IMAGE PROCESSING DEVICE, CHARACTER RECOGNITION DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM

IMAGE PROCESSING DEVICE, CHARACTER RECOGNITION DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM

An image processing device for performing a preprocessing of an image recognition process to an input image is provided, which includes: a generation element for generating a histogram of luminance values of the input image; a determination element for determining a reference value for the luminance...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HYUGA, Tadashi, AIZAWA, Tomoyoshi, HAMABASHIRI, Hideto
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
COMPUTING
COUNTING
PHYSICS
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Beschreibung
Zusammenfassung:An image processing device for performing a preprocessing of an image recognition process to an input image is provided, which includes: a generation element for generating a histogram of luminance values of the input image; a determination element for determining a reference value for the luminance values on the basis of the histogram, and determining a high luminance pixel that is a pixel having a luminance value greater than the reference value; and a conversion element for converting the luminance value of the high luminance pixel into a luminance value that is lower than or equal to the reference value. Thus, even when a high luminance region is present in the input image due to specularly reflected light or the like, high-accuracy character recognition can be performed.