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Update OCRTest to use the IRIS module #156

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Update OCRTest to use the IRIS module #156

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90 changes: 46 additions & 44 deletions Samples/OCRTest/PHP/OCRTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,9 @@

// The location of the OCR Module
PDFNet::AddResourceSearchPath("../../../Lib/");

// If the IRIS OCR module is available, will use that instead of the default
$use_iris = OCRModule::IsIRISModuleAvailable();
if(!OCRModule::IsModuleAvailable()) {
echo "Unable to run OCRTest: PDFTron SDK OCR module not available.\n
---------------------------------------------------------------\n
Expand All @@ -33,17 +36,22 @@
} else
{
//--------------------------------------------------------------------------------
// Example 1) Process image without specifying options, default language - English - is used


// Example 1) Process image
// A) Setup empty destination doc

$doc = new PDFDoc();

// B) Run OCR on the .png with options
// B) Use the IRIS OCR engine if available

OCRModule::ImageToPDF($doc, $input_path."psychomachia_excerpt.png", NULL);
$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}

// C) check the result
// C) Run OCR on the .png with options
OCRModule::ImageToPDF($doc, $input_path."psychomachia_excerpt.png", $opts);

// D) Check the result

$doc->Save($output_path."psychomachia_excerpt.pdf", 0);

Expand All @@ -60,6 +68,9 @@
// B) Setup options with multiple target languages, English will always be considered as secondary language

$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}
$opts->AddLang("deu");
$opts->AddLang("fra");
$opts->AddLang("eng");
Expand All @@ -85,6 +96,9 @@
// B) Setup options with a single language and an ignore zone

$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}
$opts->AddLang("deu");

$ignore_zones = new RectCollection();
Expand Down Expand Up @@ -112,6 +126,9 @@
// B) Setup options with a single language plus text/ignore zones

$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}
$opts->AddLang("eng");

$ignore_zones = new RectCollection();
Expand Down Expand Up @@ -160,17 +177,24 @@

$doc = new PDFDoc($input_path."zero_value_test_no_text.pdf");

// B) Run OCR on the .pdf with default English language
// B) Use the IRIS OCR engine if available

$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}

// C) Run OCR on the .pdf with default English language

$json = OCRModule::GetOCRJsonFromPDF($doc, NULL);
$json = OCRModule::GetOCRJsonFromPDF($doc, $opts);

// C) Post-processing step (whatever it might be)
// D) Post-processing step (whatever it might be)

echo "Have OCR result JSON, re-applying to PDF \n";

OCRModule::ApplyOCRJsonToPDF($doc, $json);

// D) check the result
// E) check the result

$doc->Save($output_path."zero_value_test_no_text.pdf", 0);

Expand All @@ -184,55 +208,33 @@

$doc = new PDFDoc();

// B) Run OCR on the .tif with default English language, extracting OCR results in XML format. Note that
// B) Use the IRIS OCR engine if available

$opts = new OCROptions();
if ($use_iris) {
$opts->SetOCREngine("iris");
}

// C) Run OCR on the .tif with default English language, extracting OCR results in XML format. Note that
// in the process we convert the source image into PDF. We reuse this PDF document later to add hidden text layer to it.

$xml = OCRModule::GetOCRXmlFromImage($doc, $input_path."physics.tif", NULL);
$xml = OCRModule::GetOCRXmlFromImage($doc, $input_path."physics.tif", $opts);

// C) Post-processing step (whatever it might be)
// D) Post-processing step (whatever it might be)

echo "Have OCR result XML, re-applying to PDF \n";

OCRModule::ApplyOCRXmlToPDF($doc, $xml);

// D) check the result
// E) check the result

$doc->Save($output_path."physics.pdf", 0);

echo "Example 6: extracting and applying OCR XML from physics.tif \n";

echo "Done. \n";


//--------------------------------------------------------------------------------
// Example 7) Resolution can be manually set, when DPI missing from metadata or is wrong

// A) Setup empty destination doc

$doc = new PDFDoc();

// B) Setup options with a text zone

$opts = new OCROptions();
$text_zones = new RectCollection();
$text_zones->AddRect(new Rect(140.0, 870.0, 310.0, 920.0));
$opts->AddTextZonesForPage($text_zones, 1);

// C) Manually override DPI

$opts->AddDPI(100);

// D) Run OCR on the .jpg with options

OCRModule::ImageToPDF($doc, $input_path."corrupted_dpi.jpg", $opts);

// E) check the result

$doc->Save($output_path."corrupted_dpi.pdf", 0);

echo "Example 7: converting image with corrupted resolution metadata corrupted_dpi.jpg to pdf with searchable text \n";

}

PDFNet::Terminate();

?>