JPH0927896A - Image processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain edit of a marker of an original with the marker added thereto without the need for a large capacity memory. SOLUTION: The processing unit is provided with a read section 1 reading an original and outputting image data for each picture element, a density discrimination 2n discriminating a specific color of the image data outputted from the read section 1 and providing an output of data denoting the specific color, a filter processing section 3 applying filter processing to the data outputted from the density discrimination section 2, a periodic pattern generating section 5 generating periodic pattern data synchronously with a data output of the read section 1, and a threshold processing section 4 thresholding the image data outputted from the read section 1, an output processing section 6 selecting data outputted from the periodic pattern generating section 5 according to data outputted from the filter processing section 3 or data outputted from a threshold processing section 4 and providing an output of the selected data synchronously with the read data output, a recording section 8 recording data outputted from the output processing section 6, and a communication control section 13 sending data outputted from the output processing section 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus for reading a document on which an image of a particular color such as a marker is attached and performing image processing on the document image according to the particular color.

[0002]

2. Description of the Related Art In an image processing apparatus such as a facsimile, an original is irradiated with a light source such as a fluorescent lamp as shown in FIG. 30, and the reflected light is converted into an electric signal by a photoelectric conversion device such as a CCD to perform shading correction. Multi-valued image data is obtained by performing correction processing and analog / digital conversion processing. When binary image data is required for an output image such as a facsimile, the multi-valued image data is binarized with a certain threshold value to obtain an output image. For example, when the multi-valued image data represents the density of a document, a portion having a density equal to or higher than a threshold appears as black, and a portion having a density lower than the threshold appears as white. This output image is transmitted page by page or printed out on recording paper. There may be a case where the manuscript does not need to be transmitted or there is a portion that should not be transmitted, and the manuscript should be edited and transmitted. In that case, the necessary part is cut out and pasted on another sheet before sending the original, or the part not desired to be sent is hidden and then the original is read before being sent.

On the other hand, as shown in FIG. 31, a necessary portion in a document is surrounded by a marker such as a highlighter pen, a marker portion is detected by a color scanner, and based on the result, editing such as deletion of image data is performed, or pre-editing is performed. There is also a device having a function of inputting a desired region into an input device in the device and editing the input result.

On the other hand, as another example, there is a device for reading an image, temporarily storing it in a memory, and then editing the image by software control.

[0005]

However, when the document is cut and pasted to perform the editing work, an extra work is required in addition to the sending, which is troublesome for the operator.

On the other hand, when the color scanner is used for the reading unit to determine the marker portion, the cost is increased as compared with the case where the monochrome scanner is used. Further, when inputting an area to be edited in advance to an input device in the device, an input device for specifying the region is required in addition to the image processing device, resulting in problems such as increased cost and complication of the device.

There is also an example in which an image read by a scanner is temporarily stored in a memory and the image in the memory is edited by software or hardware control. In this case, an image memory for storing the image is provided in the apparatus. However, there is a problem that the processing speed becomes slow because the image processing is performed by software.

Further, since the read original image is binarized in a general facsimile apparatus, a marker portion attached by a highlighter pen in the original may be used depending on the threshold setting value in the binarization. In some cases, the color part attached with a felt-tip pen and the like had a lower density than black characters, so it was not sent as an image. Moreover, if the marker part traced on the character is transmitted as an image, the transmitted image will be an image like a black pen smeared with a black pen, and the operator on the receiving side cannot read the character. Also, if the teacher tries to send the student a faxed copy of the student's answer sheet corrected with a red pen, the letters on the red pen will also be black, and the receiving student will see the red pen written by the teacher. It was difficult to find the letters, and the letters written by the teacher gave a weak impression.

[0009]

In view of the above-mentioned problems, the present invention provides a reading means for reading an original and outputting image data for each pixel, and a specific color portion of the image data output from the reading means. And a discriminating means for outputting data indicating that it is a specific color portion, and a filter processing means for filtering the data output from the discriminating means,
Periodic pattern generating means for generating periodic pattern data in synchronization with the data output of the reading means; and binarization processing means for binarizing the image data output from the reading means,
According to the data output from the filter processing means, either the data output from the periodic pattern generation means or the data output from the binarization processing means is selected and synchronized with the data output of the reading means. An image processing apparatus comprising: a selection unit for outputting and an output unit for recording or transmitting the data output from the selection unit.

Further, according to the present invention, the reading means for reading the original and outputting the image data for each pixel and the specific color portion of the image data output from the reading means are discriminated, and it is shown as the specific color portion. Discriminating means for outputting data, filtering means for filtering the data output from the discriminating means, periodic pattern generating means for generating periodic pattern data in synchronization with the data output of the reading means, and reading means Binarizing processing means for binarizing the image data output from the data, the data output from the periodic pattern generating means in accordance with the data output from the binarizing processing means, and the filter processing means. Selecting means for selecting any of the data and outputting in synchronization with the data output of the reading means; and recording or transmitting the data output from the selecting means. There is provided an image processing apparatus characterized by comprising output means for the.

Further, according to the present invention, a reading means for reading an original and outputting image data for each pixel, a binarization processing means for binarizing the image data outputted from the reading means, and the reading means. Synchronizing with the data output of the reading means, a judging means for judging whether or not it is a specific color portion based on the density or luminance of the output image data, a filter processing means for filtering the data outputted from the judging means, and a data output of the reading means. Conversion means for converting the image data from the binarizing means of the line in which the data showing the specific color exists or the next line from the binarizing means into white pixels in accordance with the data showing the specific color portion outputted from the filtering means. And an output unit for recording or transmitting the data output from the conversion unit, and an image processing apparatus.

Further, according to the present invention, a reading means for reading a document and outputting image data for each pixel, a binarization processing means for binarizing the image data output from the reading means, and the reading means. Synchronizing with the data output of the reading means, a judging means for judging whether or not it is a specific color portion based on the density or luminance of the output image data, a filter processing means for filtering the data outputted from the judging means, and a data output of the reading means. In accordance with the specific color portion output from the filter processing means, the image data from the binarization processing means is output on the line where the data indicating the specific color exists or the next line, and the data indicating the specific color is output. For lines that do not exist, the above 2
An image processing apparatus comprising: a conversion unit that converts the image data from the binarization unit into white pixels; and a unit that records or transmits the data output from the conversion unit.

Further, the reading means for reading the image of the original, the judging means for judging an image having a color in the image read by the reading means, and the color of the image read by the reading means by the judging means. An image determined to have the above-mentioned image is converted into a black image, and other images are converted into a predetermined repeating pattern image, and a transmission unit for transmitting the image converted by the conversion device by facsimile. And a facsimile apparatus characterized by the above.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a block diagram showing a first embodiment of the present invention. In the figure, 1 is a document reading unit that reads a document and outputs multivalued data corresponding to the read density, 2 is a density determination unit that determines the density of multivalued image data output from the document reading unit 1, and 3 is a density determination unit. A filter processing unit that performs a filtering process on the result, 4 a binarization processing unit that performs a binarization process of multi-valued image data, 5 a periodic pattern generation unit for generating a periodic pattern, and 6 an output of the filter processing unit Based on the result, an output processing unit that selects and outputs either the output of the binarization processing unit 4 or the output of the periodic pattern generation unit 5, 7 is a control unit that controls the operation of the apparatus, and 8 is an output processing unit 6. A recording unit that records the output on paper,
Reference numeral 9 is a sync signal generator that generates a sync signal for the apparatus, 10 is an operation section for the apparatus, and 13 is a communication controller.

FIG. 2 is a time chart showing the relationship among the image clock, the line synchronizing signal, the page synchronizing signal and the image data. The image data V is transferred in synchronization with the image clock. The page synchronization signal is a signal indicating the beginning of the document, and the rising edge of this signal is the beginning of the first line of the read document. The line synchronization signal is a signal representing the beginning of each line, and the rising edge of this signal is the beginning of the line.

FIG. 3 is a diagram showing a configuration example of the density determination unit 2. 2-1 and 2-2 are comparators, V is multi-valued image data sent from the document reading unit 1, THH, TH
L is a density threshold value, which is set by the control unit 7.
Further, THH> THL. The comparator 2-1 has THH> V
, And the comparator 2-2 outputs 1 when THL <V. That is, the density determination unit 2 outputs 1 when THL <V <THH.

FIG. 4 is a density histogram of a felt-tip pen (red), a marker pen (fluorescent pen) and a character portion. The vertical axis of the graph represents the value of multi-valued image data when one pixel is 6 bits (0 to 63), and the vertical axis represents the number of pixels within a certain area. From the figure, the felt-tip pen area has a density of 40 to 50, the fluorescent pen area has a density of around 20, and the character area has a density of 6.
Around 2, 63, the number of pixels is the largest. That is, it is possible to separate the character part and the marker part by the density. For example, in order to output 1 when the density determination unit 2 is the highlighter pen portion, THL = 7, THH =
30 is set, and THL = 33 and THH = 52 are set in order to output 1 at the felt-tip pen portion.

FIG. 5 shows an example of the configuration of the filter processing unit 3 in the case of constructing a 3 × 3 pixel matrix. In the figure, LB1 and LB2 are line buffers capable of storing image data for one line, and R1 to R9 are registers for storing a 3 × 3 pixel matrix pattern. The operation of the filter processing unit 3 will be described below with reference to FIG. In the figure, (1) is the image transfer clock CLK, (2) is the line synchronization signal S, (3) is the density determination result N output from the density determination unit 2, and (1) to M1 to M9 are R1 to R9 outputs. , (5) are multi-valued image data V output from the document reading unit 1, and (6) are multi-valued image data V output from the filter processing unit 3. The density determination result N is serially transferred in synchronization with the image transfer clock CLK (1), and R
1, LB1. Image data V is CLK (1)
Is input to the line buffer LB1 in synchronism with. Also C
The concentration determination result N output from LB1 in synchronization with LK (1) is input to R4 and LB2. The image data V and the density determination result N are delayed by one line, and the line buffer LB
1 and the density determination result is output from the line buffer LB2 with a delay of two lines. Further, in synchronization with the transfer of the image data V, the image data input to the registers R1, R4, R7 and the density determination result are registered in the registers R2, R5.
The image data and the density determination result input to the R8 and the registers R2, R5, R8 are stored in the registers R3, R6, R.
9 are sequentially shifted to form a 3 × 3 pixel matrix. In FIG. 5, the broken line represents the image data VD, and the solid line represents the density determination result.

As shown in the circuit example of FIG. 5, the filter processing unit 3 outputs 1 when M1 to M9 are all 1, and outputs 0 when any one of M1 to M9 is 0. This filtering process prevents the density determination unit 2 from making an erroneous determination between the intermediate density portion of the edge portion of the character or graphic and the highlighter pen portion.

FIG. 7 shows a circuit example of the binarization processing section 4. This figure is an example of a circuit for simple binarization processing. Reference numeral 4-1 is a comparator for comparing the multi-valued image data VD and the binarized threshold value TH. The threshold value TH is set by the control unit 7 in the register 4-
Set to 2. The comparator 4-1 outputs 1 when VD ≧ TH.
Is output. Further, in this embodiment, an example of simple binarization processing is shown, but binarization by halftone processing using dither or error diffusion method is also effective.

FIG. 8 is a diagram showing a configuration example of the periodic pattern generating section 5. 5-1 is a quaternary counter, which counts up when the EN input is 0 and a clock is input. E
When N is 1, the counting operation is not performed. 5-2 is a quaternary counter. When LD is 0 and a clock is input to this counter, the initial state is loaded and the QA and QB outputs are 0.
become. When the LD is 1 and the clock is input, the counting operation is performed. 5-3 is a 16 × 1 bi storing a pattern
ROM of t, output D according to addresses A0 to A3
Get. Now, assume that the pattern of FIG. 10 is stored in the ROM 5-3. C0 (0) to C3 (3) are stored in ROM5-
Represents 0 or 1 stored in 3. This operation will be described below with reference to the time chart of FIG. (1) is a clock signal CLK, which operates in synchronization with the rising edge of this signal. (2) is the line synchronization signal S, and the rising edge of this signal is the beginning of the line. (3) represents the outputs Q0 and Q1 of the counter 5-2 in binary numbers. (4)
Represents the outputs Q0 and Q1 of the counter 5-1 in binary numbers. (5) is the output D of the ROM 5-3, which is C0 (0)
~ C3 (3) is 1 or 0. If the output of the counter 5-1 is A2 = A3 = 0 at time t0, then R
C0 (0) from D in synchronization with OM5-3 clock (1)
~ C0 (3) is output. Next, when the line synchronization signal (2) becomes 0 and the clock is input (at the time of t1), the counter 5-1 counts up by 1, and the counter 2 is loaded with the initial state, whereby A2 = 1. , A3 = 0
The ROM5-3 becomes C1 (0) ~ in synchronization with the clock.
Output C1 (3). By repeating the above operation, a 4 × 4 periodic pattern is output from the ROM 5-3. This pattern is C0 (0-3) -C3 (0
~ 3) can be freely set, and the pattern can be stored in the ROM in advance as in this example, or the operator can freely set the ROM 5-3 as the RAM using the operation unit 10. Is. Also R
Capacity of OM or RAM and counters 5-1 and 5-
It is also possible to set a pattern in a larger range by increasing the number of bits of 2.

FIG. 11 is a diagram showing a circuit example of the output processing unit 6. In the figure, 6-1 is a selector and 6-2 is a D flip-flop.

Next, the operation of this embodiment will be described. Although not shown, the image data read by the document reading unit 1 is subjected to shading correction, ABC processing, etc., analog / digital converted, serially transferred, and sent to the density determination unit 2 and the filter processing unit 3. . Concentration determination unit 2
Then, the threshold values THH and THL set by the control unit 7 are compared, and 1 is output to the filter processing unit 3 only when THL <V <THH. The output of R5 of the filter processing unit 3 is binarized by the binarization processing unit 4, and becomes binary image data. The periodic pattern generator 5 generates the periodic pattern as described above. In the output processing unit 6, the selector 6-1 selects either the binarization processing unit 4 or the output of the periodic pattern generating unit 5 according to the output of the filter processing unit 3, and the D flip-flop synchronizes with the image clock. The output binary image of the selector 6-1 is sent to the recording unit.

The recording unit 8 records the image data sent from the output processing unit 6 according to the image clock. The communication control unit 13 transmits the image data sent from the output processing unit 6 according to the image clock.

FIG. 22 under the condition of THL = 7 and THH = 30.
When the manuscript shown in is read, the output image is as shown in FIG. 23, the part where the marker is drawn is replaced with the periodic pattern and is output, and the other part is the binarized result. It becomes an image. Further, since the recording operation is performed in synchronization with the document reading and editing process, the image can be edited and output in real time. THL = 33, T
If HH = 52, the felt-tip pen portion is replaced with the periodic pattern.

An example in which the read image clock and the recording clock are the same has been described above. However, when the clock of the recording unit is slower, a line buffer for speed adjustment is provided between the output processing unit 6 and the recording unit 8. Is provided to absorb the speed difference between reading and recording. In this case, an additional line buffer must be provided, but since the memory capacity is less than the memory for one page,
It does not significantly increase the cost of the device.

Also, in the case of transmission, since the original reading and editing processing and the transmission operation can be performed at the same time, the image memory for one page is not required and the construction can be realized with a simple structure.

(Second Embodiment) FIG. 12 shows a second embodiment of the output processing unit 6. The parts different from the first embodiment will be described below. In the figure, the selector 6-1 selects and outputs either the output result of the filter processing unit 3 or the output result of the periodic pattern generation unit 5 according to the result of the binarization processing unit 4. When the original image shown in FIG. 22 is processed in the state of THL = 7 and THH = 30, the result is as shown in FIG. 24, and the marker portion is output in black and the black character portion is replaced with the periodic pattern and output. Further, since the recording operation or the transmission operation is performed in synchronization with the document reading and editing process, the image can be edited and output in real time.

When the reading unit and the recording unit have different speeds, the line buffer may be provided as described above.

In the configuration of FIG. 12, THL = 33, THH
= 52, the red felt-tip pen part is output in black, and the black part is a periodic pattern (for example, a pattern that looks gray)
Is output. Such processing is effective in a case where the student faxes the answer sheet to the teacher and the teacher faxes the answer sheet corrected with the red pen to the student in correspondence correction education. According to such a process, even if the device on the fax receiving side (student side) can only perform monochrome recording, the red pen portion is conspicuous (the black character portion is originally in the hand of the student, so there is a problem even if it is faintly recorded. No) Recording will be done.

Further, the output processing unit 6 has the circuit shown in FIG.
The circuit shown in FIG. 12 is selected when the correction mode is specified by the operation unit 10 and the THL circuit is selected according to an instruction from the operation unit 10.
Alternatively, the control unit 7 may control so that = 33 and THH = 52.

(Third Embodiment) FIG. 13 is a block diagram showing a third embodiment of the present invention. In the figure, 11 is a determination area setting unit, and 12 is a control signal generation unit that generates a control signal of the output processing unit from the output result of the filter processing unit.

FIG. 14 shows a third embodiment of the output processing section 6. In the figure, 6-1 is an AND gate, 6-
Reference numeral 2 is an inverter, and 6-3 is a D flip-flop.

FIG. 15 is a diagram showing a circuit of the judgment area setting section 11. By setting this determination area, it is possible to prevent erroneous determination of a marker portion written for purposes other than editing. In the figure, 11-1 is a counter, and LD is 0
At the time of, the initial value 0 is loaded in synchronization with the rising edge of the clock. 11-2 and 11-3 are registers, 11-4 and 1
1-5 is the output of the counter 11-1 and the register 11-2,
Comparing the outputs of 11-3 and outputting 1 when they are equal, 11-6 is a JK flip-flop. The operation will be described below with reference to the time chart of FIG. In the figure, the third pixel from the beginning of the line is the start of the judgment area,
An example is shown in which the 10th pixel is the end of the determination region. In the figure, (1) is the image clock, (2) is the line synchronization signal, (3) is the output value of the counter 11-1, (4) is the set value of the register 11-2, and (5) is the register 11-3. Set value, (6) is the output of the comparator 11-4, (7) is the output of the comparator 11-5, and (8) is the JK flip-flop 11
It is the output of -6. The set values of the registers 11-2 and 11-3 are the start and end values of the determination area, and the value is set to RO for each size of the read document or each position in the document.
It may be stored in M or the like. When the line synchronization signal (2) becomes 0, the output (8) of the JK flip-flop becomes 0, and the counter 11-is synchronized with the image clock (1).
The initial value 0 is set in 1. Line sync signal (2)
When is 1, the counting operation is performed in synchronization with the clock (1). Output (3) of counter 11-1 and register 11-
When the set value (4) of 2 becomes equal, the output (6) of the comparator 11-4 becomes 1, and JK is synchronized with the image clock (1).
The Q output (8) of the flip-flop becomes 1. When the output (3) of the counter 11-1 and the set value (5) of the register 11-3 become equal, the output (7) of the comparator 11-5 becomes 1, and the JK flip-flop is synchronized with the image clock (1). Q output (8) is 0. The section in which the Q output (8) of the JK flip-flop is 1 is the range for determining the presence / absence of the marker.

FIG. 17 is a diagram showing a circuit of the control signal generator 12. In the figure, when there is a fixed number of pixels determined to be markers, it is a circuit diagram in the case of outputting the control signal of the next line. In the figure, reference numeral 12-1 is a counter, which counts in synchronization with the rising edge of the clock when the EN input is 1. When the LD input is 0, the initial value is loaded in synchronization with the rising edge of the clock. This counter 1
2-1 outputs 1 from the RCO when the count value exceeds 3 by wiring D1 to D4. Although the hexadecimal counter is shown in the figure, the present invention is not limited to this. Reference numeral 12-2 is a D flip-flop, and when the G input is 0, the value of the D input is Q in synchronization with the rising edge of the clock.
Output to output. The operation will be described below with reference to FIG.
In the figure, the control signal is generated when one line has 10 pixels and the filtering result is 3 pixels or more. In the figure, (1) is an image clock, (2) is a line synchronization signal,
(3) is the output of the filter processing unit 3, (4) is the output of the determination area setting unit 11, (5) is the RCO output of the counter 12-1, and (6) is the Q output of the D flip-flop 12-2. . Now, if there is a marker part on the Nth line,
The output (3) of the filter processing unit becomes 1. While in the judgment area and while the filtering result (3) is 1, the counter 12-
1 counts in synchronization with the image clock (1). The RCO signal (5) of the counter 12-1 becomes 1 when the filtering result is equal to or more than the set value in the judgment area, and thereafter the counting operation is not performed until the end of the line and the state is maintained. When the line synchronization signal (2) becomes 0, the output (6) of the D flip-flop 12-2 becomes 1 at the rising edge of the clock (1), and this output is output during the (N + 1) th line. The counter 12-1 is loaded with the initial value. When the control signal of the next line is output instead of the control signal of the next line, the output of the D flip-flop 12-2 and the RCO of the counter 12-1 are output.
The logical sum of the outputs may be output as the control signal. After that, the same operation is repeated while reading the original.

Next, the operation of the present invention will be described with respect to the differences from the first embodiment. The control signal generation unit 12 generates a control signal from the output result of the filter processing unit 3 by the operation described above. In the output processing unit 6, when the output result of the control signal generation unit 12 is 1, the white pixel is output, and when it is 0, the result of the binarization processing unit 4 is output from the D flip-flop 6-3 in synchronization with the image clock. . That is, when the document image shown in FIG. 25 is processed, the image becomes as shown in FIG. 26, and the line where the marker is drawn outputs the white pixel, and the other part becomes the image where the binarized result is output.

Since the recording operation is performed in synchronism with the document reading and editing process, the image can be edited and output in real time.

When the reading unit and the recording unit have different speeds, the same structure as that described in the first embodiment may be used.

It is also possible to transmit via the communication unit. Also in this case, since the document reading / editing process and the transmitting operation can be performed at the same time, the image memory for one page is not required, and the configuration can be realized with a simple configuration.

(Fourth Embodiment) FIG. 19 shows a configuration example of the output processing unit 6 in the fourth embodiment of the present invention. The parts different from the first and third embodiments will be described below.

In the control signal generator 12, the filter processor 3
A control signal is generated by the operation described above from the output result of 1. In the output processing unit 6, when the output result of the control signal generation unit 12 is 0, the white pixel is output, and when it is 1, the result of the binarization processing unit 4 is output from the D flip-flop 6-3 in synchronization with the image clock. . That is, when the original image shown in FIG. 25 is processed, it becomes as shown in FIG. 27, and the line with the marker is 2
The result of binarization is output, and the other part becomes an image in which white pixels are output.

Since the recording operation is performed in synchronism with the document reading and editing process, the image can be edited and output in real time.

When the speeds of the reading unit and the recording unit are different, the same structure as that described in the first embodiment may be used.

It is also possible to transmit via the communication unit. Also in this case, since the document reading / editing process and the transmitting operation can be performed at the same time, the image memory for one page is not required, and the configuration can be realized with a simple configuration.

(Fifth Embodiment) FIG. 20 shows a fifth embodiment of the output processing section 6. In the figure, 6-1 is an OR gate and 6-2 is a D flip-flop. Only parts different from the third embodiment will be described below. The control signal generation unit 12 generates a control signal from the output result of the filter processing unit 3 by the operation described above. In the output processing unit 6, when the output result of the control signal generation unit 12 is 1, that is, when the pixel determined as the marker is equal to or more than the set value, the line deletion signal is transmitted from the D flip-flop 6-3 in synchronization with the line synchronization signal. Is output. When the line deletion signal is output, the image clock is stopped so that the image is not output for one line. That is, when the original image shown in FIG. 25 is processed, the result becomes as shown in FIG. 28, and the line with the marker is deleted,
The other part becomes an image in which the binarization result is output.
In this case, when the document reading, the image editing and the recording operation are simultaneously performed, the recording operation may be interrupted at the clock stop line. In the case of a recording unit in which the recording operation cannot be interrupted, it is sufficient to read the image, store the image editing result in the memory once, and record the data in the memory in synchronization with the recording operation. In this case, the image memory can be reduced by the number of deleted lines.

(Sixth Embodiment) FIG. 21 shows a sixth embodiment of the output processing section 6. In the figure, 6-1 is an OR gate, 6-2 is a D flip-flop, and 6-3 is an inverter. The parts different from the fourth embodiment will be described below. The control signal generation unit 12 generates a control signal from the output result of the filter processing unit 3 by the operation described above. In the output processing unit 6, when the output result of the control signal generation unit 12 is 0, that is, when the pixel determined to be the marker is equal to or less than the set value, the line deletion signal is transmitted from the D flip-flop 6-3 in synchronization with the line synchronization signal. Is output. Since the image clock is stopped when the line deletion signal is output, the image is not output for one line. That is, when the original image shown in FIG. 25 is processed, the result is as shown in FIG. 29. The binarized result is output for the line where the marker is drawn, and the line is deleted for the other parts. In this case, the original reading,
When the image editing and the recording operation are simultaneously performed, the recording operation may be interrupted at the clock stop line. In the case of a recording unit in which the recording operation cannot be interrupted, it is sufficient to read the image, store the image editing result in the memory once, and record the data in the memory in synchronization with the recording operation. In this case, the image memory can be reduced by the number of deleted lines.

In any of the above-described embodiments, the brightness determining section may be used instead of the density determining section 2.

[0048]

As described above, according to the present invention, the specific color portion is determined from the density data or the brightness data of the image of the read document, the image is edited according to the determination result, and the document is read and the image is edited and recorded. The configuration is such that operations can be performed at the same time, and document reading, image editing, and communication operations can be performed at the same time. Therefore, a simple configuration that does not require an image memory, etc. Therefore, it is possible to provide an image processing device capable of high-speed image editing.

It is also possible to provide a facsimile machine useful for communication correction.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a time chart showing a relationship between a synchronization signal and image data.

FIG. 3 is a diagram showing a configuration of a density determination unit.

FIG. 4 is a felt-tip pen (red). It is a highlighter pen. It is a density histogram of a character portion.

FIG. 5 is a diagram illustrating a configuration example of a filter processing unit.

FIG. 6 is a time chart showing the operation of the filter processing unit.

FIG. 7 is a diagram showing a circuit of a binarization processing unit.

FIG. 8 is a diagram showing a configuration example of a periodic pattern generation unit.

FIG. 9 is a time chart showing the operation of the periodic pattern.

FIG. 10 is a diagram showing an example of a periodic pattern.

FIG. 11 is a diagram showing a circuit of an output processing unit in the first embodiment.

FIG. 12 is a diagram showing a circuit of an output processing unit in the second embodiment.

FIG. 13 is a block diagram showing a third embodiment of the present invention.

FIG. 14 is a diagram showing a circuit of an output processing unit in the third embodiment.

FIG. 15 is a diagram illustrating a circuit of a determination area setting unit.

FIG. 16 is a time chart showing the operation of the determination area setting unit.

FIG. 17 is a block diagram showing a circuit of a control signal generator.

FIG. 18 is a time chart showing the operation of the control signal generator.

FIG. 19 is a diagram showing a circuit of an output processing unit in the fourth embodiment.

FIG. 20 is a diagram showing a circuit of an output processing unit in the fifth embodiment.

FIG. 21 is a diagram showing a circuit of an output processing unit in the sixth embodiment.

FIG. 22 is an image before processing in the first embodiment.

FIG. 23 is an image after processing according to the first embodiment.

FIG. 24 is an image after processing according to the second embodiment.

FIG. 25 is an image before processing in the third embodiment.

FIG. 26 is an image after processing in the third embodiment.

FIG. 27 is an image after processing in the fourth embodiment.

FIG. 28 is an image after processing in the fifth embodiment.

FIG. 29 is an image after processing according to the sixth embodiment.

FIG. 30 is a block diagram showing a configuration of a conventional example.

FIG. 31 is an image diagram of a conventional example before processing.

[Explanation of symbols]

 1 Document Reading Section 2 Density Determination Section 3 Filter Processing Section 4 Binarization Processing Section 5 Periodic Pattern Generation Section 6 Output Processing Section 7 Control Section 8 Recording Section 9 Sync Signal Generation Section 10 Operating Section 11 Judgment Area Setting Section 12 Control Signal Generation Section 13 Communication control section

Claims (9)

[Claims] 1. A reading unit that reads an original and outputs image data for each pixel; a specific color portion of the image data output from the reading unit is discriminated, and data indicating the specific color portion is output. Discriminating means, a filter processing means for filtering the data output from the discriminating means, a periodic pattern generating means for generating periodic pattern data in synchronism with the data output of the reading means, and an output from the reading means. Binarization processing means for binarizing the image data, either data output from the periodic pattern generation means or data output from the binarization processing means in accordance with the data output from the filter processing means. And a data output from the selecting means, and a selecting means for outputting the data in synchronization with the data output of the reading means. The image processing apparatus characterized by comprising: a power unit. 2. A reading unit that reads an original and outputs image data for each pixel; a specific color portion of the image data output from the reading unit is discriminated, and data indicating a specific color portion is output. Discriminating means, filter processing means for filtering the data output from the discriminating means, periodic pattern generating means for generating periodic pattern data in synchronization with the data output of the reading means, and output from the reading means. Any of the data output from the periodic pattern generation means and the data output from the filter processing means in accordance with the data output from the binarization processing means. Selecting means for selecting and outputting in synchronization with the data output of the reading means, and an output for recording or transmitting the data output from the selecting means. The image processing apparatus characterized by comprising a means. 3. A reading unit that reads an original and outputs image data for each pixel, a binarization processing unit that binarizes the image data output from the reading unit, and an output from the reading unit. Judgment means for judging whether or not it is a specific color portion based on the density or luminance of the image data, a filter processing means for filtering the data output from the judgment means, and a filter in synchronization with the data output of the reading means. Conversion means for converting the image data from the binarization means of a line in which data indicating the specific color exists or the next line in accordance with the data indicating the specific color portion output from the processing means into white pixels; An image processing apparatus comprising: an output unit that records or transmits the data output from the conversion unit. 4. A reading unit that reads a document and outputs image data for each pixel, a binarization processing unit that binarizes the image data output from the reading unit, and an output from the reading unit. Judgment means for judging whether or not it is a specific color portion based on the density or luminance of the image data, a filter processing means for filtering the data output from the judgment means, and a filter in synchronization with the data output of the reading means. Depending on the specific color portion output from the processing means, the line in which the data indicating the specific color exists or the next line outputs the image data from the binarization processing means, and the line in which the data indicating the specific color does not exist. Then, it has a converting means for converting the image data from the binarizing means into white pixels, and a means for recording or transmitting the data output from the converting means. The image processing apparatus according to symptoms. 5. A reading unit for reading an image of a document, a judging unit for judging an image having a color in the image read by the reading unit, and a color of the image read by the reading unit by the judging unit. An image which is determined to have the above-mentioned is converted into a black image, and the other images are converted into a predetermined repeating pattern image, and a transmitting means for transmitting the image converted by the converting means by facsimile. A facsimile machine characterized by. 6. The facsimile apparatus according to claim 5, wherein the discrimination unit discriminates an image having a color based on the density of the read image. 7. The facsimile apparatus according to claim 6, wherein the determining means determines that the read image is an image having a color when the density of the read image is between the first density and the second density. 8. The facsimile apparatus according to claim 5, wherein the repeating pattern is a pattern that looks gray. 9. The facsimile apparatus according to claim 5, wherein the conversion unit operates in a correction sheet transmission mode.