JPS6298891A - Picture input device - Google Patents

Abstract

PURPOSE:To remove the influence of introduced noise by providing an adjacent color sequency discriminating means for discriminating that a picture element of a color except for the colors of the first and the second priority of an original picture is adjacent to the picture element of the color of the first priority, and selecting the color of the first priority for the color of the picture element adjacent to the picture element of the color of the first priority. CONSTITUTION:Adjacent dot groups are constituted by a dot of one color, respective data in a block is divided into one belonging to the adjacent dot groups and one not belonging thereto for the dot by a belonging discriminating means 44 and a switch 45. When the data of the respective dots belongs to the adjacent dot groups, the switch 45 is brought into a connecting state as shown and the respective data is supplied directly to an FG color selecting means 33 to select the FG color. When the data of the respective dots does not belong to the adjacent dot groups, the switch 45 is brought into an opposite connecting state to the shown and the data of the respective dots is supplied to a fractionating and counting means 31 and the fractionating and counting and the color sequence are decided in said means and a succeeding color sequence deciding means 32.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem (Fig. 1) F. Effect G. Example G1 - Structure of the example (Fig. (Figure 1) G2 Operation of one embodiment (Figures 1 to 3) G3 Other embodiments (Figures 4 and 5) The present invention relates to an image input device suitable for input.

B. Summary of the Invention The present invention separately counts the colors of pixels within a block and calculates the first
and an image input device configured to select a second priority color, which is provided with a means for determining whether pixels of the same color on the original screen are adjacent to each other, and which prioritizes this over the selection of color ranking based on separate counting; By providing a means for determining that a pixel of a color is adjacent to a pixel of a first priority color, and selecting a first priority color as a color of a pixel adjacent to a pixel of a first priority color. , it is possible to display the original figure without impairing its smoothness.

C. Conventional technology Videotex can be seen as a data communication system that uses still images, and its main feature is that it uses the existing telephone network as a transmission path and uses a home television receiver as a display device. Because it enables conversational communication, it is expected to be widely used, and a captain-based service is currently being used in Japan.

First, the captain system will be explained with reference to FIGS. 6 to 11.

In the Captain System, alphanumeric characters are basically used, and the information is transmitted using a code system. As shown in FIG. 6A, the ``photographic method'' is used to faithfully represent the figure using a dot (pixel) pattern. By adopting such a hybrid method, the Captain System does not require advanced functions on the user terminal and can easily transmit complex graphics. On the other hand, since there is a large amount of information to be transmitted,
The transmission speed of the downlink from the captain center to the user terminal is 4800 bits/second.

The transmission rate of the uplink is 75 bits/second.

In addition to the above-mentioned screen display method, the Captain System also has a ``geometric function'' that allows you to draw figures using points, straight arcs, polygons, etc. as shown in Figure B (Figure C). Additionally, it supports a ``mosaic function'' that allows you to draw shapes by combining mosaic pieces.

As shown in FIG. 7, the captain system is configured with an information center, a videotex communication network (telephone network), and a user terminal device as basic elements.

There are two types of information centers: captain information centers and direct information centers DF.The information processing device CAPF of the captain information center accumulates screen information from information providers and sends it to the Videotex network. In the direct information center DF, the information provider performs all screen preparation, storage, transmission, data processing from the user terminal GT, etc.

The indirect information center IF and information input center INC register screen information with the captain center, and the storage and transmission of the information is processed by the captain center.

As shown in FIG. 8, the user terminal device GT is a modem connected to the telephone network via an input/output terminal (1).
It has a computer (CPU) (3) that interprets the image information from this modem (2), and a frame memory (4) in which the image interpreted by the computer (3) is drawn. The frame memo (January 4) image is generated by the video signal generator (5
) is displayed on the display (6).

There are five ranks of user terminal devices, and basic functions, standard functions, optional functions, etc. are defined for each rank. At the time of connection, terminal profile information indicating its type and function is sent from the terminal, and the communication processing device VcP of the Videotex network performs protocol conversion based on this terminal profile information. The basic functions of the user terminal are shown in Table 1 below.

Figure 1 Note that rank 1, 2, and 4 terminals can use home receivers, and the number of pixels on the display screen is 192 for the pupil.
The width is 248. On the other hand, high-density terminals of ranks 3 and 5 can display twice as many dots (384°496) in both height and width, but require a dedicated display.

The display surface of the display (6) is as shown in FIG.
It has a multi-frame configuration in which multiple display surfaces overlap, and basically consists of a character information frame (7C), a geometry link information frame (7G), and a photographic ink information frame (displaying text, mosaic figures, and DRC5 information). 7P), and the display priority is also in this order.

Note that the geometric information frame (7G) is a frame that uses dot unit coloring, and the text information frame (7C)
) and the photographic information frame (7P) are blocks colored frames.

Table 2 shows the information that can be expressed by the captain system.

As shown in Table 2, Figure 10, the photographic information frame (7P) has pattern surfaces (8P) in order from the front of the viewer.
P) consists of four surfaces: a foreground color (FG) surface (8F), a background color (BG) surface (8B), and a display operation surface (8D).

FG on the information of “1” in dot units on the pattern surface (8P)
The colors correspond, and the BG color corresponds to the information of “0”. FG color and BG color are patterned surface (8P) as shown in Figure 10.
FG corresponding to the 4×4 dot block (9P)
One color is designated for each block (9F) and (9B) of the surface (8F) and the BG surface (8B). FG side (
8F) and BG plane (8B) each have 4 bits, so as shown in Table 2, each has 16 colors (8 colors and 2 bits as standard).
It is possible to specify the color (gradation).

FIG. 11 shows an example of the configuration of the image information input terminal device of the captain system.

In FIG. 11, a TV camera (12) is connected to a common bus (11) connected to a processor 00) via a general-purpose interface (3), and graphic information is created by the camera input, and the image memory The information is stored in the section (14) and displayed on the television receiver (16) by the display control section (15). A keyboard control unit (1) is connected to the common bus (11).
A keyboard (18) is connected through the computer 7), and this keyboard (8) is used to modify and color pattern figures, as well as perform various control operations.

In addition, the main storage section (19) and flexible disk (2
0) is connected to the common bus (11) directly or via the control unit (21). Furthermore, a line control section (22)
The common bus (11) and the line (23) are connected via, and signals are sent/received.

Next, block coloring processing of a conventional image input device will be described with reference to FIGS. 12 to 14.

When inputting camera-input graphic information as described above, one block (4 x 4 dots) is captured as it is captured in dot units.
There are many cases where there are three or more colors within.

As mentioned above, in the captain system, FG color and BG color
Since only one color is selected for each color, the third and subsequent colors must be converted into one of FC, color, and BG color.

Therefore, conventionally, majority priority processing as described below has been performed. That is, the functional block diagram of FIG. 12 and the functional block diagram of FIG.
As shown in the flowchart in the figure, one block of image data from the input terminal IN is counted for each color in the separate counting means (31) (step ■), and then in the color order determining means (32), Each color is ranked in descending order of the number of dots (step ■). Then, from the first output terminal (32a) of the color order determining means (32), the data of each dot of the first ranking color is supplied to the FG color selection means (33) and is set as the FG color (step ■) The data of each dot of the second ranking color is supplied from the second output terminal (32b'') to the BG color selection means (34) and is set as the BG color (step ■). The data of the dots with the ranking colors are sent to the third output terminal (32c).
The color is supplied to the FG color selection means (33) and determined as the FG color (step 2).

In the above-mentioned majority priority processing, a part of the original screen information taken into the image memory unit (14) of the input device as shown in FIG. 11 may be as shown in FIG. 14A, for example. In other words, referring to Figure C, a part of the object on the screen is represented by 6 pink dots and 4 yellow dots at the bottom right of the block, including the diagonal line from the top right to the bottom left. At the same time, part of the background is displayed at the top left of the block.
In a case where the color is represented by 3 blue dots adjacent to each other vertically and horizontally, 6 dots of pink and 4 dots of yellow are determined to be the first and second rankings, respectively, and the 3 dots of blue and the 3 dots of the border The black color ranks third. Therefore, by majority priority processing, each of the three dots of blue and black are converted to pink, which is the first order, and the block after processing has a diagonal line from the upper right to the lower left, as shown in Figure 14B. The entire upper left part, including the upper left part, is pink. Moreover, the lower right part is the same as before processing.

D Problems to be Solved by the Invention However, in the majority priority processing as described above, in the original screen information as shown in FIG. The area up to the point is converted to the same pink color as the object.

In addition, in the case of camera input type, noise other than the original figure information may be mixed in due to quantization, optical reflection, etc.
In the screen after processing, as shown in Figure B, the image of the block is emphasized, and the smoothness of the figures on the original screen is impaired.

In view of the above, an object of the present invention is to provide an image input device that can eliminate kVi of mixed noise without impairing the smoothness of figures on the original screen.

E. Means for Solving Problems The present invention provides a separate counting means for separating and counting pixels of the same color on an original screen for each block composed of pixels in multiple rows and columns, and a separate counting means for separating and counting pixels of the same color on an original screen. An image input device comprising a color order determining means for determining the order of colors of pixels on an original screen for each block based on a counting result, and for selecting first and second priority colors for each block, An inter-color pixel adjacency determining means for determining whether pixels of the same color on the original screen are adjacent is provided for each block, and this same color pixel adjacent determining means is given priority over the color order determining means. Adjacent color order determining means is provided for determining that a pixel of a color other than the second priority color is adjacent to a pixel of the first priority color, and a pixel adjacent to the pixel of the first priority color is provided. This is an image input device in which a color with a first priority is selected as a color.

F According to the configuration that increases the effect, the smoothness of the figures on the original screen is not impaired and the figures are displayed in more detail.

G. Embodiment Hereinafter, an embodiment of the image input device according to the present invention will be described with reference to FIGS. 1 to 3.

Structure of G1 Embodiment FIG. 1 shows a functional block diagram of an embodiment of the present invention. In FIG. 1, parts corresponding to those in FIG. 12 are designated by the same reference numerals, and redundant explanation will be omitted.

In FIG. 1, (41) is same color dot adjacency determining means, and switches (42) and (43) are controlled by the output of this determining means (41). Data from the input terminal IN is commonly supplied to the same color dot adjacency determining means (41) and the movable contact (42c) of the first switch (42). The positive side fixed contact (42y) of the first switch (42)
) is connected to the movable contact (43c) of the second switch (43), and the first and second switch (42) and (4
The negative side fixed contacts (42n) and (43n) of 3) are both connected to the input side of the separate counting means (31).

(44) is an adjacent dot group affiliation determining means, and a third switch (45) is controlled by the output of this determining means IR (44). The data from the positive side fixed contact (43y) of the second switch (43) is transmitted to the adjacent dot group belonging determination means (44) and the movable contact (45) of the third switch (45).
c) are commonly supplied. The positive side fixed contact (45y) of the switch (45) is connected to the input side of the FG color selection means (33), and the negative side fixed contact (45n) is connected to the input side of the separation counting means (31). .

The fourth and fifth switches (46) and (47), together with the second switch (43), are connected to the same color dot adjacency determining means (41).
) is controlled by the output of The first color ranking determining means (32)
and second output terminals (32a) and (32b) are connected to movable contacts (46c) and (47c) of fourth and fifth switches (46) and (47), respectively. The negative side fixed contact (46n) of the switch (46) is FG
It is connected to the input side of the color selection means (33) and the switch (4
6) positive side fixed contact (46y) and switch (47y)
) are both connected to the input side of the BG color selection means (34).

(48) is an adjacent color order determining means, and the sixth switch (49) is controlled by the output of this determining means (48). The third output terminal (32c) of the color ranking determining means (32)
) is the positive side fixed contact (47y) of the fifth switch (47)
), the movable contact (49c) of the sixth switch (49)
) and the input side of the adjacent color order determining means (48). The positive side fixed contact of the sixth switch (49) (
49y) and the negative fixed contact (49n) are respectively connected to the input sides of the FG color selection means (33) and the BG color selection means (34).

Operation of the G2 Embodiment Next, the operation of the adjacent priority processing of this embodiment will be explained with reference to FIGS. 2 and 3.

When image data is input, same color dot adjacency determining means (
In step 41), it is determined whether two or more dots of the same color are adjacent to each other in the vertical or horizontal direction (step ■), and if the dots of the same color are adjacent to each other, it is determined whether the color of the adjacent dot group is one color or not. It is determined (step @), l
/If the i-contact dot group is of one color, the adjacent dot group affiliation determination means (44) determines whether each data belongs to the adjacent dot group of one color (step 0).

If the dots of the same color are not adjacent, switch (42)
The connection state is opposite to that shown in the diagram, and the color of the adjacent dot group is changed to 2.
If there are more than one color, the switch (43) is connected in the opposite way to the one shown in the figure, and the input image data is supplied to the separate counting means (31) in block units, and the color ranking determination means (31) and the subsequent color ranking are determined. In the means (32) a separate count and color ranking determination is made (step 0). In this case, the fourth and fifth switches (46) and (47) are in the reverse connection state as shown in the figure, and the first and second switches of the color order determining means (32)
The first and second priority data are output from the output terminals (32a) and (32b) of the FG color selection means (33).
) and BG color selection means (34), respectively.
FG color and BG color are selected (steps [phase], [phase]).

As shown in FIG. 3A (same as FIG. 14A), when a group of adjacent dots is composed of dots of one color, each dot in the block is The data is divided dot by dot into those that belong to the adjacent dot group and those that do not. When the data of each dot belongs to the adjacent dot group (blue in the example of FIG. 3A), the switch (45) is in the connected state shown, and each data
The color is directly supplied to the G color selection means (33) and the FG color is selected (Step 2). Further, when the data of each dot does not yield to the adjacent dot group, the sui-sochi (45) is in a connected state opposite to that shown in the figure, and the data of each dot is supplied to the separate counting means (31), 31) and the subsequent color ranking determining means (32) performs separate counting and color ranking determination (step O). When the adjacent dot group is composed of dots of one color, the fourth and fifth switches (4
6) and (47) are in the connected state shown, the output from the first output terminal (32a) of the color order determining means [2 (32) is supplied to the BG color selection means (34), The data of the largest number of dots (pink in the example of Figure 3A) that does not belong to the dot group is selected as the BG color (step @
).

The data of the third and lower color dots that were not selected as FG or BG colors in the above processing process are directly output from the third output terminal (32c) of the color ranking determining means (32) or sent to the second output terminal (32c). From the output terminal (32b) to the switch (4
7) movable contact (47c) and positive side fixed contact (47
y), adjacent color rank discriminator) IIW (413)
It is determined whether the dot is adjacent to the FG color dot above, below, or to the left or right. When the dot is adjacent to the blue dot selected as the FG color, such as the black dot in FIG.
and is converted into an FG color (blue in the example of FIG. 3A). In addition, when the dot is not adjacent to the FG color dot, such as a yellow dot, the switch (49) is in the opposite connection state as shown in the figure, and the data of the yellow dot is transferred to the BG color selection means (34).
) and is converted to BG color (pink in the example of FIG. 3A).

By the above-described adjacent priority processing, the original screen information as shown in FIG. 3A, which has been taken into the image memory section (14) of the input device, is converted as shown in FIG. 3B.

In other words, the blue 3 dots 7 adjacent to the upper left of the block is F.
The G color is selected, and the pink color of the 6 dots at the bottom right is selected as the BG color. Further, the three black dots adjacent to the blue dot are converted to blue, which is the FG color, and the four yellow dots, which are not adjacent to the source color dots, are converted to pink, which is the BG color.

In this embodiment, by preferentially selecting a group of adjacent dots, it is possible to display on the display without impairing the smoothness of the figure on the original screen, even though it is a block coloring method.

Further, for a pixel in which noise is mixed, correlation with adjacent dots is determined, and the influence of noise can be eliminated.

G3 Other Embodiments Next, other embodiments of the image input device according to the present invention will be described with reference to FIGS. 4 and 5.

A functional block diagram of another embodiment of the present invention is shown in FIG.

In FIG. 4, parts corresponding to those in FIG. 1 and FIG. 12 are given the same reference numerals, and redundant explanation will be omitted.

In FIG. 4, (51) is a priority processing determination means, and 7. Eighth and ninth switches (52).

(53) and (54) are controlled by the output of this discriminator 1d (51). Data from the input terminal IN is commonly supplied to the priority processing determining means (51) and the movable contact (52c) of the seventh switch (52). The negative side fixed contact (52n) of the switch (52) is connected to the input side of the same color dot adjacency determining means (41) and the movable contact (42c) of the first switch (42). Positive side fixed contacts (52y) and (53y) of switches (52) and (53)
) are connected to each other, and the negative fixed contact (53n) of the eighth switch (53) is connected to the first to third switches (42).
), (43> and (45) each negative side fixed contact (
42n), (43n) and (45n), and the movable contact (53c) of the switch (53) is connected to the input side of the differential counting means (31). The movable contact (54c) of the ninth switch (54) is connected to the third output terminal (32c) of the color ranking determining means (32),
The positive fixed contact (54y) of the switch (54) is connected to the input side of the FG color selection means (33) together with the positive fixed contact (49y) of the sixth switch (49).

The negative side fixed contact (54n) of the switch (54), together with the positive side fixed contact (47y) of the fifth switch (47), is connected to the input side of the adjacent color order determining means (48) and the sixth switch (49). is connected to the movable contact (49c). The rest of the configuration is the same as that shown in FIG. 1 above.

This embodiment operates as follows.

In the image input terminal device shown in FIG. 11, as described above, pattern figures are modified and colored using the keyboard (18). At the same time, an area to be colored by the majority priority process and an area to be colored by the adjacent priority process are specified using a keyboard or a light pen (not shown) in accordance with the design of the pattern figure.

When image data is input, priority processing determining means (51)
At , it is determined whether the data is designated for majority priority processing (step 2).

For majority priority processing, switch (52), (53
) and (54) are connected as shown. The input image data is supplied to the separation counting means (31) via switches (52) and (53), and the output from the third output terminal (32c) of the color ranking determining means (32) is supplied to the FC color selector 11. (
33). In this case, since there is no data input to the same color dot adjacency determining means (41), the fourth and fifth switches (46) and (47) are in the reverse connection state than shown in the figure, and the color order determining means (32) The outputs of the first and second output terminals (32a) and (32b) of F
It is supplied to the G color selection means (33) and the BG color selection means (34). In this way, this embodiment is in the same connection state as in FIG. 12, and the majority priority processing is performed according to the flowchart in FIG. 13 (step [phase]).

In the case of adjacent priority processing, switches (52), (53
) and (54) are in the opposite connection state from that shown. The image data subjected to discrimination processing by the same color dot adjacency discriminating means (41) is supplied to the separate counting means (31), and the output from the third output terminal (32c) of the color rank determining means (32) is determined as the adjacent color rank. The information is supplied to the determining means (48). In this way, this embodiment has the same structure as the embodiment shown in FIG. 1 described above, and the adjacent priority processing is performed according to the flowchart shown in FIG. 2 (steps).

According to this embodiment, similar to the embodiment shown in FIG. 1, it is possible to display figures on the original screen without impairing their smoothness, and it is also possible to display figures that are not suitable for adjacent priority processing, such as meshes, hatchings, or bright spots. The symbols can be faithfully displayed on the original screen by majority priority processing.

(Effects of the Invention As detailed above, according to the present invention, it is possible to display more precisely without impairing the smoothness of figures on the original screen, and it is also possible to eliminate the influence of mixed noise. Thus, an image input device that can input images is obtained.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of an embodiment of an image input device according to the present invention, FIGS. 2 and 3 are flowcharts and diagrams for explaining the operation of the embodiment of FIG. 1, and FIG. The figure is a functional block diagram showing the configuration of another embodiment of the present invention, FIG. 5 is a flowchart for explaining the operation of the embodiment of FIG. 4, and FIG.
7 are line diagrams and block diagrams for explaining the present invention, FIGS. 8 to 10 are block diagrams and conceptual diagrams showing the configuration of a user terminal and its display screen, and FIG. 11 is an image input terminal. FIG. 12 is a functional block diagram showing the configuration of a conventional image input device; FIGS. 13 and 14 are flowcharts and lines for explaining the operation of the conventional device shown in FIG. 12. It is a diagram. (31) is a separate counting means, (32) is a color ranking determining means,
(41) is same color pixel adjacency determining means, and (48) is adjacent color rank determining means. Go to 2, /', enter □

Claims (1)

[Claims] For each block composed of pixels in multiple rows and columns,
a separate counting means for separating and counting pixels of the same color on the original screen;
color ranking determining means for determining the ranking of colors of pixels of the original screen for each block based on the classification results of the classification counting means, and selecting colors of first and second priority for each block. In the image input device, a same color pixel adjacency determining means is provided for determining whether pixels of the same color in the original screen are adjacent for each block, and the same color pixel adjacency determining means has priority over the color order determining means. and an adjacent color order determining means for determining that a pixel of a color other than the first and second priority colors of the original screen is adjacent to a pixel of a color of the first priority order, An image input device characterized in that the color of the first priority is selected as the color of a pixel adjacent to the pixel of the color of the first priority.