Method and apparatus for automatic recognition of image and text area on a master
Номер патента: CA1155551A
Опубликовано: 18-10-1983
Автор(ы): Friedrich Wahl, Hermann Fuchsberger, Ludwig Abele, Wolfgang Scherl
Принадлежит: SIEMENS AG
Опубликовано: 18-10-1983
Автор(ы): Friedrich Wahl, Hermann Fuchsberger, Ludwig Abele, Wolfgang Scherl
Принадлежит: SIEMENS AG
Реферат: ABSTRACT OF THE DISCLOSURE An apparatus and method for automatic recognition of image and text/graphics areas on a master undertake an opto-electronic scanning of the master with analog values obtained by the scanning being sampled and converted into digital information which is stored in a data field which is divided into a number of windows having edge lengths selected to be greater than the spacing between two successive lines of text. A grayscale value histogram is generated for each window and is statistically analyzed for determining whether the area of the master represented by the window is predominantly a text/graphics area or an image area based on known statistical character-istics generally related to each type of area.
Method and apparatus for compensating illumination variations in a sequence of images
Номер патента: EP2898682A1. Автор: Franck Hiron,Yannick Olivier,Philippe Bordes,David Touze. Владелец: Thomson Licensing SAS. Дата публикации: 2015-07-29.