Jordan Schatz shofetim

Using Google Cloud Vision API's OCR to extract text from photos and scanned documents

Just a quickie test in Python 3 (using Requests) to see if Google Cloud Vision can be used to effectively OCR a scanned data table and preserve its structure, in the way that products such as ABBYY FineReader can OCR an image and provide Excel-ready output.

The short answer: No. While Cloud Vision provides bounding polygon coordinates in its output, it doesn't provide it at the word or region level, which would be needed to then calculate the data delimiters.

On the other hand, the OCR quality is pretty good, if you just need to identify text anywhere in an image, without regards to its physical coordinates. I've included two examples:

####### 1. A low-resolution photo of road signs

With [Basic Auth][basic], who are your [co-workers][people]:

$ curl -H 'Authorization: Basic …' -H 'Accept: application/json' https://example.harvestapp.com/people
>   jq 'map(select(.user.is_active)) | map(.user | {first_name: .first_name, last_name: .last_name, id: .id})'
[
  {
    "id": 1234,
    "last_name": "Alice",
    "first_name": "Bobsdaughter"

},

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

	/*
	Filepicker lib must be loaded from script tag in HTML:
	<script type="text/javascript" src="//api.filepicker.io/v2/filepicker.js"></script>
	*/
	class FilepickerInput extends React.Component {

	componentDidMount() {
	const filepickerElement = this.refs.filepicker;
	if (typeof filepicker !== 'undefined') {
	// Single-page app integration: https://developers.filepicker.com/docs/support/integration/117

	;; This previously was CLJX but has now been updated to use cljc. Thanks @caskolkm
	;; https://gist.github.com/caskolkm/39d823f5bac7051d3062

	(ns app.logging
	(:refer-clojure :exclude [time])
	(:require #?(:clj [clojure.tools.logging :as log]
	:cljs [goog.log :as glog]))
	#?(:cljs (:import goog.debug.Console)))

	#?(:cljs

	(ns blog.errors.core
	(:require-macros
	[cljs.core.async.macros :refer [go]]
	[blog.utils.macros :refer [<?]])
	(:require
	[cljs.core.async :refer [>! <! chan close!]]))

	;; convert Node.js async function into a something
	;; that returns a value or error on a channel
	(defn run-task [f & args]

	/* Use WP-CLI instead https://developer.wordpress.org/cli/commands/search-replace/ */

	SET @oldsite='http://oldsite.com';
	SET @newsite='http://newsite.com';
	UPDATE wp_options SET option_value = replace(option_value, @oldsite, @newsite) WHERE option_name = 'home' OR option_name = 'siteurl';
	UPDATE wp_posts SET post_content = replace(post_content, @oldsite, @newsite);
	UPDATE wp_links SET link_url = replace(link_url, @oldsite, @newsite);
	UPDATE wp_postmeta SET meta_value = replace(meta_value, @oldsite, @newsite);

	/* only uncomment next line if you want all your current posts to post to RSS again as new */

	(ns n01se.externs-for-cljs
	(:require [clojure.java.io :as io]
	[cljs.compiler :as comp]
	[cljs.analyzer :as ana]))

	(defn read-file [file]
	(let [eof (Object.)]
	(with-open [stream (clojure.lang.LineNumberingPushbackReader. (io/reader file))]
	(vec (take-while #(not= % eof)
	(repeatedly #(read stream false eof)))))))