ChessOcr OCR Chess Diagrams - Works Offline

    ChessOcr OCR Chess Diagrams - Works Offline icon

    ChessOcr OCR Chess Diagrams - Works Offline

    by: 449 7.8

    7.8 Users



    This app utilizes the camera to recognize Chess Diagrams in books using optical character recognition (OCR). It saves each recognized diagram in a pgn file, and also puts the most recent one in the clipboard as a FEN string. You can then invoke a chess program like DroidFish, or SCIDOnthego directly to analyze the position or do a data base search for games that contain this position. For best results the diagram should take up at least half the camera view, and the book be reasonably flat (there is some compensation for page warp). It works best for cameras that have autofocus capabilities, and will not work as well on cameras that can not autofocus. Also, some cameras are not very sensitive to light and require bright background lighting, while others work well even in low lighting conditions.

    If the chess diagrams are not being recognized, then try setting the video resolution higher than the default (say to 1280 x 720) and/or setting the ISO to a high value instead of leaving it on auto. Also remember to keep the page as flat as possible in reasonably bright light. A green box will appear around the diagram after one successful recognition. By default two identical recognition of the same diagram in a sequence are necessary (this can be changed in settings) for a final successful result. If you are only recognizing diagrams from modern books then you can usually set the double recognition flag to false.

    Before you try this app on your chess books you should take any pdf file from and print out a single page, and then try recognition of the diagram with ChessOcr. Recognition of the diagrams in these pdf files also works when they are displayed on a computer screen, but is not as reliable. If your device does not have autofocus then the app will likely not work well enough to satisfy you, but on devices with autofocus it works well on modern books. However, recognition is not as reliable for books with older fonts, or poorly printed diagrams.

    NOTE: If the app has recently stopped recognizing diagrams uncheck continuous autofocus in the settings.

    We now allow screen rotation, and can recognize in both landscape and portrait mode. Please look at the video to see the changes in Version 1.15 and upwards. If you don't want screen rotation then disable auto-rotation on your device, or revert to version 1.13 as described below:

    a) Uninstall ChessOcr from your device.
    b) In your device settings, security option check the box “Unknown sources” to allow app installation from places other than Google play.
    c) Now you can install ChessOcr Version 1.13 by selecting the file in a browser.
    d) Once installed go to Google Play, and search for ChessOcr and then once found touch the “:” button in the top right part of the screen, and disable autoupdate.

    You can also use a free database that I maintain to look up the games associated with a given recognized position as follows:

    1) Install ChessOcr app and SCIDOntheGo
    2) Download zip file then unzip and put these files in SCID directory.
    3) Start SCIDOntheGo app and do file open database, and keep this database open.
    4) Long press on the board, go to bottom of menu, and select "Retrieve position".
    5) First time set selection of ChessOcr to be the permanent association.
    6) Place diagram in middle of video, large as possible and press screen to start.
    7) Recognized position is drawn on screen, press which colour is to move.
    8) Resulting position is returned to SCIDOntheGO
    9) Do "Search, Search current board, Ok" and then pgn for matching games will be retrieved.

    You can use "Retrieve position" from the chess app DroidFish by doing long press on the board, going to the bottom of the menu, and then selecting "Retrieve Position".

    Tags: chessocr , chess ocr , chess ocr app gerhard , chessocrprokey , шахматная вёрства диаграмм

    Users review

    from 449 reviews



    Users comments for ChessOcr OCR Chess Diagrams - Works Offline

    veens FRZ

    by veens FRZ

    Oct 15, 2017  |  "Poor"

    Oh god great idea but I couldn't find the right way to use this

    Mark Watkins

    by Mark Watkins

    Mar 30, 2017  |  "Good"

    Useful app, not working on my new phone. This used to be a great tool on my old phone but seems to have problems with Android 7 on my new phone (HTC 10), it just comes up black then crashes. I've seen other apps ask for permission to access the camera at the time that access is needed but not this app, maybe that's the problem. Thanks for the cool app, I hope the issue can be fixed, I miss it. Thanks for the reply Gerhard, but I still can't get it to work on my Android 7 HTC 10. I can confirm that the app has permissions for storage and the camera. For your second suggestion: I can't enter ChessOcr settings to disable the continuous zoom as the app always crashes if I attempt to follow any menu items. Android did let me send a crash report, I don't know if you will have access to that.

    Kuldeep Sharma

    by Kuldeep Sharma

    Feb 16, 2017  |  "Poor"

    When I scan the image it takes 2 to 3 min. Second when it finalize the image and gives the option white to move black to move etch. Then it gives blank chess board. Now what i do with blank keyboard. Why i purchase pro and give money. If pro is working only then why u release free version. Means it doesn't work

    shekhar vishnu

    by shekhar vishnu

    Jan 19, 2017  |  "Awesome"

    not for notation?

    A Google user

    by A Google user

    Nov 23, 2016  |  "Awesome"

    Very good

    A Google user

    by A Google user

    Oct 05, 2016  |  "Awesome"

    Google play