Image processor which converts image with poor resolution into image with improved resolution
Patent 5231519 Issued on July 27, 1993. Estimated Expiration Date: 
October 15, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 15, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLow resolution raster images Apparatus for detecting two-dimensional pattern and method for transforming the pattern into binary image Facsimile transceiver equipped with broadcasting feature Image processing apparatus with high- and low-resolution image sensors and an edge detector Patent #: 4782399 InventorAssigneeApplicationNo. 775537 filed on 10/15/1991US Classes:358/3.07, Rescreening (e.g., converting spatial resolution)348/441, FORMAT CONVERSION358/445Signal sampling and conversionExaminersPrimary: Coles, Sr., Edward L.Assistant: Vu, Hien Attorney, Agent or FirmInternational ClassH04N 001/40Foreign Application Priority Data1990-11-20 JPAbstractAn image processor converts a resolution of an image from an inferior resolution to a superior resolution and performs an smoothing process for smoothing jagged edges of an image by using a 3*3 pixel matrix. The center of the 3*3 pixel matrix is a target pixel which is to be converted from the inferior resolution to the superior resolution. The image processor according to the present invention may use a first row of the 3*3 pixel matrix which has been converted into the superior resolution, so that the target pixel can be converted more accurately. In addition, the image processor may use four color patterns of the 3*3 pixel matrix so that the jagged edge of the image can be smoothed in a horizontal direction. Moreover, the image processor may use different color patterns of the 3*3 pixel matrix when the image processor converts the resolution of the image from the inferior resolution to an intermediate resolution and then converts the resolution of the image from the intermediate resolution to the superior resolution, so that errors caused by the conversion never accumulate.Field of SearchSignal sampling and conversion | |
