Introduction
In this blog i will be explaining over all what the file format is and then i will also explain the features advantages disadvantages of the following four file formats they are listed below:
Bitmap
Vector
JPEG
.PNG
I also will be explain in detail what type of image they would excel in for example a photograph or a animation or wallpaper.
The first file format i will be looking at is Bitmap. First of all a bitmap is a raster graphic which formally means it has a built up data structure of rectangular grids and pixels or points of colour these can be displayed in a number of ways on a monitor paper on any display medium really. Bitmap images have a few features it can be compressed to make the over all size and file size smaller when compared to other file sizes of the same image such as JPEG and Vector the screen shot below shows this and easier to send.
Below is the screen shot of flower DSC_0027 after file compression
Bitmap images excel in one category and that is terrain or nature images and it can be displayed in graphical detail as shown by the images on the right and left.Bitmaps have a few advantages but they also have their limitations as well some advantages of using bit map images is that it can display a picture realistically. Bitmap images are made up out of pixels, which is basically a colored dot. Properly positioning the different colored dots next to each other will perform the illusion of one color blending into another. Thus, it is easier to get a more real-looking image using this format. Disadvantages of using bitmap images are that when a file or image is saved in the bitmap file format it is made bigger in size as there are some many pixels to account for. But the main limitation of using a Bitmap file sized images is that wen zoomed in or zoomed out it will decrease in quality, when zoomed in it will pixilate more shown my the image below and when zoomed out it loses colour contrast and sharpness as displayed below.
The second file format i will be looking at is vector. First of all a Vector image colour information is stored in a series of mathematical calculations; they use similar relationships between points and pants on the image connecting them to describe an image vector graphics are composed of paths.
Vector images excel in a certain type of image and that image is cartoon and animation as they can be zoomed in and changed and stay in top quality even tho they are colour paths running over each other. The images on the right and left are vector images see how they both animated or very cartoon like.Just like any other formats vector images have advantages as well as limitations i will start listing the advantages below.
The advantages of using vector images is that vector images can be reshaped and re sized without any loss in quality. this makes them especially good for logos Another advantage of vector images is that the file size is based on complexity and not the size or color depth. A final advantage of vector images is that they are easily generate/ created by programs and they don't take long to render compared to bitmap. Final advantage of vector is that wen a file is compressed in its format it reduces the sized of the over all file dramatically. The limitations of using vector images are that some images are hard to reproduce because if its complex shape. Another limitation of vector images is that they can often take a long time to create. The final limitation of vector graphics is that there are some editing effects that cannot be applied to vector graphics such as blurring and glints.
The third file format i will be looking at is Jpeg. First of all a jpeg is the most often used image file format is is the preset rendering format for many image editing software for example Paint, Photoshop and Sumopaint and this reason is because Jpeg can be opened in nearly every image viewer and work document. Jpeg is designed for compressing either full colour which is 24 bit or gray scale digital images of real world scenes. below are two JPEG images.
Jpeg images excel in most types of images but mainly in real life images such as the ones taken here it is the format most cameras capture in as it captures every bit of quality in the images they take. when they are compressed they they can become pixalised like a bit map image and they reduce in contrast and in colour depth when made smaller.
Just like any other formats jpeg images have advantages as well as limitations i will start listing the advantages below.
The advantages of using Jpeg images are that it works well on photographs and naturalised artwork mainly because files can come put very large with such a small size and cad display standard quality images another advantage of using JPG is because it handles still images well and there is a similar format for animations the final advantages is that when a file is compressed to JPEG it makes the over all size of the file very small which makes it easier to send in an e-mail. The Limitations of using Jpeg images is that they do not work well on lettering, Simple cartoons and and black and white line drawings. The main limitation is that if you want to have an animated image you can use JPG you have to use a similar format called MPEG which is a format that is near enough the same but is used to support animations instead of still images.
The Fourth file format i will be looking at is .PNG First of all a .PNG is a portable network graphic it is a bitmapped image format that uses lossless data compression which means that it only allows an approximation of the original data to be carried over in exchange for a smaller file compression size. .PNG was created to improve and replace GIF as an image file format not requiring a patent licence image format. GIF stands for Graphics Interchange Formats. Below are some examples of .PNG images.
.PNG Images work great in animated and real life images but they excel in animated images they can be rendered as a still image and this greatly improves the image quality but it also increases the size of it drastically and this is one of .PNG limitations
Just like any other format .PNG images have advantages as well as limitations i will start listing the advantages below.
The advantages of .PNG are that it supports palette based images with palettes of 24 bit RGB or 32 bit RGBA colours Gray scale images with or without alpha channel. the big advantage of using .PNG is that images can be converted to it so that it is smaller and easier to send over the Internet. The limitations it has a large file and if stretched it loses quality The main Limitation for .PNG is that it doesn't come out in quality and therefore does not support non RGB colours spaces such as CMYK.
Now i will be talking about data compression and what it is i also will be explaining the two main types of data compression and give the advantages and disadvantages of data compression as well.
Data compression is the reduction in size of data in order to save space and or transmission time time which means the amount of time it takes to send the file in an e-mail i have compressed an image in a number of different compression formats and i will show you the results via screen shot below.
The advantages of using vector images is that vector images can be reshaped and re sized without any loss in quality. this makes them especially good for logos Another advantage of vector images is that the file size is based on complexity and not the size or color depth. A final advantage of vector images is that they are easily generate/ created by programs and they don't take long to render compared to bitmap. Final advantage of vector is that wen a file is compressed in its format it reduces the sized of the over all file dramatically. The limitations of using vector images are that some images are hard to reproduce because if its complex shape. Another limitation of vector images is that they can often take a long time to create. The final limitation of vector graphics is that there are some editing effects that cannot be applied to vector graphics such as blurring and glints.
The third file format i will be looking at is Jpeg. First of all a jpeg is the most often used image file format is is the preset rendering format for many image editing software for example Paint, Photoshop and Sumopaint and this reason is because Jpeg can be opened in nearly every image viewer and work document. Jpeg is designed for compressing either full colour which is 24 bit or gray scale digital images of real world scenes. below are two JPEG images.
Just like any other formats jpeg images have advantages as well as limitations i will start listing the advantages below.
The advantages of using Jpeg images are that it works well on photographs and naturalised artwork mainly because files can come put very large with such a small size and cad display standard quality images another advantage of using JPG is because it handles still images well and there is a similar format for animations the final advantages is that when a file is compressed to JPEG it makes the over all size of the file very small which makes it easier to send in an e-mail. The Limitations of using Jpeg images is that they do not work well on lettering, Simple cartoons and and black and white line drawings. The main limitation is that if you want to have an animated image you can use JPG you have to use a similar format called MPEG which is a format that is near enough the same but is used to support animations instead of still images.
The Fourth file format i will be looking at is .PNG First of all a .PNG is a portable network graphic it is a bitmapped image format that uses lossless data compression which means that it only allows an approximation of the original data to be carried over in exchange for a smaller file compression size. .PNG was created to improve and replace GIF as an image file format not requiring a patent licence image format. GIF stands for Graphics Interchange Formats. Below are some examples of .PNG images.
.PNG Images work great in animated and real life images but they excel in animated images they can be rendered as a still image and this greatly improves the image quality but it also increases the size of it drastically and this is one of .PNG limitations
Just like any other format .PNG images have advantages as well as limitations i will start listing the advantages below.
The advantages of .PNG are that it supports palette based images with palettes of 24 bit RGB or 32 bit RGBA colours Gray scale images with or without alpha channel. the big advantage of using .PNG is that images can be converted to it so that it is smaller and easier to send over the Internet. The limitations it has a large file and if stretched it loses quality The main Limitation for .PNG is that it doesn't come out in quality and therefore does not support non RGB colours spaces such as CMYK.
Now i will be talking about data compression and what it is i also will be explaining the two main types of data compression and give the advantages and disadvantages of data compression as well.
Data compression is the reduction in size of data in order to save space and or transmission time time which means the amount of time it takes to send the file in an e-mail i have compressed an image in a number of different compression formats and i will show you the results via screen shot below.
here is the first print screen i took these are the images be for i compressed them i picked the image DSC_0016 to compress the outcome results are below.
as you can See that after the files have been compressed in a number of formats the file sizes vary from 577KB to 29,431Bb that's nearly 28MB in size different.
There are two main types of file compression styles these are loss less compression which is displayed on the left image below and there is lossy which is displayed by the image on the right.
lossy file compression is a data encoding method which discards / loses some of the data, in order to achieve its purpose which is to become either bigger or smaller in file size. Hence the name lossy. With the result that decompressing has on the image the remaining data yields content that is different from the original, though similar enough to be useful in some way as it can be added to other parts of the image to improve the quality of the over all image. Lossy compression is most commonly used to compress multimedia data such as Audio and Video and still images. It mainly is used in applications such as streaming media and Internet telephony. an example of a lossy file format would be a JPEG.
The final Compression style is lossless file compression. Lossless file compression is a class of data compression algorithms that allows the exact original image quality to be the same after it has been compressed. The term lossless is in contrast to lossy data compression which only allows a certain amount of the original data to be reconstructed in exchange for better compression rates. Lossless data compression is used in many applications it is mainly used in zip applications likeWinzip and 7zip as well as Gzip.
Now i will be talking about the Advantages and Disadvantages of File compression.
The advantages of using file compressions are that it gives you better disk space. it also has a faster writing and reading speed as well as a faster transfer rate. Another advantage of file compression is that it is faster for uploading to the Internet and mainly good for sending via email.
The Disadvantages of file compressions is that it adds complications if it doesn't compress to a certain size that you were looking for. Another disadvantage of file compression is that it is slower for big files with a lot of detail and quality another disadvantage of data compression is that the overall quality of the image is reduced.
Colour depth is an 8 bit colour graphic which uses a method of storing image information in a computers memory or in an image file so each pixel is represented by one 8 bit byte. The maximum number of colours that can be displayed at any one time is 256. The 8 bit id made up of the 3 primary colours which are red, green and blue typically with 3 bits for red 3 bits for green and 2 bits for blue. Bit depth is the number of bits to represent pixel colour.
Now i will be explaining image resolution.
Image resolution describes the detail an image holds the term applies to digital images, film images and other types of images. The higher the resolution the higher the detail. Image resolution can be measured in various ways. Resolution units can be tied to physical sizes in lines per mm, or in either lines per inch to the over all size of the picture
