Explore the difference between raster and vector graphics, showing how raster images use pixels and lose quality when scaled, while vector graphics stay crisp at any size.

Compare raster graphics tools like Photoshop, Corel Paint Shop Pro, and the free image manipulation program, plus Pixelmator, native formats psd, psp, xcf, and pxm, with platform and price considerations.

Understand vector graphics programs like Adobe Illustrator, Corel Draw, and Inkscape, their AI, CD-R, and SVG formats, and EPS files often requested by printers.

Explore web image formats—jpeg for photos, gif and png for transparency, and svg for scalable vectors—and learn why final outputs should be saved non-editable, re-exporting from originals when needed.

Discover how raw files act as digital negatives, offering unprocessed data and extensive controls for white balance, highlights and shadows, lens corrections, and color corrections before editing.

Compare RGB for digital screens with CMYK for print to understand two color spectrums, and note Pantone inks for consistent colors at higher cost.

Compare dpi and ppi, and learn how resolution, pixel dimensions, and output intent—print at 300 ppi vs web at 72 ppi—shape image quality.

Resize changes dimensions without altering pixel density, while resampling ties width, height, and resolution. Avoid upscaling and keep raw files for print at 300 ppi or web at 72 ppi.

Megapixels equal a million pixels, and higher counts enable larger prints, but they matter most when printing rather than for online posting.

Understand how retina graphics improve image clarity on high-resolution displays by using 2x and 3x image assets that scale down to standard sizes on the web.

Celebrate completing the understanding images course. Reflect on the diverse topics covered and keep on learning while having fun.