Vectors vs Rasters, Graphic Formats

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Vectors vs Rasters, Graphic Formats

  1. 1. ITC s.r.o.Přemysl Morgan VacekVECTORS VS RASTERS AND GRAPHIC FORMATS(REVIEW OF IT BASICS)
  2. 2. 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.
  3. 3. 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.)
  4. 4. 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.
  5. 5. 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)
  6. 6. 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
  7. 7. 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
  8. 8. RASTER GRAPHICS FORMAT Comparison of tiff and jpeg photos:
  9. 9. 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.

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