The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1994
Filed:
Feb. 06, 1992
Abraham Moolenaar, Venlo, NL;
Oce-Nederland B.V., Venlo, NL;
Abstract
In the coding of image data corresponding to a raster of pixel values, a generalized run length coding is used in respect of the difference between the pixel values in the raster line to be coded and the pixel values in the same position in the preceding raster line, such that with respect to multi-value pixels (gray values), the generalized run length coding comprises an approximation of the course of the differences as a function of the position in the raster line with a linear function and the code then contains the number of pixels and a characterization of the approximating function, and with respect to binary pixels (on/off), the length is simply a determination of the series of pixel values each equal to the pixel value in the same position in the preceding raster line, wherein in a particularly effective embodiment, this generalized run length coding with respect to the preceding line is combined with generalized run length coding of the pixel values within a line, both methods each being performed in parallel, and the method delivering the most effective code that is the longest series of pixels, compensated for by the length of the code itself, is selected for the actual encoding.