High speed optical code reading
AssigneeOptoelectronics Co., Ltd.
InventorsYuri Kishimoto, Shiping Liu
Life of this patent
Estimating the term…
Abstract
In an optical code reader, at least a selected one of AGC processing and automatic focus control is performed in parallel with optical code decoding. Preferably, the selected process is initiated ahead of any signal which initiates decoding. Preferably, the selected process is performed periodically and independently of any signal which initiates decoding. In an embodiment, decoding and the selected processes are performed by different first and second processors, respectively, which operate in parallel, and the second processor performs the selected process without the first processor exercising any control over the performance of the selected process.
Claims32
In an optical code reader which receives, over a range of distances, optical information with a range of optical quality defining an image of a remote optical code, the reader decoding the optical information to recover an image of the optical code and to extract from the image information contained in the optical code, the reader performing automatic gain control (AGC) processing on the optical information to compensate for optical quality variation, the reader performing automatic focus control of a variable focus device to compensate for variation in the distance of the optical code from the optical code reader, a method for operating the optical code reader, comprising performing at least a selected process corresponding to one of AGC processing and automatic focus control in parallel with decoding.
In an optical code reader which receives, over a range of distances, optical information with a range of optical quality defining an image of a remote optical code, the reader decoding the optical information to recover an image of the optical code and to extract from the image information contained in the optical code, the reader performing automatic gain control (AGC) processing on the optical information to compensate for optical quality variation, the reader performing automatic focus control of a variable focus device to compensate for variation in the distance of the optical code from the optical code reader, the improvement comprising a control processor performing at least a selected process corresponding to one of AGC processing and automatic focus control in parallel with optical code decoding.
Dependencies are inferred from the claim text.