1. DEFINITIONS
Gif file:
The file compresses to keep the file size at a minimum and are limited to 8-bit colour palettes. It is said that GIF files should be generally used for line drawings, icons and logos. This file uses indexed colors and allows a maximum of 256 colors. GIF is one of the most popular formats on the Internet. Not only is the format excellent at compressing areas of images with large areas of the same color, but it is also the only option for putting animation online. GIF has a color depth of 8 bits per pixel or less.
JPEG file:
JPEG is very popular it has good compaction characteristics on photographic data. It lets you adjust the amount of compaction. This file's palette supports 16 million colours, unlike GIF, which only allows 256 colours on its palette. JPEG is primarily intended for photographic images. JPEG has 8 bits of color depth for each color channel and that means that a primary color can have 256 (28) different intensity values. Mixing of primary colors leads to 16.8 million different colors.
Animated GIF files:Animation is just a series of still images shown in sequence, so the most obvious way to add animation to a Web site is to post a series of bitmap images that the user's browser displays in sequence. Each frame is a full bitmap image and when you get up to something like 20 frames, your file size can be considered as way too big. Animation we see in movies includes at least 24 still images every second so animated GIFs are more restricted. Animated GIFs are often used for banner ads, in place of much larger full motion video files, and as interesting accents to homepages.
MPEG file: DVD movies, broadcasts and DSS satellite systems use MPEG compression to fit video and movie data into smaller spaces. MPEG standard provide a video resolution of 352 by 240 at 30 frames per second.
Shockwave file:Shockwave has the elements of generating, importing and editing of movies. Shockwave was originally defined with one primary objective: to create small files for displaying entertaining animations.
2. What is a vector based image and how is it different to a bitmap based image?
Vector based images are created of many individual, scalable objects. Unlike a bitmap based image, vector based images are defined by mathematical equations rather than pixels, so they always supply at the highest quality.
The file compresses to keep the file size at a minimum and are limited to 8-bit colour palettes. It is said that GIF files should be generally used for line drawings, icons and logos. This file uses indexed colors and allows a maximum of 256 colors. GIF is one of the most popular formats on the Internet. Not only is the format excellent at compressing areas of images with large areas of the same color, but it is also the only option for putting animation online. GIF has a color depth of 8 bits per pixel or less.
JPEG file:
JPEG is very popular it has good compaction characteristics on photographic data. It lets you adjust the amount of compaction. This file's palette supports 16 million colours, unlike GIF, which only allows 256 colours on its palette. JPEG is primarily intended for photographic images. JPEG has 8 bits of color depth for each color channel and that means that a primary color can have 256 (28) different intensity values. Mixing of primary colors leads to 16.8 million different colors.
Animated GIF files:Animation is just a series of still images shown in sequence, so the most obvious way to add animation to a Web site is to post a series of bitmap images that the user's browser displays in sequence. Each frame is a full bitmap image and when you get up to something like 20 frames, your file size can be considered as way too big. Animation we see in movies includes at least 24 still images every second so animated GIFs are more restricted. Animated GIFs are often used for banner ads, in place of much larger full motion video files, and as interesting accents to homepages.
MPEG file: DVD movies, broadcasts and DSS satellite systems use MPEG compression to fit video and movie data into smaller spaces. MPEG standard provide a video resolution of 352 by 240 at 30 frames per second.
Shockwave file:Shockwave has the elements of generating, importing and editing of movies. Shockwave was originally defined with one primary objective: to create small files for displaying entertaining animations.
2. What is a vector based image and how is it different to a bitmap based image?
Vector based images are created of many individual, scalable objects. Unlike a bitmap based image, vector based images are defined by mathematical equations rather than pixels, so they always supply at the highest quality.
No comments:
Post a Comment