Be default elDoc IDP assumes that input files (images) are provided with average or good scanning quality, as such they are pre-processed with the default settings optimized for processing images of the average quality.

elDoc IDP also allows to process images provided with poor and bad quality (noisy background or color background, twisted and rotated photos of documents, etc.), but such scanned documents may require custom preprocessing settings. For this purpose elDoc IDP provides possibility to define custom parameters per RecoForm so when documents are to be processed with the given RecoForm they are at first place re-pre-processed with custom settings and only after that - IDP will be performed.

This page provides overview of the available advanced settings.

Recognition Form Advanced Settings

Advanced settings are set via the Advanced settings configuration area of the RecoForm.

Advanced settings description

Advanced setting param name	Data type	Default value	Description	Triggers custom pre-processing*
idp_recoform_table_ancundtblusebottom	Boolean	false	Use bottom left point of anchor for calculating location of table end
idp_recoform_use_source	Boolean	false	Switches RecoForm to use source image instead of the pre-processed image for the RecoForm processing
idp_recoform_custom_id	String		Id of the custom RecoForm which is loaded as plugin
idp_recoform_morphology	String		Enables artifacts removal and sets size of the artifact to be removed during image pre-processing Min value: "0x0" (disabled) Max value: "99x99"
idp_adaptive_threshold	Boolean	false	Enables adaptive threshold
idp_iterative_threshold	Boolean	false	Enables iterative threshold
idp_threshold_value	Integer		Defines custom thresholding value. When set to 0 - processing of this property will be ignored Min value: 0 (disabled) Max value: 255
idp_resolution_threshold	String		If source image resolution is below defined threshold in at least one dimension document will be sent to validation Min value: "10x10" Max value: "99999x99999"
idp_ocr_mode_sparse_text	Boolean	false	Sets OCR recognition mode to Sparse Text (Find as much text as possible in no particular order)
idp_recoform_strict_layout	Boolean	false	Enforces strict template layout for the RecoForm. When this value set to true anchors' positions are used for calculating page scale
idp_ignore_text_layer	Boolean	false	Instructs system to ignore text-layer (if any available, relevant to the PDF files) and enforces document OCR
idp_recoform_keywords_classification	Boolean	false	Enables document classification based on the RecoForm keywords
idp_recoform_table_disable_row_merge	Boolean	false	Disables table rows merge
idp_recoform_table_enable_columns_detection	Boolean	false	Enables table columns width detection based on column border vertical lines (applicable for scan-images only)

• - "Triggers custom pre-processing" explanation:
  System performs documents pre-processing on upload using most common pre-processing parameters. Due to specifics of some documents - generic parameters may not work best for such files, as such advanced settings are required to be defined on the RecoForms for such documents. Processing documents using such short-listed RecoForms with advanced settings marked with "triggers custom pre-processing" - causes system to perform pre-processing of the given document from scratch again, what may affect time required for the whole recognition queue processing.

Switch button "Force files preprocessing by elDoc" on the documents upload (Recognition queue) page enables the following advanced settings to be applied for document pre-processing: idp_ocr_mode_sparse_text, idp_iterative_threshold, idp_ignore_text_layer