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| # Auto detect text files and perform LF normalization | ||
| * text=auto |
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| Copyright (c) 2013 Andrei Gheorghe | ||
| MIT License | ||
| Permission is hereby granted, free of charge, to any person obtaining | ||
| a copy of this software and associated documentation files (the | ||
| "Software"), to deal in the Software without restriction, including | ||
| without limitation the rights to use, copy, modify, merge, publish, | ||
| distribute, sublicense, and/or sell copies of the Software, and to | ||
| permit persons to whom the Software is furnished to do so, subject to | ||
| the following conditions: | ||
| The above copyright notice and this permission notice shall be | ||
| included in all copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| Copyright (c) 2013 Andrei Gheorghe | ||
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| MIT License | ||
|
|
||
| Permission is hereby granted, free of charge, to any person obtaining | ||
| a copy of this software and associated documentation files (the | ||
| "Software"), to deal in the Software without restriction, including | ||
| without limitation the rights to use, copy, modify, merge, publish, | ||
| distribute, sublicense, and/or sell copies of the Software, and to | ||
| permit persons to whom the Software is furnished to do so, subject to | ||
| the following conditions: | ||
|
|
||
| The above copyright notice and this permission notice shall be | ||
| included in all copies or substantial portions of the Software. | ||
|
|
||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| <!doctype html> | ||
| <html> | ||
| <head> | ||
| <title>ascii cam</title> | ||
| <meta charset="utf-8" /> | ||
| <link rel="stylesheet" href="css/main.css"/> | ||
| </head> | ||
| <body> | ||
| <h1 id="info">Please allow this page to access your camera.</h1> | ||
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| <div id="notSupported"> | ||
| <h1>Your browser does not support the Camera API.</h1> | ||
| <img src="http://idevelop.github.com/ascii-camera/images/screenshot.png" align="center" /> | ||
| </div> | ||
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| <pre id="ascii"></pre> | ||
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| <a href="https://github.com/idevelop/ascii-camera" id="fork" target="_blank"><img src="images/forkme.png" alt="Fork me on GitHub"></a> | ||
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| <script src="script/camera.js"></script> | ||
| <script src="script/ascii.js"></script> | ||
| <script src="script/app.js"></script> | ||
| </body> | ||
| <!doctype html> | ||
| <html> | ||
| <head> | ||
| <title>ascii cam</title> | ||
| <meta charset="utf-8" /> | ||
| <link rel="stylesheet" href="css/main.css"/> | ||
| </head> | ||
| <body> | ||
| <h1 id="info">Please allow this page to access your camera.</h1> | ||
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| <div id="notSupported"> | ||
| <h1>Your browser does not support the Camera API.</h1> | ||
| <img src="http://idevelop.github.com/ascii-camera/images/screenshot.png" align="center" /> | ||
| </div> | ||
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| <pre id="ascii"></pre> | ||
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| <a href="https://github.com/idevelop/ascii-camera" id="fork" target="_blank"><img src="images/forkme.png" alt="Fork me on GitHub"></a> | ||
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| <script src="script/camera.js"></script> | ||
| <script src="script/ascii.js"></script> | ||
| <script src="script/app.js"></script> | ||
| </body> | ||
| </html> |
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| /* | ||
| * ASCII Camera | ||
| * http://idevelop.github.com/ascii-camera/ | ||
| * | ||
| * Copyright 2013, Andrei Gheorghe (http://github.com/idevelop) | ||
| * Released under the MIT license | ||
| */ | ||
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| (function() { | ||
| var asciiContainer = document.getElementById("ascii"); | ||
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| camera.init({ | ||
| width: 160, | ||
| height: 120, | ||
| fps: 30, | ||
| mirror: true, | ||
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| onFrame: function(canvas) { | ||
| ascii.fromCanvas(canvas, { | ||
| // contrast: 128, | ||
| callback: function(asciiString) { | ||
| asciiContainer.innerHTML = asciiString; | ||
| } | ||
| }); | ||
| }, | ||
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| onSuccess: function() { | ||
| document.getElementById("info").style.display = "none"; | ||
| }, | ||
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| onError: console.error, | ||
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| onNotSupported: function() { | ||
| document.getElementById("info").style.display = "none"; | ||
| document.getElementById("notSupported").style.display = "block"; | ||
| } | ||
| }); | ||
| /* | ||
| * ASCII Camera | ||
| * http://idevelop.github.com/ascii-camera/ | ||
| * | ||
| * Copyright 2013, Andrei Gheorghe (http://github.com/idevelop) | ||
| * Released under the MIT license | ||
| */ | ||
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| (function() { | ||
| var asciiContainer = document.getElementById("ascii"); | ||
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| camera.init({ | ||
| width: 160, | ||
| height: 120, | ||
| fps: 30, | ||
| mirror: true, | ||
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| onFrame: function(canvas) { | ||
| ascii.fromCanvas(canvas, { | ||
| // contrast: 128, | ||
| callback: function(asciiString) { | ||
| asciiContainer.innerHTML = asciiString; | ||
| } | ||
| }); | ||
| }, | ||
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| onSuccess: function() { | ||
| document.getElementById("info").style.display = "none"; | ||
| }, | ||
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| onError: console.error, | ||
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| onNotSupported: function() { | ||
| document.getElementById("info").style.display = "none"; | ||
| document.getElementById("notSupported").style.display = "block"; | ||
| } | ||
| }); | ||
| })(); |
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| // Author: Andrei Gheorghe (http://github.com/idevelop) | ||
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| var ascii = (function() { | ||
| function asciiFromCanvas(canvas, options) { | ||
| // Original code from http://www.nihilogic.dk/labs/jsascii/ | ||
| // Heavily modified by Andrei Gheorghe (http://github.com/idevelop) | ||
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| var characters = (" .,:;i1tfLCG08@").split(""); | ||
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| var context = canvas.getContext("2d"); | ||
| var canvasWidth = canvas.width; | ||
| var canvasHeight = canvas.height; | ||
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| var asciiCharacters = ""; | ||
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| // calculate contrast factor | ||
| // http://www.dfstudios.co.uk/articles/image-processing-algorithms-part-5/ | ||
| var contrastFactor = (259 * (options.contrast + 255)) / (255 * (259 - options.contrast)); | ||
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| var imageData = context.getImageData(0, 0, canvasWidth, canvasHeight); | ||
| for (var y = 0; y < canvasHeight; y += 2) { // every other row because letters are not square | ||
| for (var x = 0; x < canvasWidth; x++) { | ||
| // get each pixel's brightness and output corresponding character | ||
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| var offset = (y * canvasWidth + x) * 4; | ||
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| var color = { | ||
| red: imageData.data[offset], | ||
| green: imageData.data[offset + 1], | ||
| blue: imageData.data[offset + 2], | ||
| alpha: imageData.data[offset + 3] | ||
| }; | ||
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| // increase the contrast of the image so that the ASCII representation looks better | ||
| // http://www.dfstudios.co.uk/articles/image-processing-algorithms-part-5/ | ||
| var contrastedColor = { | ||
| red: bound(Math.floor((color.red - 128) * contrastFactor) + 128, [0, 255]), | ||
| green: bound(Math.floor((color.green - 128) * contrastFactor) + 128, [0, 255]), | ||
| blue: bound(Math.floor((color.blue - 128) * contrastFactor) + 128, [0, 255]), | ||
| alpha: color.alpha | ||
| }; | ||
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| // calculate pixel brightness | ||
| // http://stackoverflow.com/questions/596216/formula-to-determine-brightness-of-rgb-color | ||
| var brightness = (0.299 * contrastedColor.red + 0.587 * contrastedColor.green + 0.114 * contrastedColor.blue) / 255; | ||
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| var character = characters[(characters.length - 1) - Math.round(brightness * (characters.length - 1))]; | ||
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| asciiCharacters += character; | ||
| } | ||
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| asciiCharacters += "\n"; | ||
| } | ||
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| options.callback(asciiCharacters); | ||
| } | ||
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| function bound(value, interval) { | ||
| return Math.max(interval[0], Math.min(interval[1], value)); | ||
| } | ||
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| return { | ||
| fromCanvas: function(canvas, options) { | ||
| options = options || {}; | ||
| options.contrast = (typeof options.contrast === "undefined" ? 128 : options.contrast); | ||
| options.callback = options.callback || doNothing; | ||
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| return asciiFromCanvas(canvas, options); | ||
| } | ||
| }; | ||
| })(); | ||
| // Author: Andrei Gheorghe (http://github.com/idevelop) | ||
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| var ascii = (function() { | ||
| function asciiFromCanvas(canvas, options) { | ||
| // Original code by Jacob Seidelin (http://www.nihilogic.dk/labs/jsascii/) | ||
| // Heavily modified by Andrei Gheorghe (http://github.com/idevelop) | ||
|
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| var characters = (" .,:;i1tfLCG08@").split(""); | ||
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| var context = canvas.getContext("2d"); | ||
| var canvasWidth = canvas.width; | ||
| var canvasHeight = canvas.height; | ||
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| var asciiCharacters = ""; | ||
|
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| // calculate contrast factor | ||
| // http://www.dfstudios.co.uk/articles/image-processing-algorithms-part-5/ | ||
| var contrastFactor = (259 * (options.contrast + 255)) / (255 * (259 - options.contrast)); | ||
|
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| var imageData = context.getImageData(0, 0, canvasWidth, canvasHeight); | ||
| for (var y = 0; y < canvasHeight; y += 2) { // every other row because letters are not square | ||
| for (var x = 0; x < canvasWidth; x++) { | ||
| // get each pixel's brightness and output corresponding character | ||
|
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| var offset = (y * canvasWidth + x) * 4; | ||
|
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| var color = { | ||
| red: imageData.data[offset], | ||
| green: imageData.data[offset + 1], | ||
| blue: imageData.data[offset + 2], | ||
| alpha: imageData.data[offset + 3] | ||
| }; | ||
|
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| // increase the contrast of the image so that the ASCII representation looks better | ||
| // http://www.dfstudios.co.uk/articles/image-processing-algorithms-part-5/ | ||
| var contrastedColor = { | ||
| red: bound(Math.floor((color.red - 128) * contrastFactor) + 128, [0, 255]), | ||
| green: bound(Math.floor((color.green - 128) * contrastFactor) + 128, [0, 255]), | ||
| blue: bound(Math.floor((color.blue - 128) * contrastFactor) + 128, [0, 255]), | ||
| alpha: color.alpha | ||
| }; | ||
|
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| // calculate pixel brightness | ||
| // http://stackoverflow.com/questions/596216/formula-to-determine-brightness-of-rgb-color | ||
| var brightness = (0.299 * contrastedColor.red + 0.587 * contrastedColor.green + 0.114 * contrastedColor.blue) / 255; | ||
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| var character = characters[(characters.length - 1) - Math.round(brightness * (characters.length - 1))]; | ||
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| asciiCharacters += character; | ||
| } | ||
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| asciiCharacters += "\n"; | ||
| } | ||
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| options.callback(asciiCharacters); | ||
| } | ||
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| function bound(value, interval) { | ||
| return Math.max(interval[0], Math.min(interval[1], value)); | ||
| } | ||
|
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| return { | ||
| fromCanvas: function(canvas, options) { | ||
| options = options || {}; | ||
| options.contrast = (typeof options.contrast === "undefined" ? 128 : options.contrast); | ||
| options.callback = options.callback || doNothing; | ||
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| return asciiFromCanvas(canvas, options); | ||
| } | ||
| }; | ||
| })(); |
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