ICDL Image Editing (ICDL) study guide
ICDL Image Editing · Work through your exam, one topic at a time.
ICDL Image Editing is a certification module in the ICDL (International Computer Driving Licence) family of digital-skills credentials. It is intended for candidates who must show practical competence in producing and handling digital images: students building a portfolio, office and administrative staff, marketing and communications personnel, and anyone preparing visuals for print or screen. The syllabus is organised into five areas - imaging concepts, image capture, image creation, image editing and manipulation, and image output and saving. Candidates should expect to demonstrate understanding of resolution, colour models and file formats; to acquire images from cameras and scanners; to build and adjust compositions using selection, layer and colour tools; and to export files in a form suited to their destination. The ICDL Image Editing study guide has 5 sections and about 1,450 words.
01Imaging Concepts
Digital images come in two families. Raster (bitmap) images are grids of pixels, each storing colour values.
298 words, about 1 min02Image Capture
Capture means turning a scene, document, or screen into pixels. Digital cameras use a sensor; megapixels describe sensor output, but more megapixels do not automatically mean better pictures.
286 words, about 1 min03Image Creation
Creating an image begins with a new-document dialog: width and height (with units), resolution, colour mode, bit depth, and background contents (white, background colour, or transparent). Choose these from the destination , not habit: a web banner might be 1200 × 628 pixels, RGB, 72 ppi; an A4 print at 300 ppi is about 2480 × 3508 pixels.
287 words, about 1 min04Image Editing and Manipulation
Editing starts with selecting the area to change. Marquee tools select rectangles and ellipses; lasso and freehand tools trace irregular shapes; magic wand and quick-selection tools find similar colour or edges.
284 words, about 1 min05Image Output and Saving
Output begins with format choice. JPEG uses lossy compression, suits photographs, and cannot store transparency.
295 words, about 1 min