CN102252621B

CN102252621B - Handwriting identification method

Info

Publication number: CN102252621B
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: 2012-11-28
Anticipated expiration: 2031-05-11
Also published as: CN102252621A

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 differentiate that each discrimination standard of differentiating the people is different 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. will 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 corresponding measurement index of stroke 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 descend measure easily the developed width of stroke in digital image assisting of computing machine as object of observation.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 under irradiate light, on stroke, forms 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, tries to achieve the measurement index with the ratio of shadow section width and stroke width, has 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 the measurement index map in conjunction with writing different types of structure stroke and then more intuitively reflect everyone writing physical strength, the measurement index map that the writing that same person is write within a certain period of time makes roughly is identical or similar, and 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, under the prerequisite of not damaging handwriting, accurately differentiate the true and false of handwriting qualitatively with measurement index map with reference to writing according to writing to be identified.

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 following method then:

The first step; To lie in a horizontal plane on the measuring table as paper 2, select the stroke 1 of writing part on the paper 2 with reference to part, like " 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, uses optical observation instrument and digital photographing apparatus, like the optical microscope of band digital camera stroke 1 is photographed; 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; At this moment the relative stroke of the shadow section that on stroke 1, forms down in light 3 irradiation of stroke 1 concave edges 41 itself also is different to the degree of reflection of light 3, and same position uses optical observation instrument and digital photographing apparatus that stroke 1 is photographed above paper 2, the subsidiary that uses a computer go out in the digital image stroke 1 concave edges under light 3 shines on stroke 1 the width numerical value of the shadow section 4 of formation;

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;

In the 4th step, continue on reference to part paper 2, to get the stroke 1 of writing different types of structure, 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 the repetition above-mentioned steps, until the stroke that obtains the writing different types of structure 1 as " point, left-falling stroke, right-falling stroke, horizontal stroke, folding, perpendicular, hook " corresponding measurement index; Stroke 1 with the writing different types of structure; Promptly " point, left-falling stroke, right-falling stroke, horizontal stroke, folding, perpendicular, hook " to wait be transverse axis, " point, left-falling stroke, right-falling stroke, horizontal stroke, folding, perpendicular, hook " is corresponding to be longitudinal axis value with the measurement index, makes with reference to part measurement 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 measure the writing physical strength that 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. will lie in a horizontal plane on the measuring table with reference to part paper (2); Selection paper (2) is gone 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);

B. change 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 in light (3) irradiation down at the last width of the shadow section (4) of formation of stroke (1);

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;