JPS6317269B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a character code/character pattern conversion device that allows character sizes and character spacing to be arbitrarily set. A character code/character pattern conversion device is a device that inputs a character code, which is code data determined to identify characters, such as JIS code or EBCDIC code, and converts the corresponding character into black and white dot information. It is a device that converts characters into objects (called character patterns). Image processing devices For example, in a facsimile device, one pixel is one bit or one dot, and the number of pixels in one line of an A4 size document (corresponding to one scanning line on a CRT, not one line of text) is 1728 bits, which is A3 size. It has a fixed number of bits, such as 2560 bits. Furthermore, in order to reduce the amount of data to be transmitted, facsimile devices generally do not transmit the photoelectric conversion output as is, but compress the band. When transmitting code output from a computer to a facsimile, similar bandwidth compression is required instead of the character pattern itself. Simply access a character generator (CG for short) with a code signal from a computer, output a character pattern signal such as 5 x 7 or 16 x 16 dots/character, and add band compression to it. When sending to a facsimile, the dot spacing is a small constant value as described above, so each character is all small and of a constant size. However, it is actually preferable to use large fonts for titles and other items that are easy to read, and to make annotations smaller and less conspicuous. Therefore
It is desirable to perform character enlargement/reduction processing on CG output, and the present invention seeks to provide a method that can satisfy such a requirement. The character code/character pattern conversion device of the present invention includes a circuit that receives a character code signal, generates a character pattern signal corresponding to the character code, and converts the character pattern signal into a run length code line by line; A multiplier that multiplies the run length code output by the circuit by a character enlargement ratio, a character spacing insertion circuit that adds the character spacing width to the enlarged run length code output from the multiplier, and a character spacing insertion circuit that calculates the total number of dots in one line. It is characterized by comprising a run-length adding circuit which presets an initial value to make a constant number and adds up the same white or black run-length codes sequentially inputted from the character spacing insertion circuit. This will be explained in detail with reference to examples. Even when enlarging characters, the number of pixels in one line of a facsimile is a fixed value, such as the above-mentioned 1728 bits or 2560 bits, and the characters and character spacing must be packed within this value. Therefore, assuming that the unit bit of one character is A, the enlargement rate of a character is N, the number of characters in one line is M, and the character interval is B, each variable must be determined so that the following equation holds. A4 size: 1728 = (A x N + B) x M, A x N
B A3 size: 2560 = (A x N + B) x M, A x N
B (A, N, B, M are integers) It is assumed here that the characters start at the beginning of the line, and each character is followed by the line spacing B. Table 1 shows the values of each variable when the unit bit number of one character is 16.

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【table】

Claims (1)

[Claims] 1. A circuit that receives a character code signal and generates a character pattern signal corresponding to the character code, converts the character pattern signal into a run-length code line by line, and enlarges the characters into the run-length code output by the conversion circuit. A multiplier that multiplies the rate, a character spacing insertion circuit that adds the character spacing width to the expanded run length code output by the multiplier, and a preset initial value to make the total number of dots in one line a constant number. A character code/character pattern conversion capable of enlarging a character pattern, characterized in that the character code/character pattern conversion is provided with a run-length addition circuit that adds up the same white or black run-length codes for the run-length codes sequentially inputted from the character spacing insertion circuit. Device.