초록 ▼

A philatelic stamp grading invention includes image digitizing hardware for creating a two-dimensional array of data bytes corresponding to the digitized image of the stamp. A computer executes a program which analyzes the stamp image data and determines the minimum border width of each side of the

A philatelic stamp grading invention includes image digitizing hardware for creating a two-dimensional array of data bytes corresponding to the digitized image of the stamp. A computer executes a program which analyzes the stamp image data and determines the minimum border width of each side of the stamp between the edges of the stamp and the design or vignette of the stamp. A centering index is calculated from the minimum border values determined for each edge of the stamp. A printer is also shown providing means for printing the centering index, as well as printing out a hard copy of the computer analyzed stamp image.

대표청구항 ▼

A method for determining the centering condition of a vignette surrounded by a rectangular border having perforation markings at the outermost edges of said border, said method comprising the steps of: (a) digitizing an image of said vignette and said border to produce a pixel data file; (b) analyzi

A method for determining the centering condition of a vignette surrounded by a rectangular border having perforation markings at the outermost edges of said border, said method comprising the steps of: (a) digitizing an image of said vignette and said border to produce a pixel data file; (b) analyzing the pixel data file and determining four minimum pixel distances from the perforation markings to the vignette at the top, bottom, left side and right side of the vignette; (c) calculating a centering index for the image using the four minimum pixel distances; and (d) displaying said centering index.