16.3.1

📅 2026-03-27

New NuGet Packages

The iDRS™ toolkit now includes NuGet packages for all supported ARM platforms.

Refer to Developer Guide > Getting started > NuGet Distribution.

New Features

CDocumentProcessing

This version introduces the CDocumentProcessing class.
It is an all-in-one API that handles the entire document-processing workflow.

With a single call, it allows you to convert a series of input images into a set of any supported output formats.

It also manages multithreading for you, using an inter-page multithreading strategy to optimize processing time. Memory consumption is optimized as pages are discarded once they have been processed.

The class provides convenient methods to retrieve the document-processing result:

  • A callback function

  • A std::future object

  • An awaiter object (for C++20 and later) for use with co_await

This API is experimental. It is fully functional, but it can change in future versions of iDRS.

Improvements

High Quality OCR (HQOCR) for Chinese and Hebrew

This version adds support for Chinese Simplified, Chinese Traditional, and Hebrew in our High‑Quality OCR (HQOCR) engine. With these additions, HQOCR now covers all remaining languages in its roadmap. This enhancement delivers significant improvements in both accuracy and performance, especially on challenging documents such as low-resolution images, magazines, and newspapers.

.NET 8 support

Starting with this version, the idrsnet16.dll assembly is built against .NET 8. As a result, from this version onward, .NET 8 is the minimum required version to use the .NET API of the SDK.

Added/removed resources

Binaries removal

This version removes the following binaries from the package. If these files are still in your installation, you can safely delete them.

Windows Linux macOS

DLL files formerly in bin:

Shared libraries formerly in lib:

Dynamic libraries formerly in bin/iDRS16.framework/Resources:

idrsdmtxbarcodewrapper16.dll
idrsevoibarcodewrapper16.dll
idrsirisbarcodeextwrapper16.dll
idrsirisbarcodewrapper16.dll
idrsasian216.dll

libidrsdmtxbarcodewrapper16.so
libidrsevoibarcodewrapper16.so
libidrsirisbarcodeextwrapper16.so
libidrsirisbarcodewrapper16.so
libidrsasian216.so

libidrsdmtxbarcodewrapper16.dylib
libidrsevoibarcodewrapper16.dylib
libidrsirisbarcodeextwrapper16.dylib
libidrsirisbarcodewrapper16.dylib
libidrsasian216.dylib

OCR Resources file changes

Because this version replaces the OCR engine for Chinese and Hebrew, the following resource files are added or removed:

Resource file Status

chinese_generic_rnn_engine.bin

Added

net_schinese_rnn.bin

Added

net_tchinese_rnn_hori.bin

Added

net_tchinese_rnn_vert.bin

Added

hebrew_engine.bin

Added

net_hebrew.bin

Added

chinese.bin

Removed

chinese_bigrams.bin

Removed

chinese_features.bin

Removed

chinese_features_fast.bin

Removed

chinese_features_one_candidate.bin

Removed

chinese_font_features.bin

Removed

chinese_generic.bin

Removed

chinese_same_proba.bin

Removed

chinese_similar_characters_differentiation.bin

Removed

chinese_traditional.bin

Removed

chinese_traditional_bigrams.bin

Removed

chinese_traditional_features.bin

Removed

chinese_traditional_features_fast.bin

Removed

chinese_traditional_features_one_candidate.bin

Removed

chinese_traditional_font_features.bin

Removed

chinese_traditional_same_proba.bin

Removed

chinese_traditional_similar_characters_differentiation.bin

Removed

hebrew.ocr

Removed

Fixed bugs

Internal ID Description Service desk IDs

IDRSRD-5903

The DRS engine misses some text when the segmentation filters are switched off

IDRSRD-9867

iDRS does not properly detect the table on the attached image

IDRSRD-10063

[Regression] Pdf output should allow to put empty-string title, when universal access is disabled"

IDRSRD-10071

AnalyzePage() and RecognizeText() hanging when std::fesetround(FE_UPWARD) is set.

ISD-37489

IDRSRD-10087

Performing pdf compression without OCR

ISD-38280

IDRSRD-10104

The iDRS failed creating a DOCX on a specific image

IDRSRD-10110

iDRS setting TextDetectionSensivity.MaximumText does not grab enough test on a customer test image

IDRSRD-10111

IDRS_ERROR_CHARACTER_RECOGNITION_ENGINE_FAILURE on attached pdf

ISD-37695

IDRSRD-10120

The iDRS crashes when processing the attached document, in traditional Chinese"

ISD-36631

IDRSRD-10122

The speed and memory performance of CPageProcessing can be improved

IDRSRD-10123

The iDRS should allow better control of its internal threading configuration

ISD-34219

IDRSRD-10124

Speed performance of iDRS iHQC feature can be improved

IDRSRD-10129

Skew detection fails on small images

IDRSRD-10130

Memory consumption of iDRS iHQC feature can be improved

IDRSRD-10132

iDRS misses text from a Korean image

ISD-37746

IDRSRD-10148

"iDRS can overwrite existing file even if missing permissions, on Linux platform"

IDRSRD-10166

iDRS version 16.2.6+178 throws an exception when deskewing near-blank color images

IDRSRD-10172

PDFs created from greyscale images by iDRS 16.2.6+178 cannot be opened by Acrobat Reader

IDRSRD-10173

"Image skew is not corrected when using iDRS 16.2.6+178 CPageProcessing, if both language and orientation detection are not enabled"

IDRSRD-10175

The iDRS fails to run twice Chinese OCR with the same CPageProcessing instance

ISD-36631

IDRSRD-10187

Dimensions of generated PDF pages can be more precise

IDRSRD-10199

iDRS 16 doesn’t use custom image plugin for file loading

IDRSRD-10211

developer guide Aztec 2D barcode example image is actually PDF417

IDRSRD-10215

Regression - CDocument’s page collection is not notified on completion of output processing

IDRSRD-10218

iDRS crashes when trying to sign an existing document in MacOS