Configure Your Challenge
The bank contains 197 questions.
Pixel and Channel Lab
Adjust channel values, alpha, and visibility. The histogram updates instantly.
Attempt History
| Date | Mode | Questions | Score | Accuracy | Grade |
|---|
How to Use This Quiz
Choose a mode, difficulty, topics, and question count. Timers, hints, shuffling, adaptive ordering, and negative marking are optional.
Submit each answer to receive feedback in practice mode. Examination mode hides explanations until the final question review.
Your unfinished attempt and recent results stay in browser storage. Reports can be copied, printed, or exported as CSV and PDF.
Key formulas
| Concept | Formula | Example |
|---|---|---|
| Pixel count | width × height | 640 × 480 = 307,200 |
| Channel levels | 2bit depth | 28 = 256 |
| Raw storage | width × height × channels × bytes | 100 × 100 × 3 × 1 |
| 0–1 normalization | value ÷ 255 | 128 ÷ 255 ≈ 0.502 |
| 8-bit inversion | 255 − value | 255 − 40 = 215 |
Frequently asked questions
They can be shuffled with independently shuffled answer choices.
Select only that topic before starting the quiz.
It reorders remaining questions toward a suitable difficulty.
Progress is stored locally in the current browser.
A used hint reduces that question’s available score.
An incorrect answer subtracts one quarter of a point.
Use CSV or PDF export after finishing an attempt.
Yes. Color swatches and histogram prompts appear throughout.
The results panel creates a focused mistakes-only attempt.