEG image format is colours whereas JPEG image format is used for photo-realistic photos.used for photo-realistic photos.

GIF is used for saving many pictures and GIF is used for saving many pictures and drawings and JPEG is used for drawings and JPEG is used for photographs, naturalistic artwork and similar photographs, naturalistic artwork and similar material.material.

Linked Graphic vs Embedded Linked Graphic vs Embedded GraphicGraphic

A linked graphic is stored in the source file so that A linked graphic is stored in the source file so that only a representation is shown in the document. If only a representation is shown in the document. If the source file undergoes modification, the the source file undergoes modification, the information in the document is also updated.information in the document is also updated.

• • An embedded graphic becomes a part of the An embedded graphic becomes a part of the document and no longer belongs to the source file document and no longer belongs to the source file so that it does not change when the source file is so that it does not change when the source file is altered. This is the default setting. This can be altered. This is the default setting. This can be seen when a paint file is inserted into Word, then seen when a paint file is inserted into Word, then the original paint file is changed and saved once the original paint file is changed and saved once more. The image in the document does not reflect more. The image in the document does not reflect the changes made. the changes made.

Colour PaletteColour Palette

A colour palette refers to the colours A colour palette refers to the colours included in an image. A small palette has included in an image. A small palette has few colours, whereas an image with a large few colours, whereas an image with a large palette has many more colours. palette has many more colours.

Lossless Data CompressionLossless Data Compression

Lossless data compression is a class of data Lossless data compression is a class of data compression algorithms that allows the exact original compression algorithms that allows the exact original data to be reconstructed from the compressed data. data to be reconstructed from the compressed data. This can be contrasted to lossy data compression, This can be contrasted to lossy data compression, which does not allow the exact original data to be which does not allow the exact original data to be reconstructed from the compressed data.reconstructed from the compressed data.

Lossless data compression is used in many Lossless data compression is used in many applications. For example, it is used in the popular ZIP applications. For example, it is used in the popular ZIP file format and in the Unix tool gzip. It is also often file format and in the Unix tool gzip. It is also often used as a component within lossy data compression used as a component within lossy data compression technologies.technologies.

No, JPEG use lossy, meaning that the decompressed No, JPEG use lossy, meaning that the decompressed image isn't quite the same as the one you started with. image isn't quite the same as the one you started with.

PNG FilesPNG Files

PNG or Portable Network Graphics file, PNG or Portable Network Graphics file, overcomes many of the problems with GIF and overcomes many of the problems with GIF and JPG files but it does not support animations. JPG files but it does not support animations.

GIF or Graphics Interchange Format use a GIF or Graphics Interchange Format use a different method to compress data and so do not different method to compress data and so do not suffer from blurring. However, GIF files use only suffer from blurring. However, GIF files use only 256 colours and so a high‑resolution image saved 256 colours and so a high‑resolution image saved as a GIF file may suffer from alterations in hue and as a GIF file may suffer from alterations in hue and some loss of definition. some loss of definition.

Bad About .bmp Format File?Bad About .bmp Format File?

These files don’t support compression These files don’t support compression because these are very large files. The files because these are very large files. The files are not supported by web browsers. This are not supported by web browsers. This should be avoided so that the files are not should be avoided so that the files are not huge. huge.

FlickrFlickr

Flickr is a photo sharing website and web Flickr is a photo sharing website and web services suite. Allows photos to be tagged. services suite. Allows photos to be tagged.

Recreational: Photo sharingRecreational: Photo sharing Academic: Bloggers as a photo repository. Academic: Bloggers as a photo repository.

Allows categorizations of photos. Allows categorizations of photos.

ReferencesReferences

http://www.slideshare.net/CharlCooper/powhttp://www.slideshare.net/CharlCooper/power-point-presentation-150312/er-point-presentation-150312/

en.wikipedia.org/wiki/en.wikipedia.org/wiki/LosslessLossless_data__data_compressioncompression