JP2018028857A - Readability evaluation device, method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a readability evaluation device which can quantitatively evaluate the readability of displayed sentence information in view of the age of a viewer.SOLUTION: The readability evaluation device is for evaluating the readability of displayed sentence information, and includes: a sentence information input section 15 for inputting displayed sentence information; an operation input section 13 for inputting the age of a viewer who reads the sentence information; and a processing unit 11 for extracting a readability element as an element affecting the ease of reading the sentence information from the sentence information and determining a readability element value showing the readability of the extracted readability element based on the age of a viewer who reads the readability element and the sentence information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a readability evaluation apparatus, method, and program.

  The text is a means for transmitting information, and it is desirable that the text is easy to read so that the information is quickly transmitted.

  Therefore, readability is used as a means for expressing the degree of text readability.

  The readability of a sentence can be determined based on various factors forming the sentence such as the font, size, number of characters included in one line, or line spacing.

  For example, Patent Document 1 proposes a method for comprehensively and quantitatively evaluating the readability of a sentence.

  Patent Document 1 evaluates a text height and a character width included in an evaluation object by using a predetermined evaluation formula, with the text to be displayed as an image and its display mode as an evaluation object, and improves the readability of the evaluation object. It is disclosed to evaluate.

JP 2012-233062 A

  It is known that a viewer who reads a displayed sentence has different readability depending on age even in the same sentence.

  For example, with age, the transmittance of the crystalline lens in the eye decreases and the yellowing of the crystalline lens progresses, so that blue (short wavelength) light tends to become difficult to see. Are known.

  Considering that the proportion of elderly people will increase in the future, as in Japan, in order to create sentences that can be read properly by elderly people even when the viewers are elderly people (for example, 65 years or older). In addition, it is desirable to be able to evaluate the readability of sentences.

  However, the method disclosed in Patent Document 1 cannot evaluate the readability of a sentence in consideration of the viewer's age.

  In addition, the method disclosed in Patent Document 1 expresses the evaluation result of the readability of the evaluation object in a form of good or bad, so that the degree of readability is good or the readability is known. There was a problem that could not be done.

  Therefore, an object of the present specification is to propose a readability evaluation apparatus, method, and program that quantitatively evaluate the readability of displayed text information in consideration of the age of a viewer.

  According to the readability evaluation device disclosed in the present specification, the sentence information input unit that inputs the displayed sentence information, the operation input unit that inputs the age of the viewer who reads the sentence information, and the sentence information, A readability element value that indicates the readability of the extracted readability element is extracted based on the readability element and the age of the viewer who reads the text information. A processing unit to be obtained.

  Further, according to the method for evaluating readability disclosed in the present specification, a readability element that is an element that affects the readability of the text information is extracted from the displayed text information, and the readability element and the text are extracted. Based on the age of the viewer who reads the information, a readability element value indicating the readability of the extracted readability element is obtained.

  Furthermore, according to the method program for evaluating readability disclosed in the present specification, a readability element that is an element affecting the readability of the text information is extracted from the displayed text information, and the readability element and the above Based on the age of the viewer who reads the text information, the computer is caused to calculate a readability element value indicating the readability of the extracted readability element.

  According to the readability evaluation apparatus disclosed in the present specification described above, the readability of displayed text information can be quantitatively evaluated in consideration of the age of the viewer.

  Moreover, according to the method for evaluating readability disclosed in the present specification, the readability of displayed text information can be quantitatively evaluated in consideration of the age of the viewer.

  Furthermore, according to the method program for evaluating readability disclosed in the present specification described above, the readability of the displayed text information can be quantitatively evaluated in consideration of the age of the viewer.

It is a figure which shows one Embodiment of the readability evaluation apparatus disclosed by this specification. It is a figure which shows the printed matter which displays text information. It is a figure which shows the image displayed on the display part. It is a flowchart which determines the readability element value of line length. It is a figure which shows the table which links | relates line length and a readability element value. FIG. 6 is a flow diagram for determining readability element values between lines. It is a figure which shows the table which matches a line spacing and a readability element value. It is a figure explaining the 1st type evaluation function and the 2nd type evaluation function. It is FIG. (1) explaining the 2nd kind of evaluation function. It is FIG. (2) explaining the 2nd kind of evaluation function. It is a figure explaining the relationship between the 1st type evaluation function and the 2nd type evaluation function. It is a flowchart which determines the readability element value and evaluation score of a character string area | region. It is a figure which shows the table which correlates the readability element value of a character string area | region, and an evaluation point. It is a flowchart which determines the readability element value of the font of a character. It is a figure which shows the table which associates the font of a character, and a readability element value. It is a flowchart which determines the readability element value of a character density. It is a figure which shows the table which correlates a character density and a readability element value. FIG. 6 is a flow diagram for determining readability element values for character size. It is a figure which shows the table which correlates the size of a character, and a readability element value.

  Hereinafter, a preferred embodiment of the readability evaluation device disclosed in the present specification will be described with reference to the drawings. However, the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a diagram illustrating an embodiment of a readability evaluation device disclosed in this specification. FIG. 2 is a diagram illustrating a printed matter on which text information is displayed.

  The readability evaluation device 10 of the present embodiment evaluates the readability of displayed text information based on the age of a viewer who reads text information.

  The displayed text information includes text in which a plurality of characters are arranged side by side so that the viewer can visually recognize the text information. In addition, the characters forming the displayed text information are arranged on the display device such as a liquid crystal display together with the characters printed on a print medium such as paper, including a photoset dial or digital font. Contain the characters The sentence information is a sentence that is printed and displayed when printed on a print medium such as paper. In addition, when the text information is displayed on a display device such as a liquid crystal display, the text information includes text information and editing information such as font, size, and line spacing.

  As printed matter, for example, product manuals, forms, contracts, books, and the like can be used.

  The readability evaluation apparatus 10 extracts line length, line spacing, character string region, character font, character density, and character size from the sentence information as readability elements that are elements that affect the readability of the sentence information. Find a readability element value that indicates the readability of the element.

  The line length is the number of characters included in one line.

  Line spacing is between lines. For example, the same line spacing as the character height of the characters forming the line can be 100%.

  The character string region is a region that includes one or more characters having the same set of character color, background color, and character size.

  The font of characters is a font of characters forming a sentence such as Mincho or Gothic.

  The character density is the number of characters per unit area of the paper on which the text information is displayed. For example, when 1000 characters are printed on A4 size paper, the character density is 1000 / (21 cm × 29.7 cm).

  The character size is the size of a character forming a sentence represented by pt (point) or the like.

  FIG. 2 shows a printed matter 20 on which a plurality of sentences are printed and displayed. The printed material 20 includes the displayed text information. The printed matter 20 has sentence information including a plurality of line length sentences, a plurality of line spaces, a plurality of character string regions, a plurality of character fonts, and a plurality of character sizes. The character string area includes a plurality of colors. The printed matter 20 includes vertically written sentences and horizontally written sentences.

  The readability evaluation device 10 includes a processing unit 11, a storage unit 12, an operation input unit 13, a display unit 14, and a text information input unit 15 as hardware components.

  The processing unit 11 includes one or a plurality of processors and peripheral circuits. The processing unit 11 performs control and various processing of each hardware component of the readability evaluation device 10 according to a predetermined program stored in advance in the storage unit 12, and temporarily stores data generated during the processing. The storage unit 12 is used.

  The storage unit 12 may include a semiconductor memory such as a random access memory (RAM) or a read only memory (ROM), a magnetic disk, or a flash memory. The storage unit 12 may include a drive that can read a storage medium that stores a predetermined program. The storage unit 12 stores the text information input by the text information input unit 15.

  The operation input unit 13 is operated by an operator of the readability evaluation device 10 and can input operation information such as the age of a viewer who reads text information. For example, a touch panel or a keyboard can be used as the operation input unit 13.

  The display unit 14 can display various types of information under the control of the processing unit 11. For example, a liquid crystal display can be used as the display unit 14.

  The text information input unit 15 is controlled by the processing unit 11 and inputs an image of a printed matter having the displayed text information as image information. The image information input by the text information input unit 15 is converted into, for example, PDF (Portable Document Format) data or image data (Png format, BMP format, JPEG format) by the processing unit 11 and stored in the storage unit 12. . For example, an image scanner can be used as the text information input unit 15.

  The text information input unit 15 inputs the paper size of the paper on which the text information is displayed together with the image information. The paper size information is stored in the storage unit 12 in association with the image information.

  The text information input unit 15 can also input PDF data or image data of text information as an electronic file.

  The text information input by the text information input unit 15 is subject to readability evaluation. The processing unit 11 evaluates the readability of the text information based on the image information having the text information stored in the storage unit.

  Moreover, the readability evaluation apparatus 10 may have a communication unit that can communicate with a network (not shown). The readability evaluation device 10 may input text information using a communication unit.

  As the readability evaluation device 10, for example, a computer or a state machine can be used.

  FIG. 3 is a diagram illustrating an image displayed on the display unit.

  The operator of the readability evaluation apparatus 10 uses the text information input unit 15 to input text information to be subjected to mobility evaluation, and then inputs the age of the viewer who reads the text information using the operation input unit 13. To do. The input age of the viewer is displayed in the age column of the display unit 14.

  Next, when the operator of the readability evaluation apparatus 10 operates an analysis button displayed on the display unit 14, the readability evaluation apparatus 10 starts evaluating the readability of the input text information.

  Next, the operation in which the readability evaluation apparatus 10 evaluates the readability of input text information will be described below with reference to the drawings.

  The operation in which the readability evaluation apparatus 10 evaluates the line length as the readability element will be described below with reference to FIG.

  First, in step S401, the readability evaluation device 10 extracts each line included in the sentence information from the input sentence information. The readability of line length is evaluated for each line.

  Next, in step S402, the readability evaluation device 10 obtains the number of characters (line length) included in each line.

  Next, in step S <b> 403, the readability evaluation device 10 determines a readability element value indicating the readability of the line length of each line based on the line length of each line and the age of the viewer who reads the text information.

  FIG. 5 is a diagram illustrating a table T1 that associates row lengths with readability element values.

  In the table T1, the line length x and the readability element value are registered in association with each other. The relationship between the line length x and the readability element value is different based on the age of the viewer who reads the text information. The table T1 is stored in the storage unit 12.

(If the viewer's age is less than A)
When the row length x is 1 or more and less than the threshold value LA1 or the threshold value LA6 or more, the readability element value is 0 point. When the row length x is greater than or equal to the threshold LA1 and less than the threshold LA2, or greater than or equal to the threshold LA5 and less than the threshold LA6, the readability element value is three points. When the row length x is greater than or equal to the threshold LA2 and less than the threshold LA3, or greater than or equal to the threshold LA4 and less than the threshold LA5, the readability element value is 6 points. Furthermore, when the line length x is not less than the threshold value LA3 and less than the threshold value LA4, the readability element value is 10 points. Here, there is a relationship of 1 <LA1 <LA2 <LA3 <LA4 <LA5 <LA6.

(If the viewer's age is A or older)
When the line length x is 1 or more and less than the threshold LB1, or the threshold LB6 or more, the readability element value is 0 point. When the row length x is not less than the threshold value LB1 and less than the threshold value LB2 or not less than the threshold value LB5 and less than the threshold value LB6, the readability element value is 3 points. When the row length x is not less than the threshold LB2 and less than the threshold LB3 or not less than the threshold LB4 and less than the threshold LB5, the readability element value is 6 points. Further, when the row length x is not less than the threshold LB3 and less than the threshold LB4, the readability element value is 10 points. Here, there is a relationship of 1 <LB1 <LB2 <LB3 <LB4 <LB5 <LB6. Further, there is a relationship of LA3 <LB3, and in order to obtain the same readability element value, higher readability is required when the viewer is older. Thus, the line length x, which is the readability element, is compared with the threshold value to obtain the readability element value, and the threshold value is changed based on the age of the viewer who reads the text information.

  For example, the age A can be 65 years old. In the example shown in FIG. 5, the relationship between the line length and the readability element value is different at the age A, but the relationship between the line length and the readability element value is different based on a plurality of ages. Good. Note that the number of thresholds is an example, and the number of thresholds may be smaller or larger.

  The processing unit 11 of the readability evaluation apparatus 10 determines the readability element value of the row length of each row while referring to the table T1 stored in the storage unit 12.

  Next, in step S404, the readability evaluation device 10 obtains an average value of the readability element values of the line lengths of all the lines included in the text information.

  Next, in step S <b> 405, the readability evaluation device 10 displays the average value of the obtained readability element values on the display unit 14. In the example shown in FIG. 3, the average value of the readability element values is displayed in the line length column.

  Next, the operation in which the readability evaluation apparatus 10 evaluates the line spacing as the readability element will be described below with reference to FIG.

  First, in step S601, the readability evaluation device 10 extracts a line space included in the sentence information from the input sentence information. The readability between lines is evaluated for each line.

  Next, in step S602, the readability evaluation apparatus 10 determines a readability element value indicating the readability between the lines based on the space between the lines and the age of the viewer who reads the text information.

  FIG. 7 is a diagram showing a table T2 for associating line spacing with readability element values.

  In the table T2, the line spacing x and the readability element value are registered in association with each other. The relationship between the line spacing x and the readability element value is different based on the age of the viewer who reads the text information. The table T2 is stored in the storage unit 12.

(If the viewer's age is less than A)
When the line spacing x is greater than or equal to 0 and less than the threshold value BA1, or greater than or equal to the threshold value BA3, the readability element value is 0 points. When the line spacing x is not less than the threshold BA1 and less than the threshold BA2, the readability element value is 5 points. Furthermore, when the line spacing x is not less than the threshold BA2 and less than the threshold BA3, the readability element value is 10 points. Here, there is a relationship of 0 <BA1 <BA2 <BA3.

(If the viewer's age is A or older)
When the line spacing x is 0 or more and less than the threshold value BB1, or the threshold value BB3 or more, the readability element value is 0 point. When the line spacing x is not less than the threshold value BB1 and less than the threshold value BB2, the readability element value is 5 points. Furthermore, when the line spacing x is not less than the threshold value BB2 and less than the threshold value BB3, the readability element value is 10 points. Here, there is a relationship of 0 <BB1 <BB2 <BB3. Further, there is a relationship of BA2 <BB2, and in order to obtain the same readability element value, higher readability is required when the viewer is older. In this manner, the line spacing x, which is the readability element, is compared with the threshold value to obtain the readability element value, and the threshold value is changed based on the age of the viewer who reads the text information.

  For example, the age A can be 65 years old. In the example shown in FIG. 7, the relationship between the line spacing and the readability element value is different at the age A, but the relationship between the line spacing and the readability element value may be different based on a plurality of ages. Good. Note that the number of thresholds is an example, and the number of thresholds may be smaller or larger.

  The processing unit 11 of the readability evaluation apparatus 10 determines the readability element value of each row length while referring to the table T2 stored in the storage unit 12.

  Next, in step S603, the readability evaluation device 10 obtains an average value of readability element values between all the lines included in the text information.

  Next, in step S604, the readability evaluation device 10 displays the average value of the obtained readability element values on the display unit 14. In the example illustrated in FIG. 3, the average value of the readability element value is displayed in the column between lines.

  Next, the determination of the readability element value of the character string area as the readability element by the readability evaluation apparatus 10 will be described below with reference to the drawings.

  It is known that the readability of text by the text color and background color affects the text size as well as the combination of colors and the age of the viewer. Further, it is known that a color image displayed on a display unit and a color image printed by a printing apparatus have different hues based on the same color image data. Therefore, even if it is determined that it is easy to see on the screen, when a color image is actually printed, it may be reproduced with a color different from that on the screen due to the characteristics of the ink used, and as a result, it may be determined that it is difficult to see.

  Therefore, the readability evaluation device 10 extracts a set of character color, background color and character size of the character string region as the readability element, and based on the readability element, the age of the viewer, and the characteristics of the printing device, Find the readability element value.

  For example, when the text information has N character string regions, the readability evaluation device 10 (character color # 1, background color # 1, character size # 1), (character color # 2, background color # 2, Character size # 2)... (Character color #N, background color #N, character size #N) is extracted as a readable element. Here, it is assumed that each character string region includes a plurality of colors such as black and white.

  The readability element value of the character color, background color, and character size set in the character string area is the color difference between the value of the first type evaluation function depending on the age and character size of the viewer, and the character color and the background color. And the age of the viewer and the value of the second type of evaluation function depending on the characteristics of the printing apparatus.

  First, the first type evaluation function will be described below.

  The first type of evaluation function uses the evaluation function derived from the reading evaluation results by MNREAD-J for the age and various character / background color combinations that were performed in advance. Judgment.

  MNREAD is a method developed by Mansfield, Legge, & Bane (1996) that measures reading speed of text and makes it easy to read what has been read quickly and accurately. Reading obtained from character size and reading speed. This is a method of measuring readability from the speed function. The MNREAD method presents stimulating sentences step by step from a sufficiently large character size for each sentence, makes the viewer read aloud as quickly and accurately as possible, and determines the reading speed for each character size. Ease of reading and difficulty in reading can be expressed by three measures. That is, the size of the character that can be read at the limit = Reading visual acuity that indicates the character size at which the correct answer rate of the reading material is 50% (Reading Accuracy, hereinafter RA, the unit is logMAR), the minimum character size that can maintain the maximum reading speed When the character size is sufficiently large (Critical Print Size, hereinafter referred to as CPS, the unit is logMAR) indicating the character size immediately before the reading speed becomes smaller than twice the standard deviation of the maximum reading speed. The maximum reading speed (Maximum Reading Speed, hereinafter referred to as MRS, the unit is char / min) is converted into a numerical value based on the reading speed of the character size larger than CPS. Is done. A Japanese version of MNREAD on paper (hereinafter referred to as MNREAD-J) developed by Oda, Mansfield, Legge (1998), digitized by Oda / Nishimura (2002), and a reading evaluation program pcMNREAD controlled on a personal computer -J was developed.

For details of MNREAD-J, refer to the following web page, for example.
Koichi Oda, “MNREAD-J, Jk Chart Manual”, [online], May 18, 2002, [searched September 17, 2014], Internet <URL: http://www.cis.twcu.ac. jp / ~ k-oda / MNREAD-J / MNREAD-J-JkMan020518.pdf>

  Below, the function derived from the reading evaluation result by MNREAD-J for each viewer's age and its coefficient will be described. Here, the age of the viewer is divided every 10 years. For example, the age of 65 is divided into the ages of 60 to 69 years.

  Let C (δ) be the color difference of a certain character / background color combination (the color difference can be in any color space).

  The relationship between C (δ) and the CPS obtained from the reading evaluation result is expressed by Expression (1) in FIG.

  Here, A (age) is a slope when the relationship between the logarithm of CPS and the logarithm of C (δ) is represented by a straight line, and changes depending on the age of the viewer.

  B (age) is a part of the intercept when the logarithm of CPS and the logarithm of C (δ) is represented by a straight line, and changes depending on the age of the viewer.

  D (age) is the slope when the result of reading evaluation by MNREAD-J is fitted to a curve. D (age) changes depending on the age of the viewer.

  A numerical value of 1.097 is a coefficient that does not depend on the age of the viewer when the reading evaluation result is fitted to a curve.

  Since the unit of CPS (MAR) is MAR, when a character size: P (unit: point) acquired from a color document with a viewing distance of 30 cm is used, it is expressed by Expression (2) in FIG.

  When Expression (1) and Expression (2) are used, Expression (3) in FIG. 8 is obtained as the first type evaluation function.

  In other words, since the CPS is the smallest character size that can maintain the maximum reading speed, the first kind of evaluation function shown in the equation (3) has a color difference that can maintain the maximum reading speed at a certain character size (= P): C (δ) is meant.

  The above is the description of the first type evaluation function.

  Next, the second type evaluation function will be described below.

  The second type of evaluation function is the color difference of the character / background color combination with the viewer's age as a parameter. The second type of evaluation function is obtained as C (age) from character color information and background color information acquired from the character string area.

  For example, when the character string area is a CMYK color gamut, the CMYK density values of the character color are (C1, M1, Y1, K1), and the CMYK density values of the background color are (C2, M2, Y2, K2). In this case, C (age), which is the second type of evaluation function, is obtained by equation (4) in FIG. Here, P is represented by equation (5) in FIG. 9, and Q is represented by equation (6) in FIG. a1 to p1 are constants that differ depending on the age of the viewer and the type of the output device such as a printing device. When each color density is 0%, the value of the paper white seen by an arbitrary age is p1.

  The above is the description of the second type of evaluation function.

  FIG. 11 is a diagram illustrating the relationship between the first type evaluation function and the second type evaluation function.

  FIG. 11 shows the first type of evaluation function C (δ). The vertical axis C (age) intercept of the first type evaluation function C (δ) is positive, and the first type evaluation function C (δ) decreases as the character size increases. The area on the upper right side of the line representing the first type evaluation function C (δ) is an area where characters are easy to read. The more you move to the upper right, the easier it will be to read the characters. As shown in FIG. 11, when the character size SIZE is selected, C (age) needs to be set to be equal to or greater than VALUE which is the value of C (δ) corresponding thereto. If the character size is reduced, the corresponding C (δ) is increased, so that the necessary C (age) is increased accordingly.

  The value of the second type of evaluation function C (age) depends on the color difference between the character color and the background color in the character string area, the age of the viewer, and the characteristics of the printing device. It is obtained for each of a plurality of generally included character string regions. In particular, the coefficients included in the equations (5) and (6) used in the equation (4) representing the second type evaluation function C (age) depend on the age of the viewer and the characteristics of the printing apparatus. is there. Therefore, the second type evaluation function C () is also used for the same character string region in which the color difference between the character color and the background color is the same if at least one of the characteristics of the viewer and the printing apparatus is different. The age value is different. Even if the characteristics of the viewer and the printing apparatus are the same, the value of the second type evaluation function C (age) is different if the color difference between the character color and the background color is different.

  The readability element value of the character string area is determined based on the above-described first type evaluation function C (δ) and second type evaluation function C (age).

  The value of the first type evaluation function C (δ) is used as a reference indicating the readability of characters included in the character string. This first type of evaluation function C (δ) depends on the age and character size of the viewer.

  Therefore, the first type of evaluation function C (δ) and the second type of evaluation function C (age) are compared. As the value of C (age) -C (δ) (> 0) approaches zero, it is determined that reading is difficult. If C (age) -C (δ) ≦ 0, it becomes more difficult to read.

  Therefore, the readability evaluation device 10 determines the readability element value of the character string region as a difference between the value of the first type evaluation function C (age) and the value of the second type evaluation function C (δ).

  Further, the readability evaluation device 10 may determine the readability element value of the character string region by the first type evaluation function C (age) − {second type evaluation function C (δ) + margin}.

  Next, an operation in which the readability evaluation device 10 evaluates a character string area as a readability element will be described below.

  First, in step S1201, the readability evaluation device 10 extracts each character string region included in the text information from the input text information. The character string region is a region that includes one or more characters having the same set of character color, background color, and character size. When two such areas exist apart, they are extracted as separate character string areas. The readability of the character string area is evaluated for each character string area.

  Next, in step S1202, the readability evaluation device 10 obtains the value of the first type evaluation function C (δ) and the value of the second type evaluation function C (age) for each character string region.

  Next, in step S1203, the readability evaluation apparatus 10 determines the value of the obtained first type evaluation function C (δ) and the value of the second type evaluation function C (age) for each character string region. Based on the above, the readability element value is obtained. As described above, the value of the first type evaluation function C (δ) and the value of the second type evaluation function C (age) are determined based on the age or age of the viewer. Therefore, the value of the first type evaluation function C (δ) and the value of the second type evaluation function C (age) are determined based on the age of the viewer who reads the character string region and the sentence information.

  Next, in step S1204, the readability evaluation apparatus 10 compares the readability element value of each character string region with a threshold value determined based on the age of the viewer who reads the text information, and evaluates the readability of the character string region. To do. As a result, the readability of the character string region is evaluated in a multi-step manner, so that it becomes easy to understand the degree of readability of the character string region.

  FIG. 13 is a diagram showing a table T3 associating the readability element value of the character string region with the evaluation point.

  In the table T3, the readability element value x of the character string region and the evaluation point are registered in association with each other. The relationship between the readability element value x of the character string region and the evaluation point differs based on the age of the viewer who reads the text information. The table T3 is stored in the storage unit 12.

(If the viewer's age is less than A)
When the readability element value x in the character string area is smaller than the threshold value CA1, the evaluation score is 0. Further, when the readability element value x of the character string region is not less than the threshold value CA1 and less than the threshold value CA2, the evaluation score is 5. Furthermore, when the readability element value x of the character string area is equal to or greater than the threshold value CA2, the evaluation score is 10 points. Here, there is a relationship of CA1 <CA2.

(If the viewer's age is A or older)
When the readability element value x in the character string area is smaller than the threshold value CB1, the evaluation score is 0. Further, when the readability element value x of the character string region is not less than the threshold value CB1 and less than the threshold value CB2, the evaluation score is 5. Furthermore, when the readability element value x of the character string region is equal to or greater than the threshold value CB2, the evaluation score is 10 points. Here, there is a relationship of CB1 <CB2. Further, there is a relationship of CA2 <CB2, and in order to obtain the same evaluation score, higher readability is required when the viewer is older.

  For example, the age A can be 65 years old. In the example shown in FIG. 13, the relationship between the readability element value of the character string region and the evaluation point is different from the age A, but the relationship between the readability element value of the character string region and the evaluation point is a plurality of ages. You may make it differ based on. Note that the number of thresholds is an example, and the number of thresholds may be smaller or larger.

  The processing unit 11 of the readability evaluation device 10 obtains an evaluation score for each character string region while referring to the table T3 stored in the storage unit 12.

  Next, in step S1205, the readability evaluation device 10 obtains an average value of evaluation points of all character string regions included in the text information.

  Next, in step S1206, the readability evaluation device 10 displays the average value of the obtained evaluation points on the display unit 14. In the example shown in FIG. 3, the average value of the evaluation points of the character string area is displayed in the column of the character string area.

  In addition, the readability evaluation apparatus 10 may obtain the readability of the character string area included in the text information as an average value of the readability element values of the character string area. In this case, the process of step S1204 is omitted, and the readability evaluation apparatus 10 obtains the average value of the readability element values of all the character string regions included in the text information in step S1205, and obtains the value in step S1206. The average value of the readability element value is displayed on the display unit 14.

  Next, an operation in which the readability evaluation apparatus 10 evaluates a font as a readability element will be described below with reference to FIG.

  First, in step S1401, the readability evaluation device 10 extracts each character included in the text information from the input text information. The readability of the font is evaluated for each character.

  Next, in step S1402, the readability evaluation device 10 identifies the font of each character.

  Next, in step S1403, the readability evaluation device 10 determines a readability element value indicating the readability of the font of each character based on the font of each character.

  FIG. 15 is a diagram showing a table T4 that associates character fonts with readability element values.

  In the table T4, character fonts and readability element values are registered in association with each other. In the table T4, it is preferable that the font of the character and the readability element value are associated and registered so as to include the font included in the input sentence information. The table T4 is stored in the storage unit 12.

  In the example shown in Table T4, when the font of the character is Mincho, the readability element value is 0 point. When the character font is Gothic, the readability element value is 10 points.

  The processing unit 11 of the readability evaluation device 10 determines the readability element value of the font of each character while referring to the table T4 stored in the storage unit 12.

  Next, in step S1404, the readability evaluation device 10 obtains an average value of readability element values of fonts of all characters included in the text information.

  Next, in step S1405, the readability evaluation apparatus 10 displays the average value of the obtained readability element values on the display unit 14. In the example shown in FIG. 3, the average value of the readability element value is displayed in the font column.

  Next, the operation in which the readability evaluation apparatus 10 evaluates the character density as the readability element will be described below with reference to FIG.

  First, in step S1601, the readability evaluation device 10 detects the paper size of the paper on which the text information is displayed. The paper size information is stored in the storage unit 12 together with image information such as PDF data or image data. The processing unit 11 reads out information on the paper size associated with the image information from the storage unit 12.

  Next, in step S1602, the readability evaluation device 10 detects the number of characters included in the text information.

  Next, in step S1603, the readability evaluation device 10 obtains the number of characters per unit area of the paper on which the text information is displayed as the character density. The character density is a quotient obtained by dividing the number of characters included in the text information by the area of the paper determined based on the paper size. The relationship between the paper size and the paper area is stored in the storage unit 12. As a unit of character density, for example, the number of characters per square centimeter can be used.

  Next, in step S1604, the readability evaluation device 10 determines a readability element value indicating the readability of the line length of each line based on the character density.

  FIG. 17 is a diagram showing a table T5 for associating the character density with the readability element value.

  In the table T5, the character density and the readability element value are registered in association with each other. The table T5 is stored in the storage unit 12.

  When the character density x is larger than the threshold value TC1, the readability element value is 0 point. Further, when the character density x is not less than the threshold value TC2 and less than the threshold value TC1, the readability element value is 5 points. Further, when the character density x is equal to or less than the threshold value TC2, the readability element value point is 10 points. Here, there is a relationship of TC2 <TC1. Note that the number of thresholds is an example, and the number of thresholds may be smaller or larger.

  The processing unit 11 of the readability evaluation device 10 determines the readability element value of the character density while referring to the table T5 stored in the storage unit 12.

  Next, in step S1605, the readability evaluation device 10 displays the obtained readability element value on the display unit 14. In the example shown in FIG. 3, the readability element value is displayed in the character density column.

  Next, the operation in which the readability evaluation apparatus 10 evaluates the size of a character as a readability element will be described below with reference to FIG.

  First, in step S1801, the readability evaluation device 10 detects each character from the input text information. The readability of character size is evaluated for each character.

  Next, in step S1802, the readability evaluation device 10 identifies the size of each character.

  Next, in step S1803, the readability evaluation device 10 determines a readability element value indicating the readability of the size of each character based on the size of each character.

  FIG. 19 is a diagram illustrating a table T6 that associates character sizes with readability element values.

  When the character size x is greater than 0 and less than the threshold value TS1, the readability element value is 0 points. Further, when the character size x is not less than the threshold value TS1 and less than the threshold value TS2, the readability element value is three points. In addition, when the character size x is greater than or equal to the threshold value TS2 and less than the threshold value TS3, the readability element value is 6 points. Further, when the character size x is equal to or larger than the threshold value TS3, the readability element value point is 10 points. Here, there is a relationship of 0 <TS1 <TS2 <TS3. Note that the number of thresholds is an example, and the number of thresholds may be smaller or larger.

  The processing unit 11 of the readability evaluation apparatus 10 determines the readability element value of each character size while referring to the table T6 stored in the storage unit 12.

  Next, in step S1804, the readability evaluation device 10 obtains an average value of readability element values of all character sizes included in the text information.

  Next, in step S1805, the readability evaluation device 10 displays the average value of the obtained readability element values on the display unit 14. In the example shown in FIG. 3, the average value of the readability element value is displayed in the character size column.

  As described above, the readability evaluation device 10 evaluates each readability element of the text information and proposes a correction plan that improves the readability.

(Line length readability correction)
The readability evaluation apparatus 10 reduces the number of characters included in each line by dividing the line with respect to a line having a line length longer than a predetermined line length as a correction proposal for improving the readability element value of the line length. Propose a revised text information. Further, the readability evaluation device 10 includes, as a correction plan for improving the readability element value of the line length, a line having a line length shorter than a predetermined line length by combining adjacent lines and included per line. Propose a revision of text information with an increased number of characters.

(Fix readability between lines)
The readability evaluation apparatus 10 proposes a text information correction plan in which the line spacing is narrowed with respect to a text information portion having a line spacing wider than a predetermined space, as a correction plan for improving the legibility element value between lines. In addition, the readability evaluation apparatus 10 proposes a text information correction plan with an increased line spacing for a text information portion having a narrower line spacing than a predetermined line spacing, as a correction plan for improving the legibility element value between lines.

(Modification of readability of character string area)
As a modification for improving the readability element value of the character string area, the readability evaluation device 10 performs the character color and background color of the character string area with respect to the character string area whose readability element value of the character string area is lower than a predetermined value. Alternatively, a text information correction plan is proposed in which the readability element value of the character string area is improved by changing any of the character sizes.

(Correction of font readability)
The readability evaluation apparatus 10 proposes a text information correction plan in which a font having a low readability element value is changed to a font having a relatively high readability element value as a correction plan for improving the readability element value of the font.

(Modification of readability of character density)
The readability evaluation device 10 divides the sentence information into sentence information having a character density higher than a predetermined character density as a correction proposal for improving the readability element value of the character density, and the sentence information is spread over two sheets. We propose a proposal for correcting text information with reduced character density by changing it so that it is displayed.

(Fixed readability of character size)
The readability evaluation apparatus 10 is a correction plan for improving the readability element value of the character size. The sentence information with the improved readability element value by increasing the character size with respect to a character having a size smaller than a predetermined size. Proposed amendments to

  An operator of the readability evaluation apparatus 10 operates a correction button for each movable element (line length, line spacing, character string region, font, character density, or character size) displayed on the display unit 14 to thereby evaluate the readability. The apparatus 10 creates a correction plan for improving the mobility element value of the mobility element of the input text information and displays it on the display unit 14. The operator of the readability evaluation apparatus 10 can obtain text information with improved readability by adopting a correction plan for the displayed text information. On the other hand, if the operator of the readability evaluation apparatus 10 does not adopt the correction plan for the displayed text information, the operator can operate the button for returning the movable element displayed on the display unit 14 to correct the text information before correction. It can be returned to the state.

  According to the readability evaluation apparatus 10 of this embodiment mentioned above, the readability of the text information displayed can be quantitatively evaluated in consideration of the age of the viewer. Moreover, the readability evaluation apparatus 10 can create a correction plan that improves the readability of text information.

  In the present invention, the readability evaluation apparatus, method, and program of the above-described embodiments can be appropriately changed without departing from the gist of the present invention.

  For example, in the above-described embodiment, the readability element values of the font, the character density, and the character size of the character that is the readability element are not determined based on the age of the viewer who reads the text information. May be determined based on the age of the viewer who reads the text information.

  In the above-described embodiment, the readability element value of the character string region is evaluated by comparing the readability of the character string region with a threshold value that is determined based on the age of the viewer who reads the text information. Similarly, the readability element values of other readability elements may also be compared to a threshold determined based on the age of the viewer reading the text information to assess the readability of the readability element.

DESCRIPTION OF SYMBOLS 10 Readability evaluation apparatus 11 Processing part 12 Storage part 13 Operation input part 14 Display part 15 Text information input part T1-T6 Table 20 Printed matter

Claims (7)

From the displayed text information, extract a readability element that is an element affecting the readability of the text information,
A method for determining a readability element value indicating the readability of the extracted readability element based on the readability element and the age of a viewer who reads the text information. Comparing the readability element to a predetermined threshold to determine the readability element value;
The method according to claim 1, wherein the predetermined threshold is changed based on an age of a viewer who reads the sentence information.   The method according to claim 1, wherein the readability element is a set of a line length, a line space, or a character color, a background color, and a character size of a character string area included in the sentence information.   4. The readability of the readability element is evaluated by comparing the obtained readability element value with a threshold value determined based on an age of a viewer who reads the text information. The method described in 1. The readability element is a set of a character color, a background color, and a character size of the character string region,
Extract a set of character color, background color and character size from the character string area,
A value of a first type of evaluation function depending on the age and character size of the viewer who reads the text information is obtained, and the color difference between the character color and the background color and the age of the viewer are determined for the character string region. And the value of the second type of evaluation function depending on the characteristics of the printing device,
Based on the value of the obtained first type evaluation function and the value of the second type evaluation function, the readability element value is obtained, and the readability element value is used as the age of the viewer who reads the text information. The method according to claim 4, wherein the readability of the character string region is evaluated in comparison with a threshold value determined based on the method. A text information input unit for inputting the displayed text information;
An operation input unit for inputting the age of a viewer who reads the sentence information;
A readability element that is an element that affects the readability of the sentence information is extracted from the sentence information, and the readability of the readability element extracted based on the readability element and the age of a viewer who reads the sentence information. A processing unit for obtaining a readability element value indicating
A readability evaluation apparatus comprising:   The readability element extracted based on the readability element and the age of the viewer who reads the sentence information is extracted from the displayed sentence information by extracting a readability element that is an element that affects the readability of the sentence information. A program that causes a computer to obtain a readability element value indicating the readability of a computer.

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