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AssigneeSmart Engines Service, LLC
InventorsIuliia Aleksandrovna Shemiakina, Elena Evgenyevna Limonova, Natalya Sergeevna Skoryukina, Vladimir Viktorovich Arlazarov, Dmitry Petrovich Nikolaev
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Image quality assessment for text recognition in images with projectively distorted text fields. A projective transformation is calculated from a restored rectangle, representing a restored text field, to a source quadrangle, representing a projectively distorted text field in a source image. An approximation of a curve of a minimal scaling coefficient level on a plane corresponding to the restored rectangle is constructed, based on calculations of a discriminant of the curve. When the approximation intersects a representation of the restored rectangle, a restoration of the source image is determined to have insufficient image quality for reliable text recognition. When the approximation does not intersect the representation of the restored rectangle, a minimal scaling coefficient is calculated at a point inside the restored rectangle, and a determination of whether or not the restoration of the source image has sufficient image quality is made based on the minimal scaling coefficient.
A method comprising
A system comprising:
A non-transitory computer-readable medium having instructed stored thereon, wherein the instructions, when executed by a processor, cause the processor to, for each of one or more previously captured source images:
Dependencies are inferred from the claim text.