FIELD: physics.
SUBSTANCE: invention relates to methods of detecting text on halftone digital images and related methods of segmenting images based on presence of text. Method includes selecting adjacent frames of halftone images of a sequence of images, removing a constant component of image brightness of selected frames, double spatial horizontal differentiation, correlation processing of an image with a reference, calculation of threshold value, comparison of results of correlation processing with threshold and condition of detection of text forms determination of their parameters.
EFFECT: high accuracy of detecting text forms on images containing a composite background.
1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DETECTING TEXT IN BITMAP IMAGE (VERSIONS) AND METHOD OF DETECTING SPAM, CONTAINING BITMAP IMAGES | 2007 |
|
RU2363047C1 |
| METHOD AND SYSTEM FOR CONVERTING SCREENSHOT INTO METAFILE | 2013 |
|
RU2534005C2 |
| METHOD FOR AUTOMATIC RECOGNITION OF OBJECTS ON IMAGE | 2013 |
|
RU2528140C1 |
| METHOD OF DETECTING SPAM IN BITMAP IMAGE | 2011 |
|
RU2453919C1 |
| METHOD AND SYSTEM OF PREPARING TEXT-CONTAINING IMAGES TO OPTICAL RECOGNITION OF SYMBOLS | 2016 |
|
RU2636097C1 |
| METHOD FOR NOISE-IMMUNE GRADIENT SELECTION OF OBJECT CONTOURS ON DIGITAL HALFTONE IMAGES | 2018 |
|
RU2695417C1 |
| METHOD AND SYSTEM OF PREPARING TEXT-CONTAINING IMAGES TO OPTICAL RECOGNITION OF SYMBOLS | 2016 |
|
RU2628266C1 |
| METHOD FOR RECOGNITION OF TEXT IN IMAGES OF DOCUMENTS | 2021 |
|
RU2768544C1 |
| METHOD, SYSTEM, DIGITAL STILL CAMERA AND APPLICATION-SPECIFIC INTEGRATED CIRCUIT (ASIC), PROVIDING IMAGE GEOMETRIC TRANSFORMATION BASED ON TEXT LINE SEARCH | 2006 |
|
RU2412482C2 |
| METHOD AND SYSTEM OF TEXT IMPROVEMENT AT DIGITAL COPYING OF PRINTED DOCUMENTS | 2012 |
|
RU2520407C1 |
