keyFilename = YOUR_KEY_FILE_NAME;
projectId = YOUR_PROJECT_ID;
translateKey = YOUR_TRANSLATE_KEY;
var mraa = require("mraa");
'use strict';
var touch_sensor_value = 0, last_t_sensor_value;
var digital_pin_D2 = new mraa.Gpio(2);
digital_pin_D2.dir(mraa.DIR_IN);
var jsUpmI2cLcd = require('jsupm_i2clcd');
var lcd = new jsUpmI2cLcd.Jhd1313m1(6, 0x3E, 0x62);
var working = false;
lcd.setColor(0, 0, 255);
lcd.setCursor(0, 0);
lcd.write('Initializing Goo');
lcd.setCursor(1, 0);
lcd.write('gle API... ');
var vision = require('gcloud')({
keyFilename: keyFilename,
projectId: projectId
}).vision();
var googleTranslate = require('google-translate')(translateKey);
lcd.setColor(0, 255, 0);
lcd.setCursor(0, 0);
lcd.write('Ready! ');
lcd.setCursor(1, 0);
lcd.write(' ');
var detect = function () {
vision.detectText('result.png', function (err, text) {
if (text && text[0]) {
var string = text[0].replace(/(?:\r\n|\r|\n)/g, ' ').replace(/[^0-9a-z ]/gi, '');
console.log(string);
googleTranslate.translate(string, 'en', function (err, translation) {
console.log(translation.translatedText);
lcd.setColor(255, 255, 255);
lcd.setCursor(0, 0);
lcd.write(' ');
lcd.setCursor(0, 0);
lcd.write(translation.translatedText.slice(0, 16));
lcd.setCursor(1, 0);
lcd.write(' ');
lcd.setCursor(1, 0);
lcd.write(translation.translatedText.slice(16, 31));
working = false;
});
} else {
lcd.setColor(255, 0, 0);
lcd.setCursor(0, 0);
lcd.write('Error... ');
lcd.setCursor(1, 0);
lcd.write(' ');
working = false
}
});
};
setInterval(function () {
touch_sensor_value = digital_pin_D2.read();
if (touch_sensor_value === 1 && last_t_sensor_value === 0 && !working) {
lcd.setColor(0, 0, 255);
lcd.setCursor(0, 0);
lcd.write('Taking Picture..');
lcd.setCursor(1, 0);
lcd.write('. ');
working = true;
main();
}
last_t_sensor_value = touch_sensor_value;
}, 500);
var main = function () {
takePicture();
}
var takePicture = function () {
var v4l2camera = require("v4l2camera");
var cam = new v4l2camera.Camera("/dev/video0");
if (cam.configGet().formatName !== "YUYV") {
console.log("YUYV camera required");
process.exit(1);
}
cam.configSet({width: 352, height: 288});
cam.start();
times(6, cam.capture.bind(cam), function () {
var rgb = yuyv2rgb(cam.toYUYV(), cam.width, cam.height);
saveAsPng(rgb, cam.width, cam.height, "result.png");
cam.stop();
});
};
var ocr = function () {
lcd.setColor(0, 0, 255);
lcd.setCursor(0, 0);
lcd.write('Executing pictur');
lcd.setCursor(1, 0);
lcd.write('e... ');
setTimeout(detect, 3000);
}
var times = function (n, async, cont) {
return async(function rec(r) {return --n == 0 ? cont(r) : async(rec);});
};
var saveAsPng = function (rgb, width, height, filename) {
var fs = require("fs");
var pngjs = require("pngjs");
var png = new pngjs.PNG({
width: width, height: height, deflateLevel: 1, deflateStrategy: 1,
});
var size = width * height;
for (var i = 0; i < size; i++) {
png.data[i * 4 + 0] = rgb[i * 3 + 0];
png.data[i * 4 + 1] = rgb[i * 3 + 1];
png.data[i * 4 + 2] = rgb[i * 3 + 2];
png.data[i * 4 + 3] = 255;
}
png.pack().pipe(fs.createWriteStream(filename));
lcd.setColor(0, 255, 0);
lcd.setCursor(0, 0);
lcd.write('Picture successf');
lcd.setCursor(1, 0);
lcd.write('ully taken! ');
ocr();
};
var minmax = function (min, v, max) {
return (v < min) ? min : (max < v) ? max : v;
};
var yuv2r = function (y, u, v) {
return minmax(0, (y + 359 * v) >> 8, 255);
};
var yuv2g = function (y, u, v) {
return minmax(0, (y + 88 * v - 183 * u) >> 8, 255);
};
var yuv2b = function (y, u, v) {
return minmax(0, (y + 454 * u) >> 8, 255);
};
var yuyv2rgb = function (yuyv, width, height) {
var rgb = new Array(width * height * 3);
for (var i = 0; i < height; i++) {
for (var j = 0; j < width; j += 2) {
var index = i * width + j;
var y0 = yuyv[index * 2 + 0] << 8;
var u = yuyv[index * 2 + 1] - 128;
var y1 = yuyv[index * 2 + 2] << 8;
var v = yuyv[index * 2 + 3] - 128;
rgb[index * 3 + 0] = yuv2r(y0, u, v);
rgb[index * 3 + 1] = yuv2g(y0, u, v);
rgb[index * 3 + 2] = yuv2b(y0, u, v);
rgb[index * 3 + 3] = yuv2r(y1, u, v);
rgb[index * 3 + 4] = yuv2g(y1, u, v);
rgb[index * 3 + 5] = yuv2b(y1, u, v);
}
}
return rgb;
};
f3.js