Real-World Example: Photo Sharing
Part of Compression — GCSE Computer Science
This deep dive covers Real-World Example: Photo Sharing within Compression for GCSE Computer Science. Revise Compression in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 16 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 9 of 11 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 11
Practice
15 questions
Recall
16 flashcards
Real-World Example: Photo Sharing
Scenario: You take a 12MP photo with your phone camera.
- Uncompressed RAW: 36 MB (12 million pixels × 3 bytes)
- PNG (lossless): ~18 MB (50% compression - some redundancy removed)
- JPEG high quality: ~3 MB (92% compression - barely noticeable loss)
- JPEG medium quality: ~800 KB (98% compression - slight artifacts)
- JPEG low quality: ~200 KB (99.4% compression - visible blocks)
For Instagram/Facebook: JPEG medium (800 KB) is perfect - 45× smaller, looks great on phones!
For photo printing: JPEG high (3 MB) or PNG (18 MB) - need quality for large prints