JPH02292628A - Picture reader - Google Patents

Abstract

PURPOSE:To prevent the deviation of a position relation with a picture content as to characters having positional relevance with the picture content of a pointer mark and the like even if the picture content is scrawl-displayed by installing a character generation means and the like. CONSTITUTION:An output from the line sensor LS of a picture read head 2 is stored in a picture memory 8 through an amplifier 5 and the like. Then, picture data which is read from the memory 8 is transmitted to an overlapping circuit 12 through a D/A converter 11. A character display signal showing the pointer mark and a trimming frame is supplied from the character generation circuit 30 to the circuit 12 and the signal is overlapped with a picture signal so as to be transmitted to a color CRT monitor 14 and the like. Then, a display position on a screen as to the characters having positional relevance with respect to the display picture content, the pointer mark, the trimming frame and the like, for example, is interlocked and moved through CPU 22 and a system control circuit at the time of a scrawl action. Thus, the deviation of the position relation with the picture content can be prevented in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides an eight-image reading system for outputting image data read by an image reading means as a display signal to a CR"r (cathode ray tube) display means, etc. Regarding equipment.

[Summary of the invention]

The present invention writes image data read from an image original by an image reading means into an image memory, superimposes character display signals such as letters and figures on the image data read from the image memory, and outputs it as a signal for display. This is an image reading device that performs so-called scroll display by moving the data read area from the image memory, and by moving the display position of the character in conjunction with the scroll display, the display image content can be changed by scrolling. This prevents the character display position from shifting.

[Prior Art] As a conventional image reading device, there is a known scanner device that reads an image document using an image sensor such as a CCD and outputs the obtained digital image data through a digital interface such as CPIB. However, in order to output this read image in the form of visual expression (print out, display on a monitor, etc.), it is necessary to use a computer device, etc., making it a large-scale system. Also, since signal processing takes time, the response is relatively poor. 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 of this application reads an 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, thereby outputting 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 an image reading device that directly outputs a video signal, it is possible to set the capacity of the image memory to be larger than the display range and move the readout area from the image memory. It has been considered to perform a so-called scroll display.

For example, as shown in FIG. 5, this is the image original J,! stored in the image memory. jGD (image data) is displayed on the display screen SC of the monitor receiver MD by moving up and down the memory readout area RA corresponding to the display range in the display ilsc of the monitor receiver aMD in FIG. The image content appears to move up and down. In this case, it is written in the image memory above. Image original C that has been α
When the memory readout area RA is moved in the upward direction Y with respect to D, the displayed image content moves (scrolls down) in the downward direction Y on the display screen SC in FIG.

In addition, for example, during presentations, it is convenient to be able to display pointer marks such as arrows and point to a desired location in the image. It has been proposed to superimpose the image data on the image data read from the memory and output it as a display signal.

However, if only the display content of the memory read image is scrolled during the scroll display, the location indicated by the pointer mark will be misaligned with respect to the display image content, which is undesirable. In addition, -S has a character that has a positional relationship to the image content,
For example, it is also undesirable if the corresponding positional relationship of the trimming frame etc. shifts during the above-mentioned scrolling.

The present invention has been made in view of these points, and even when the image content is scrolled, the position of the character, such as a pointer mark, etc., that has a positional relationship with the image content is changed. An object of the present invention is to provide an image reading device that does not cause any misalignment.

[Means for Solving the Problems] As shown in FIG. 1, the image reading device according to the present invention includes an image reading head 2 which is an image reading means for reading an image original GD, and an iT+i read by the image reading means. It has an image memory 8 that takes in an image data, and a character generation means (for example, a character generation circuit 30) that outputs a character display signal. Scroll display is performed by moving the readout area of the image data read out from the image memory 8, and a character display signal output from the character generation means is superimposed on the image data read out from the image memory 8 by the superimposition circuit 12 for display. and control the movement of the display position of the character display signal from the character generation means in accordance with the movement of the readout area of the image data for the scroll display, thereby changing the display position of the character with respect to the displayed image. It is something.

[For production]

When scroll display is performed by moving the readout range of image data stored in the image memory 8, the display position of the character display signal from the character generation circuit 30 is moved in accordance with the movement of the readout range, and the displayed image By controlling the display position of the character so as to make it lose once, it is possible to prevent the positional correspondence between the displayed image and the character from shifting during the scrolling.

〔Example〕

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

In the image reading apparatus shown in FIG.
A CD line sensor LS is provided, a light source 3 illuminates the image original CD, and reflected light from the image original CD is received by the line sensor LS via a multi-lens array 4. This line sensor LS is configured by, for example, 1728 CCD light receiving cells arranged in a straight line. It is assumed that by sequentially emitting light corresponding to H, image signals of three primary colors can be obtained line-sequentially (line-sequentially). The outputs from the line sensors I and S of the image reading driver 2 are amplified by the amplifier 5, sent to the A/D converter 2K6 and converted into digital image data, and the timing is adjusted by a line buffer 7 such as a so-called FIFO. For example, I'? The image is stored in an image memory 8 such as AM (random access memory) or dual port memory. Here, the line sensor LS, A/D converter 6, and line huffer 7 are based on the reading timing system. 1
Timing system from 1 circuit 9? The operation of the image memory 8 is controlled by the ffD signal, and the image memory 8 is controlled by the memory control circuit 10. Writing/reading is controlled by the 11 signal.

From the image memory 8, color R, G. Each primary color image data corresponding to B is read out and sent to the D/A converter 11, and this D/A converter 1l converts analog R, G, respectively.
, B image signals and sent to the superimposition circuit 12. This superimposition circuit 12 is supplied with a character display signal for displaying the pointer mark, trimming frame, etc., and this character display signal is superimposed on the image signal and output. The R, G, and B image signals from the superimposing circuit 12 are taken out via output terminals +3R, 13G, and 13I3, and sent to a display device such as a color CRT (cathode ray tube) monitor 14. Note that the R, G, and B signals from the superimposing circuit l2 are sent to a Y (luminance) signal matrix circuit l5.
and C (chroma) signal matrix circuit 16, and the Y and C signals from these matrix circuits 15 and 16 are taken out via output terminals 13Y and 13C, respectively. Furthermore, these Y and C signals are minxed by a mixing circuit 17 to become a so-called composite video signal Sv, which is taken out via an output terminal 13.

Next, the read timing control circuit 9 and the memory system? The 1B circuit IO is 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. This system control circuit 2l and C
It may be configured integrally with the PU22. The key human power device 23 provides keys for scrolling the contents of the displayed image as described above, displaying a pointer mark for indicating an arbitrary location within the displayed image, and determining the image reading range, for example. A human input signal is supplied to the CPU 22.

Here, the image memory 8 has a memory capacity wider than the display range of the CRT monitor 14, etc.
For the image data of the image original GD stored in the memory 8 as shown in the figure, a data readout area R for displaying the image data
By moving A in the directions of arrows Yu and YD, the sixth
On the display screen SC of the monitor receiver MD (CRT monitor 14) shown in the figure, a so-called scroll display in which the displayed image content moves in the directions of arrows VD and Yu can be performed. Note that when the display data readout area RA in FIG. 5 is moved upward (in the direction of arrow Y), the display content on the display surface SC in FIG. 6 is moved downward (in the direction of arrow Yu).
so-called scroll down). This scroll display is performed when the CPL122 detects the operation of the scroll assemble/go-down key provided on the key human power device 23, and
PtJ2 2 and the system control circuit 2l control the memory control circuit lO? :[DL] This is performed by moving the data readout area RA of the image memory 8.

Further, the CPU 22 controls the character generation circuit 3 in response to key human power such as the pointer display operation and the trimming frame display operation.
0, so that, for example, a pointer mark or a trimming frame for displaying an image reading range is composed of one or more character patterns, and the character display signal from the character generation circuit 30 is sent to the superimposition circuit l2. It is superimposed on the above image signal. In this way, the CRT
After the trimming frame is displayed on the screen of the monitor 14 and its size and position are determined, when the trimming key of the key-powered device 23 is operated, the CPU 22 and the system control circuit 2l control the reading timing system '+1'J circuit 9. fffn L, 1611 is commanded to read again the determined image reading range in the image original (the range corresponding to the trimming frame 7 on both sides of the display). Here, the character generation circuit (or CRT controller) 30
is provided to display functions related to various operations of the image reading device, and is equipped with a character pattern ROM etc. in which alphabetic character patterns, numeric patterns, symbol patterns, etc. are stored. As part of this character, a pointer mark and a pattern for displaying a trimming frame are provided.

Note that the system control circuit 21 outputs a horizontal synchronization signal H.
D, vertical synchronization signal VD, and a composite synchronization signal SYNC mixed with these are output terminals 18H and 1, respectively.
It is designed to be taken out via 8V and 18S.

Here, for characters that have a positional relationship with the displayed image content, such as the pointer mark and trimming frame mentioned above, the display position on the screen is moved in conjunction with the scrolling operation, and the display The positional relationship of the character with respect to the image content is prevented from shifting. This causes the CPU 22 and the system control circuit 2l to cause the memory control circuit 10 to move the readout area RA for the image memory 8 in response to the scroll operation input from the key human power device 23, and at the same time generate -1 error. This is done by synchronously moving the display position of the character signal from the circuit 30 on the screen.

In this way, for example, (a) in FIG. (b)(c)
As shown in FIG. 2, the scrolling operation is performed without shifting the position of the pointer mark PM with respect to the displayed image content on the display surface SC. Further, as shown in FIGS. 3(a) and 3(b), the scrolling operation is performed without shifting the position of the trimming frame TF with respect to the displayed image content on the display surface SC.

Here, a specific example of a display form when a character pattern stored in a ROM or the like in the character generation circuit 30 is read out and used as a character display signal will be described with reference to FIG.

FIG. 4 shows the display υ1 of each character when a character display signal is superimposed on the image data readout signal from the image memory 8 and displayed on the display screen SC of the CRT monitor 14, etc., as described above. A specific example of a character display table 50 for specifying a position is shown, and this display table 50 has, for example, 16 characters in the horizontal direction and 8 characters in the vertical direction.
It consists of a total of 128 characters. By sequentially arranging, for example, character patterns such as alphanumeric characters and numbers at predetermined display allocation positions on this character display table 50, various functions of the image reading device can be displayed.

Further, a pointer mark PM, a trimming frame, etc. can also be displayed using one or more characters. As for characters having a 'ζ positional relationship to the display image content, such as pointer marks and trimming frames, the display position moves in conjunction with the scrolling operation of the display image, as described above. This movement of the character display position by 100 can be performed step by step in units of one character by changing the display allocation position in the character display table 50. Furthermore, the reading range determining frame can be moved by changing the display position of the character display table 50 itself with respect to the display surface SC. That is, on the display screen SC in FIG. 4, the display position of the character display table 50, for example, the X at the upper left corner
, Y coordinates (Xy+) can be changed by the character generation circuit 30, by changing the position of the character display table 50 on the display screen SC, the characters in the table 50 can be changed accordingly. The displayed pointer mark PM, trimming frame, etc. will move.

In this embodiment, one character pattern has 12 dots horizontally and 16 dots vertically, and the character display table 50 has 192 dots for 16 characters horizontally and 256 dots for 8 characters vertically. The horizontal I dot of the character is read out using a 5 kHz clock, and one vertical dot corresponds to one line (scanning line) on the display screen SC of the CRT monitor 14. Therefore, on the entire surface of the display screen SC, there are approximately 250 horizontal dots (5k
11z Cronk), vertical 480 dots (effective display screen 4
80 lines), and the display table 50 of 192 dots 1×256 dots is movably displayed within this display screen SC.

Note that even if you do not use the ultimate character generator as described above, you can use a pattern generation ROM etc. that stores character patterns such as the pointer mark and trimming frame, and adjust the readout timing of this ROM to horizontal and vertical synchronization. By changing the display surface SC
You can move the pattern display position above.

Here, in the image reading device according to the embodiment of the present invention,
The part of the image original CD determined by the above-mentioned trimming frame is read again by the above-mentioned reading head 2 and displayed.
It is enlarged and displayed on the entire surface of C. Now, line sensor LS
The number of light receiving cells of C. Considering that the resolution in the Y direction (vertical direction) of the RT monitor display screen SC is approximately 480 lines, when displaying a full-size (A4) document on the display screen SC, it is necessary to It is only necessary to thin out and read at a rate of about one in four, and even when reading an area of 1/4 size and enlarging it for display, it can be read with sufficient resolution using the same line sensor LS. This is because the advantage of re-reading the original image itself is obvious, considering the deterioration in resolution when only a partial area of the image data stored in the image memory after the original is read is taken into account.

However, once an image has been cropped and enlarged, it cannot be cropped again. Additionally, the standard reading range of the image reading device of this embodiment is horizontally long A4 size, but when you want to display a portrait or horizontally written image document horizontally, the upper half of the A4 document is initially displayed in full screen. , In this state, press U of the above key human power device.
When the UP key of the P/DOWN key is pressed, the screen is scrolled upward (arrow yu) by a movement amount of, for example, 2 line (2H) steps. In this scroll i function, the initial state D
Does not accept OWN key, but UP after scrolling
/DOWN are both accepted.

An explanation of these functions is given in the character generation circuit 30 above.
is displayed on the screen under control from CPLj22.

For example, if you perform a trimming operation after the above trimming, "TrllMMING ONCIE ONLY"
" is displayed to indicate that trimming after trimming is not possible. Also, "No 'rRI?" is displayed indicating that trimming is not possible in scroll mode. I old NG IN
SCROLL? IODE", cannot be trimmed when superimposed, cannot be resized when in scroll mode, cannot be superimposed when in scroll mode, I
・Error messages such as the color of the trimming frame cannot be changed or cropping is not possible after scanning the minimum size document are displayed. In addition, when changing the dimensions of the reading range, the reading size will also be displayed as "SIZE n".
Character generation circuit 30 based on control from CPU 22
will do.

According to the embodiment of the present invention described above, when scrolling the display image content on the display screen SC of a CRT monitor or the like,
Characters that are positionally related to the displayed image content, such as pointer marks and trimming frames, are also moved at the same time in the same direction and by the same distance, so it is possible to prevent their positional relationship with the displayed image from shifting.

Note that the scrolling described above may be performed not only in the vertical direction but also in the horizontal direction by further increasing the memory capacity. Additionally, if the pointer mark, trimming frame, etc. moves in conjunction with scrolling and reaches the end of the display screen SC, it may continue to move, but the movement of the pointer mark, trimming frame, etc. may be stopped and only the displayed image contents may be scrolled. This is pointer 7-
This is to prevent marks, trimming frames, and the like from moving out of the range of the display surface SC and becoming invisible. Moreover, the explanatory text of the functions of the above-mentioned device may be displayed stationary at a predetermined position within the display screen SC without being linked to scrolling.

[Effects of the Invention] According to the image reading device of the present invention, f is recorded in the image memory.
When the display image content is scrolled by moving the readout area of the divided image data, a display signal of a character from the character generation means, particularly a character positionally related to the display image content such as a pointer mark or a trimming frame. Since the display position of the character is moved to match the display position of the character with respect to the display image, it is possible to prevent the positional relationship of the character with respect to the display image contents from shifting due to scrolling.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of an image K31 according to the present invention. 2) Figs. 2 and 3 are a block diagram showing an embodiment of the image capturing device, and Figs. 4 is a schematic front view showing a specific example of a character display table on a display surface, and FIG. 5 is a schematic front view showing a specific example of a character display table on a display surface. FIG. 5 is a schematic front view showing a specific example of a character display table on a display surface. FIG. FIG. 6 is a schematic front view showing an example of the display form on the display surface. 50...Character display table GO...
...Image original RA...Memory readout area SC...Display surface PM...Pointer mark T F...Trimming frame...Manuscript Planting stand... To read the image, Image memory... Reading timing control circuit 0...
・Memory control circuit 2...Superimposition circuit 4...CRT (cathode ray tube) monitor I...
・System control circuit 2...CPU 3...Key human power device O...Character generation circuit

Claims (1)

[Scope of Claims] An image reading means for reading an image original; an image memory for taking in the image data read by the image reading means; and a character generation means for outputting a character display signal, the image data being stored in the image memory. A scroll display is performed by moving the readout area of the image data read out from the image memory, and a character display signal output from the character generation means is superimposed on the image data read out from the image memory to generate a display signal. The image reading device controls the movement of the display position of the character display signal from the character generation means in accordance with the movement of the readout area of the image data for the scroll display, and matches the display position of the character with respect to the displayed image. An image reading device characterized by: