Images / Photos Formats
Date: July 08, 2007
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Surely sometimes you have lowered some photography of Internet because you liked, but you have been with image formats that you cannot open because you do not have the appropriate program. For that reason, sometimes you prefer not to lower anything; but he is better to know whereupon programs can be opened and if you have some, also it is important to know the formats with which they interact because many types of graphical formats exist.
Why so many extensions exist? The answer is very simple: each company that elaborates an edition program of images establishes its own format; this because the quality of the image format that the programmers use molds to its necessities. By that reason whenever it leaves a new program to the market, he is almost safe that it will have his own extension or format of image. The image formats that SoftwareTipsPalace.com will describe in this post are only some of many that exist.
Format GIF
Format GIF is known all because its characteristic of being able to include more than an image causes that it is a way relatively simple to make small videos. The two ways to use it with a single image or more than one have caused that is the favorite format of the users of Internet. Many of the animations that we see in the network are small archives GIF. This format when happening of the years has undergone several beneficial modifications all. The positive, of this format:
- Save much disc space for the quality that can offer.
- The algorithm that it has does not damage the images
- Can contain animations. The negative, of this format:
- Tine capacity of 256 colors at the most.
- Hay to have special programs if we want to see the animations outside Internet or to create the own ones.
Format TIFF
This it is the format done for professionals of the graphical design, because it can keep all the details that an image contains. The format was created by the company Marinates Systems that is one of its contributions to the design of images for the Apple platform.
The positive, of this format:
- Contain much useful information.
- Great quality of the images, with nondestructive compression.
The negative, of this format:
- Occupy much space.
- Single some programs to part of the programmed thing by Marinates Systems can recognize codified Mac/PC without problems.
Format TGA
It left almost at the same time that format TIFF, the TGA are as professional as the previous one, but this format does not allow storing so many details as the TIFF. Recording an image in format TGA data of the image are being lost. For any observer he would pass the lost one unnoticed of quality, but the professionals of the design need images with great quality.
The positive, of this format:
- Can record images of up to 32 bits.
- Recognizes almost all the types of technology of computers (PC, MAC, Graphics Silicone, etc.).
The negative, of this format: ·
- Does not keep many details, like the resolution that it supports.
- Occupy enough but space that other formats of equal quality.
Format JPEG
It was created in the middle of the 80’ to find a format that gave a compression us with lost minim of quality and they obtained it, this format is called Joined Graphics Expert Group (JGEG). This format reduces to an image almost one tenth part, but to a very high price, the lost one of quality of the image. But this is not here, but that if we make modifications to the image and we continued it keeping in he himself format arrives at a point in which no longer it serves us for anything, because it will have been degraded very many.
A number of supported colors this format allows representation true colors (16 million). Compression used is a compression with loss. The goal first of the algorithm used is to allow an important compression ratio with an aim that the modifications made on the image are not visible with the eye (what is true for the lowest compression ratios but which are not true anymore for the highest compression ratios). It is however possible more or less to compress the data. The user can vary the compression ratio of 1% (the best quality) with 99% (the worse quality).
Attention, a compression of 10% does not mean loss of 10% of information (the loss is not linear, and depends on the data of each image). Moreover, it is necessary to be vigilant because the scale of compression is not inevitably the same one according to software's (it is not standardized a whole). That means that according to the software used, the compression ratios are comparable with much difficulty. To cure this problem, each image JPEG should have for metadata the software used to create it and the compression ratio used in this software with a correspondence with a value of standardized compression.
The positive, of this format:
- Convert the complex image but a very small file
- Permit to take advantage of the disc space to the maximum.
The negative, of this format:
- Utilize a method of destructive compression that damages the quality of an image.
- Whenever we kept the image loses part of the quality of the same one.
Format BMP
Good when certain company I arrive at the world of the computers I am aware that tapeworm an own format and although does not dedicate itself specifically to the handling of images. So they invented the BMP to enter the competition. The BMP does not have much of good because it is not recognized in platforms different from the PC that contain Windows.
The positive, of this format:
- Recognizes all the PC does not matter of which it was glacier are.
- The images have much quality.
The negative, of this format:
- Cannot be compressed of any possible way or forms well-known so there is to be able to pass it to another extension.
- Does not recognize any computer that is not PC.
In this article we did describe only most familiar and most popular format, if you want to find out more about other formats try to find it on other web sites.
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