01.Compare and Contrast Vector Vs Raster? Raster Artwork Vector Artwork Definition: Any artwork that is composed digitally Definition: Two dimensional artwork that is of horizontal and vertical rows of pixels to made up of mathematical lines and curves. make up an image. Raster files are resolution Vector dependent and cannot be enlarged without files are resolution independent and can be losing image quality. enlarged infinitely without losing image quality. Typical File Types: .psd .tif .jpg .gif .bmp Typical File Types: .ai .eps .ps .indd .pdf .cdr Important Note: The file types above are always Important Note: The vector file types shown raster images and are never usable for our table above can contain raster art. If you are unsure throw or chair products. about your files have one of our production specialists verify your artwork. Raster Artwork viewed at 100%: Vector Artwork viewed at 100%: Raster Artwork viewed at 500%: Vector Artwork viewed at 500%: Compare Vector vs Raster Compare Types of Images Categorizes Vector Images Raster/Bitmap Images Vector graphics are resolution Raster graphics are resolution independent. dependent. They can be scaled up or down without any loss of quality. They cannot be enlarged without Resolution losing image quality. Vector images are defined by math, not pixels. The resolution of a raster image or scanned image is expressed in terms of the dots per inch or dpi. Vector images are composed of Raster images are composed of objects not pixels. pixel, so color of each Dots or Pixels. Easier to change the color of individual objects without complexity of colors and try to Color worrying about individual pixels. change colors, and you can see the biggest disadvantage of editing and Coloring vector images is much manipulating raster images easier than coloring bitmaps. Vector files are very small in file Huge file sizes for raster graphics. size. (Because Vector images do (Because color of each pixel in the File Size not need to keep track of each collection of pixels.) individual pixel in an image, only mathematical descriptions.) Common Vector image formats : Common raster image formats : EPS (Encapsulated PostScript) BMP (Windows Bitmap) WMF (Windows Metafile) PCX (Paintbrush) AI (Adobe Illustrator) TIFF (Tag Interleave Format) File CDR (CorelDraw) JPEG (Joint Photographics Expert Formats DXF (AutoCAD) Group) GIF (Graphics Interchange SVG (Scalable Vector Graphics) Format) PLT (Hewlett Packard Graphics PNG (Portable Network Graphic) Language Plot File) PSD (Adobe PhotoShop) CPT (Corel PhotoPAINT) Popular Vector Editing Programs Popular Bitmap Editing Programs : : Adobe Photoshop Adobe Illustrator GIMP CorelDRAW Microsoft Paint Editing Freehand Corel PhotoPAINT Program Inkscape Serif DrawPlus Xara Xtreme Collect Different Kind Of Font Used In Newspaper And Categorize Them As Serif And San-Serif Family. Introduction to compression techniques Compression ? :-Compression is the reduction in size of data in order to save space or transmission time. For data transmission, compression can be performed on just the data content or on the entire transmission unit (including header data) depending on a number of factors. :- Content compression can be as simple as removing all extra space characters, inserting a single repeat character to indicate a string of repeated characters, and substituting smaller bit strings for frequently occurring characters. :-This kind of compression can reduce a text file to 50% of its original size. Compression is performed by a program that uses a formula or algorithm to determine how to compress or decompress data. The basics of compression Lossless and lossy compression Latency Lossless compression :- A compression technique that decompresses data back to its original form without any loss. The decompressed file and the original are identical. :- All compression methods used to compress text, databases and other business data are lossless. For example, the ZIP archiving technology (PKZIP, WinZip, etc.) is a widely used lossless method. lossy compression :- Reduce non-sensitive information to human eyes (not mathematical, but physiological method) :- Cannot reproduce original image :- Can specify the amount of information loss high compression 03 Prepare The Table For File Types Including Relevant Details As Short Name Of Extension, Compression Types And Proprietorship. Raster Image Formats : File Extension File Description Compression (File Name) Type .BMP (Bitmap Image File ) Many older graphical user interfaces used bitmaps in Lossless their built-in graphics subsystems. Especially compression on Microsoft Windows and OS/2 operating systems. BMP files may contain different levels of color depths per pixel. They may also be stored using a grayscale color scheme. While most BMP files have a relatively large file size due to lack of any compression. .TIFF (Tagged Image File TIFF files were designed to be a standard image format Lossy and Format) for saving high-quality color images on multiple lossless computer platforms. compression The TIFF format was originally developed by Aldus, who merged with Adobe Systems in 1994. also supports multiple layers and pages. file sizes are quite big. .GIF (Graphical Interchange Image file that may contain up to 256 indexed colors. lossless Format File) compression GIFs are common format for Web graphics, especially small images and images that contain text, such as navigation buttons. They may also include transparent pixels, which allow them to blend with different color backgrounds. .JPEG (Joint Photographic JPEG a good format for storing digital photos. lossy Experts Group) Compression It stores information as 24 bit color. JPEG images are commonly used for Web graphics and for storing photos taken with digital cameras. Noticeably reduce the image quality if high amounts of compression are used. .PNG (Portable Network Similar to a .GIF file but without copyright limitations; lossless Graphic) commonly used to store graphics for Web images. compression PNG images do not provide CMYK color support because they are not intended for use with professional graphics. PNG images are now supported by most Web browsers. PNG images may include an 8-bit transparency channel. Vector Image Formats: File Extension File Description Compression (File Name) Type .EPS(Encapsulated PostScript (.PS) file that may contain 2D vector PostScript File) graphics, bitmap images, and text. Can be placed within another PostScript document. EPS files are supported by several different drawing programs and vector graphic editing applications. .AI (Adobe Illustrator File) Drawing created with Adobe Illustrator, a vector Most vector graphics editing program. images not need commonly used for logos and print media. compression Since Illustrator image files are saved in a vector format, they can be enlarged without losing any image quality. .CGM (Computer Graphics Originally used for clip art libraries. Metafile) (Based on the ISO/IEC 8632 standard) are now commonly used for CAD drawings. CGM files are encoded using one of three different methods: o Binary encoding o Character-based encoding o Clear-text encoding .SVG (Scalable Vector Describes images using a text format that is based on Graphics File) XML. This format created by the World Wide Web Consortium (W3C). SVG images can be created and exported from Adobe Creative Suite programs, such as Illustrator and GoLive. .WMF (Windows Metafile) Proprietary Windows graphic format developed by Microsoft. Including commands for drawing lines, circles, and rectangles; may also contain bitmap drawing operations. Most vector images not Used primarily for vector images, but can also include need raster graphics. compression .EMF (Enhanced Windows Windows vector graphics format recognized by many Metafile) image-editing applications. Basically a 32-bit version of the original Windows Metafile Format (.WMF), which only supports 16-bit data. Saves image data in an RGB format and does not support CMYK data. EMF can also used as a graphics language for printer drivers.
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