ITC s.r.o.Přemysl Morgan VacekVECTORS VS RASTERS AND GRAPHIC FORMATS(REVIEW OF IT BASICS)
VECTORS VS RASTERS Vector graphic consists of individual objects, which are rectangle, ellipse, line, curve, outline, fill, and text the result is a file that compared with raster graphics is much smaller (in terms of data volume). possibility of unlimited modifications (including resizing) without loss of quality not suitable for describing complex patterns - such as photos.
VECTORS VS RASTERS Raster (or bitmap) graphics made up of small dots called pixels, each pixel stores information about color can be found mainly in photos can display grid using complex models (photo) conversion between raster formats is easy disadvantage is the large amount of data and information loss in various adjustments (zoom, rotate, etc.)
VECTORS VS RASTERSExample showing effect ofvector graphics versusraster graphics. The originalvector-based illustration isat the left.Vectors use special fileformats:.svg, .ai, .cdr, .dwgAnd special application isoften needed to open suchfile.
RASTER GRAPHIC FORMATS provide rules under which the image is saved in the file. To save the disk space, an automatic data compression is applied on each image file (its size is in MB). Therefore, we divide graphic formats depending on the type of compression (see next slide)
RASTER GRAPHIC FORMATS Lossless compression - the files retain information identical to the original. This prevents the loss of image quality. These are the most comon file types: .tif, .tiff, .bmp, .psd Compression with loss – it discards some information and image quality is affected. The advantage is a significant reduction in file size. These are mainly the following file types: .jpg, .jpeg, .gif, .png
RASTER GRAPHIC FORMATS Currently, the most common compressed graphic format is JPG / JPEG - used primarily for routine work, the Internet, and presentations. The most commonly used format in a lossless compression is TIF / TIFF - is used primarily for storing high quality photos in high resolution
RASTER GRAPHICS FORMAT Comparison of tiff and jpeg photos:
USING PRINT SCREEN KEY PrintScreen (or PrtScr) is a function key used to capture the actual content of the screen (e.g. content of error messages, documentation, procedures, etc.) into windows clipboard. Use the Print Screen key create the screenshot to the Windows clipboard, and then you are able to paste (CTRL + V) it into any program - for example, IrfanView, MS Word.