JPH0435571A - System for setting facsimile read density - Google Patents

Abstract

PURPOSE:To transmit a binary picture of good quality where a read density threshold value is set to an optimum value with respect to each document by converting read information of the document from a read part to binarized information by the density threshold value to transmit this information. CONSTITUTION:A picture memory 21 where the picture which is read by a read part and includes variable density information of a document is stored and a variable density switching control part 22 are provided, and this means 22 reads out the picture including variable density information from the picture memory 21 and displays it on a display part 11-2 and sets the read density threshold value with a density operation button 11-3 so that an optimum picture of each document is obtained, and read information of the document from the read part 12 is converted to binarized information by the density threshold value and is transmitted. Consequently, an operator does not simply sensuously make a decision but the actual picture pattern is displayed on a display device to set a rational density threshold value. Thus, the binary picture of good quality where the read density threshold is set to an optimum value with respect to each document is transmitted.

Description

[Detailed Description of the Invention] [Summary] Regarding a reading density setting method for changing the reading density partition value of a document in a facsimile machine, the reading density partition value is set to an optimum value for each document, and the reading density partition value is always set to a high quality.
The purpose is to provide a facsimile density setting method that enables the transmission of value images, and includes an image memory for reading and storing an image containing shading information of a document from a reading section, and the image memory containing shading information. a grayscale switching control section that reads an image, displays it on the display section, and sets the read density partition value using the density operation button so that the image is optimal for each document; The read information is converted into binary information using the density partition value and transmitted.

[Industrial application field]

The present invention relates to a reading density setting method for changing the reading density partition value of a document in a facsimile machine.

[Conventional technology]

In conventional facsimile machines, the density setting of the transmitted document is set by changing the density to multiple levels using the #A degree operation button on the panel. In this case, the density settings of the original depended solely on the sense of the operator.

FIG. 4 shows a configuration diagram of an example of a conventional facsimile machine. In the apparatus 1 shown in the figure, predetermined function settings are performed by an operation control section 11 provided with a panel 11-1 under the control of a main control section (CPU) 10. This panel 11-1 is usually provided with a density operation button that can be changed in multiple steps. Then, the destination of the transmission is dialed using a numeric keypad, one-touch key, etc., and the line is connected. If the other party has an automatic reception function, the pre-procedure of the communication sequence is started. on the other hand,
A document is inserted into the reading section 12 and optically converted into a binarized image. After this binarized image is encoded and compressed by the compression/decompression section 14 using, for example, the MH (Modified Huffman) method, it is stored in the transmission memory 15.

In addition, the modem 16 is set according to the function of the other party in the pre-procedure of the communication sequence, and then the memory 15 is set at a predetermined time.
The contents of the data are read out, restored, recompressed in accordance with the functions of the other party, modulated into a carrier wave by the modem 16, and sent out to the line via the line control section 17. Conversely, the carrier wave is demodulated by the modem 16 from the line via the line control unit 17,
Whether the compressed image data is temporarily stored in the memory 15 or
Alternatively, it is decompressed by the compression/decompression section 14 and printed out from the recording section 16.

[Problem to be solved by the invention]

As mentioned above, in conventional facsimile machines, operators intuitively judge and set the density of the document, so if the actually set reading density partition value is not optimal for the document,
The reception screen was often incomplete or unclear9, or an error message was displayed and retransmission was requested.

In this way, if the reading density partition value corresponding to the original is not the optimal value, you can either reset the settings and resend, or in order to avoid resending, you can set the binary image using the Cobi function of your machine. The image quality had to be checked, and in any case, a time-consuming process was required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile reading density setting method that sets an optimum value for the reading density partition value for each document and always transmits high-quality binary images.

[Means to solve the problem]

In order to achieve the above object, as shown in the main part configuration diagram of the principle explanatory diagram in FIG. Facsimile reader 1l with operation buttons 11-3
In the intensity setting method, an image memory 21 (which reads and stores an image containing gradation information of the original from the reading section 12), and an image containing the gradation information from the image memory 21 are output and displayed on the display section 11-. 2, and set the reading density partition value to the a! so that the optimum image is obtained for each document. One-time operation button 11
-5, and is configured to convert the reading information of the document from the reading section into binary information using the density partition value and transmit it.

[For production]

FIG. 1 (6) is an explanatory diagram of the operation of the gradation switching control section. When an image 2 of a document is inserted into the reading section 12, the image 20 containing gradation (black and white) information is an image with black protrusions as shown in the figure. Suppose that

If the operator's density partition value (slice level) for this is SO, it is not the optimum value and a complete binary image (2) can be obtained. However, this slice level is Si or S! , an all-white image O or an all-black image is obtained, and SO
There is a risk that the image will be incomplete between the values of 511 and 511S2. Therefore, in the present invention, the operator uses the current density button to change and set the slice level to the optimum value S. while looking at the display of the density information. This makes it possible to handle any type of original and ensure good received image quality.

[Karma example]

FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention.

In the same figure, the difference from the conventional example shown in FIG. 4 is that, as explained in the principle explanatory diagram of FIG. Grayscale switching control unit 2 that sets the slice level so that
In connection therewith, a display 11-2 and a concentration operation button 11-5 may be newly installed or existing ones may be used.

That is, in order to set the optimum rework slice level for each document, the entire document or an arbitrary portion is extracted by scrolling or the like and stored in the image memory 21. This is read out and displayed on the display unit 11-2, the slice level is changed 1i11 degrees, and the settings are made after confirming that there are no missing or blurred parts.

Although the display unit 11-2 displays the entire document to be transmitted in tV order, it is also possible to display only a portion or an arbitrary portion of the document for representation. In such a case, the current display device may be used as is.

FIG. 5 is a flowchart showing the operation of the embodiment.

In the figure, the original is first inserted into the reading unit 12, and after it is stored in the image memory 21, the operator determines the slice level (5) by switching the density operation buttons 1-3 on the panel to determine whether or not it is necessary to increase the density. Lower it to the black side or raise it to the white side. Figure (6) shows an example of an actual scanning figure, and as a result, for example, a turtle or S2 is raised, lowered,
Determine the binarization slice level. Based on this binarized slice level, binarized information is generated from the image memory 21 and sequentially displayed on the display section 11-2, and the operator changes the density of the document while looking at this display. That is, by switching the shading operation buttons 1-3, it is possible to set the slice level (So) with high precision, unlike the above. As shown in the same figure (b), it is clear that the slice level SoO
That's slice level S! Or S! It represents a more accurate pattern. The resulting binary information is stored in the transmission memory 15 of the conventional example shown in FIG. 4, and is transmitted from the memory.

〔Effect of the invention〕

As explained above, according to the present invention, for documents with different optimal values of gray slice levels, the operator does not simply judge intuitively, but sets the actual image pattern by displaying it on the display. Therefore, Figure 3 (6)
It can be set reasonably as shown in . This eliminates the need for troublesome processes such as retransmission by changing the grayscale slice level in the Q1 conventional example and grayscale confirmation by copying at your own expense, reducing time, reducing communication volume, and saving recording paper. It is of great help.

[Brief explanation of drawings]

Figures 1 (α) and (b) are diagrams explaining the principle of the present invention, Figure 2 is a diagram explaining the configuration of the embodiment, Figure 5 is a flowchart showing the operation of the embodiment, and Figure 4 is a diagram explaining the conventional example. In the figure, 1 is a facsimile device, 10 is a main control unit (cpv), 11 is an operation control unit, 11-1 is a panel, 11-2 is a display unit, 11-3
1 is a manufacturing operation button, 12 is a reading unit, 21 is an image memory, 2
2 indicates a grayscale switching control section. Configuration explanatory diagram of the embodiment Fig. 2 (a) R diagram A flowchart showing the operation of the embodiment 11131! It Explanatory diagram of conventional example Fig. 4

Claims (1)

[Claims] In a facsimile reading density setting method that has a display and a density operation button that changes a reading density partition value according to the density of an input original, an image containing density information of the original is read from a reading unit. an image memory to be stored; and an image containing gradation information is read from the image memory and displayed on the display section, and the reading density partition value is set using the density operation button so that an optimal image is obtained for each document. A facsimile reading density setting method, further comprising: a density switching control section for converting document reading information from the reading section into binary information using the density partition value and transmitting the binary information.