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公开(公告)号：CA1103377A
公开(公告)日：1981-06-16
申请号：CA307336
申请日：1978-07-13
Applicant: IBM
Inventor： CASEY RICHARD G , LANGDON GLEN G JR , MANTEY PATRICK E , WILLIAMS ROBIN
Abstract: There is disclosed a method and means for increasing the positional accuracy of operator controlled cursors engaged in the digitized encoding of graphic information such as line drawings. The method steps comprise those of digitizing the instantaneous contact position between the cursor and the data entry surface as reference coordinates detecting any segment of a colored object upon the surface within a predetermined area about the cursor; ascertaining the location within the area of the centroid or the like of the detected segment; and digitizing said ascertained location as a displacement from the reference coordinates. Apparatus for practicing the method comprise an independently actuable cursor formed from a position encoder and an image scanner, the scanner generating a Boolean coded array of points counterpart to a preselected surface area The scanned array is first buffered and then used to actuate an operator viewable LED di-play of the scanned array on one hand and said array is sent to CPU on the other hand. In turn, the CPU calculates the coordinates of the centroid of that array area of contiguous points having the same de-lgnatod 8001ean Icolor) 0 or 1 value Signals representing tho calcul-ted coordlnate- generated by the CPU then cause the LED dlsplay ~o differentlally lndicate ths calculated centrold location to the operator such as by way of a fla-hlng di~play ele~ent
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公开(公告)号：FR2409554B1
公开(公告)日：1986-04-11
申请号：FR7830410
申请日：1978-10-19
Applicant: IBM
Inventor： CASEY RICHARD G , LANGDON GLEN G JR , MANTEY PATRICK E , WILLIAMS ROBIN
Abstract: There is disclosed a method and means for increasing the positional accuracy of operator controlled cursors engaged in the digitized encoding of graphic information such as line drawings. The method steps comprise those of digitizing the instantaneous contact position between the cursor and the data entry surface as reference coordinates; detecting any segment of a colored object upon the surface within a predetermined area about the cursor; ascertaining the location within the area of the centroid or the like of the detected segment; and digitizing said ascertained location as a displacement from the reference coordinates. Apparatus for practicing the method comprises an independently actuable cursor formed from a position encoder and an image scanner, the scanner generating a Boolean coded array of points counterpart to a preselected surface area. The scanned array is first buffered and then used to actuate an operator viewable LED display of the scanned array on one hand and said array is sent to a CPU on the other hand. In turn, the CPU calculates the coordinates of the centroid of that array area of contiguous points having the same designated Boolean (color) 0 or 1 value. Signals representing the calculated coordinates generated by the CPU then cause the LED display to differentially indicate the calculated centroid location to the operator such as by way of a flashing display element.
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公开(公告)号：CA1127332A
公开(公告)日：1982-07-06
申请号：CA339637
申请日：1979-11-13
Applicant: IBM
Inventor： LANGDON GLEN G JR , MANTEY PATRICK E
Abstract: A METHOD AND MEANS FOR ELECTROCHROMIC TEXTURE DISPLAY A method and means for creating the display illusion of "roughness" or "texture" in color patterns suitable for a raster scanned display surface by assigning different color values to pels (picture elements) in adjacent positions and then replicating the patterns automatically using the recurrent and sequential accessing of a concordance table. The real colour of each pel of a textured pattern is a joint function of a color number stored in a refresh buffer driving the display surface for any given display matrix array pel position and the value of a predetermined subset of address bits which describe that pel position. The use of preselected pel position address bits for regulating texture is shown as applied to video lookup tables and refresh buffers as a single level control and additionally to two or more video lookup tables for achieving a pattern hierarchy. SA9-78-045
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公开(公告)号：FR2409554A1
公开(公告)日：1979-06-15
申请号：FR7830410
申请日：1978-10-19
Applicant: IBM
Inventor： CASEY RICHARD G , LANGDON GLEN G JR , MANTEY PATRICK E , WILLIAMS ROBIN
Abstract: There is disclosed a method and means for increasing the positional accuracy of operator controlled cursors engaged in the digitized encoding of graphic information such as line drawings. The method steps comprise those of digitizing the instantaneous contact position between the cursor and the data entry surface as reference coordinates; detecting any segment of a colored object upon the surface within a predetermined area about the cursor; ascertaining the location within the area of the centroid or the like of the detected segment; and digitizing said ascertained location as a displacement from the reference coordinates. Apparatus for practicing the method comprises an independently actuable cursor formed from a position encoder and an image scanner, the scanner generating a Boolean coded array of points counterpart to a preselected surface area. The scanned array is first buffered and then used to actuate an operator viewable LED display of the scanned array on one hand and said array is sent to a CPU on the other hand. In turn, the CPU calculates the coordinates of the centroid of that array area of contiguous points having the same designated Boolean (color) 0 or 1 value. Signals representing the calculated coordinates generated by the CPU then cause the LED display to differentially indicate the calculated centroid location to the operator such as by way of a flashing display element.
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