1
Choose an image
Add a diagram, map, chart, process, artwork, or other visual material to a card.
Image occlusion flashcards
Turn any diagram into a memory workout.
Hide labels or regions on an image, then practice retrieving what belongs underneath. AlgoApp includes image occlusion directly in the card editor.
Built into the editor
From labeled image to active recall in three steps.
2
Draw masks
Place rectangular or circular masks over the labels and regions you want to remember.
3
Review with spacing
Save the card and practice it in AlgoApp's ordinary FSRS spaced repetition flow.
Where it shines
Visual material becomes testable.
✚
Anatomy & medicine
Mask structures, labels, pathways, and regions on anatomy illustrations or clinical images.
⌁
Science & engineering
Practice parts of a system, process diagrams, formulas, charts, and labeled equipment.
⌖
Maps & visual subjects
Learn geography, art, architecture, interfaces, and any subject where position carries meaning.
Why occlusion
Seeing is not the same as recalling.
A labeled diagram can feel familiar even when the labels are doing the work for you. Image occlusion removes that support. You see the visual context, but must retrieve the hidden name, step, or relationship yourself.
Keep the image intact
Instead of cutting a diagram into disconnected pieces, masks preserve the surrounding visual structure. That makes image occlusion useful when location, shape, and neighboring parts help form the memory.
Make the card part of your deck
Occlusion cards are not a separate study system. Organize them with ordinary decks, folders, and tags; combine them with text, image, and audio cards; and schedule them with FSRS.
Make the diagram ask the question.
Add an image, cover what you want to retrieve, and let spaced repetition handle the rest.