JPH0553569A - Data converting circuit for still picture system - Google Patents

Abstract

PURPOSE:To obtain character and graphic data which can be inputted in an optional-shape and optional-size state and processed without using any character generator. CONSTITUTION:The still picture system includes a character and graphic data converting circuit 16 consisting of an RGB encoder 21 which converts the character and figure data inputted from a still picture input device into a Y (brightness) signal and a comparator which converts the converted Y signal into one-bit character and graphic data, and a character and graphic memory 17 stored with the data of the character and graphic data converting circuit 16. When data are inputted from the still picture input device 11, image data are stored in an image memory 15. Character and graphic data are inputted to the RGB encoder 21 of the character and graphic data converting circuit 16 and converted into the Y (brightness) signal, which is inputted to one terminal of the digital comparator 23. The digital comparator 23 inputs a comparison level signal from a comparison level setting circuit 22 and compares the both with each other to generate the one-bit character and graphic data, which are inputted to a character and graphic memory 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data conversion circuit of a still image system for processing character and graphic information input by a still image input device.

[0002]

2. Description of the Related Art Conventionally, in a still image system, character and graphic data to be edited into image data is provided with a character generator inside or outside the still image system.
The character and graphic data generated by this character generator has been transferred to the character and graphic memory in the still image system for use.

[0003]

As described above, since the dedicated character generator is provided inside or outside the still image system, only character and graphic data that can be generated by the character generator can be handled and used. There was a problem that the range was limited.

It is an object of the present invention to provide a character or figure which can be input and processed in a state of an arbitrary shape and an arbitrary size without using a character generator.

[0005]

According to the present invention, a digital image signal input from a still image input device is stored in an image memory in a still image system, and the data in the image memory is converted into digital data or converted into analog data. In the still image system, the RGB encoder for converting the character and graphic data input from the still image input device into a Y (luminance) signal in the still image system, and the converted Y (luminance) ) A character and a figure data converting circuit for converting a signal into a 1-bit character and figure data, a character and a figure data converting circuit, and a character and a figure memory for storing the data of the character and the figure data converting circuit. It is a data conversion circuit of a still image system.

[0006]

[Function] Data is input from a still image input device such as a film scanner, an image scanner, or a still image camera. When this data is image data, it is digitized into 6 to 10 bits by the still image input device, input through the interface, and stored in the image memory.

When the data is character or graphic data, it is digitized into 6 to 10 bits by a still image input device and inputted as in the case of image data. When this signal is input from the input terminal to the RGB encoder of the character / graphic data conversion circuit, it is converted into a Y (luminance) signal and input to one of the digital comparators. A comparison level signal is input to the digital comparator from the comparison level setting circuit, the two are compared, the digital comparator converts them into 1-bit character / graphic data, and the data is stored in the character / graphic memory.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 10 is a still image system, and this still image system 1
A still image input device 11 and a recording / reproducing device 12 are connected to the input side of 0 through an interface 14, and
A monitor TV 13 is connected to the output side.

An image memory 15 is connected to the interface 14, and the image memory 15 is connected to a D / A conversion circuit 18. Further, the interface 14 includes a character / graphic data conversion circuit 1 according to the present invention.
6 are combined, and the character / graphic data conversion circuit 16
The D / A conversion circuit 18 via the character / graphic memory 17
Is bound to. The D / A conversion circuit 18 is coupled to the monitor TV 13 via a buffer amplifier 19. The CPU 20 performs memory control and the like.

In the above structure, data is input from the still image input device 11 such as a film scanner, an image scanner, a still image camera or the like. When this data is image data, the still image input device 11
Are digitized into 6 to 10 bits, input through the interface 14, and stored in the image memory 15.
This data processing is no different than before.

When the data is character or graphic data, the static image input device 11 uses 6 to 10 like the image data.
Input in digitized form. When this signal is input from the input terminal 25 to the RGB encoder 21 of the character / graphic data conversion circuit 16, it is converted into a Y (luminance) signal and input to one of the digital comparators 23. A comparison level signal is input from the comparison level setting circuit 22 to the digital comparator 23, the two are compared, and the digital comparator 23 converts the comparison level signal into 1-bit character / figure data. Is taken into. As for the level of the comparison level setting circuit 22, the level variable signal by the external operation is the level variable signal input terminal 12
Enter from 4.

The image data of the image memory 15 and the characters and the characters and graphic data of the graphic memory 17 can be independently displayed on the monitor TV 13 or can be displayed on the monitor TV 13.
Is displayed on the monitor TV 13 after being combined on the on-screen or further edited in the still image system 10. Further, the image data in the image memory 15 and the characters and the characters and graphic data in the graphic memory 17 are sent to the recording / reproducing device 12 to be recorded / reproduced independently or in combination.

Although the digital method is shown in FIG. 1, an analog method can also be used. In this case, as shown in FIG. 2, the D / A conversion circuit 26 may be provided in the subsequent stage of the RGB encoder 21, and the analog comparator 27 may be used as the comparator.

Next, in the still image system 10, characters,
Assuming that a bit for colorization is prepared as the graphic data, the color data corresponding to the color arbitrarily selected by the user is stored in the character / graphic memory 17 in association with each bit of the character / graphic data. .. In particular,
If the output waveform at point a on the output side of the D / A conversion circuit 26 in FIG. 3 is (a) in FIG. 4, then at point b on the output side of the analog comparator 27, FIG. Like 01
1100 data are obtained. In order to colorize this data, 011100 is stored in the address of R arbitrarily selected from R, G, and B, for example. And G and B
Is all 0. Then, the data set to red is obtained.

[0015]

As described above, according to the present invention, an RGB encoder for converting character and graphic data input from a still image input device into a Y (luminance) signal and a converted Y (luminance) in the still image system as described above. ) Character / graphic data conversion circuit 1 including a comparator for converting a signal into 1-bit character / graphic data
6 and the character and figure memory for storing the data of this character and figure data conversion circuit,
It is possible to input not only handwritten characters and figures but also free characters and figures such as size and angle without requiring a dedicated character generator for generating characters and figures. Moreover, it has an extremely simple structure and can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data conversion circuit of a still image system according to the present invention.

FIG. 2 is a block diagram of a second embodiment of the present invention.

FIG. 3 is a block diagram of a third embodiment of the present invention.

FIG. 4 is an output waveform diagram in FIG.

[Explanation of symbols]

10 ... Still image system, 11 ... Still image input device, 12
... recording / reproducing device, 13 ... monitor TV, 14 ... interface, 15 ... image memory, 16 ... character, graphic data conversion circuit, 17 ... character, graphic memory, 18 ... D / A conversion circuit, 19 ... buffer amplifier, 20 ... CPU, 21 ... RG
B encoder, 22 ... Comparison level setting circuit, 23 ... Digital comparator, 24 ... Level variable signal input terminal, 25 ...
Input terminal, 26 ... D / A conversion circuit, 27 ... Analog comparator.

Claims (1)

[Claims] 1. A still image processing apparatus in which a digital image signal input from a still image input device is stored in an image memory in a still image system, and the data in the image memory is output as digital data or converted to analog data. In the image system, an RGB encoder that converts the character and graphic data input from the still image input device into a Y (luminance) signal in the still image system, and the converted Y (luminance)
A character and graphic data conversion circuit for converting a signal into 1-bit character and graphic data, a character and graphic data conversion circuit, and a character and a graphic memory for storing data of the character and graphic data conversion circuit. Data conversion circuit for still image system.