175 7
Sign in to rate

Image Occlusion Enhanced

1.05MB. Updated 2017-04-17. Only supports Anki 2.0.x.


Image Occlusion Enhanced is an updated version of Image Occlusion 2.0. Image Occlusion lets you create cards that hide parts of an image to test your knowledge of that hidden information. The cards generated by this add-on would be best described as image-based cloze-deletions: COMPATIBILITY This add-on only works with Anki's stable release branch (2.0.x ≥ 2.0.30). The 2.1 beta branch is not supported at this point in time. I am actively working on porting the add-on to Anki 2.1, but as you might imagine, with a codebase as complex and old as that of I/O it takes some time. PLEASE DO NOT DOWNVOTE THIS ADD-ON SIMPLY BECAUSE IT'S NOT LISTED AS COMPATIBLE WITH THE ANKI 2.1 BETA. Downvoting add-on pages for no reason is not a valid way to get your point across. You made the conscious decision to test a development release of Anki, fully knowing that most add-ons would not work with it. If you are willing to test a development release of Anki, you should also be willing go through the marginally higher effort of installing the 2.1 development releases of your add-ons, which will usually be available through GitHub. Even if an add-on author has not yet had the chance to port their add-ons, you should not punish them just because they don't have the free time to update the open-source projects that they've decided to share with the community according to your schedule. If 2.1 compatibility of a specific add-on is crucial to your workflow, then you can either learn how to develop add-ons yourself and contribute to the project, or commission someone else to do the work for you. Thank you. CHANGES COMPARED TO IO 2.0 Here's a great overview by Med School Insiders on YouTube that goes over the key differences compared to older versions of IO. RELEASE LOG This section will always be updated with the latest changes to Image Occlusion Enhanced. More details on major releases are listed in the next section. For a full release log, including smaller bug fix releases and more details on each entry, make sure to check out the releases page on GitHub. 2017-04-17: v1.2.2 - Fixes a few smaller issues 2017-02-14: v1.2.0 - Usability improvements and under-the-hood changes 2016-01-14: v1.1.0 - New features, usability improvements, and bug fixes 2016-11-10: v1.0.0 - Ability to modify existing notes, among many other new features 2016-09-28: v0.3.0 - A large number of improvements to the Masks Editor 2016-04-03: v0.2.0 - Initial public release LATEST CHANGES AND NEWS 2017-04-17 A recent iOS-update might be affecting Image Occlusion 2.0 cards that were created earlier than 2015. If your occlusion masks are not drawn properly please use this supplementary add-on to fix them (thanks to mrestko for coming up with this solution). v1.2.2 INSTALLATION If you are starting from a fresh Anki installation you can simply follow the generic instructions listed below this add-on description. UPDATING Repeating the installation procedure will allow you to update to the latest release of the add-on. However, if you are upgrading from Image Occlusion 2.0 or early versions of Image Occlusion Enhanced please make sure to read the Wiki section on upgrading first. USAGE The use of this add-on is detailed in the Wiki and a series of video tutorials on YouTube. HELP Please check out the Troubleshooting section in the Wiki if you are experiencing issues with the add-on. Please DO NOT POST BUG REPORTS IN THE REVIEW SECTION, as there is no way for me to get in touch with you in order to troubleshoot the issue. Instead, please use the official support thread (no registration necessary!). Bug reports and suggestions are always welcome, but it might take me a while to get to them. CREDITS AND LICENSE Copyright © 2012-2015 Tiago Barroso Copyright © 2013 Steve AW Copyright © 2016-2017 Aristotelis P. Image Occlusion Enhanced is based on Image Occlusion 2.0 by Tiago Barroso and Simple Picture Occlusion by Steve AW. All credit for the original add-ons goes to their respective authors. Image Occlusion Enhanced would not exist without their work. I would also like to extend my heartfelt thanks to everyone who has helped with testing, provided suggestions, or contributed in any other way. Licensed under the GNU AGPL v3. The code for this add-on is available on GitHub. For more information on the licensing terms and other software shipped with this package please check out the README. OTHER ADD-ONS Make sure to also give some of my other add-ons a try: ADD-ON COMMISSIONS A lot of my add-ons were commissioned by fellow Anki users. If you enjoy my work and would like to hire my services to work on an add-on or new feature, please feel free to reach out to me at: ankiglutanimate [αt] gmail . com MORE RESOURCES Want to stay up-to-date with my latest add-on releases and updates? Feel free to follow me on Twitter: @Glutanimate New to Anki? Make sure to check out my YouTube channel where I post weekly tutorials on Anki add-ons and related topics: / Glutanimate ============================================ SUPPORT THIS ADD-ON Writing, supporting, and maintaining Anki add-ons like these takes a lot of time and effort. If Image Occlusion Enhanced has been a valuable asset in your studies, please consider using one of the buttons below to support my efforts by buying me a coffee, sandwich, meal, or anything else you'd like: Each and every contribution is greatly appreciated and will help me maintain and improve Image Occlusion Enhanced as time goes by!


As add-ons are programs downloaded from the internet, they are potentially malicious. You should only download add-ons you trust.

To download this add-on, please copy and paste the following code into the desktop program:


If you were linked to this page from the internet, please open Anki on your computer, go to the Tools menu and then Add-ons>Browse & Install to paste in the code.

Other Anki 2.0.x Add-Ons Ask a Question


on 1528891518
Simply superrrbbb!!! Most essential add-on for Anki..
on 1528757208
I love it!
on 1528502400
on 1528416000
One of the most amazing study tools I have pleasure of having in my toolkit.
on 1528416000
waiting for the update!
on 1527379200
Excellent, thanks a lot for this!
on 1526428800
Very good addon, helps to improve remembering
on 1526083200
Absolut nützliches Werkzeug für Bilder-Karteikarten
on 1525824000
Essential add-on
on 1525564800
very good
on 1525392000
If your your tracker jumps while making a rectangle.. it's probably your track pad and not anki....
on 1525392000
Makes learning anatomy so much easier and faster
on 1525046400
While trying to draw a rectangle with my trackpad, the cursor jumps like crazy!!
on 1524960000
One of the most useful addons to me! Making image occlusion flashcards in a breeze! Thanks a lot!
on 1524700800
Very easy to use and a huge time savor. Great for learning chemistry reaction paths
on 1524441600
best add-on ever.
on 1524355200
No image occlusion for anki 2.1 :(((
pls pls pls pls update soon! :)
on 1524096000
very helpful. thanks.
on 1522454400
It's good.
on 1521676800
Just what I need. Thank you!
on 1520985600
It's really good for biochemistry schemes!
on 1519344000
It's excellent, always improving
on 1519257600
It's a powerfull tool to use images.
on 1518134400
Very awesome!
on 1518048000
Amazing time saver!
on 1517616000
very good add-on! love it!
on 1517356800
Excellent add-on. Works well. Be sure to see the videos at: https://www.youtube.com/watch?v=c-4xOe79epU&list=PL3MozITKTz5YFHDGB19ypxcYfJ1ITk_6o&index=1
on 1517097600
Does not work with Anki.net or Anki.mobile, purchased a 25 dollar app to not be able to use my cards.
on 1516924800
Very practical, makes image cloze deletion a bliss!
on 1515888000
Awesome features, many different ways to make the notecards I want.
on 1515715200
Very helpful!
on 1515283200
Solid app for memorizing diagrams
on 1514246400
Just Awesome! Thank you ver much
on 1513900800
Super easy to add cards!
on 1513296000
I feel like this is actual treasure. What a boon to my education.
on 1512864000
There's this bug that occurs each time I import an image to the editor. The image doesn't appear whenever import an one to. All that appears is a grayscale image of the editor background.
on 1512691200
It's kinda easy to use, and very helpful, thanks for this addon
on 1511913600
Amazing add-on. So helpful for my studying! Thank you!
on 1511740800
Three kinds of "hiding modes" are rather useful for me.
on 1511136000
Incredibly easy and less time consuming than the traditionalmethod.
on 1510963200
easy to use.
on 1510531200
very help full mainly to a medical student........
on 1509235200

Does what it says. No problems with syncing, etc. Works just fine.

Anki Version 2.0.47
on 1508976000

Anki will crash with IOE installed. Removal of IOE fixes crashing on closing/syncing.

Other apps installed:
Night mode
Frozen fields
Load balancer

Removal of above apps does not fix crashing unless IOE is removed. Frustrating when I input 50+ new cards and lose them when syncing.
on 1504483200
Use it all the time! - Need a better way to edit old cards.

I love this addon, it saves lots of time introducing cards into the database. However, once its in the database - modifying the existing cards is quite difficult because you'll only see the occlusion objects.
on 1502496000
A Bug:"Add Cards:Hide All,Reveal All"

This option has a bug. I choose three rectangles. I want to hide 3 on the front and shows the three on the back. Press this button to add 3 CARDS. This is a bug. It is wrong.
The three CARDS are the same. They are all hide 3 on the front and shows three on the back. The right should be add 1 card.
on 1502150400
Image Occlusion Enhanced

Great ADD-ON
on 1495670400

A feature I’m really missing though is image import.
Sometimes I want to Import a whole list of blank images that I can edit later. But this is not possible because the hidden (id) is not generated.
on 1493424000

Now You can insert a new information in the picture and Update it. Before we need to delete the old and insert news cards withe the new image. Thanks a lot!
(sorry for my porr english)
on 1493424000
It has been a while it doesn't work. I don't know why
on 1492646400

This addon is amazing. Thank you for taking the time to develop so many useful addons!
on 1488326400
perfect for me, great help to learn

Thank you very much for your work, I am very grateful to you
on 1486598400
It's a little clunky and takes a bit of thinking at first to understand how it works, and I think it has too many unnecessary fields that can't be deleted (I learnt that quickly. I had to restore them manually). So far, I'm using it for cards that show the order of some things, and it only makes sense to hide everything and reveal everything, and I only need one card for that. Since there's no way to draw 4 rectangles in one go, I get 4 or 5 cards created and then have to delete all the unnecessary ones. I wish there was an option to create just the single "hide all, reveal all" card.
on 1485734400
This is a MUST add-on for Anki

Works great and amazingly with diagrams!
Helps with my study A LOT!
Thank you very very much!
on 1484697600
Great Addon

Really great addon. Just found it yesterday but I am sure I am going to use it a lot.

1 small improvement suggestion: I have a huge set of images where a question is at the top and the answer is at the bottom. I want to hide the answer to study.
As there are thousands of slides this takes a lot of effort to put into anki. The open new image from the edit screen definitely help. But applying the current setting to a batch of images would help a lot more. I could put all my slides into anki in a few seconds.
on 1479340800

Editing the previously made notes is the best part.
on 1476057600
in case youre getting SSL sync errors:

you need old image occlusion to properly sync your cards. then add this one on top. in order to install old image occlusion, you cant have image occlusion advanced.

i added anki onto a new computer when my old pc was only using the old image occlusion. you need old image occlusion to sync cards made with old image occlusion it seems.
on 1474502400
Great Update!

I gave up on image occlusion a while back. It was too buggy and caused more frustration than needed. This update solved all of my previous problems! Thank you!
on 1473120000

on 1473120000
works great until it becomes extremely buggy

This is such a great part of anki. But more than half the time when I use this plugin it becomes extremely buggy. Random occlusion boxes start multiplying everywhere. It makes me restart the app multiply times until I can finally get it to work normally. But, again, when it does work normally it is great!
on 1471392000
extremely smooth, simple and well designed

on 1470700800
Thank you....

Simply awesome!
on 1466294400
Thank you

Thank you so much for the time and effort you've put into updating this app. I cannot express my gratitude enough.

Thanks again.
on 1464220800
Should be included in the anki package

This add-on creates a whole new way of using Anki raising its value by a great margin.
on 1464134400
Really great but one feature needed

How do I edit the image while learning/reviewing? If I press edit on the card while reviewing, and then press the image occlusion button, it will open the editor. But any changes I make won't save to the card I'm reviewing. It will just create more notes if I press add ___ occlusion. How do I properly edit the card to remove shapes while reviewing?
on 1462838400
Thank you so much

on 1461283200

Hi, I love the changes you've made! For me, the biggest improvement is the "remarks" feature. I really like to add more info to come up below the image, once you've shown the answer. Is there any way to paste text or drag/drog a picture into the remarks field? I couldn't find a way to do so
on 1461110400
Image size

Great add-on.
In order to keep images in their original size while studying them (especially if you need to look at details), go to "browse" while viewing one of the occluded images, click on "Cards...", and add the following at the end of the "Styling" section:

img {max-width: none; max-height: none;}