JPS6252691A - Character recognizing device - Google Patents

Abstract

PURPOSE:To decide the number of candidates and their order in each font so as to finally decide the mixed decision by deciding a character string printed in multifont and its font so as to decide the character string based on both results. CONSTITUTION:Since characters entered on the same line are printed in the same font, a character deciding circuit 1 inputs plural decided results from the 1st candidate to the n-numbered one with respect to an inputted picture signal (b) to a font deciding circuit 2 and a character string deciding circuit 3 as a character deciding signal (c). With the aid of said signal (c) the font deciding circuit 2 outputs a signal as a font deciding signal (d). According to the character deciding signal (c) and the font deciding signal (d), the character string deciding circuit 3 decides the character string, and outputs it as a charac ter deciding signal (e) to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to reading multi-font printed character strings, and more particularly to a character recognition device equipped with a circuit for determining printed fonts.

[Conventional technology]

Conventionally, this type of character recognition device has made judgments for each person's individual cover turns independently from the distance between the input binary image and each standard pattern, and judged the character string by accumulating the judgments.

[Problem that the invention seeks to solve]

The above-mentioned conventional character recognition apparatus has the disadvantage that it does not have a correction function between characters because it makes a determination for each character.

On the other hand, mutual character correction functions such as word recognition processing and context processing have been devised to improve recognition rates and reduce misreading.

However, in order to carry out these processes, the configuration of the apparatus becomes complicated and the cost becomes high.

[Means for solving problems]

In order to eliminate such drawbacks, the present invention provides a character determination circuit for determining a printed character string of a multi-font based on a standard pattern created for each font, and a character determination circuit for determining a printed character string in accordance with the output result of this character determination circuit. A font determination circuit that determines the font of a column, and a character string determination circuit that determines a character string based on the output results of both the character determination circuit and the font determination circuit are provided.

(Operation) In the present invention, the reliability of the judgment is confirmed, and confusion judgment (judgment with several candidates in which the same character becomes "3" in the first candidate and "8" in the second candidate) is performed. ) make the final judgment.

C Embodiment] An embodiment of a character recognition device according to the present invention is shown in the figure. In the figure, l is a character determination circuit which inputs a standard pattern a for printed character determination and an image signal S and outputs a character determination signal C;
Reference numeral 2 designates a font determination circuit which inputs a character determination signal C and outputs a font determination signal d, and 3 designates a character string determination circuit which inputs a character determination signal C and a font determination signal d and outputs a character string determination signal e.

An overview of the operation of the character recognition device configured as described above will be explained. This device focuses on the fact that characters written on the same line are printed in the same font. The character determination circuit 1 outputs a plurality of determination results from the first candidate to the nth candidate for the input image signal. The plurality of determination results are inputted as a character determination signal C to the font determination circuit 2 and the character string determination circuit 3.

The font determination circuit 2 determines a font based on the input character determination signal C, and outputs it to the character string determination circuit 3 as a font determination signal d. The character string determination circuit 3 determines a character string based on the inputted character determination signal C and font determination signal d, and outputs it to the outside as a character string determination signal e.

Next, a case where the image signal is a number string of (1, 2, 3) will be explained. Regarding the first character of the image signal, ie, "1", Table 1 shows, as an example, the result of determination of the number by the character determination circuit 1 and the determination result of the font of that number by the font determination circuit 2.

According to this determination result, the first candidate for the first character is "1" for the number and A for the font.

The next second candidate is "7" for numbers and B for fonts. The second and third columns of Table 1 show the determination results for the second and third characters.

Table 2 summarizes the determination results shown in Table 1 regarding fonts. As shown in Table 2, font A has 1 to 3
All characters are candidates. On the other hand, in font B, the first character is only the second candidate.

The following fonts also have one or O candidates.

Therefore, the font selected in Table 2 is A,
This is output to the character string determination circuit 3 as a font determination signal d.

The character string determination circuit 3 selects the character string of phono A from the character determination signal C and the font determination signal d.

As shown in Table 1, the character string of this font A is (1,
2, 3), which matches the character string of the input image signal. The character string determination circuit 3 determines the character string (1,
2, 3) is output as a character string determination signal e.

〔Effect of the invention〕

As described above, the present invention includes a character determination circuit for determining a multi-font printed character string, a font determination circuit for determining the font of a printed character string according to the output result of the character determination circuit, and a character determination circuit. By providing a character string judgment circuit that judges character strings based on the output results of both circuits of the font judgment circuit, it is possible to judge the number and order of candidates in each font. This has the effect of making it possible to make the final judgment in confusion judgment. It also has the effect of realizing mutual correction of characters with a simple configuration and at a low cost compared to conventional word recognition processing and context processing.

[Brief explanation of the drawing]

The figure is a system diagram showing an embodiment of a character recognition device according to the present invention. 1... Character judgment circuit, 2... Font judgment circuit, 3... Character string judgment circuit.

Claims (1)

[Claims] a character determination circuit for determining a printed character string of a multi-font based on a standard pattern created for each font; a font determination circuit for determining the font of the printed character string according to the output result of the character determination circuit; A character recognition device comprising a character string determination circuit that determines a character string based on the output results of both a character determination circuit and a font determination circuit.