Robert Price http://www.robertprice.co.uk/ The latest entries from Robert Price's blog. en-gb Using The DOM Ready Event http://www.robertprice.co.uk/robblog/archive/2012/5/Using_The_DOM_Ready_Event.shtml One of the great advantages of using a library like jQuery is that is provides functions like ready() so you can activate your JavaScript code when the DOM is ready, and not when everything has bee... Grayscaling An HTML5 Canvas http://www.robertprice.co.uk/robblog/archive/2012/5/Grayscaling_An_HTML5_Canvas.shtml I've been looking at how to turn a colour image into a grayscale one using JavaScript on an HTML 5 Canvas. I had done something similar a few years back to an image using Perl. Wikipedia has a good... Scaling An Image In An HTML5 Canvas http://www.robertprice.co.uk/robblog/archive/2012/5/Scaling_An_Image_In_An_HTML5_Canvas.shtml As part of my Draw Something Solver, I've been working with HTML 5 Canvas objects quite a bit. As I want my application to work on all iPhones, I need to support both regular and retina displays. A... Serialising A JavaScript Object To JSON http://www.robertprice.co.uk/robblog/archive/2012/5/Serialising_A_JavaScript_Object_To_JSON.shtml As part of my Draw Something Solver I needed to convert a JavaScript object to a string of JSON data. In the past I'd have resorted to a bit of library code, but as I am coding to a recent version ... Draw Something Solver - First OCR Attempt http://www.robertprice.co.uk/robblog/archive/2012/5/Draw_Something_Solver_First_OCR_Attempt.shtml As part of my Draw Something Solver, I have worked out how to load and extract images from an HTML 5 canvas, now I need to work out what letters the images represent. I am hoping that as the images... Extracting And Drawing Part Of An Image Into An HTML5 Canvas http://www.robertprice.co.uk/robblog/archive/2012/5/Extracting_And_Drawing_Part_Of_An_Image_Into_An_HTML5_Canvas.shtml As part of my Draw Something Solver, I need to be able to extract the letters from the screenshot image. I've already looked at loading an image into a HTML 5 canvas object in an earlier post, so I... Loading An Image Into An HTML5 Canvas http://www.robertprice.co.uk/robblog/archive/2012/5/Loading_An_Image_Into_An_HTML5_Canvas.shtml As part of my Draw Something Solver, I need to be able to load an image into an HTML 5 Canvas. I thought I'd share the solution to help others. Firstly, assume you have an HTML page with an empty c...