CN102252621A

CN102252621A - Handwriting identification method

Info

Publication number: CN102252621A
Application number: CN2011101237646A
Authority: CN
Inventors: 谭国清
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2011-11-23
Anticipated expiration: 2031-05-11
Also published as: CN102252621B

Abstract

The invention discloses a handwriting identification method. The method comprises the following steps: illuminating a stroke 1 to be measured respectively with a light ray 3 having an included angle of less than 10 degrees with paper 2 and a light ray 3 having any one included angle between 30 degrees and 60 degrees with the paper 2; photographing the stroke 1 by using an optical observation instrument and a digital camera device from the position above the paper 2 to respectively measure the width of the stroke 1 in the first situation and the width of a shadow segment 4 formed on the stroke 1 by the depressing edge of the stroke 1 under the illumination of the light 3 in the second situation; solving the ratio of the width of the shadow segment 4 to the width of the stroke 1 to obtain a measurement index; repeating above steps to obtain measurement indexes of the stroke 1 with different handwriting structure types; making a handwriting measurement index graph of a reference piece by using the stroke 1 with different handwriting structure types as an abscissa axis and using the measurement indexes as a vertical axis; and making a handwriting measurement index graph of a piece to be identified, and comparing the two handwriting measurement index graphs to identify whether the handwriting of the piece to be identified is true or false. The method can be used for accurately identifying whether handwriting is true or false in a lossless state.

Description

The handwriting discrimination method

One, technical field

The present invention relates to the method that a kind of handwriting is discerned the false from the genuine, particularly a kind of method of the harmless discriminating handwriting true and false.

Two, background technology

The present handwriting method of discerning the false from the genuine and adopting naked eyes to differentiate usually, the contrast writing, but during for the imitative font of height, often hard to distinguish between the true and false, having is exactly that naked eyes are differentiated the discrimination standard difference that each differentiates the people again, and it is very big to make a difference.Go back neither one at present and carry out the method that handwriting is differentiated from qualitative, quantitative aspect, even there is the people to want to carry out writing measurement and discriminating with electron probe class exact instrument, but this method can cause damage to exhibit usually.

Three, summary of the invention

The object of the present invention is to provide a kind of harmless, can be accurately handwriting distinguishing method between true and false qualitatively.

A kind of handwriting discrimination method is characterized in that it may further comprise the steps:

A. lie in a horizontal plane on the measuring table with reference to the part paper, the stroke of selecting writing part on the paper is as object of observation, use with the light of paper plane included angle stroke is shone less than 10 °, above paper, use optical observation instrument and digital photographing apparatus that stroke is photographed, measure the width of stroke;

When b. changing the unspecified angle between light and the paper plane included angle to 30 °-60 ° stroke is shone, above paper, use optical observation instrument and digital photographing apparatus that stroke is photographed, measure the width of the shadow section that the stroke concave edges forms under irradiate light on stroke;

C. obtain the ratio of shadow section width and stroke width, obtain measuring index;

D. get the stroke of writing different types of structure on the paper, repeating above-mentioned steps, obtain the measurement index of the stroke correspondence of writing different types of structure, is transverse axis with the stroke of writing different types of structure, to measure index is the longitudinal axis, makes with reference to the part writing and measures index map;

E. make to be identified writing again by above-mentioned steps and measure index map accordingly, relatively whether two curve shapes of measuring index map are similar; If similar, then two kinds of handwritings are same person writings, if shape is obviously different, then two kinds of handwritings are not same person writings.

When carrying out the handwriting discriminating with this method, using when less than 10 ° light stroke being shone with the paper plane included angle, since paper to the reflection of light and stroke to light to be reflected in the digital image that forms on optical observation instrument and the digital photographing apparatus be different, therefore can be at the auxiliary developed width of stroke in digital image of measuring easily down as object of observation of computing machine.Employing light and paper plane included angle are that the unspecified angle between 30 °-60 ° shines stroke, at this moment the relative stroke of shadow section that forms on stroke under irradiate light of stroke concave edges itself also is different for the degree of reflection of light, the digital image that they form is also different, because irradiating angle is between 30 °-60 °, so the width of shadow section equates with the degree of depth of stroke pit or roughly the same in the digital image, try to achieve the measurement index with the ratio of shadow section width and stroke width, just in time reflected writing physical strength, so the measurement index that the different people writing physical strength does not form simultaneously is different, make measurement index map everyone writing physical strength of reflection then more directly perceived in conjunction with writing different types of structure stroke, the measurement index map that the writing that same person is write within a certain period of time makes roughly is identical or similar, the measurement index map that the writing that different people is write makes then difference is very big, the actual of curve shape reflection of measuring index map like this is everyone writing physical strength, so just can make and measure index map and compare with measurement index map with reference to writing according to writing to be identified, under the prerequisite of not damaging handwriting, accurately differentiate the true and false of handwriting qualitatively.

Four, description of drawings

The synoptic diagram of stroke and light when Fig. 1 is a handwriting discrimination method a step of the present invention;

The synoptic diagram of stroke and light when Fig. 2 is a handwriting discrimination method b step of the present invention;

Five, embodiment

Below in conjunction with accompanying drawing handwriting discrimination method of the present invention is elaborated.

In the time need differentiating, just can be undertaken by the method for the invention to the writing true and false on certain part of file.To find earlier before the discriminating writing to be identified with reference to the part literal, differentiate by the following method then:

The first step, to lie in a horizontal plane on the measuring table as the paper 2 of reference part, select the stroke 1 of writing part on the paper 2, as " point " on the writing as object of observation, use with paper 2 plane included angles 3 pairs of strokes 1 of light and shine less than 10 °, at this moment the degree of reflection of 1 pair of light 3 of the reflection of 2 pairs of light 3 of paper and stroke is different, above paper 2, use optical observation instrument and digital photographing apparatus, as optical microscope stroke 1 is photographed with digital camera, obtain digital image, go out stroke 1 width numerical value in the digital image with computer aided measurement again;

Second step, change light 3 and paper 2 plane included angles as preferred version, when light 3 and paper 2 angles equal 45 ° (in the reality light of 30 ° of-60 ° of angles all can), to shining with unicursal 1, shadow section 4 relative stroke 1 degree of reflection to light 3 of stroke 1 concave edges formation on stroke 1 under light 3 irradiations at this moment own also are different, same position uses optical observation instrument and digital photographing apparatus that stroke 1 is photographed above paper 2, and the subsidiary that uses a computer goes out the width numerical value of the shadow section 4 that stroke 1 concave edges forms in the digital image on stroke 1 under light 3 irradiations;

The 3rd goes on foot, and obtains the ratio of shadow section 4 width and stroke 1 width, obtains the measurement index of this " point " stroke;

The 4th step, the stroke 1 of writing different types of structure is got in continuation on reference part paper 2, as get " left-falling stroke " as measuring object, repeat above-mentioned first to the 3rd step, obtain the measurement index of " left-falling stroke " stroke, continue to repeat above-mentioned steps, until stroke 1 that obtains the writing different types of structure as " point; cast aside; press down; horizontal stroke; folding; perpendicular, hook " corresponding measurement index; with the stroke 1 of writing different types of structure; i.e. " point, cast aside, press down, horizontal, folding, perpendicular, hook " etc. be transverse axis; " point, cast aside, press down, horizontal, folding, perpendicular, hook " corresponding be longitudinal axis value to measure index, make with reference to part and measure index map;

The 5th step, use to be identified paper 2, make to be identified the corresponding index map of measuring again by above-mentioned first to fourth step, relatively whether two curve shapes of measuring index map are similar; If similar, then two kinds of handwritings are same person writings, if shape is obviously different, then two kinds of handwritings are not same person writings.

The measurement index map shape of same individual interior handwriting during certain roughly is the same, if high imitative part, because the dynamics when writing is different with dynamics as this people of genuine piece, and the writing physical strength that the measurement index map just in time reflects, therefore the measurement index map difference of true and false handwriting is very big, is easy to just distinguish out the true and false like this.

Claims

1. handwriting discrimination method is characterized in that it may further comprise the steps:

A. lie in a horizontal plane on the measuring table with reference to part paper (2), select paper (2) to go up the stroke (1) of writing part as object of observation, use with the light (3) of paper (2) plane included angle stroke (1) is shone less than 10 °, use optical observation instrument and digital photographing apparatus that stroke (1) is photographed in paper (2) top, measure the width of stroke (1);

When b. changing the unspecified angle between light (3) and paper (2) plane included angle to 30 °-60 ° stroke (1) is shone, use optical observation instrument and digital photographing apparatus that stroke (1) is photographed in paper (2) top, measure stroke (1) concave edges goes up the shadow section (4) that forms at stroke (1) under light (3) irradiation width;

C. obtain the ratio of shadow section (4) width and stroke (1) width, obtain measuring index;

D. get paper (2) and go up the stroke (1) of writing different types of structure, repeating above-mentioned steps, obtain the corresponding measurement index of stroke (1) of writing different types of structure, is transverse axis with the stroke (1) of writing different types of structure, to measure index is the longitudinal axis, makes with reference to the part writing and measures index map;