问题
I had clone git library of OCR using this link .
git clone git://github.com/thiagoalessio/tesseract-ocr-for-php.git
then simply i include the required file by following this example
here is the example code which i m trying to run
require_once './src/TesseractOCR.php';
$tesseract = new TesseractOCR('text.png');
$text = $tesseract->recognize();
echo "The recognized text is:", $text;
But always it fires a fatal Error
Fatal error: Uncaught Error: Call to undefined method TesseractOCR::recognize()
Edit I tried to use run() instead of recognize()
require_once './src/TesseractOCR.php';
$tesseract = new TesseractOCR('text.png');
$text = $tesseract->run();
var_dump($text);
echo PHP_EOL, "The recognized text is:", $text, PHP_EOL;
Then result is : string(0) "" The recognized text is:
I had tried my best to find some appropriate solution but failed to find some authentic solution
回答1:
This sample code probably comes from this article or some similar. But I can see that it's over 1,5 year old and apparently it's outdated.
Take a look at their github's page. It looks like it's run() instead of recognize() right now:
<?php
echo (new TesseractOCR('german.png'))
->run();
回答2:
***Get all texts from images using php OCR***
Include HTTP/Request2.php library.
Include **Net/URL2.php** :
<?php
class Net_URL2
{
const OPTION_STRICT = 'strict';
const OPTION_USE_BRACKETS = 'use_brackets';
const OPTION_DROP_SEQUENCE = 'drop_sequence';
const OPTION_ENCODE_KEYS = 'encode_keys';
const OPTION_SEPARATOR_INPUT = 'input_separator';
const OPTION_SEPARATOR_OUTPUT = 'output_separator';
private $_options = array(
self::OPTION_STRICT => true,
self::OPTION_USE_BRACKETS => true,
self::OPTION_DROP_SEQUENCE => true,
self::OPTION_ENCODE_KEYS => true,
self::OPTION_SEPARATOR_INPUT => '&',
self::OPTION_SEPARATOR_OUTPUT => '&',
);
private $_scheme = false;
private $_userinfo = false;
private $_host = false;
private $_port = false;
private $_path = '';
private $_query = false;
private $_fragment = false;
public function __construct($url, array $options = array())
{
foreach ($options as $optionName => $value) {
if (array_key_exists($optionName, $this->_options)) {
$this->_options[$optionName] = $value;
}
}
$this->parseUrl($url);
}
public function __set($var, $arg)
{
$method = 'set' . $var;
if (method_exists($this, $method)) {
$this->$method($arg);
}
}
public function __get($var)
{
$method = 'get' . $var;
if (method_exists($this, $method)) {
return $this->$method();
}
return false;
}
public function getScheme()
{
return $this->_scheme;
}
public function setScheme($scheme)
{
$this->_scheme = $scheme;
return $this;
}
public function getUser()
{
return $this->_userinfo !== false
? preg_replace('(:.*$)', '', $this->_userinfo)
: false;
}
public function getPassword()
{
return $this->_userinfo !== false
? substr(strstr($this->_userinfo, ':'), 1)
: false;
}
public function getUserinfo()
{
return $this->_userinfo;
}
public function setUserinfo($userinfo, $password = false)
{
if ($password !== false) {
$userinfo .= ':' . $password;
}
if ($userinfo !== false) {
$userinfo = $this->_encodeData($userinfo);
}
$this->_userinfo = $userinfo;
return $this;
}
public function getHost()
{
return $this->_host;
}
public function setHost($host)
{
$this->_host = $host;
return $this;
}
public function getPort()
{
return $this->_port;
}
public function setPort($port)
{
$this->_port = $port;
return $this;
}
public function getAuthority()
{
if (false === $this->_host) {
return false;
}
$authority = '';
if (strlen($this->_userinfo)) {
$authority .= $this->_userinfo . '@';
}
$authority .= $this->_host;
if ($this->_port !== false) {
$authority .= ':' . $this->_port;
}
return $authority;
}
public function setAuthority($authority)
{
$this->_userinfo = false;
$this->_host = false;
$this->_port = false;
if ('' === $authority) {
$this->_host = $authority;
return $this;
}
if (!preg_match('(^(([^@]*)@)?(.+?)(:(\d*))?$)', $authority, $matches)) {
return $this;
}
if ($matches[1]) {
$this->_userinfo = $this->_encodeData($matches[2]);
}
$this->_host = $matches[3];
if (isset($matches[5]) && strlen($matches[5])) {
$this->_port = $matches[5];
}
return $this;
}
public function getPath()
{
return $this->_path;
}
public function setPath($path)
{
$this->_path = $path;
return $this;
}
public function getQuery()
{
return $this->_query;
}
public function setQuery($query)
{
$this->_query = $query;
return $this;
}
public function getFragment()
{
return $this->_fragment;
}
public function setFragment($fragment)
{
$this->_fragment = $fragment;
return $this;
}
public function getQueryVariables()
{
$separator = $this->getOption(self::OPTION_SEPARATOR_INPUT);
$encodeKeys = $this->getOption(self::OPTION_ENCODE_KEYS);
$useBrackets = $this->getOption(self::OPTION_USE_BRACKETS);
$return = array();
for ($part = strtok($this->_query, $separator);
strlen($part);
$part = strtok($separator)
) {
list($key, $value) = explode('=', $part, 2) + array(1 => '');
if ($encodeKeys) {
$key = rawurldecode($key);
}
$value = rawurldecode($value);
if ($useBrackets) {
$return = $this->_queryArrayByKey($key, $value, $return);
} else {
if (isset($return[$key])) {
$return[$key] = (array) $return[$key];
$return[$key][] = $value;
} else {
$return[$key] = $value;
}
}
}
return $return;
}
/**
* Parse a single query key=value pair into an existing php array
*
* @param string $key query-key
* @param string $value query-value
* @param array $array of existing query variables (if any)
*
* @return mixed
*/
private function _queryArrayByKey($key, $value, array $array = array())
{
if (!strlen($key)) {
return $array;
}
$offset = $this->_queryKeyBracketOffset($key);
if ($offset === false) {
$name = $key;
} else {
$name = substr($key, 0, $offset);
}
if (!strlen($name)) {
return $array;
}
if (!$offset) {
// named value
$array[$name] = $value;
} else {
// array
$brackets = substr($key, $offset);
if (!isset($array[$name])) {
$array[$name] = null;
}
$array[$name] = $this->_queryArrayByBrackets(
$brackets, $value, $array[$name]
);
}
return $array;
}
private function _queryArrayByBrackets($buffer, $value, array $array = null)
{
$entry = &$array;
for ($iteration = 0; strlen($buffer); $iteration++) {
$open = $this->_queryKeyBracketOffset($buffer);
if ($open !== 0) {
// Opening bracket [ must exist at offset 0, if not, there is
// no bracket to parse and the value dropped.
// if this happens in the first iteration, this is flawed, see
// as well the second exception below.
if ($iteration) {
break;
}
// @codeCoverageIgnoreStart
throw new Exception(
'Net_URL2 Internal Error: '. __METHOD__ .'(): ' .
'Opening bracket [ must exist at offset 0'
);
// @codeCoverageIgnoreEnd
}
$close = strpos($buffer, ']', 1);
if (!$close) {
// this error condition should never be reached as this is a
// private method and bracket pairs are checked beforehand.
// See as well the first exception for the opening bracket.
// @codeCoverageIgnoreStart
throw new Exception(
'Net_URL2 Internal Error: '. __METHOD__ .'(): ' .
'Closing bracket ] must exist, not found'
);
// @codeCoverageIgnoreEnd
}
$index = substr($buffer, 1, $close - 1);
if (strlen($index)) {
$entry = &$entry[$index];
} else {
if (!is_array($entry)) {
$entry = array();
}
$entry[] = &$new;
$entry = &$new;
unset($new);
}
$buffer = substr($buffer, $close + 1);
}
$entry = $value;
return $array;
}
private function _queryKeyBracketOffset($key)
{
if (false !== $open = strpos($key, '[')
and false === strpos($key, ']', $open + 1)
) {
$open = false;
}
return $open;
}
public function setQueryVariables(array $array)
{
if (!$array) {
$this->_query = false;
} else {
$this->_query = $this->buildQuery(
$array,
$this->getOption(self::OPTION_SEPARATOR_OUTPUT)
);
}
return $this;
}
public function setQueryVariable($name, $value)
{
$array = $this->getQueryVariables();
$array[$name] = $value;
$this->setQueryVariables($array);
return $this;
}
public function unsetQueryVariable($name)
{
$array = $this->getQueryVariables();
unset($array[$name]);
$this->setQueryVariables($array);
}
public function getURL()
{
// See RFC 3986, section 5.3
$url = '';
if ($this->_scheme !== false) {
$url .= $this->_scheme . ':';
}
$authority = $this->getAuthority();
if ($authority === false && strtolower($this->_scheme) === 'file') {
$authority = '';
}
$url .= $this->_buildAuthorityAndPath($authority, $this->_path);
if ($this->_query !== false) {
$url .= '?' . $this->_query;
}
if ($this->_fragment !== false) {
$url .= '#' . $this->_fragment;
}
return $url;
}
private function _buildAuthorityAndPath($authority, $path)
{
if ($authority === false) {
return $path;
}
$terminator = ($path !== '' && $path[0] !== '/') ? '/' : '';
return '//' . $authority . $terminator . $path;
}
public function __toString()
{
return $this->getURL();
}
public function getNormalizedURL()
{
$url = clone $this;
$url->normalize();
return $url->getURL();
}
public function normalize()
{
// See RFC 3986, section 6
// Scheme is case-insensitive
if ($this->_scheme) {
$this->_scheme = strtolower($this->_scheme);
}
// Hostname is case-insensitive
if ($this->_host) {
$this->_host = strtolower($this->_host);
}
// Remove default port number for known schemes (RFC 3986, section 6.2.3)
if ('' === $this->_port
|| $this->_port
&& $this->_scheme
&& $this->_port == getservbyname($this->_scheme, 'tcp')
) {
$this->_port = false;
}
// Normalize case of %XX percentage-encodings (RFC 3986, section 6.2.2.1)
// Normalize percentage-encoded unreserved characters (section 6.2.2.2)
$fields = array(&$this->_userinfo, &$this->_host, &$this->_path,
&$this->_query, &$this->_fragment);
foreach ($fields as &$field) {
if ($field !== false) {
$field = $this->_normalize("$field");
}
}
unset($field);
// Path segment normalization (RFC 3986, section 6.2.2.3)
$this->_path = self::removeDotSegments($this->_path);
// Scheme based normalization (RFC 3986, section 6.2.3)
if (false !== $this->_host && '' === $this->_path) {
$this->_path = '/';
}
// path should start with '/' if there is authority (section 3.3.)
if (strlen($this->getAuthority())
&& strlen($this->_path)
&& $this->_path[0] !== '/'
) {
$this->_path = '/' . $this->_path;
}
}
private function _normalize($mixed)
{
return preg_replace_callback(
'((?:%[0-9a-fA-Z]{2})+)', array($this, '_normalizeCallback'),
$mixed
);
}
private function _normalizeCallback($matches)
{
return self::urlencode(urldecode($matches[0]));
}
public function isAbsolute()
{
return (bool) $this->_scheme;
}
public function resolve($reference)
{
if (!$reference instanceof Net_URL2) {
$reference = new self($reference);
}
if (!$reference->_isFragmentOnly() && !$this->isAbsolute()) {
throw new Exception(
'Base-URL must be absolute if reference is not fragment-only'
);
}
// A non-strict parser may ignore a scheme in the reference if it is
// identical to the base URI's scheme.
if (!$this->getOption(self::OPTION_STRICT)
&& $reference->_scheme == $this->_scheme
) {
$reference->_scheme = false;
}
$target = new self('');
if ($reference->_scheme !== false) {
$target->_scheme = $reference->_scheme;
$target->setAuthority($reference->getAuthority());
$target->_path = self::removeDotSegments($reference->_path);
$target->_query = $reference->_query;
} else {
$authority = $reference->getAuthority();
if ($authority !== false) {
$target->setAuthority($authority);
$target->_path = self::removeDotSegments($reference->_path);
$target->_query = $reference->_query;
} else {
if ($reference->_path == '') {
$target->_path = $this->_path;
if ($reference->_query !== false) {
$target->_query = $reference->_query;
} else {
$target->_query = $this->_query;
}
} else {
if (substr($reference->_path, 0, 1) == '/') {
$target->_path = self::removeDotSegments($reference->_path);
} else {
// Merge paths (RFC 3986, section 5.2.3)
if ($this->_host !== false && $this->_path == '') {
$target->_path = '/' . $reference->_path;
} else {
$i = strrpos($this->_path, '/');
if ($i !== false) {
$target->_path = substr($this->_path, 0, $i + 1);
}
$target->_path .= $reference->_path;
}
$target->_path = self::removeDotSegments($target->_path);
}
$target->_query = $reference->_query;
}
$target->setAuthority($this->getAuthority());
}
$target->_scheme = $this->_scheme;
}
$target->_fragment = $reference->_fragment;
return $target;
}
private function _isFragmentOnly()
{
return (
$this->_fragment !== false
&& $this->_query === false
&& $this->_path === ''
&& $this->_port === false
&& $this->_host === false
&& $this->_userinfo === false
&& $this->_scheme === false
);
}
public static function removeDotSegments($path)
{
$path = (string) $path;
$output = '';
// Make sure not to be trapped in an infinite loop due to a bug in this
// method
$loopLimit = 256;
$j = 0;
while ('' !== $path && $j++ < $loopLimit) {
if (substr($path, 0, 2) === './') {
// Step 2.A
$path = substr($path, 2);
} elseif (substr($path, 0, 3) === '../') {
// Step 2.A
$path = substr($path, 3);
} elseif (substr($path, 0, 3) === '/./' || $path === '/.') {
// Step 2.B
$path = '/' . substr($path, 3);
} elseif (substr($path, 0, 4) === '/../' || $path === '/..') {
// Step 2.C
$path = '/' . substr($path, 4);
$i = strrpos($output, '/');
$output = $i === false ? '' : substr($output, 0, $i);
} elseif ($path === '.' || $path === '..') {
// Step 2.D
$path = '';
} else {
// Step 2.E
$i = strpos($path, '/', $path[0] === '/');
if ($i === false) {
$output .= $path;
$path = '';
break;
}
$output .= substr($path, 0, $i);
$path = substr($path, $i);
}
}
if ($path !== '') {
$message = sprintf(
'Unable to remove dot segments; hit loop limit %d (left: %s)',
$j, var_export($path, true)
);
trigger_error($message, E_USER_WARNING);
}
return $output;
}
public static function urlencode($string)
{
$encoded = rawurlencode($string);
// This is only necessary in PHP < 5.3.
$encoded = str_replace('%7E', '~', $encoded);
return $encoded;
}
public static function getCanonical()
{
if (!isset($_SERVER['REQUEST_METHOD'])) {
// ALERT - no current URL
throw new Exception('Script was not called through a webserver');
}
// Begin with a relative URL
$url = new self($_SERVER['PHP_SELF']);
$url->_scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
$url->_host = $_SERVER['SERVER_NAME'];
$port = $_SERVER['SERVER_PORT'];
if ($url->_scheme == 'http' && $port != 80
|| $url->_scheme == 'https' && $port != 443
) {
$url->_port = $port;
}
return $url;
}
/**
* Returns the URL used to retrieve the current request.
*
* @return string
*/
public static function getRequestedURL()
{
return self::getRequested()->getUrl();
}
/**
* Returns a Net_URL2 instance representing the URL used to retrieve the
* current request.
*
* @throws Exception
* @return $this
*/
public static function getRequested()
{
if (!isset($_SERVER['REQUEST_METHOD'])) {
// ALERT - no current URL
throw new Exception('Script was not called through a webserver');
}
// Begin with a relative URL
$url = new self($_SERVER['REQUEST_URI']);
$url->_scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
// Set host and possibly port
$url->setAuthority($_SERVER['HTTP_HOST']);
return $url;
}
/**
* Returns the value of the specified option.
*
* @param string $optionName The name of the option to retrieve
*
* @return mixed
*/
public function getOption($optionName)
{
return isset($this->_options[$optionName])
? $this->_options[$optionName] : false;
}
/**
* A simple version of http_build_query in userland. The encoded string is
* percentage encoded according to RFC 3986.
*
* @param array $data An array, which has to be converted into
* QUERY_STRING. Anything is possible.
* @param string $separator Separator {@link self::OPTION_SEPARATOR_OUTPUT}
* @param string $key For stacked values (arrays in an array).
*
* @return string
*/
protected function buildQuery(array $data, $separator, $key = null)
{
$query = array();
$drop_names = (
$this->_options[self::OPTION_DROP_SEQUENCE] === true
&& array_keys($data) === array_keys(array_values($data))
);
foreach ($data as $name => $value) {
if ($this->getOption(self::OPTION_ENCODE_KEYS) === true) {
$name = rawurlencode($name);
}
if ($key !== null) {
if ($this->getOption(self::OPTION_USE_BRACKETS) === true) {
$drop_names && $name = '';
$name = $key . '[' . $name . ']';
} else {
$name = $key;
}
}
if (is_array($value)) {
$query[] = $this->buildQuery($value, $separator, $name);
} else {
$query[] = $name . '=' . rawurlencode($value);
}
}
return implode($separator, $query);
}
/**
* This method uses a regex to parse the url into the designated parts.
*
* @param string $url URL
*
* @return void
* @uses self::$_scheme, self::setAuthority(), self::$_path, self::$_query,
* self::$_fragment
* @see __construct
*/
protected function parseUrl($url)
{
// The regular expression is copied verbatim from RFC 3986, appendix B.
// The expression does not validate the URL but matches any string.
preg_match(
'(^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?)',
$url, $matches
);
// "path" is always present (possibly as an empty string); the rest
// are optional.
$this->_scheme = !empty($matches[1]) ? $matches[2] : false;
$this->setAuthority(!empty($matches[3]) ? $matches[4] : false);
$this->_path = $this->_encodeData($matches[5]);
$this->_query = !empty($matches[6])
? $this->_encodeData($matches[7])
: false
;
$this->_fragment = !empty($matches[8]) ? $matches[9] : false;
}
/**
* Encode characters that might have been forgotten to encode when passing
* in an URL. Applied onto Userinfo, Path and Query.
*
* @param string $url URL
*
* @return string
* @see parseUrl
* @see setAuthority
* @link https://pear.php.net/bugs/bug.php?id=20425
*/
private function _encodeData($url)
{
return preg_replace_callback(
'([\x-\x20\x22\x3C\x3E\x7F-\xFF]+)',
array($this, '_encodeCallback'), $url
);
}
/**
* callback for encoding character data
*
* @param array $matches Matches
*
* @return string
* @see _encodeData
* @SuppressWarnings(PHPMD.UnusedPrivateMethod)
*/
private function _encodeCallback(array $matches)
{
return rawurlencode($matches[0]);
}
}
To run **sample.php** file:
<?php
require_once 'HTTP/Request2.php';
$request = new Http_Request2('https://api.projectoxford.ai/vision/v1.0/ocr');
$url = $request->getUrl();
$request->setConfig(array(
'ssl_verify_peer' => FALSE,
'ssl_verify_host' => FALSE
));
$headers = array(
'Content-Type' => 'application/json',
'Ocp-Apim-Subscription-Key' => '08b2055a83fc4a48af161df7ef13f80f',
);
$request->setHeader($headers);
$parameters = array(
'language' => 'unk',
'detectOrientation ' => 'true',
);
$url->setQueryVariables($parameters);
$request->setMethod(HTTP_Request2::METHOD_POST);
$request->setBody("{'Url':'http://wp.streetwise.co/wp-content/blogs.dir/2/files/2014/07/dc-drivers-license-630x407.jpg'}");
try
{
$response = $request->send();
$rs1 = (string) $response->getBody();
$decode[] = json_decode($rs1, true);
$reg = $decode[0]["regions"];
for($i=0;$i<count($reg);$i++) {
$cnt = count($reg[$i]["lines"]);
for($l=0;$l<$cnt;$l++) {
for($m=0;$m<count($reg[$i]["lines"][$l]["words"]);$m++){
foreach($reg[$i]["lines"][$l]["words"] as $text) {
echo $text["text"]."<br/>";
}
}
}
}
}
catch (HttpException $ex)
{
echo $ex;
}
?>
来源：https://stackoverflow.com/questions/39127736/how-to-use-the-ocr-tesseractocr-php-library