JPH02292627A - Picture reader - Google Patents

Abstract

PURPOSE:To easily, precisely and visually instruct the target part of a display picture content by installing a picture read means, a picture memory and a character generation means and overlapping a character signal with picture data so as to turn it into a display signal. CONSTITUTION:An output from the line sensor LS of a picture read head 2 is stored in the picture memory 8 through an amplifier 5, an A/D converter 6 and a line buffer 7. Then, respective original color picture data are read from the memory 8, and are transmitted to an overlapping circuit 12 through a D/A converter 11. A character display signal from the character generation circuit 30 is supplied to the circuit 12, is overlapped with a read picture signal from the memory 8, is outputted and is transmitted to a color CRT monitor 14 and the like. CPU 22 controls a pointer mark generation function part 30a in the circuit 30 in accordance with a key input, forms a pointer mark, transmits it to the circuit 12, overlaps it with the picture signal and displays it on a screen. Thus, the arbitral part of picture data can be instructed, and the target part of the display picture content can easily, precisely and visually be instructed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device that displays image data read by an image reading device on a display device such as a CRT (cathode ray tube).

[Summary of the invention]

The present invention captures image data read from an image original by an image reading means into an image memory, and outputs a character from a character generating means that generates a character having the shape of an indicator on the image data read from the image memory. This is an image reading device that superimposes signals to produce a display signal, and can point to any part of image data displayed on a display means with a character having the shape of the above-mentioned indicator, a so-called pointer.

[Prior art] Conventional image reading devices scan original images using COD.
A scanner device is known that outputs digital image data obtained by reading with an image sensor such as a solid-state image sensor (solid-state image sensor) via a digital interface such as CPIB, but this read image is visually expressed. Shape 7
In order to output (print out, display on a monitor, etc.) in a normal state, it is generally necessary to use a computer device, etc., which results in a large-scale system, and the signal processing device requires time, resulting in poor responsiveness. Relatively bad. For this reason, conventional image reading devices such as scanner devices are unsuitable for use in presentations at exhibitions, lectures, etc., for example.

Therefore, the applicant reads the image original, stores it in an image memory, and repeatedly reads it from the image memory in synchronization with the horizontal scanning signal and vertical scanning signal of the video signal, and outputs it as a video signal for displaying a still image. We are proposing an image reading device that does this.

[Problem to be solved by the invention]

By the way, in the above-mentioned presentations, etc., it is often necessary to give an explanation while focusing attention on a desired part of the displayed image, but it is not possible to accurately indicate the desired part with only verbal explanations, and some visual It is desired to develop an image reading device that can give instructions.

The present invention is based on the above-mentioned 5. The object of the present invention is to provide an image reading device that can easily and accurately visually indicate a desired portion of displayed image content.

[Means for Solving the Problems] As shown in FIG. 1, an image reading device according to the present invention includes an image reading head 2 which is an image reading means for reading an image, and an image reading head 2 which is the image reading means. and a character generating means 30 that generates a character having the shape of an indicator (for example, the shape of an arrow, a shape of a finger pointing, etc.) indicating an arbitrary part on the image. However, the above-mentioned problem is solved by superimposing the character signal outputted from the character generating means 30 on the image data read from the image memory 8 to generate a display signal.

[For production]

The image data read by the image reading head 2 is recorded in 1a.
By superimposing the character display signal of the pointer shape character from the character generation stage 30 on the image data read out from the image memory 8, which is displayed, the character display signal of the indicator shape character is superimposed on the image data read out from the image memory 8. The indicator-shaped character can be displayed on the screen, and a desired portion on the display screen can be visually indicated.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of an image reading device according to the present invention.

In the image reading device shown in FIG. 1, the original i!
The image reading head 2 that reads the image original GD placed on the 21 unit 1 is provided with a light aS, a multi-lens array 4, and a CCD line sensor LS, and the light source 3 illuminates the image original CD and reads the image. Reflected light from the original CD is received by the line sensor LS via the multi-lens array 4. This line sensor LS is
For example, 1,728 CCD light-receiving cells are arranged in a straight line.
By sequentially emitting light corresponding to B, color 3
It is assumed that primary color image signals can be obtained line-sequentially (line-sequentially). The output from the line sensor LS of the image reading head 2 is amplified by the amplifier 5 and sent to the A/
It is sent to the D converter 6 and converted into digital image data,
The timing is adjusted by a line controller 7 such as a so-called FIFO, and then stored in an image memory 8 such as a RAM (random access memory) or a dual port memory. Here, the light sensor LS, A/D converter 6
The operation of the line buffer 7 is controlled by a timing control signal from a read timing control circuit 9, and the image memory 8 is controlled for writing/reading by a control signal from a memory control circuit 10.

From the image memo υ8, each primary color image data corresponding to color R, G, and B is read out and sent to the D/A converter 11, and this D/A converter 1l converts the data into analog R, G, and R, respectively.
, B image signals and sent to the superimposition circuit 12. This superimposition circuit 12 is supplied with a character display signal from a character generation circuit 30, and this character display signal is superimposed on the memory read image signal and output. The character generation circuit 30 generally outputs a character pattern display signal such as a character pattern or a number pattern, but in this embodiment, it outputs at least an indicator for indicating an arbitrary part on the display screen. It outputs a display signal of a character (pointer mark) having a shape, and this is illustrated as, for example, a pointer mark generation function section 30a.

Such character display signals are superimposed and sent to superimposition circuit 1.
The R, G, B image signals output from 2 are output terminal 13.
R, 13G, 13B, color CRT
The signal is sent to a display device such as a (cathode ray tube) monitor 14. Note that the R. G. The B signal is sent to a Y (luminance) matrix circuit 15 and a C (chroma) signal matrix circuit 16, respectively, and the Y and C signals from these matrix circuits 15- and 16 are respectively sent to output terminals 13Y and 13C. is retrieved via. Further, these Y signal and C signal are mixed in a mixing circuit 17 to become a so-called composite video signal Sv,
It is taken out via the output terminal 13V.

Next, the read timing control circuit 9 and the memory control circuit IO are controlled by a system control circuit (so-called system controller) 21, and this system control circuit 21 sends and receives data and control signals to and from the CPU 22. be exposed. This system control circuit 21 and CPU 2
2 may be an integral structure.

The key human power device 23 supplies key human power signals to the CPtJ2 2, for example, to generate or move the pointer mark as described above, or to change the display color or pattern shape of the pointer mark. be. C.P.
The U22 controls the pointer mark generation function section 30a in the character generation circuit 30 that generates pointer marks according to the key input, and generates a pointer mark having the shape of an indicator into one or more character patterns. The pointer mark pattern display signal from the pointer mark generation function unit 30a is sent to the superimposition circuit 12 and superimposed on the image signal.

Note that the system control circuit 21 outputs a horizontal synchronization signal HD.
, vertical synchronization signal VD and a composite synchronization signal SYNC which is a mixture of these are output terminals 18H and 18V, respectively.
．． 183.

Here, the character generation circuit 30 (or CRT
The controller (controller) is provided, for example, to display functions related to various operations of the image reading device in characters, and is equipped with a character pattern ROM, etc. in which alphabetic character patterns, numeric patterns, symbol patterns, etc. are stored. However, as the pointer mark generation function, a pattern for forming a pointer mark may be stored in a part of this character pattern ROM.

That is, in this embodiment, in addition to the general character patterns such as alphabetic letters and numbers, a character pattern forming a pointer mark is written in advance in a character ROM or the like in the pointer mark generation circuit 30.
By reading these character patterns and forming pointer marks and displaying them on the screen, it is possible to point to any part of the image data.

FIGS. 3 and 4 show examples of specific shapes of the pointer marks.

FIG. 3 shows an arrow-shaped pointer mark 31 formed by two character patterns, a character pattern 31a forming an upper part and a character pattern 32a forming a lower part, and FIG. This shows that a pointer mark 41 in the shape of a hand and finger formed by a character pattern is indicated with display position accuracy in units of one character.

Such a pointer mark is displayed on a character display table 50 shown in FIG.

This display table 50 is used when the pointer mark display signal is superimposed and displayed on the display screen as described above.
For example, a display table 50 consisting of 128 characters in total, 16 characters in the horizontal direction and 8 characters in the vertical direction, is displayed at a predetermined position on the display screen SC. Normally, various functions of the image reading device are displayed by sequentially arranging character patterns such as alphanumeric characters and numbers in predetermined display allocation positions on this character display table 50, but pointer marks are also displayed in the same way. Screen S
What is necessary is to display it at the display allocation position of the store in the display table 50 on C.

That is, for example, any part you want to specify is on the display screen SC.
If it is located at the upper left of the top, the pointer mark 55 may be displayed at the display allocation position of the upper left portion of the display table 50, and the desired portion within the display image can be displayed.

By displaying the above-mentioned Boink mark at the display allocation position of an arbitrary note in the display table 50, it is possible to freely indicate any part within the display image (with positional accuracy of one character unit). , the pointer mark may be moved by moving the position of the display table 50 itself on the display surface SC.

In this case, the display table 50 on the display screen SC in FIG.
Display position, for example, the χ1 Y coordinate of the upper left corner (χ+, y+
) can be changed by the pointer mark generation circuit 30, by changing the digit on the display screen SC of the display table 50, the digits displayed in the display table 50 can be changed accordingly. The existing Boink mark will move. Therefore, by moving the pointer mark character by character within the display table 50,
Furthermore, by moving the display table 50, it is possible to specify a desired portion within the displayed image in even more detail. This change in the display position of the display table 50 itself is as follows:
This can be realized by controlling the read timing of the display table 50 with respect to the horizontal and vertical synchronization signals.

In this embodiment, one character pattern has 12 dots horizontally and 16 dots vertically, and 16 horizontal characters have 192 dots. The character display table 50 is made up of 8 characters vertically and 256 donts. One dot in the horizontal direction of the character pattern is read out at a 5 KHz clock, and one dot in the dark blue direction corresponds to one line (scanning line) on the display screen SC of the CRT monitor 14.

Therefore, the entire surface of the display screen SC is approximately 250 mm wide (
5 KHz clock) and 480 dots (480 lines on the vertical display screen), and within this display screen SC, the above 192 dots x 256 dots display table 50
is displayed in a movable manner.

The arrow-shaped pointer mark 31 shown in FIG. 3 and the finger-shaped pointer mark 41 shown in FIG. It is possible and
For example, if the pointer mark 31 shown in FIG. 3 is initially displayed in the display color, the display color changes from black to red, green, yellow, blue, etc. each time the suinochi is pressed. Magenta. cyan. When the display color changes from white to cough white, the pointer mark 31 changes to a finger-shaped pointer mark 41 shown in FIG. After switching to yellow, blue, magenta cyan, and white in this order, the shape returns to the arrow-shaped pointer mark 31, and the display color repeats from black again. Therefore, the user can select any shape of pointer mark and the display color of the pointer mark. In this way, the above pointer mark is a switch. It can be moved using a mouse, joystick, etc., and the display color and shape can be changed. For example, by displaying a pointer mark according to the content of the explanation, visual expression is possible, making it extremely useful for presentations etc. Effective.

Here, the pointer marks stored in advance in the character ROM in the pointer mark generation circuit 30 are not limited to the shapes of the marks 31 and 41, and for example, these pointer marks 31 and 41 indicate the upper left direction. For example, character patterns indicating four directions including upper right, lower right, and lower left may be stored, or character patterns indicating four directions such as upper, lower, left, and right may be stored. Character patterns each indicating a total of eight directions including the above may be stored in the character ROM.

Next, as another example, the above-mentioned upper right, lower right, upper left. When using the four pointer marks pointing in the four directions at the bottom left, the display area of the display table 50 is divided into four areas 22.23, 24.25 as shown in FIG. When displaying pointer marks, the four pointer marks may be switched for each area to point to any part of the image data. for example,
The upper left quadrant 22 has a pointer mark pointing to the upper left, the upper right quadrant 23 has a pointer mark pointing to the upper right, and the lower right quadrant 24 has a pointer mark pointing to the lower right. In addition, in the lower left quadrant 22, the display table 50 is displayed by switching the pointer marks indicating the lower left direction.
You can specify all four corners of the room. This is the display screen SC
The interior may be divided into four areas and the pointing direction of the pointer mark may be switched and displayed for each area.

Note that the present invention is not limited to the above-described embodiments; for example, in addition to a configuration using a general character generator as a character generation means for generating a pointer mark display signal, pointer mark patterns may also be used. The display position of the pointer mark pattern on the display screen SC may be moved by using a pattern generation ROM that stores the pattern generation ROM and changing the pattern readout timing from the ROM with respect to horizontal and vertical synchronization. In addition, although the specific shapes of the pointer mark are an arrow shape and a finger shape, the pointer mark may have any shape such as a triangle. Further, the type of display color of the pointer mark, the order in which the display colors are switched, etc. are not limited to the above-mentioned embodiments, but can of course be changed.

[Effects of the Invention] According to the image reading device of the present invention, by displaying a character having the shape of an indicator, a so-called pointer mark, at an arbitrary position on the display screen, the desired display image on the display screen can be displayed. You can specify the part.

Also, the pointer mark above is a Swiss mouse. It can be moved using a joystick or the like, and the display color and shape can be changed. For example, by displaying a pointer mark according to the content of the explanation, visual expression is possible, which is effective for use in presentations and the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an image reading device according to the invention; FIG. 2 is a schematic front view showing a specific example of the display format of a display table and pointer mark on a display screen;
FIGS. 3 and 4 are schematic plan views showing an example of the configuration of a punch mark based on a character pattern. 1...Document placement table 2...Image reading hand 8...
...Image memory 9...Reading timing control circuit 10.
. . . Memory control circuit 12 . . . Superposition circuit 14, .・．． ．． ．． CRT (cathode ray tube) monitor 21...
... System control circuit 22 ... CPU 23 ... Key human power device 30 ... Character generation circuit 30a ... Pointer mark generation circuit 50 ...
・Display table

Claims (1)

[Scope of Claims] An image reading means for reading an image; an image memory for capturing image data read by the image reading means; and a character for generating a character having the shape of an indicator indicating an arbitrary part on the document. 1. An image reading device comprising: a generating means, wherein a character signal output from the character generating means is superimposed on the image data read from the image memory to generate a signal for display.