Image Occlusion Enhanced makes you draw every rectangle by hand on one image at a time, which is the slow part everyone complains about. StudyPDF reads your PDF or slides, finds the labeled diagrams, and masks every label for you. You adjust a mask only if you want to, instead of drawing all of them from scratch.
StudyPDF vs Image Occlusion Enhanced.
Image Occlusion Enhanced is the classic Anki add-on for masking labels by hand, one image at a time. StudyPDF reads your own slides and PDFs, masks the labels on every diagram for you, exports to Anki's native Image Occlusion, and builds flashcards, quizzes, and exams from the same upload.
Choose StudyPDF ifRecommended
- You want labels masked automatically from your own slides or PDF
- You want cards that work in a stock Anki, with no add-on to install or maintain
- You want occlusion plus flashcards, quizzes, and exams from one upload
- You study on your phone and want everything in one synced deck
Choose Image Occlusion Enhanced if
- You want to place every mask by hand with pixel precision
- You prefer a free, offline tool that runs inside Anki
- You already have decks built on the Image Occlusion Enhanced note type
Feature by feature
How they compare.
Making the cardsStudyPDFImage Occlusion Enhanced
Detects and masks labels for you
StudyPDF
Bo masks every label automatically
Image Occlusion Enhanced
You draw each mask by hand
Works from your whole PDF or slides
StudyPDF
Reads the file, finds the diagrams
Image Occlusion Enhanced
One image you load at a time
Precise hand-drawn masks
StudyPDF
Auto masks, you can adjust them
Image Occlusion Enhanced
Full manual control over placement
In AnkiStudyPDFImage Occlusion Enhanced
Exports native Anki Image Occlusion
StudyPDF
Stock Anki note type, no add-on
Image Occlusion Enhanced
Its own IO-Enhanced note type via the add-on
Works without installing an add-on
StudyPDF
Nothing to install in Anki
Image Occlusion Enhanced
Needs the add-on to make and edit cards
Survives Anki updates
StudyPDF
Built-in note type since Anki 23.10
Image Occlusion Enhanced
Add-on can break when Anki updates
Beyond occlusionStudyPDFImage Occlusion Enhanced
Flashcards, quizzes, exams from the same file
StudyPDF
One upload, the whole study set
Image Occlusion Enhanced
Occlusion cards only
Answers cited to your material
StudyPDF
Every answer shows the page
Image Occlusion Enhanced
Not an answer tool
Tracks what you're weak on
StudyPDF
Per-concept mastery, what to study next
Image Occlusion Enhanced
Just makes cards
Access and costStudyPDFImage Occlusion Enhanced
Free to start
StudyPDF
Free tier covers most of a term
Image Occlusion Enhanced
Free and open source
Runs fully offline
StudyPDF
Web app, study offline in Anki after export
Image Occlusion Enhanced
Runs locally inside Anki
Imports YouTube and reads scans
StudyPDF
Video links, scans, and photos
Image Occlusion Enhanced
One image file only
Image Occlusion Enhanced is the classic Anki add-on by Glutanimate that lets you draw masks over the labels on an image by hand to make occlusion cards.
The difference
No drawing boxes by hand. Just upload and mask.
Where Image Occlusion Enhanced is strong
- Free, open source, and runs entirely inside Anki on your own machine.
- Pixel-precise manual masking, so you place every mask exactly where you want it.
- Hide-one and hide-all modes, with a mature note type and years of community decks.
- No upload needed, you work straight from an image already on your computer.
What StudyPDF doesn’t do
- Replace hand-drawing. If you want to place every mask yourself with pixel control on one image, the add-on gives that. StudyPDF auto-masks and lets you adjust.
- Run as a local, offline Anki add-on. StudyPDF is a web app that generates the deck, which you then study offline in Anki.
Why StudyPDF
Where StudyPDF pulls ahead.
The add-on stores cards in its own note type that needs the add-on to edit, and it can break when Anki updates. StudyPDF exports to Anki's built-in Image Occlusion, added in 23.10, so your cards work in a stock install with nothing to maintain and edit normally in Anki's own editor.
The add-on only makes occlusion cards. The same StudyPDF upload also gives you flashcards, quizzes, graded practice exams, study guides, and cheat sheets, all cited to your pages and tracked by concept, so the masked diagrams sit inside a study system instead of standing alone.
Free to start
Start studying.
Upload your course and ask Bo anything. No card required.
FAQ
Questions, answered.
Yes, if you want labels masked automatically from your own slides and PDFs instead of drawing every box by hand. StudyPDF exports to Anki's native Image Occlusion with no add-on, and the same upload also makes flashcards, quizzes, and exams. The add-on is the better pick if you want free, offline, pixel-precise manual masking inside Anki.
Not for new cards. Anki has had image occlusion built in since version 23.10, and StudyPDF exports to that native note type, so you can make and edit cards in a stock Anki without the add-on. You only need it to keep editing older cards already built on its own note type.
It runs locally inside Anki, fully offline and free, and gives you pixel-precise manual control to place every mask exactly where you want. It also has hide-one and hide-all modes and a mature note type behind many community decks. StudyPDF auto-masks from your files instead of being a manual in-Anki editor.
Yes. Upload a slide, scan, photo, or whole PDF and Bo finds the labeled diagrams and masks each label for you, then you can adjust any mask. It exports to Anki's native Image Occlusion note type, so there is no add-on to install.