Image Compression and Various File Formats

This type of file format is usually employed for line craft and other graphics in which nonrepresentational figures are rather uncomplicated (Tech Target, 2001). The compression feature of the GIF formatted file It utilizes a rather simple method in compressing a file. Such method includes what is called the LZW which stands for Lempel Zev Welsch (Lynch & Horton, 2004). It extracts weaknesses in the computerized information without sacrificing such information or deforming the graphic. This method of image compression is advisable in working with graphics with sizable ranges of consistent hue.

It is not advisable to use this when dealing with image compression of complex images with many hues and elaborate textures (Lynch & Horton, 2004). Enhancing compression One may exploit the features of LZW’s scheme in image compression to enhance its performance thereby minimizing the capacity of the GIF formatted images. The idea is to decrease the amount of hues in a GIF formatted graphic to the least value required and to eliminate random hues that are unnecessary to display the figure.

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A GIF formatted image cannot exceed a total number of 256 different hues. However, it can have minimal hues, as much as having just two, particularly, white and black. Graphics with lesser hues will compress more effectively when the LZW’s scheme of image compression is utilized (Lynch & Horton, 2004). Interlacing for the GIF formatted file The traditional GIF formatted image, which is also referred to as non – interlaced image loads a single thread of pixels step by step starting from the top until it reaches the bottom (Lynch & Horton, 2004).

From here, the display program presents each thread of the graphic as it slowly figures on screen. In the case of an interlaced GIF document, the graphics information is kept in a structure that permits the display program that assist interlaced GIFs to start to compose a representation in a lower resolution version of the full – sized GIF image that appear at the time the document is transferring the data from one computer system to the other.

A large number of the population recognize that the vague to well – defined animated result of interlacing visibly attractive, however, for the most part, the essential advantage of interlacing is that it provides the audience a sample of the complete scope of the image at the same time as it is being downloaded (Lynch & Horton, 2004). Interlacing is an excellent choice for bigger GIF formatted files in the likes of graphics and pictures (Lynch & Horton, 2004).

However, it not advisable to be used for tiny GIF formatted figures in the form of icons, navigation bars and buttons (Lynch & Horton, 2004). These tiny figures will fill the monitor more rapidly as a standard GIF formatted file, in which case, reserved as non – interlaced (Lynch & Horton, 2004). Normally, the amount of space consumed by GIF formatted files is not considerably affected by interlacing (Lynch & Horton, 2004). Transparency feature of the GIF formatted file

Formatting in GIF permits one to select hues from a search table for purposes of creating transparency in the graphics. Photoshops and other software of the same kind may be utilized to do some editions to the graphics as well as to pick hues from the palette to effect transparency (Lynch & Horton, 2004). In most cases, the selected hue will become the image background. Sadly, the transparency feature of GIF formatted graphics is no way refined. As a result, all pixels of the same hue will be affected by the transparency feature whenever utilized (Lynch & Horton, 2004).

Transparent GIF formatted images with antialiasing content generates unsatisfactory outcomes (Lynch & Horton, 2004). At an instant when Photoshops and other software of the same kind has been utilized to produce a shape situated in contrast to a particular background hue, such programs will affect smoothness by means of incorporating pixels of intermediary hues at the length of the borders around the shape. Such procedure which is also referred to the antialiasing technique enhances the appearance of the graphics on screen by toning down rough ends (Lynch & Horton, 2004).

Whenever the transparency feature is utilized for a background hue and after that the same graphic is applied for a web site situated next to a another background hue, difficulty starts to build up. Nonetheless, the graphic’s pixels that have been smoothened will match up to the initial hue of the background. Even while the transparency feature of the GIF formatted graphics performs well with complicated figures, it can still be counted on for regular visual images too (Lynch & Horton, 2004). The basics of animation as a GIF formatted file

Files saved as GIF permits the grouping of multiple graphics of the same file format in a particular file for the purposes of animation. But then again, such operation of the GIF has numerous disadvantages of its own. From one frame to the other, a GIF formatted file is not compressed. Citing for example, four graphics, each measuring 30KB will amount to a total of 120 kilobytes when combined (Lynch & Horton, 2004). This 120 kilobytes graphic in itself will be set in the wire in motion. To some extent, the load of the GIF formatted files is kept smaller.

This is because prior to having been completely downloaded, frames already fill the screen and graphics is shown as it flows towards the user. One more disadvantage of an animation created as GIF formatted files is the fact that it is an annoyance as well as a possible disturbance. The absence of interface commands for animations created as GIFs allows the file to be played beyond control. At the moment looping has been allowed, GIF formatted animation will continue to play repeatedly (Lynch & Horton, 2004).

Instances wherein animations created in the GIF file format are utilized significantly are quite unusual. Moreover, such animations normally sidetrack the attention of their audience away from the most important content of the web site. Whenever a GIF formatted animation is being utilized as a content, meaning used as a tool to demonstrate a particular context or method, in such cases where animations are of significant importance, it is advisable to do so in moderation (Lynch & Horton, 2004).


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