Image processing method and contactless image input apparatus utilizing the method
An image processing method, a contactless image processing apparatus, and a storage medium which stores processes. The method includes the steps of reading an original by a graphics input unit in a contactless manner and outputting from the graphics input unit information as to the original, measuring a distance from the graphics input unit to the original at least on the basis of information as to vertexes which is derived from the information as to the original which has been read and outputted from the graphics input unit and correcting for the information as to the original outputted from the graphics input unit on the basis of the distance which is measured and the information as to the vertexes.
1 . An image processing method comprising the steps of:
reading an original by a graphics input means in a contactless manner and outputting from the graphics input means information as to the original;
measuring a distance from the graphics input means to the original at least on the basis of information as to vertexes which is derived from the information as to the original which has been read and outputted from the graphics input means; and
correcting for the information as to the original outputted from the graphics input means on the basis of the distance which is measured and the information as to the vertexes.
2 . A method according to claim 1 , wherein the information as to the vertexes is derived on the basis of outline information extracted from the information as to the original which has been read outputted from the graphics input means so that the distance measurement is effected without utilization of a separate distance sensor.
3 . A method according to claim 1 , wherein
the correction of the information as to the original is a correction to develop the information as to the original which is read into a plane, and
the information as to the vertexes is vertex information of a patch for forming pixels by an interpolation of each patch at the time of the correction.
4 . A method according to claim 2 , wherein
the correction of the information as to the original is a correction to develop the information as to the original which is read into a plane, and
the information as to the vertexes is vertex information of a patch for forming pixels by an interpolation of each patch at the time of the correction.
5 . A method according to claim 1 , wherein an iterative convergence calculation is performed when the distance from the graphics input means to the original is measured.
6 . A method according to claim 2 , wherein an iterative convergence calculation is performed when the distance from the graphics input means to the original is measured.
7 . A method according to claim 3 , wherein an iterative convergence calculation is performed when the distance from the graphics input means to the original is measured.
8 . A method according to claim 4 , wherein an iterative convergence calculation is performed when the distance from the graphics input means to the original is measured.
9 . A method according to claim 5 , wherein an initial value of the iterative convergence calculation is inputted.
10 . A method according to claim 6 , wherein an initial value of the iterative convergence calculation is inputted.
11 . A method according to claim 7 , wherein an initial value of the iterative convergence calculation is inputted.
12 . A method according to claim 8 , wherein an initial value of the iterative convergence calculation is inputted.
13 . A storage medium which stores processes, wherein the processes comprise the steps of:
receiving information as to an original which is read by a graphics input means in a contactless manner and outputted therefrom;
measuring a distance from the graphics input means to the original at least on the basis of information as to vertexes which is derived from the information as to the original which has been read and outputted from the graphics input means; and
correcting for the information as to the original outputted from the graphics input means on the basis of the distance which is measured and the information as to the vertexes and outputting a correction result.
14 . A contactless image input apparatus comprising:
graphics input means for reading an original put on a copyboard in a contactless manner and outputting information as to the original to a processor;
wherein the processor includes:
distance measuring means for measuring a distance from said graphics input means to said original at least on the basis of information as to vertexes derived from the information as to said original which has been read and outputted from said input means graphics; and
correcting means for correcting said information as to said original on the basis of the distance which is measured by said distance measuring means and the information as to the vertexes.
15 . An apparatus according to claim 14 , further comprising:
outline extracting means for extracting an outline of said original from said information as to said original outputted from said graphics input means; and
vertex detecting means for detecting the information as to the vertexes on the basis of said outline extracted by said outline extracting means.
16 . An apparatus according to claim 14 , wherein said correcting means performs a correction for developing said information as to said original into a plane.
17 . An apparatus according to claim 14 , wherein said distance measuring means measures the distance by performing an iterative convergence calculation.