JPH0456469A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent recording paper from being wasted or a useless line from being held in advance and to effectively utilize a facsimile by providing a means to detect the receiving state of a received picture data and a means to interrupt the reception of the picture data according to the detected result. CONSTITUTION:When the same interruption is generated, namely, when the received picture data has the same contents completely for the double length of a routine A4 size, data comparators 3 and 25 judge the possibility of abnormality in the received picture and announce it to a CPU 5, and the CPU 5 executes control so as to stop reception. Thus, since the abnormality of the received picture can be detected by simply judging whether the contents of the received picture data are same or not, it is not necessary to arrange sensors or the like in respective constitutive parts, it can be judged whether the received picture or the transmitted picture is effective or not, and it is possible to decrease the wasting of recording paper or the catching of lines.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a facsimile device capable of determining the validity of image data by examining the image data.

[Conventional technology]

Conventionally, when a facsimile transmitter experiences a reading error due to a document jam, the facsimile receiver receives an image that is meaningless to receive (e.g., a long, completely white image), but the facsimile receiver receives it as is. Either the transmitter discovers an abnormality and interrupts communication, or wasteful reception continues until the maximum continuous reception time for one page has elapsed. Also, - when fishing on a boat, and when using a facsimile sending device,
When reading transmission image data from a sheet-like original, set or insert the original to be read in the specified orientation by referring to the pictograms, etc. displayed in the original insertion slot, and adjusting the original insertion direction (upward insertion or downward insertion). The light is irradiated with a light source such as a fluorescent lamp, and the reflected light from the light source is detected by a reading element such as a CCD that detects the intensity of the reflected light and converts it into a binary value, and then a motor is used to transport the document. The image data written on the document was read by conveying the document using a conveyance system that included a computer. In order to detect abnormalities during document reading, sensors are provided at various locations in the conveyance system to detect whether each part is normal or abnormal. For example, they were equipped with a photo sensor that detects whether a fluorescent lamp is on or not, and a step-out sensor (photo interrupter, rotary encoder) that detects whether a motor is rotating normally.

[Problem that the invention is trying to solve] However,
In the above conventional example, even if the facsimile transmitting side has an abnormality, the facsimile receiver side has to continue receiving, which wastes recording paper and continues to seize the line unnecessarily. This hinders effective use of facsimile. In addition, in order to equip the transmitter with a variety of sensors, a physical space is required to mount these sensors, and mounting is complicated, with many restrictions on location and method. It had become. For example, in order to satisfy the condition that a photosensor for checking fluorescent lamp lighting does not affect the optical path from the fluorescent lamp to the CCD, it must be placed at the end or back of the fluorescent lamp, making assembly difficult. It's easy to become a thing. Further, the step-out sensor must be of a type that does not increase the load on the motor and does not require a large device size. Methods that satisfy these conditions generally tend to be difficult to assemble.

[Means to solve the problem]

The present invention was made for the purpose of solving the above-mentioned problems, and includes the following configuration as one means for solving the above-mentioned problems. That is, the apparatus includes a detecting means for discriminating received image data and detecting the reception state of the facsimile received image data, and a receiving interrupting means for interrupting the reception of the image data according to the detection result of the detecting means. In addition, in a facsimile machine that scans an original to read image data, a detection means detects an operating state of the original scanning system by determining the original image data read by the image reading means, and the detection means detects the operating state of the original scanning system. and communication interrupting means for interrupting facsimile communication when an abnormality in operation is detected. Furthermore, in a facsimile machine that scans a document and reads image data with an image reading element, the operation state of the reading element of the image reading means is detected by determining the document image data read by the image reading means provided with the image reading element. The apparatus includes a detecting means and a communication interrupting means for interrupting facsimile communication when the detecting means detects an abnormal operation of the image reading element. Furthermore, in a facsimile machine that reads image data by illuminating a document with an image reading light source, the operation state of the light source of the image reading means is determined by determining the document image data read by the image reading means provided with the image reading light source. The apparatus includes a detection means for detecting an abnormality in the operation of the light source of the image reading means, and a communication interrupting means for interrupting facsimile communication when the detection means detects an abnormal operation of the light source of the image reading means. Further, in a facsimile machine that conveys a document and reads image data, a detection means detects the conveyance state of the document by determining the document image data read by the image reading means, and the detection means detects an abnormality in the conveyance of the document. and communication interrupting means for interrupting facsimile communication.

[Effect]

In the above configuration, for example, the detection means detects the state depending on whether or not the image data is continuously the same over a certain length, and sensors are arranged in each component. It is possible to judge whether the received image or transmitted image is valid, and it is possible to reduce wasteful use of recording paper and line capture.

[Embodiment] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. [First Embodiment] FIG. 1 is a block diagram of a first embodiment according to the present invention. In the figure, 1 is connected to a public network 100;
This is a communication control unit that controls facsimile communication that is unified by the CCITT standard, for example, and has a built-in modem that modulates and demodulates transmitted and received data. 2 is an encoder/decoder that performs encoding processing of transmitted image data and decoding processing of received image data; 3 is an encoder/decoder that encodes data received from encoder/decoder 2 according to set conditions without changing the contents of the received data. When the data comparator 3 detects the set condition, it notifies the CPU 5 of the detection using an interconnect. Further, reference numeral 4 denotes a recording buffer which is a buffer memory for storing the binary data checked by the data comparator 3. Further, numeral 5 is a CPU stored in the ROM 6, which controls the entire apparatus of this embodiment according to the control procedure shown in FIG. 3, which will be described later.
OM, 10 is a scanner unit equipped with an original transport unit, a CCD 16 that reads the content of the original 21, converts it into a few corresponding electric signals and outputs it, and a fluorescent lamp 1 that illuminates the original 21.
The image reading section 15 includes an image reading section 7, a document conveyance section 20 that conveys a document 21, and the like. Further, 25 is a second data comparator that checks the content of the data read by the scanner unit 10 according to set conditions without changing the content of the data. When the detection is successful, the CPU 5 is notified of the detection by interfacing. Reference numeral 26 temporarily stores image data read by the scanner unit 15 (reading buffer); 30 copies out the data read by the scanner 10, and also prints received facsimile data received from another device by the communication control unit 1. Note that 100 is a public line network connected to the facsimile machine of this embodiment, and other facsimile machines are connected to the public network 100. By performing call processing, it is possible to secure a communication path with the calling facsimile machine and perform the desired facsimile communication.When a call is received from the public network 100, the facsimile machine of this embodiment responds. It is also possible to receive facsimile data.In this case, the received data from the communication control unit 1 is sent to the encoder/decoder 2, where it is decoded, and after the data is compared by the data comparator 3, it is sent to the recording buffer. 4 and is printed out by the printer 30 under the control of the CPU 5. An example of the settings for the data comparators 3 and 25 described above is shown in FIG. 2. The data comparators 3 and 25 both have the same configuration. , when both data comparators are not used at the same time, one data comparator may be used in common. Under the setting conditions, the determination start pixel 51 is the code/combiner 2.
In this embodiment, the setting range 52 is "0 to 24".
Any bit of the 32 bits can be set. The number of pixels to be determined 53 is a setting for determining how many bits of content are to be checked starting from the determination start pixel 51, and in the case of this embodiment, the setting range 54 can be set to any bit from 0 to 2432 bits. . The judgment image 55 is the content to be checked, and in the case of this embodiment, three types of checking are possible: whether the data is completely white, completely black, or whether it is the same as the data of the previous line. The number of judgment lines 57 is a setting for determining how many consecutive lines of data matching the judgment image 55 are detected, and in the case of this embodiment, the setting range 58 is any line from "0 to ffff lines". The number is configurable. The received image abnormality detection process at the time of facsimile reception in this embodiment having the above configuration will be described below with reference to FIG. Since other normal facsimile reception processing is well known, a detailed explanation thereof will be omitted, and the reception image abnormality detection processing unique to this embodiment will be described in detail. FIG. 3 is a flowchart when an A4 original is received in the standard mode (sub-scanning 3.857 mm). When there is an incoming call from the public network 100 and the communication control unit 1 detects this, the process of the CPU 5 goes to step S shown in FIG.
Proceeding to the processing of l, the judgment start pixel 51 to the data comparator 3 is sent to the data comparator 3.
As follows, set the first bit °°1°, which corresponds to the left end position of the A4 size image. Next, the number of judgment pixels 53 is set to "1728°", which is the number of bits corresponding to the width of an A4 size document. Judgment image 54
is set to the "data same" mode, and the detection condition for the determination line 57 is set to "2286", which is the number of lines corresponding to 594 mm, which is twice the standard length of A4 size. Then, in step S2, the communication control unit 1 is instructed to respond to the called party and start recording the reception. The received data is decoded by the encoder/decoder 2, subjected to data comparison by the data comparator 3, sent to the CPU 5, and printed out by the printer 3o. Continuing (in step s3, it is checked whether the reception recording has ended or not. If the reception recording has not ended, the process advances to step S4, and if the data is the same as the data of the previous line, the number of judgment lines set in step S1 is 57). It is checked whether or not the same interrupt has occurred in the CPLI 5 for several consecutive minutes.If the same interwart has not occurred, the process returns to step S3 and facsimile reception continues.At this point, recording of one page of facsimile reception data is completed. If so, the process advances to step S5, where it is checked whether there is received data for the next page, and if there is received data for the next page, the process returns to step S1.If there is no change in the settings, step S1, You can skip step S2 and continue receiving facsimile communication data.On the other hand, if there is no received data for the next page in step S5, proceed to step S6 and instruct the communication control unit 1 to restore the line. The communication process ends.Furthermore, if the same interaction occurs in step S4, that is, if the received image data is twice the length of the standard A4 size and has the same content, the process advances to step S7, and the received image data is It is determined that there is a possibility that the image is abnormal, and the reception is canceled.As explained above, according to this embodiment, the received image data is determined by simply determining whether the contents of the received image data are the same. Abnormalities can be detected. This makes it possible to determine whether or not the received and transmitted images are valid by installing sensors in each component, reducing the use of wasteful recording paper, etc. Line capture can be reduced.

[Second Embodiment] The above description has been made regarding the control during facsimile reception processing from another device via the public network 100, but the present invention is not limited to the above-mentioned reception, but also includes facsimile transmission. For controlling time, copying, and other various devices,
It can be applied to abnormality detection by examining this image data. By examining this image data, it is possible to detect an abnormality in the transport motor of the original transport unit 20. The abnormality detection process of the conveyance motor of the document conveyance unit 20 by examining image data according to the second embodiment of the present invention will be described below with reference to the flowchart of FIG. In the second embodiment as well, the block configuration of the facsimile machine and the settings for the data comparator 25 are the same as those in the first embodiment.
Since this embodiment is similar to the first embodiment shown in FIGS. 2 and 2, detailed explanation will be omitted. In FIG. 4, since the normal facsimile communication process is well known, detailed explanation thereof will be omitted, and the abnormality detection process of the document transport motor during document reading, which is unique to this embodiment, will be described in detail. Note that FIG. 4 shows an A4 document in standard mode (sub-scanning 3.
85/mm). When the CPU 5 instructs the scanner section 10 to start reading the document, the process proceeds to step Sll shown in FIG.
As the determination start pixel 51 to the data comparator 25, the CCD
Set "368", which is the number of bits that corresponds to 2 mm inside from the bit that corresponds to the left edge reading position of an A4 size document.Next, set the number of judgment pixels 53 to the number that corresponds to 2 mm inside the right edge of an A4 size document from the start bit. '1696'
Set to . The judgment image 54 is in the "data same" mode, and the judgment line 57 is the number of lines corresponding to 397 mm, which is 100 mm longer than the standard length of A4 size.
8" line is the detection condition. Then, in step S12, the scanner section 10 is instructed to start reading the document. The read data is sent to the CPU 5 after being compared by the data comparator 25, and is stored in the recording buffer 4. or printed out from the printer 30. (Continued) In step S13, it is checked whether reading of one page of the original has been completed. If the reading of the part of the original has not been completed, step S14 Proceeding to step S13, the same data as the data of the previous line continues for the 57 judgment lines set in step Sll, and it is checked whether the same interrupt has occurred in the CPU 5. If the same interrupt has not occurred, step S13 The process returns to step S13 and continues reading one page of the original. If the reading of one page of the original is completed in step S13, the process advances to step S15, where it is checked whether the next original is set in the scanner unit 10. If the next original is set in the scanner section 10, return to step Sll.If there are no changes to the settings, skip step Sll and step SL2 and continue reading the next original. On the other hand, if the next document is not set in the scanner unit 10 in step S15, the process advances to step 816 and the document reading process ends.Furthermore, if the same interaction has occurred in step S14, that is, the reading If the data is all the same for the length of A4 size standard + 100mm, step S
The process proceeds to step 17, where it is determined that there is a possibility that the document conveyance system is not operating normally (and it is determined that the document conveyance motor is out of step), and the reading process is canceled. As described above, according to this embodiment, a reading abnormality can be detected by simply determining whether the contents of the read image data are the same or not. This makes it possible to determine whether the recorded images and transmitted images are valid, reducing the need for sensors to be installed in each component, and reducing the use of wasteful recording paper and line capture. [Third Embodiment] Furthermore, abnormality detection by examining read image data during facsimile transmission, copying, and other various device controls is not limited to abnormalities in the document transport system. The third embodiment of the present invention, which is a process for detecting an abnormality in the CCD 16 by examining image data, will be described below with reference to the flowchart shown in FIG. In the third embodiment as well, the block configuration of the facsimile machine and the settings for the data comparator 25 are the same as in the first embodiment described above.
Since this embodiment is similar to the first embodiment shown in FIGS. 2 and 2, detailed explanation will be omitted. Also in the third embodiment, since the normal facsimile communication processing is well known, detailed explanation will be omitted. The abnormality detection process No. 16 will be explained in detail. The CPU 5 first performs the processing in step S21 shown in FIG.
As the determination start pixel 51 to the data comparator 25, the CCD
The first bit number of 16 is set to 0°. Next, the number of pixels to be determined 53 is set to "'2432", which is the last bit number of the CCD 16. Judgment image 54 is “all black”
mode, and the determination line 57 has a continuous "5" line as a detection condition. Then, in step S22, the scanner section 10 is instructed to simply start the reading operation using CC016 without turning on the fluorescent lamp 17. and step S23, step S
At step 24, reading of the CCD 16 is repeated for a certain period of time while monitoring whether or not there is a full black detection increment from the data comparator 25. Here, the fixed time is a value larger than (time required to read one line) x (number of judgment lines "5"). As a result of monitoring, if an interrelated event does not occur within a certain period of time, it means that the CCD 16 is not operating properly.
The process advances from step S24 to step S25, where the abnormality of the CCD 16 is notified by an error display or the like, and the process is stopped. On the other hand, as a result of monitoring, if included occurs within a certain period of time, the process advances from step S23 to step S26;
The judgment image 54 is changed to the "all white" mode, and the process proceeds to step S27, where the fluorescent lamp 17 is turned on. Then, in step S28, reading of the CCD 16 is started, and continued (in steps S29 and S30, reading of the CCD 16 is repeated while monitoring whether or not there is an all-white detected ink from the data comparator 25 for a certain period of time. As mentioned above, is a value larger than (the time required to read one line) x (the number of judgment lines ゛°5°°). As a result of monitoring, if increments do not occur within a certain period of time, the CCD 16 is normal. Therefore, the process proceeds from step S30 to step S32, where the abnormality of the C0D16 is notified by an error display, etc., and the process is stopped.On the other hand, as a result of monitoring, if included occurs within a certain period of time, Proceeding from step S29 to step S31,
It is determined that the CCD 16 is operating normally, and henceforth, necessary document reading control and the like will be performed. Through the above processing, the operating state of the CCD 16 can be confirmed in advance, and there is no need to install sensors in each component.
It is possible to judge whether recorded images and transmitted images are valid, and it is possible to reduce wasteful use of recording paper and line capture.

[Fourth Embodiment] Furthermore, the abnormality detection of the CCD 16 is not limited to the above case, but can also be performed after the start of document reading. It is also possible to monitor whether an abnormality has occurred in the CCD 16 after starting reading the original. A fourth embodiment of the present invention, which monitors whether or not an abnormality has occurred in the CCD 16 after the start of document reading, will be described below with reference to FIG. In FIG. 6, since normal facsimile communication processing is well known, a detailed explanation thereof will be omitted, and operation monitoring control of the CCD 16 during document reading, which is unique to this embodiment, will be explained in detail. In addition, Figure 6 shows an A4 document in standard mode (sub-scanning 3.85
FIG. When the CPU issues an instruction to the scanner section 10 to start reading the document, the process proceeds to step S41 shown in FIG.
As the determination start pixel 51 to the data comparator 25, the CCD
Set "368°", which is the number of bits that corresponds to 2 mm inside from the bit that corresponds to the left edge reading position of an A4 size document.Next, set the number of judgment pixels 53 to the number that corresponds to 2 mm inside the right edge of an A4 size document from the start bit. Set to 1696”. The judgment image 54 is set to “same data” mode,
The judgment line 57 is the number of lines “1528” which corresponds to a length of 397 mm, which is 100 mm longer than the A4 size standard length.
Line is the detection condition. Then, in step S42, the scanner section 10 is instructed to start reading the document. The read data is sent to the CPU 5 after data comparison by the data comparator 25 and stored in the recording buffer 4 or printed out by the printer 30. In the following step 343, it is checked whether reading of one page of the original has been completed. If reading of one page of the original has not been completed, the process advances to step S44, and the same data as the previous line continues for 57 judgment lines set in step S4I, and the same ink print occurs in the CPU 5. Check to see if there is one. If the same ink print has not occurred, the process returns to step S43 and reading of one page of the document is continued. If the reading of one page of the original is completed in step 343, the process advances to step S45, where it is checked whether the next original is set in the scanner unit 10, and if the next original is set in the scanner unit 10, the process proceeds to step S45. Then, the process returns to step S41. Note that if there is no change in the settings, steps S41 and S42 may be skipped and the next document reading process may be performed. On the other hand, if it is determined in step S45 that the next document is not set in the scanner unit 10, the process advances to step 816, and the document reading process is ended. Further, if the same interaction has occurred in step S44, that is, if the read data has the same content for the length of A4 size standard + 100 mm, step S44 is performed.
At step 47, it is determined that the CCD 16 may not be operating normally, and the reading process is stopped. As described above, according to this embodiment, an abnormality in the CCD 16 can be detected by simply determining whether the contents of the read image data are the same or not. by this,
It is necessary to install sensors in each component (it is possible to judge whether the recorded image or transmitted image is valid or not, and to reduce unnecessary use of recording paper and line capture. can.

[Fifth Embodiment] Furthermore, abnormality detection by examining read image data during facsimile transmission, copying, and other various device controls is not limited to abnormalities in the document transport system and CCD 16. It can also be applied to abnormality detection of the fluorescent lamp 17. The abnormality detection process of the fluorescent lamp 17 by examining image data according to the fifth embodiment of the present invention will be described below with reference to the flowchart of FIG. 7. In the fifth embodiment as well, the block configuration of the facsimile machine and the settings for the data comparator 25 are the same as those in the first embodiment described above.
Since this embodiment is similar to the first embodiment shown in FIGS. 2 and 2, detailed explanation will be omitted. Also in the fifth embodiment, since the normal facsimile communication processing is well known, detailed explanation will be omitted. The abnormality detection process for the lamp 17 will be explained in detail. In step S51 shown in FIG. 7, CPtJ5 first selects CC
Set '1000' for D16.Next, set the number of pixels to be judged as 53.
is set to “400”, and CCD16’s 1000 to 140
The determination target is up to 0 bits. The judgment image 54 is set to the "all white" mode, and the judgment line 57 is set to a continuous "5" line as the inspection condition. Then, in step S52, the scanner unit 10 is instructed to turn on the fluorescent lamp 17, and in the subsequent step S53, the CCD 1
6, the reading of the CCD 16 is repeated while monitoring whether or not there is an all-white detection interrupt from the data comparator 25 for a certain period of time in steps S54 and S55. The value is larger than (the time required to read the line) x (the number of judgment lines '5'). As a result of monitoring, if increments do not occur within a certain period of time, the fluorescent lamp 17 is not lit normally due to some reason. Therefore, the process proceeds from step S55 to step S57, where an error message or the like is displayed to notify the abnormality of the fluorescent lamp 17, and the process is stopped.On the other hand, as a result of monitoring, if an interrelated event occurs within a certain period of time, Proceeding from step S54 to step S56,
It is determined that the fluorescent lamp 17 is lit normally, and from then on, necessary document reading control and the like will be performed. Through the above processing, it is possible to check the lighting state of the fluorescent lamp 17 in advance, and it is possible to judge whether the recorded image or transmitted image is valid without the need to install sensors in each component. , it is possible to reduce wasteful use of recording paper and line capture. [Sixth Embodiment] Furthermore, the detection of lighting abnormality of the fluorescent lamp 17 is not limited to the above case, but can also be performed after the start of document reading. It is also possible to monitor whether a lighting abnormality of the fluorescent lamp 17 has occurred after the start of document reading. A sixth embodiment of the present invention will be described below with reference to FIG. 8, in which it is monitored whether or not a lighting abnormality has occurred in the fluorescent lamp 17 after the start of document reading. In FIG. 8, since the normal facsimile communication process is well known, a detailed explanation thereof will be omitted, and the lighting monitoring control of the fluorescent lamp 17 during document reading, which is unique to this embodiment, will be explained in detail. In addition, Fig. 8 shows an A4 document in standard mode (sub-scanning 3.85
FIG. When the CPU 5 instructs the scanner section 10 to start reading the document, the process proceeds to step S61 shown in FIG.
As the determination start pixel 51 to the data comparator 25, the CCD
Set "368", which is the number of bits 2 mm inside from the bit corresponding to the left end reading position of the A4 size original. Next, the number of judgment pixels 53 is set to '1696', which is the number corresponding to 2 mm inside the right edge of an A4 size document from the start bit.The judgment image 54 is set in the "data same" mode,
The judgment line 57 is the number of lines “1528” which corresponds to a length of 397 mm, which is 100 mm longer than the A4 size standard length.
Line is the detection condition. Then, in step S62, the scanner section 10 is instructed to start reading the document. The read data is sent to the CPU 5 after data comparison by the data comparator 25 and stored in the recording buffer 4 or printed out by the printer 30. In the following step S63, it is checked whether reading of one page of the document has been completed. If reading of one page of the document has not been completed, the process advances to step S64, and the same data as the previous line continues for the number of determination lines (57) set in step S61, and the same ink print occurs in the CPU 5. Check to see if there is one. If the same ink print has not occurred, the process returns to step 363 and continues reading one page of the document. If the reading of one page of the original is completed in step S63, the process advances to step S65, where it is checked whether the next original is set in the scanner unit 10, and if the next original is set in the scanner unit 1o, the process proceeds to step S65. Then, the process returns to step S61. Note that if there is no change in the settings, steps S61 and S62 may be skipped and the next document reading process may be performed. On the other hand, if the next document is not set in the scanner unit 10 in step S65, the process advances to step S16 and the document reading process is ended. Furthermore, if the same ink print occurs in step S64, that is, if the read data has the same contents for the length of A4 size standard + 100 mm, step S64 is performed.
The process proceeds to step 67, where it is determined that the fluorescent lamp 17 is malfunctioning and is not lighting up normally, and the reading process is stopped. As described above, according to this embodiment, a failure of the fluorescent lamp 17 can be detected by simply determining whether the contents of the read image data are the same or not. by this,
It is possible to determine whether recorded images and transmitted images are valid without the need to install sensors in each component, reducing wasteful use of recording paper and line capture. .

[Seventh Embodiment] Furthermore, the determination of whether the communication data of the facsimile device is normal or abnormal, which is determined by examining the image data, is not limited to each of the above (for example, in the case of incorrect insertion of the document 21). The details of the process for detecting incorrect insertion of the original 21 according to the seventh embodiment of the present invention by examining the image data will be described in the ninth embodiment.
This will be explained below with reference to the flowchart shown in the figure. In FIG. 9, since the normal facsimile communication process is well known, a detailed explanation thereof will be omitted, and the erroneous insertion detection process of the document 21 during document reading, which is unique to this embodiment, will be described in detail. In addition, Figure 9 shows an A4 document in standard mode (sub-scanning 3.85
7 mm) is a flowchart. When the CPU 5 instructs the scanner section 10 to start reading the document, the process proceeds to step S71 shown in FIG.
As the determination start pixel 51 to the data comparator 25, the CCD
Set "368°", which is the number of bits that corresponds to 2 mm inside from the bit that corresponds to the left edge reading position of an A4 size document.Next, set the number of judgment pixels 53 to the number that corresponds to 2 mm inside the right edge of an A4 size document from the start bit. Set to 1696”. This is to prevent the shadow of the document from being included in the determination data even if the document 21 is conveyed diagonally or the like. The judgment image 54 is in "all white" mode, and the judgment line 57 is 297 m, which is the standard length of A4 size.
The detection condition is 1143 lines, which is the number of lines corresponding to m. Then, in step S72, the scanner section 1o is instructed to start reading the document. The read data is sent to the CPU 5 after data comparison by the data comparator 25 and stored in the recording buffer 4, or printed out by the printer 30. Continuing (In step S73, it is checked whether reading of one page of the original has been completed. If reading of one page of original has not been completed, the process advances to step S74, and the all-white data has reached the determination line set in step S71. For several minutes, the CPU 5 checks whether or not an all-white interwoven has occurred.If an all-white interwoven has not occurred, the process returns to step 373 and continues reading one page of the document.In step S73, page 1 is detected. If reading of the original has been completed, the process advances to step S75, and it is checked whether or not the next original is set in the scanner unit 10. If the next original is set in the scanner unit 10, step S71 If there are no changes to the settings, skip steps S71 and S72 and continue reading the next document.On the other hand, if the next document is not set in the scanner unit 10 in step S75, If not, the process advances to step 816, and the document reading process ends.Furthermore, if all-white interwoven occurs in step S74, that is, if the read data is all white in A4 size standard length, the process advances to step S77. Then, it determines that there is a possibility that the back side of the document has been read, and stops the reading process.As explained above, according to this embodiment, a simple judgment as to whether the content of the read image data is completely white or not is performed. By doing this, it is possible to detect incorrect insertion of a document.This makes it possible to determine whether the recorded image or transmitted image is valid, without the need to install sensors in each component. It is possible to reduce unnecessary use of recording paper and line capture.In addition, in each of the first to seventh embodiments described above,
Although hardware called a data comparator is provided, the same function may be realized by software. Moreover, the determination image is not limited to each example, and the determination pixel range is not limited to each of the above-mentioned ones. Of course, the same effect can be achieved even if the determination is made within an arbitrary range in each case.

[Effects of the Invention] As explained above, according to the present invention, abnormalities in received images and read image data can be detected by determining the contents of image data based on the simple criteria of all white/all black/identical. . As a result, it is possible to prevent wasteful consumption of recording paper due to reception of abnormal images and capture of the line, and to realize reliable facsimile communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention. FIG. 2 is a diagram showing an example of setting contents for the data comparator of this embodiment, FIG. 3 is a flowchart showing facsimile communication control of the first embodiment according to the present invention, and FIG. FIG. 5 is a flowchart showing the abnormality detection process of the document transport system during document reading in the second embodiment; FIG. 5 is a basic control flowchart for CCD operation confirmation in the third embodiment according to the present invention; FIG. 6 is the fourth embodiment according to the present invention. CCD when reading the original
Flowchart showing operation monitoring control, FIG. 7 is a flowchart showing fluorescent lamp failure occurrence monitoring control in the fifth embodiment of the present invention, and FIG. 8 is a flowchart showing fluorescent lamp failure during document reading in the sixth embodiment of the present invention. Flowchart showing monitoring control. FIG. 9 is a flowchart showing erroneous document insertion detection processing when reading a document according to the seventh embodiment of the present invention. In the figure, 1... communication control unit, 2... encoder/decoder, 3
．． 25...Data comparator, 4...Record buffer, 5
...CPU, 6...ROM, 10...Scanner section, 15...Image reading section, 16...CCD, 17...
- Fluorescent lamp, 20... Original transport unit, 21... Original, 2
6...Reading buffer, 30...Printer, 100
...It is a public line network. Patent Applicant Canon Agent Patent Attorney Co., Ltd.
Yasunori Otsuka (1 other person) - 3'. Niyuki Figure 2 Figure 3 Figure 4 Figure 5 Figure 7 Figure 6 Figure 8

Claims (6)

[Claims] (1) The apparatus is characterized by comprising a detection means for determining the received image data and detecting the reception state of the facsimile received image data, and a reception interrupting means for interrupting the reception of the image data according to the detection result of the detection means. facsimile machine. (2) In a facsimile device that scans an original to read image data, a detection means detects the operating state of the original scanning system by determining the original image data read by the image reading means; 1. A facsimile apparatus comprising: communication interrupting means for interrupting facsimile communication when an abnormality in operation of the facsimile apparatus is detected. (3) In a facsimile machine that scans a document and reads image data with an image reading element, the operating state of the reading element of the image reading means is detected by determining the document image data read by the image reading means equipped with the image reading element. A facsimile apparatus comprising: a detection means for detecting an abnormal operation of the image reading element; and a communication interruption means for interrupting facsimile communication when the detection means detects an abnormal operation of the image reading element. (4) In a facsimile machine that reads image data by illuminating a document with an image reading light source, the operating state of the light source of the image reading means is determined by determining the document image data read by the image reading means equipped with the image reading light source. A facsimile apparatus comprising: a detection means for detecting; and a communication interrupting means for interrupting facsimile communication when the detection means detects an abnormal operation of a light source of the image reading means. (5) In a facsimile device that conveys a document and reads image data, a detection means detects the conveyance state of the document by determining the document image data read by the image reading means, and the detection means detects abnormality in the conveyance of the document. A facsimile device comprising communication interrupting means for interrupting facsimile communication upon detection. (6) The detection means detects the state based on whether or not the image data is continuously the same over a certain length. facsimile machine.