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:
Oct. 08, 1991
Filed:
Nov. 06, 1989
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A text image data compression system for compressing image data having pixels each being expressed by N bit data which varies from a maximum value to a minimum value, includes a circuit for replacing the maximum value N bit data with a first symbol '3' followed by N-1 bit common data '*' and the minimum value N bit data with a second symbol '2' followed by N-1 bit common data '*'. Also provided is a circuit for making a symbol alignment such that the most significant symbols are collected and are aligned from the first row to the bottom row, the second significant symbols are collected and are aligned from the first row to the bottom row, kth significant symbols are collected and are aligned from the first row to the bottom row, in which k is between three and N-1, and the least significant symbols are collected and are aligned from the first row to the bottom row, and that all of said common symbols '*' are removed; and a circuit for detecting run lengths in the symbol alignment to produce run lengths of four different symbols '3', '2', '1' and '0'.