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Understanding Bitmap and Vector Graphics: A Guide to GIMP by Ross Parker

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14 diapositives · 269 Views · Sep 03, 2014

This comprehensive guide explores the basics of bitmap and vector graphics, featuring insights on file types, image resizing, and advanced features in GIMP. Learn about bitmap formats (like .png, .jpg, .gif) and vector formats (like .svg, .ai) and their appropriate uses. Discover tips for image manipulation, layering, color models, and more through hands-on steps. This resource is designed for both beginners and intermediate users to enhance their graphic creation skills. All works are licensed under Creative Commons Attribution-ShareAlike 3.0.

#understanding bitmap and vector graphics: a guide to gimp by ross parker #understanding bitmap and vector graphics: a guide to gimp by ross parker ppt #powerpoint #presentation
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  1. SC ICT CertificationLevel 1 12 Graphics By Ross Parker

  2. Graphics • Computer graphics utilise a computer’s ability to display a bitmap in order to create an image: Source: Wikimedia Commons

  3. Bitmap vs. Vector • Bitmap is the default • When should we use vector? Source: Wikimedia Commons

  4. File Types • Bitmap • .tif – uncompressed (or not), pages, layers • .bmp – uncompressed • .png – compressed, lossless • .jpg – highly compressed, lossy • .gif – highly compressed, lossy, indexed • .xcf – GIMP’s format • .psd – Abode Photoshop’s format • Vector • .svg – open standard • .ai – Adobe Illustrator’s format

  5. Basic & Intermediate USING The gimp

  6. The GIMP • The GIMP is F/OSS for creating and editing bitmap images. • www.gimp.org/downloads/ Source: Wikimedia Commons

  7. Image Size 113 px • Generally rectangular • Image size is expressed in pixels (px): • To resize: Image > Scale Image 150 px

  8. Crop 75 px • Change size of image whilst... • Maintaining size of contents • To crop: Image > Canvas Size 75 px

  9. Layers • Images can contain layers • To see Layers: Windows > Layers • Try the “Opacity” setting. 5-layer example

  10. Colors • RGB model represents colour as mix of: • Red • Green • Blue • Each colour ranges from 0 (off) to 255 (on) • HTML notation uses hexidecimal

  11. Toolbox Select Select by color Lasso Colour picker Move Rotate Paint fill Text Pen Gradient fill Foreground color Background color Tool options

  12. Advanced Focus (optional, not assessed) USING The gimp

  13. Advanced Features • Colour Curves & Balance • Filters • Select by colour • Mask • Clone Tool • Healing Tool

  14. Licensing • All original work used here is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. For more details please look at http://creativecommons.org/licenses/by-sa/3.0/. • This license has been chosen to permit a high degree of sharing, whilst protecting the author’s control as to how the content is used. • Please respect this license and use accordingly! • Recycled and borrowed works from other sources are used under appropriate licenses, which are not affected by this license. The original source is always given. • All original work created by Ross Parker (Sha Tin College, English Schools Foundation, Hong Kong), except where specified.