Declaration
TIEVisionOCRPageSegmentationMode = (ievOCROSD_Only = 0, // Orientation and script detection (OSD) only (NO OCR)
ievOCRAuto_OSD = 1, // Automatic page segmentation with OSD
ievOCRAuto_OnlySegmenting = 2, // Automatic page segmentation, but no OSD or OCR
ievOCRAuto = 3, // Fully automatic page segmentation, but no OSD (Default)
ievOCRSingle_Column = 4, // Assume a single column of text of variable sizes
ievOCRSingle_Block_Vert_Text = 5, // Assume a single uniform block of vertically aligned text
ievOCRSingle_Block = 6, // Assume a single uniform block of text
ievOCRSingle_Line = 7, // Treat the image as a single text line
ievOCRSingle_Word = 8, // Treat the image as a single word
ievOCRCircle_Word = 9, // Treat the image as a single word in a circle
ievOCRSingle_Char = 10, // Treat the image as a single character
ievOCRSparseText = 11, // Find as much text as possible in no particular order
ievOCRSparseText_OSD = 12, // Sparse text with OSD
ievOCRRawLine = 13 // Raw line. Treat the image as a single raw text line
);
Description
| Const | Description | OCR | Auto-Orient | Page Segmentation | OSD |
|---|---|---|---|---|---|
| ievOCROSD_Only (0) | Orientation and script detection (OSD) only (NO OCR) |  |  | ||
| ievOCRAuto_OSD (1) | Automatic page segmentation with OSD | | | | |
| ievOCRAuto_OnlySegmenting (2) | Automatic page segmentation, but no OSD or OCR | | | | |
| ievOCRAuto (3) | Fully automatic page segmentation, but no OSD (Default) | | | | |
| ievOCRSingle_Column (4) | Assume a single column of text of variable sizes | | | | |
| ievOCRSingle_Block_Vert_Text (5) | Assume a single uniform block of vertically aligned text | | | | |
| ievOCRSingle_Block (6) | Assume a single uniform block of text | | | | |
| ievOCRSingle_Line (7) | Treat the image as a single text line | | | ||
| ievOCRSingle_Word (8) | Treat the image as a single word | | | ||
| ievOCRCircle_Word (9) | Treat the image as a single word in a circle | | | ||
| ievOCRSingle_Char (10) | Treat the image as a single character | | | ||
| ievOCRSparseText (11) | Find as much text as possible in no particular order | | | ||
| ievOCRSparseText_OSD (12) | Sparse text with OSD | | | ||
| ievOCRRawLine (13) | Raw line. Treat the image as a single raw text line | | |
Auto-Orient: Supports documents even when oriented incorrectly (e.g. sideways). Also used for getOrientation
Page Segmentation: Supports documents even if they have multiple columns of text
OSD: Analyzes the document to determine how the page is oriented (0, 90, 270 or 180 deg.) and the confidence of the script (e.g. Latin, Han Chinese, Cyrillic, etc).
Note:
◼ All OSD options require the file "osd.traineddata" for all languages (located in the language path passed with createOCR). If "osd.traineddata" is not available then orientation detection is not possible (e.g. upside-down pages will process incorrectly).
◼ For Orientation detection ievOCRAuto_OSD should be used
◼ For Region detection ievOCRAuto_OnlySegmenting or ievOCRAuto should be used