View All Posts
Want to keep up to date with the latest posts and videos? Subscribe to the newsletter
HELP SUPPORT MY WORK: If you're feeling flush then please stop by Patreon Or you can make a one off donation via ko-fi

As some of you may have seen a new version of SudokuGrab went out over the weekend.

This version features iCloud synching of your puzzles so if you capture them on one device they’ll be available on all your other devices (this will be the subject of an upcoming blog post in the near future).

I’ve also added support for iPads.

Unfortunately there’s a couple of bugs, I’ve submitted a new version to the app store this evening which should fix the most glaring problems. I’ll work through the remaining issues over the coming weeks - so keep those bug reports coming!


Related Posts

Updating Sudoku Grab - Currently, I am revitalizing Sudoku Grab, my first app ever, published in 2009. The plan involves updating the code, upgrading to ARC, simplifying the menu system, accommodating iOS7, and supporting 4-inch display sizes. Future updates may include iCloud syncing features for universal access to puzzles. This endeavor also gives me an excuse to switch to an iPhone5s!
25000 copies downloaded! - I'm thrilled to announce that Sudoku Grab has reached 25000 downloads! As a token of gratitude, the app will be available for free until the 25th June. A huge thank you to everyone who has purchased the app and for all the valuable feedback.
Mutiple Devices and User Defaults - In this blog, we're diving into the details of setting up and using iCloud's NSUbiquitousKeyValueStore to help persist settings in the new universal app version of Sudoku Grab. We'll look at how to enable cloud syncing for your app, handle updates from iCloud, and persist changes, allowing us to keep user settings consistent across devices. Note, this storage method is meant for small amounts of data with particular quotas - so keep an eye on your usage. For hands-on experience, there's a simple demo project on GitHub ready for you to experiment with!
Sudoku Grab Removed From Sale in Japan - Just got an email from Apple, claiming that my app 'Sudoku Grab' infringes on intellectual property rights of Nikoli.Co.Ltd. So, as a precaution, I've taken Sudoku Grab off the shelves in Japan.
How does it all work? - In this blog, I explain the process behind my Sudoku Grab app, a solution that uses basic image processing techniques to recognize Sudoku puzzles. This is done by locating the puzzle in an image, turning it back into a square form, segmenting it to find potential numbers, and lastly, recognizing those numbers. This involves simple thresholding techniques, blob extraction algorithm, perspective transform, and a Neural Network for Optical Character Recognition (OCR) to recognize digits from the photograph. I conclude by mentioning the potential for multiple enhancements to this process.

Related Videos

Sudoku Grab for the iPhone - Unleash the power of technology to effortlessly solve Sudoku puzzles with this incredible iPhone App available on the App Store! Click to learn more and get started.
Augmented Reality iPhone Sudoku Grab - Experience real-time augmented reality capture with the new version of Sudoku Grab! Learn to build your own app with detailed guidance provided in the linked article.
AR Sudoku Solver in Your Browser: TensorFlow & Image Processing Magic - Discover how to recreate a Sudoku app using browser APIs and ecosystem advancements, and explore the image processing pipeline technique for extracting Sudoku puzzles and solving them.
#Shorts - Wordle solving robot - Witness the incredible Wordle-solving robot in action! Click through to see how this fascinating machine tackles the popular word puzzle with ease.
Pong on the apple watch - Get a glimpse of a quick demo on playing Pong on the Apple Watch, skillfully hacked together at the iOSDevUK event! Don't miss out!
HELP SUPPORT MY WORK: If you're feeling flush then please stop by Patreon Or you can make a one off donation via ko-fi
Want to keep up to date with the latest posts and videos? Subscribe to the newsletter
Blog Logo

Chris Greening


> Image


A collection of slightly mad projects, instructive/educational videos, and generally interesting stuff. Building projects around the Arduino and ESP32 platforms - we'll be exploring AI, Computer Vision, Audio, 3D Printing - it may get a bit eclectic...

View All Posts