Computer graphics imperceptibly, but firmly entered into our everyday life. She has long ceased to be the destiny of the elect. Each time, transferring photos from a digital camera to a computer or simply pressing the “save” button to add a picture you like to the collection, you work with computer graphics.
Is it worth it to spend time on theory?
Knowing the basics of how the image manipulation method works will do you a good job. Extensions after the file name will cease to be some kind of magical abracadabra for you, and will begin to properly supply important information. You will be able to consciously decide which images are best compressed so as not to clutter up the space on your hard drive, and correctly choose which way you can do this.
Editing your own photos will also move from the state of “scientific poking method” to a whole new level. And for some, the innocent fun with the images on the screen gradually turned into a fairly profitable job.
The difference between raster and vector graphics
At the moment, in the computer environment, vector and raster graphics are mainly used. They radically differ from each other in the way of encoding information.
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Raster images perfectly convey the content of scanned objects. With their help, you can work with halftones and a smooth transition of color. Photographs taken with a digital camera also use only bitmap images. Also, this format serves as an indispensable tool in the field of web design.
Raster Graphics Formats
Recall that image information in our case is encoded using dots. The unit of measure in this encoding is a pixel. This is the smallest point that cannot be divided in either size or color.. ( ) . , , ( ).
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The main difference between the formats is the way of storing information. Consider the most common.
BMP
This is one of the pioneers. When it was developed, raster graphics were, one might say, at the very origins of its existence. The creators did not bother much and programmed BMP to sequentially store each pixel. In fact, this is just copying, but with some loss of color, since the BMP format has only 256 colors.Tiff
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GIF
This is already closer to the actual use (for non-specialists) format. He is especially famous for the ability to use animated sequences. Computer graphics made in this format also allows you to create translucent images. However, you will not be able to convey smooth transitions of colors. Most often, the use of raster graphics in GIF format can be seen in web design. It is compatible with all platforms and also compresses information quite compactly, which is an important factor in the speed of opening Internet pages.Jpeg
The most popular format. And it is well deserved. Any raster graphics editors no doubt support this format. It was designed with a specific purpose in mind - to get rid of the restrictions imposed by the compression of GIF-files. The compression algorithm in this format reaches a factor of 100 units. This is a great indicator. However, this compression still has its drawbacks - there is some data loss, and it is possible that the saved image will become somewhat blurry. Since this format simply throws back information that it considers insignificant, there is always a risk of distorting some details.JPEG 2000
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