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Instructions and Help about extract text from image in javascript

Hey guys welcome back to another video in today's video I'm going to be walking through how you take an image and if there's text within that image and convert that into actual text that you can process whether it be some kind of program or you want to just use that for your own personal reasons and the best part is you're gonna be able to do this in three lines of code now I embellished a little bit although only you are going to be using three lines of code there's a lot of additional code that goes behind this what I've done is I've just written the program on top of a couple of other programs to make it very simple for you there's a lot of hard work that other coders have put into this I've also contributed a little bit as well but at the end of the day you're just gonna get a program that's going to allow you to execute a few things within three lines one you can take any URL or you can take an actual path directory path on your computer and you can input it into there and it'll actually spit out the text for you but then you may be asking yourself wait a minute there's tons of apps that do that why am I going to bother taking an image when I can just do that very quickly with my phone but when you think of most of the things that are built in Python they're built around scale and what you want to be able to do is you want to be able to scale that technology or scale that program that you build now while it may be okay for you to go ahead and take one or two or three programs and try to you know extract the text out of an image can you imagine doing that for 10 20 30 50 or even 100 images the best part of this is there's another function that I wrote for you again only three lines of code that's going to allow you to take how many ever number of images you have with three lines of code extract the text from every single image and put it into an Excel spreadsheet for you pretty cool now the one thing to keep in mind is although tesseract is a really really good tool you have other large organizations out there like Google and Facebook and Amazon that actually have their own api's and they have much much more further research done into this a tesseract is managed by Google however Google will consistently train the training data so that it applies more to whatever they're looking for so their accuracy far supersedes what we're going to get to today and you can always use the api's and some of them do have free tiers but a lot of them you have to.

FAQ

What are the most useful gems to use in Rails?
RubyGems were developed to simplify and accelerate the stages of the application creation deployment and library connection. Utilizing this package manager for Ruby saves you time as you get ready-made solutions to almost any task instead of writing the functions from scratch. Each gem contains a particular element of functionality including all related files. Unfortunately they aren structured in any way so in order to find ruby gems it better to use a regular search engine and the required key words (check GitHub s ). Our dedicated development team also actively employs Ruby Gems in the process of software development. Here is the top of the most popular and useful ruby gems according to our experience GeoCoder s . Being able to connect through itself over 4 APIs this Ruby gem implements both the direct and reverse geocoding by IP address geographical coordinates and even real physical addresses (e.g. the address of the street). Bullet s . The most downloaded Ruby gems out there. It was initially created with an intention to boost software performance. It does so by decreasing the total amount of client-server requests. Basically Bullet tracks the N+1 cases of requests and notifies the developer when other tools can be used instead (e.g. cache counter). Pry s . We rmend to simplify the bug fixing procedures for your RoR-based application with the Pry gem which is a more advanced alternative to the standard IRB wrapper. ActiveModelSerializers s (which starts lagging while processingpound documents) and uses caching. Fast JSON API s . Fast JSON API wille in handy when you need fast serialization of software code. It works much faster than Wicked PDF s . This gem is working alongside with wkhtmltopdf s and helps realizing an interaction with the DSL generator. Devise Masquerade s . This Ruby gem helps developing multi user apps. In particular youll be able to test your app from the perspective of users with different levels of access. Devise s . Based on the MVC model the Devise gem can provide secure user authentication and session management. Letter opener s . If you need to create a newsletter mechanism to send notifications to all users that launched your app this gem will help you do that much easier you won need to integrate and configure your own SMTP server. Money Rails s . If you are planning to integrate your app with Ruby Money this gem wille in quite handy. Pundit s . A tool that allows defining different levels of access to the app functionality according to the rights of an authorized user.
What is Node.js used for in simple terms?
I'm going to assume that I am exing this to a total non-techie so pardon me if I go into things that are a bit too rudimentary. Are you familiar with Javascript? In case you're not it's a web-based scripting language that's primarily used to manipulate the HTML of a page. So using Javascript you can manipulate tables divs fonts etc. to do things using traditional programming functionality. Javascript is known as a client-side language and what this means is that the changes effected to a page through JS are seen only by you the client. In other words lets say you click on a button and that button executes a Javascriptmand which changes the background colour of the website blue. That change in blue will only italic be seen by you not by anyone else and it will go away the moment you refresh. Why? Because Javascript interacts only with you the client and has no interaction with the server which actually hosts the background colour. Its usage are restricted to the page you are currently viewing and your individual interactions with it. This is known generally as working on the front end . On the other hand you've got a language like PHP which interacts directly with a server. So in this case clicking a button could execute a PHP script which actually goes into the server itself and changes the background color. Now the background colour has actually been changed on the back-end and everyone who visits the website will see the changed background color. This is known as server-side scripting or the back end . PHP cannot directly manipulate the HTML on the page on a client-side basis. Here's an example to illustrate the concept. Type this into your browser window (it won't do anything crazy don't worry) (body). = red;void(); Your page should now be red. This isn't a permanent change and it only happens to you -- it'll go away on refresh. That's what Javacript does -- it changes the stuff on your screen. Nowpare that to say changing your password... that makes a permanent change in the backend. in the simplest most basic terms is a framework to develop server-side applications using the JavaScript language. Its usage are effectively limited to the advantages of the programming language JavaScript over alternative methodologies. tl;dr - is effectively a server-side implementation of JavaScript. It allows you to in a very nifty way write the backend of the application in JavaScript. I hope that helped.
Do front-end developers also make the graphics for the websites?
No usually there's a clear separation between graphic designers and user experience guys on the conceptional side of a project and the developers on the other. Photoshop is usually not a prerequisite for landing a front-end developer job. Front-end development has clearly moved away from web design over the last years. But it won't hurt if you know a few basics in Photoshop. Like how to work with layers how to resize file sizes how to extract from layouts. Basic stuff you would learn from introductory tutorials and a little bit of experimentation. In the project before my current one the designers would definitely not let developers touch any of their graphics. They delivered all graphics isolated and in all the required resolutions whenever necessary. They even used some form of version control for their graphics themselves. My current project is more fast-paced and campaign-oriented. So it's okay for designers UX specialists if front-end developers occasionally do some tweaking in Photoshop themselves. (We have Photoshop licenses routinely installed on frontend developer machines.) If you're pondering on what to learn next whether learning how to design UI elements in Illustrator or Photoshop or how to transform given graphics say into SVG and work some JavaScript on it -- I'd rmend choosing the latter.
How do I protect the text from being copied and pasted from my website?
To prevent most people from copying and pasting while keeping the content accessible to paying customers somemon approaches are disabling highlighting with CSS or disabling con menus (right-click) and default keyboard shortcuts for copy or cut (ctrl+c+x) by listening for those events with JavaScript and redirecting the default actions taken. Many measures preventing copy and paste (duplication; a fundamental aspect ofputing) recreate the information in ways that are sometimes less convenient to transmit usually proprietary add unwanted limitations to your paying user base and degrade the user experience by placing more hoops in front of the user potentially introducing vulnerabilities all along the way to your site user machines and the network. If information is transmitted from your website to anywhere else it is already duplicated many times at various degrees of usability. You might try forming the information content in a way that is unusable iplete or dependent on con that is unavailable. Make it offensive as possible. Have it read as if it were pure nonsense. By appearing undesirable no one will bother.
What should front-end web developers know about the browser engine?
As a front-end developer the browser is your main tool for almost everything youll code (despite maybe the tooling-setup process) so my tip here is know as much as you can about it. In a nutshell understanding how browsers work will have a significant improvement on your project performance usability and accessibility. Understanding of topics like Rendering Engine how browser render your code? Construction of the render tree how browsers render the DOM and how itpute styles? Painting which elements renders first and how overall painting works? Will give you a wider vision and give you advantage on several performance tests and not to mention the readability and maintanability of your code. Youll know how it works and will know how to take advantage of it. There are several s that could help you with getting started to think on a browser view italic some of them outdated but as far as I can tell core browsers mechanism remains the same. How Browsers Work Behind the scenes of modern web browsers - HTML5 Rocks (good first reading) How browsers work (great collection about several concepts) How Web Browsers Work by Alex Russell - Day of JavaScript on Mobile s Talk Ryan Seddon - So how does the browser actually render a website s
How do I download hover-text in xkcd.com comics?
In each page there is a div called
I need to parse some data from pdf files. Can this be done using Javascript and/or Node modules or would Python be better suited for this task?
I will answer from Python perspective because that is what I accustomed with but right of the but I can tell you it is not pretty and I guarantee because of huge opensourcemunity supporting both Python and Javascript both have some tools for dealing with PDFs but they are far from perfect. Hopefully they will prove good enough for your purposes. No matter the language this task may prove challenging depending on PDF file provided and what you are trying to extract from it. For general data extraction from PDF you will want to grab s (a port of original pdfminer to Python 3). If you just want to get and in case of PDFs (or any other of source file) which are just bunch of images stitched together have them OCRed automatically there is ract italic s . italic If you are mostly interested in tabular data then checkout pdftabextract s API is not the nicest but seems most beprehensive tool for this task out there. I must admit that between PyPDF2 pdftabextract Python tools for PDF processing seem quite archaic (their API at least). ract being nice exception. Thus if PDF processing capabilities are what is supposed to push you to switch from to Python then I wouldn do it as at very least if tools in javascript space won prove to be better they will have a more friendly API.
What is JSON?
I have a friend who had a really italic hard time wrapping his head around JSON because he never worked with it and even though weve studied Computer Science together programming hasn been his strongest suit. No matter how hard I tried exing what it is with words in the end he still thinks it someplicated language of mystery that only the pros know. Here my take at exing JSON for the layman horizontal-rule The Concept of JSON Imagine the country Norway italic wanting to send some important piece of information to the country Spain italic . Now how do they go about doing this? Norway could send the message in Norwegian italic and let Spain find a person who knows both Norwegian AND Spanish and is able to translate from one language to the other. Or Norway could find someone who knows both Norwegian AND Spanish and first translate the message from Norwegian to Spanish and then send it over. In either case we need someone who knows both italic of the languages. If Norway and Spain want to send messages back and forth to each other both of them need someone who knows both of the languages. Isn that making things a bit tooplicated? What if we could make things simpler by incorporating a new italic language that both understand? That would certainly make things simpler right? Enter the lingua franca English italic . If both Norway and Spain instead use the English language to send their messages back and forth neither of them would need to know Spanish or Norwegian. It just onemon language used to understand each other. However for the sake of understanding let say that English is only the language for munication italic between the countries. When Norway receives a message in English from Spain they would still need to translate it to Norwegian because reasons! Likewise if Spain were to receive a message in English from Norway they would still have to translate it into Spanish to let say.. uhh.. to further work with their laws which are specifically in Spanish! (play along with me here) But why then learn English if theyre anyways going to translate it back to their native language? Imagine that Norway and Spain don only send message to each other but alsomunicate with France Pakistan Switzerland and Russia. All those countries have their own languages. Having to know and translate to all those languages would be pretty difficult don you think? Instead each country knows English in addition to their own language. Then any country can send a message to another country in English and then the receiving country can translate from English to their own language. There now one universal language formunication! That the idea italic of JSON. Instead of understanding how any of the programming languages work there is amon language solely used formunication. If for example PHP and Javascript want to send each other information they don need both have learnt PHP AND Javascript and translate back and forth in order tomunicate. Instead they use the lingua franca ofmunication in programming JSON to send each other messages. These message can then be translated from JSON into their respective language. You are now able to learn only one programming language in addition to themunications language JSON in order tomunicate with ANY other programming language. But hold on a second you mightve heard people say that JSON is NOT a programming language . And that is correct it is NOT ! Although the analogy with the countries works well with exing WHAT JSON is it fails at exing HOW JSON works. After all English is aplicated language that takes a lot of time to learn. The JSON language is very simple and easy to learn. So let make another analogy for the JSON language and its grammar. horizontal-rule How JSON Works Now let forgetmunication between countries for a second. Imagine your boss at your new job wants you to write him a report on all the new cars in 217. You take on the task with all your might in hopes to make a great list of all the new cars in 217! Here is what you give to your boss Text Source Car - Wikipedia s Now then I don think he be too italic pleased with it even though you put in a lot of effort gathering the information. But you gave him exactly what he asked italic for right? Yes you did a fine job. The problem italic is that your boss wants to put the list of cars into his online scrapbook and if putting all the cars and information in there wasn enough work already he now also has to actually read understand and get an overview over all the cars and their corresponding information from your wall of . Heck even reading italic and understanding italic that report alone is so off-putting! You are slightly disheartened by this considering your efforts. However you refuse to yield and decide to give your report another go. This time you turn in this organized report It got a Table of Contents colored sections and a nice format which makes the information super easy to find and read. You go and hand the report to your boss. Your boss wants to find the new Batmobile model so he opens the Table of Contents which looks like this Okay so apparently the Batmobile is located on page 3 your boss thinks. He proceeds to turn to page 3. What he finds is something similar to this There a clear title for the page and this page is divided into three headers . Everything has a good structure so finding the information is seamless and super easy! All the other cars have a similar page with the same structure. Your boss can turn to any page in the cars section and expect it to have the same structure with a description the color and an s 812 134 master_ s zoomable s 873 968 master_ s zoomable to zoom) That basically it the list of cars we want to convey in JSON format. This piece of above can be sent to any programming language and since JSON format is so popular that language will probably have the Manual on how to read JSON italic pre-built in its system. Many of these languages will also have pre-built functionality to convert any piece of into italic JSON format (so that it looks like the shown above). horizontal-rule I really hope this lengthy post helps anyone still struggling with understanding JSON and what it really is just a really simple message format. I can believe it took me 3 hours to write this that certainly wasn accounted for haha. Enjoy and share ) TL;DR JSON is like wrapping your message in a nice gift box and sending it so that anyone italic can open it and get the message.