JPS6249474A - Electronic image data display device - Google Patents

Abstract

PURPOSE:To read out an image to which a display and read out are conventionally impossible by a cathode-ray tube image display section by providing plural density changing systems in an image display data generating section and selecting an optimum density changing system suitable for an original according to image density and quality in the original for image inputting. CONSTITUTION:In an image data display unit, an original for image inputting is resolved to each longitudinal and lateral dot numbers of an A4 resolution diagram by an image inputting section, and inputted to an image display data generating section 12 as original image data. The image display data generating section can select four different density changing systems according to the selection signals 113 of an image data generating and selecting section 13. A changing system is selected by the image data generating and selecting section 13, and image display data 112 are formed by the density change of the system, and displayed in a cathode-ray tube image display section 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic image data display device.

[Conventional technology]

Conventionally, in this type of electronic image data display device, documents such as handwritten documents and drawings are manually converted into image data using an image processing device and displayed on a cathode ray tube.

[Problem that the invention seeks to solve]

In conventional electronic image data display devices, when inputting and displaying images from an image input device on a cathode ray tube, the resolution of the image input device and the resolution of the cathode ray tube are generally different, so density conversion is performed when converting the image data. When converting density like this, the conversion method is fixed, so input document 1
Due to the contents of the drawings, etc., there was a drawback that they could not be read when displayed on a cathode ray tube.

The above circumstances will be explained in more detail with reference to FIGS. 2 to 5. FIG. 2 shows a document resolution diagram for image input, and FIG. 3 shows a resolution diagram for image display.

In Fig. 2, in the case of an A4 size original, when the original is converted into image data at a resolution of 8 lines/mm, the image shown in Fig. 2(a) is
As per the A4 resolution map, 1728 dots vertically and 2286 dots horizontally.
It becomes a dot. In FIG. 3, the image display resolution differs depending on each device, but the resolution is 1024 vertical dots and 11024 dots as shown in FIG. 3(a). Therefore, since the resolution for manual image processing and the resolution for image display are different, density conversion of image data is required. Normally, the density conversion is shown in FIG. 2(b), which is an enlarged A4 resolution image.

X121 X2+1 X22/ X131 X141
X231
It is expressed by converting it into one dot each. This conversion is as shown in FIG. 4, X I I +X 12+ X2+
X22/X13+X14+x23+X
This is done in a fixed manner by ORing each dot in the 4 dots of 24/''.In other words, if at least one of the 4 dots has data, then these 4 dots are combined with the 1 dot that has data. Convert to dot.

If the conversion method is fixed in this way, for example, as shown in Figure 5 (
When displaying the number ■ as shown in a) as white human input data, according to the conversion described above, it is displayed as each OR of 4 dots, so the white part is the data as shown in Figure 5 (b). It is judged that there is, and it becomes the same as the surrounding black part,
White areas cannot be displayed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image data display mounting which eliminates the drawbacks caused by fixed density conversion as described above.

[Failure to solve the problem]

The present invention provides an image input unit that reads a manuscript for human input and creates image original data, an image display data conversion unit that converts the original image data into image display data, and a cathode ray tube that displays the manuscript using the image display data. An image data display device comprising an image display unit, wherein the image display data converting unit is provided with an image data density conversion method between a plurality of image original data and image display data, and the image data display device further comprises: An image data conversion selection section is provided for selecting the plurality of density conversion methods in the data conversion section, and an optimal density conversion method can be selected depending on the image density 1 quality of the document, and optimally displayed on the image display section. It is a special (based).

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an electronic image data display device which is an embodiment of the present invention.

In FIG. 1, 11 is an image input unit that reads an image input document and creates image original data, 12 is an image display data conversion unit that converts the image original data into image display data, and 13 is a data conversion unit in the image display data conversion unit. 14 is a cathode ray tube image display section. In this image data display device, the image input unit 11 inputs an image manual document into a multi-portrait image with A4 resolution as shown in FIG. 2(a).

It is decomposed into the number of horizontal dots and inputted to the image display data converting section 12 as original image data 111.

In the image display section/twilight section 12, four density conversion methods can be selected by the selection signal 113 of the image data conversion selection section 13.

FIG. 6 shows these four density conversion methods.

Fig. 6(a) shows that data is present when at least one of the four dots has data, and Fig. 6(b) shows that data exists when at least two of the four dots have data. Diagram (C) shows at least 3 out of 4 dots.
If data is present when there is data in the dot, the sixth
Figure (d) shows a case where data is determined to be present when all of the four dots have data.

When applying this embodiment to the example shown in FIG. 5, the conversion method shown in FIG. 6(C) is selected by the image data conversion selection unit 13,
Image display data 112 is formed by density conversion using this method, and is displayed on the cathode ray tube image display section 13.

FIG. 7 is a resolution diagram at this time, and FIG. 7(a) is a resolution diagram of the original for image input, which is the same as FIG. 5(a).
FIG. 7(b) is a resolution diagram for displaying an image, and it is possible to display a blank portion.

〔Effect of the invention〕

As explained above, the present invention includes a plurality of density conversion methods in the image display data converting section, and selects the optimum density conversion method suitable for the original twist based on the image density 2 quality in the document of the image manual manuscript. This has the effect of making it possible to read images that could not be read on a conventional cathode ray tube image display section.

[Brief explanation of the drawing]

Figure 1 is a block diagram of an electronic image data display device, Figure 2 is a resolution diagram of a document for manual image display, Figure 3 is a resolution diagram for image display, and Figure 4 explains the conventional density conversion method. Figure 5 is a diagram showing white human power data, Figure 6 is a diagram explaining the density conversion method, and Figure 7 is a diagram showing white white data to explain the operation of one embodiment. FIG. 3 is a diagram showing input data. 11 ...... Image input section 12
...... Image display data conversion section 13
...... Cathode ray tube image display section 14
...... Image data conversion selection section 111.
...... Original image data 112...
... Image display data 113 ...
... Selection signal agent Patent attorney Yoshiyuki Iwasa - 221116 Do, 7 To □ (a) Figure 2 ← 1024F', To 11 <a> (b) Figure 3 (a) (b) Figure 5 (a) Translation (b) Gate (C) Translation (d) Field (D) Figure 6 Figure 7

Claims (1)

[Claims] (1) An image input section that reads a document for image input and creates image original data; an image display data conversion section that converts the image original data into image display data; and a cathode ray tube image that displays the document using the image display data. an image data display device comprising a display section, wherein the image display data converting section includes an image data density conversion method between a plurality of image original data and image display data; An image data conversion selection section is provided for selecting the plurality of density conversion methods in the conversion section, and an optimal density conversion method can be selected depending on the image density and quality of the document, and the image data conversion method can be optimally displayed on the image display section. Characteristic electronic image data display device.