JP2694832B2 - Image processing device - Google Patents

Description

The present invention relates to an image processing apparatus. [Prior Art] Conventionally, an image synthesizing device that creates an image by synthesizing a plurality of images
Is known. [Problems to be Solved by the Invention] Image data is combined with a designated area in the above-described apparatus.
In this case, the image data is enlarged / reduced to the desired area.
It is considered to dynamically store the image data. However, in the device described above, for example
If the scaling is not performed at the
There is a blank area when the image data to be processed is small
In that respect, it is inevitable that the synthesis method is still sufficient.
There was a problem that it could not be said. The present invention solves this problem and satisfactorily displays multiple images.
To provide a new image processing device that can be combined
aimed to. [Means for Solving the Problems] In order to solve the above-mentioned object, the present invention generates an image.
Generating means for generating the image generated by the generating means on the combined image.
Area designating means for designating an area to be synthesized when synthesizing into the image
Image region signal generating means for generating a region signal, showing the combined region designated by the region designating means
A synthesized area signal generating means for generating a synthesized area signal, a signal using the image area signal and the synthesized area signal
Based on the processing, the combined area is generated by the generating means.
When the area outside the live image is included, the combined area
Out of the area of the image generated by the generating means
Restriction area that generates a restricted area signal that restricts the area that is made
Area signal generating means, a restricted area region generated by the restricted area signal generating means
Generated by the generating means in a limited area determined by the area signal.
Image synthesis means for synthesizing live images without scaling
It is characterized by having. Embodiment The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a color image forming system to which the present invention is applied.
An example of a schematic internal configuration is shown. This system is as shown
Upper digital color image reading device
1) and digital color image print on the bottom
Device (hereinafter referred to as a color printer) 2 and a printer
The video processing device 3 is included. This color reader 1
The color separation means described later and a photoelectric conversion element such as CCD
The color image information of the manuscript is read for each color and the digital
Convert to a Tal image signal. In addition, the color printer 2
Color images are classified by color according to the digital image signal.
Reproduced and rotated multiple times in a digital dot form on the recording paper
Electrophotographic laser beam color preprint for recording
It is. The video processing device 3 is a video device connected to the outside.
Analog video signal from the device to digital image signal
A device for converting and inputting to the above color reader 1.
is there. First, the configuration of the color reader 1 will be described. 999 is raw
Manuscript, 4 is platen glass on which the original is placed, 5 is halogen
Image of reflected light from the original document scanned by the exposure lamp 10
To collect an image and input an image to the full-size full-color sensor 6
This is a rod array lens, and 5,6,7,10 are original scanning units.
Exposure and scanning are performed in the direction of arrow A1 as a unit as a unit 11.
Color obtained by scanning line by line during exposure scanning
The decomposed image signal is output by the sensor output signal amplification circuit 7.
After the voltage is increased to a constant voltage, the video processing unit is operated by the signal line 501.
Input to the nit for signal processing. 501 is the faithful of the signal
It is a coaxial cable to ensure transmission. Signal 502
A signal for supplying a drive pulse for the full-size full-color sensor 6
Line and the required drive pulses are in video processing unit 12
Are all generated by. 8 and 9 are white level correction of image signal, black
White plate and black plate for level correction, halogen
By irradiating with the exposure lamp 10,
The signal level can be obtained and the white level of the video signal can be supplemented.
Used for positive and black level correction. 13 is a control unit having a microcomputer
This is located on the operation panel 20 by the bus 508.
Display, key input control and video processing unit 12 control
Document scanning unit 11 with position sensors S1 and S2
Position is detected via signal lines 509 and 510, and further on signal line 503.
Stepping motor 14 for moving the scanning body 11 more
Stepping motor drive circuit 15 for pulse driving
Halogen by exposure lamp driver 21 via line 504
ON / OFF control of the exposure lamp 10, light amount control, signal line 505
Control of digitizer 16 and internal keys and display via
All controls of the color reader unit 1 are performed. Original exposure
Scanned by the exposure scanning unit 11 described above during scanning.
The generated color image signal is transmitted through the amplification circuit 7 and the signal line 501.
Is input to the video processing unit 12. Next, referring to FIG. 2, the document scanning unit 11 and
The details of the video processing unit 12 will be described. The color image signal input to the video processing unit 12 is
Sample hold circuit S / H43, G (green), B
It is separated into three colors (blue) and R (red). Separated
The generated color image signal is sent to the analog color signal processing circuit 44.
Analog processing, then A / D conversion, digital
・ It becomes a color image signal. In this embodiment, the document scanning unit is
As shown in FIG. 2, the color reading sensor 6 in the printer 11 is 5
FiFo memory because it is divided into areas and arranged in a staggered pattern
Using 46, 2,4 channels are being scanned in advance, and the remaining 1,
Corrects the misalignment of the reading position of the 3,5 channel. FiF
o The position-corrected signal from the memory 46 is
Input to the road / white correction circuit, the white plate 8 and the black plate described above
Using the signal corresponding to the reflected light from 9
Darkness of the sensor 6 and the light intensity of the halogen exposure lamp 10.
Variations in sensor sensitivity are corrected. Color reading
Color image data proportional to the amount of light input to the sensor 6
In the logarithmic conversion circuit 86 to match the relative visual characteristics of the eyes
More converted and then from Video Interface 101
Color image signal and color image from original scanning unit 11
It is input to the switching circuit 100 that switches signals. Here, from the video processing device 3 in this embodiment,
-Color image data to the video processing unit 12 in the reader 1
The import of data will be described. The settings for such capture can be set in the digitizer described below.
Done by Figure 3 is an external view of the digitizer 16.
You. The key 427 sets the inset compositing mode described later.
The coordinate detection plate 420 is an entry key for
To specify an arbitrary area or set a magnification
Is a coordinate position detection plate of the point pen 421
Is specified. On the coordinate detection plate 420, write on paper etc. from the video processing device.
The size when recorded on the recording material is 100% at the upper right, 200
%, 400% of 3 types are displayed. Inset combining of images from the video processing device 3
After pressing the inset composite key 427 in the figure, point pen 4
Indicate the position to fit by 21. This inset area
Indicates, for example, the shaded area in Fig. 4, which is
The tie shown in FIG. 4 is line by line in the scanning direction A → B section.
It is distinguished from other areas by a signal such as Mingchat SYNC.
You. In addition, C in FIG. 4 indicates the size of the entire document, and the diagonal lines indicate
The assigned part is the part specified by the digitizer.
You. The SYNC signal 104 is the video interface shown in FIG.
It is sent to the bidi processing device 3 through the source 101. In addition to this SYNC signal, the video interface 101 is
Outputs FREEZE signal 102 and VCLK103 to video processing signal 3.
You. The timing chart of these control lines is shown in Fig. 5.
Show. That is, the FREEZE signal 102 and the SYNC signal 104 are operated.
Generated by pressing the start button of part 20, Fig. 5
As shown in, the FREEZE signal 102 does not correspond to pressing the start button.
And becomes “1”, and the SYNC signal 104 is output by the digitizer 16.
It becomes "1" in the range corresponding to the specified area. However, if the number of copies is 1 or more, there may be paper
After an error such as
When the copy button is pressed, the FREEZ signal 102 becomes Active.
It is not "1" and only SYNC104 and VCLK103 are interface
Output to Ace 101. In the present embodiment, FIG.
By repeating the color process as shown in
The color print is done, but of this print
The colors are shown in the figure. Next, regarding the operation of the present embodiment configured as described above
Flow chart of controller (CPU) shown in FIG.
This will be described. When the power is turned on, the controller 13
And the operated key is read on the digitizer 16 (# 0
1). If there is an operated key, that key will start copying
Determine whether it is the key to be instructed (# 03), and specify the copy
If it is the indicated key, branch to # 05, otherwise branch to # 23.
You. Here, the keys other than the copy start key are turned on.
As a matter of fact, # 23 and the following will be explained. In # 23, the third instruction is the area to be embedded.
Determined by switch 427 shown in the figure
However, when instructed, the instructed area is stored (# 2
5) When not instructed, the number of prints is specified.
It is determined whether or not (# 27). As a result of the discrimination, pudding
If the number of prints is set, the set number will be
Write to the register (# 29), if it is not set
Performs processing corresponding to another key input (# 31). Next, in the case where copy start is instructed in # 03
explain. When instructed to start copying, first
Determine whether the error flag is set (# 05), and
If there is no error flag, the FREEZE message described above in FIG. 2 is sent.
Issue No. 102 is generated (# 07). Based on this, it will be described later in FIG.
The image data is written to the memory 303 in the video processor.
Be included. Then reset the error flag (# 0
9). The drive system shown in Fig. 1 is used to drive the scanner.
Instructing the tapping motor drive circuit 15 to start driving.
Due to this, Skyyaner starts to move, and along with it
In synchronization with HSYNC and VCLK, each signal processing cycle shown in Fig. 1 is performed.
The path is operated and each color component of its full color is sequentially
2 is output to the color conversion circuit 50 shown in FIG.
After being processed, it is supplied to the color printer 2. Color
The linter 2 is an image sent sequentially from the video processing unit 12.
The drum 716, which will be described later, is rotated in response to the signal, and one rotation thereof is performed.
The ITOP signal (image leading edge signal) is returned to the unit 12 every time.
In this embodiment, full-color printing with four colors of Y, M, C and Bk
4 times of the drum 716 for one color print.
Rotation is required. Therefore, in # 13, determine whether the ITOP signal has come 4 times.
(# 13), until the ITOP signal arrives 4 times, the printer side
It is determined whether an error has occurred in (# 14) and the error is
If not, return to # 13.If an error occurs, an error
-Set the flag once, stop the scanner drive,
It is determined whether or not the error has been released (# 21). #
One when it is detected that ITOP has come 4 times in 13
Since it is considered that the printing of the
Decrement the star (# 17) and its content becomes "0".
If it is "0", return to, then "0"
If not, return to # 11 and continue the copy operation again.
You. In the embodiment shown in the flow chart described above
Is the color pre-printing process while copying multiple sheets.
If an error occurs due to a paper jam or other
If (# 14), the error returns and the flow returns to
Next copy operation unless the copy start key is turned on.
Is not done. In addition, the error flag is once set in # 19.
Then, turn on the copy start key while returning to the above.
Also, since the flow branches from # 05 to # 11, the flow in # 07
The Leeds signal is not generated, and a new image signal is sent to the memory 303.
It can be prevented from being written. Therefore, free up memory 303 before an error occurs.
Stored image data is stored in the memory 303.
It is possible to prevent other data from being accidentally written.
I can do it. VCLK103 synchronizes image data in video processing unit 12
Signal, which is sent to the video processing device 3.
You. Video processing device 3 is a color image synchronized with VCLK103
Signals 105, 106, 107 and EN signal 1 indicating the effective area of this signal
08 and send to Video Interface 101. This EN signal 108
Is 0, the switching circuit 108 outputs the color from the logarithmic conversion circuit 86.
Select the image signal and output it to the circuit in the subsequent stage, and in the case of 1,
Color image signal from 101 to video interface
Select and output to the circuit in the subsequent stage. As the control signal for switching the switching circuit 100,
It is possible to use the SYNC104 of
In addition, the E from the video processing device 3 is used without using the SYNC104.
Since the switching circuit 100 is switched using the N signal,
The following effects are obtained. That is, switching of the switching circuit 100 using the SYNC signal described above.
When the response of the video processing device 3 is slow,
Color image signal 105,1 from video interface 101
The switching circuit 100 is switched before 06 and 107 are output.
Therefore, when switching the switching circuit 100,
, In other words, black streaks at the edges of the image switching composition.
However, according to the present embodiment, the video interface
Switching circuit 100 is switched by EN signal from Ace 101
Therefore, it is possible to prevent such black streaks from occurring.
I can do it. It should be noted that the video processing device 3 uses a plurality of pixels to
Video processing when image processing such as ridge emphasis is performed
The response of the device 3 will be particularly slow. Next, a detailed circuit diagram of the switching circuit 108 is shown in FIG. This
In the schematic of 113-118 is data like 74LS157 (model name)
Selector, having 2 input data, select terminal
Either of the two input data is selected according to the S signal 112.
You. When signal 112 is 0, selector output OUT Y570, M57
1, Y for C572 line ₀ 120, M ₀ 121, C ₀ 122 selected
When the signal 112 is 1, Y'105, M'106, C'107 are selected.
Selected. This selection signal 112 is different from the EN signal 108 described above.
Controlled by signals 110,111 from controller 13
You. Depending on the settings of the signals 110 and 111, the switching circuit 100 can
Image signal only, reflection original (copying original) image only, inset
It has three functions for composition only. This function is shown in the table below. That is, if the signals 110 and 111 are set to 0, it is specified by the digitizer 16.
The reflection original is trimmed by the area
Image color correction, masking, gamma conversion, etc. according to the signal
Control is performed so that the image can be satisfactorily processed according to the property of the image to be processed.
This EN signal 108 is used for color correction and masking
It is also connected to the path 48 and the gamma conversion circuit 52. Next, returning to FIG. 2, the description will be continued. From switching circuit 110
Signal is input to the black extraction UCR circuit 47 to generate a black component signal.
And the black component signal is subtracted from the color signals 570,571,572.
Is done. The color correction / masking circuit 48 is a color reading sensor.
Color separation filter and video processing device of SA6 (first shown)
The color correction of the color image signal of unit 3 is performed. Here, the operation of the color correction / masking circuit 48 will be described.
Will be described. For each color component image data Yi, Mi, Ci, Masking correction that calculates the primary expression of each color and performs color correction
Is well known. The color correction / masking circuit 48 in this embodiment is
Since the numerical value is variable for the input image, the coefficient value is
It can be set by the CPU via the data bus. In this embodiment, the first matrix coefficient M ₁ , The second matri
Cos coefficient M _Two One of the coefficients of
It is possible to set from the bus that has been saved. M ₁ Is the color separation filter supplement in the original scanning unit 11.
Regular use, M _Two The coefficient of is assigned for correction of the video processing device 3.
Have been. These two coefficients M ₁ , M _Two The video interface
Select by EN signal 108 which is a signal from Ace 101
Is done. That is, the color image from the document scanning unit 11
For image signal M ₁ Of the signal from the video processing device 3
For M _Two Is selected and color correction is performed. Color complement
The output of the positive / masking circuit 48 is input to the color conversion circuit 50.
However, in this embodiment, the function of the color conversion circuit 50 is
It's Lou. 52 is the color balance of the output image in this system,
It is a gamma conversion circuit for controlling the shade of color
In particular, data conversion by LUT (lookup table)
In other words, the LUT of the LUT is associated with the input designation from the operation unit.
The data is rewritten. Further, in the RAM 52 of this embodiment,
Yellow, magenta, cyan, black, MONO and 5 copies
Have at least two types (Fig. 6 (b) A and B).
Area A has a gamma characteristic of A, and area B has a gamma characteristic of B
It can be obtained as a single print by giving it characteristics.
It has such a configuration. Switching between the areas A and B is performed by the video interface 101.
By the EN signal 108 from. The RAM 52 for gamma conversion is specially specified for each color.
The LCD screen on the scanning panel
Controller 13 in association with operation from the touch panel key
Rewritten from Gamma is controlled by the scaling control circuit 53 and the 5-line buffer 54.
The output signal of the conversion circuit 52 is scaled, and further the filter circuit
Edge enhancement and smoothing processing at 55
Is performed. The output of the filter circuit 55 is the printer
It is input to the color printer 2 through the turf-ace circuit 56.
You. As described above, in this system, the digitizer 16
Color from the video processing device 3 at the position specified by the area
While incorporating the image information, the original scanning unit 11
Optimal color correction and gamma correction for each video processing device 3
I do. Next, referring to FIG. 7, the configuration of the video processing device 3 will be described.
Will be explained. In FIG. 7, 300 is a composite signal such as NTSC signal.
NTS that converts the video signal input as a signal into R, G, B signals
C decoder, 301 is RGB input a or NTSC decoder 300?
Switching circuit for selecting one of the R, G, B signals from the
The signals selected by the conversion circuit 301 are A / D separately for R, G, and B respectively.
A / D converter for conversion, 303 A / D conversion by A / D converter 302
The memory to which the written signal is written, at least RG
Each B has a capacity of one frame. 304
Is the edge enhancement for the signal read from the memory 303.
The digital filter, 305, which is smooth or smooth,
Using the signal filtered by the filter 304
An enlargement interpolation circuit for enlarging an image, and 306 is an interpolation circuit 305.
The interpolated RGB signal into Y, M, C signals corresponding to the complementary colors
It is a complementary color conversion table for conversion. 308 is a memory 303 for reading, writing, and refreshing.
It is a memory control circuit that controls operations and addresses. System
Control circuit 308 is input via interface 307 FREE
The memory 303 is set to the write state according to the ZE signal. It should be noted that the control circuit 308 includes a V-side sync signal VDTV363, SY on the TV side
Field discrimination signal FLDTV364 generated from NC circuit 321,
Output of switching circuit 309 Output of SYNC detection circuit 310, selection of enlargement ratio
The output of switch 322 is input. The control circuit 308
The signal generated and triggered by the SYNC signal 104 described above.
The area signal 366 indicating the effective area of the memory 303 is generated.
I do. The switching circuit 309 has the same clock C / TTV361 and H as the TV.
Period signal HDTV362, VCLK103 on the interface side,
SYNC104 is input, and SYNC is detected by the SYNC detection circuit 310.
VCLK103 and SYNC104 are selected when it is detected that
However, when it is detected that there is no SYNC, CKTV or HDTV is selected.
Select. 311 performs logical operation of area signal 366 and SYNC 104
, The gate 312 is in the filter 304 and the expansion interpolation circuit 305.
Delay time to compensate for the delay due to the latch of the data
Roads, 313 to 315 are the files made by the above-mentioned filter 304.
A delay circuit that compensates for the time delay due to
313 has a delay time of 5H and 314 has a delay of 7 pixels.
Have time 315 is an AND gate. 316 ~ 31
8 is when the expansion interpolation operation performed by the expansion interpolation 305 described above
316 is a delay circuit for compensating for the delay.
317 has a delay time of 1 pixel
You. 318 is the data in the complementary color conversion table 306 described above.
This is a delay circuit for compensating the delay due to the latch. The delay circuits 312, 313, 314, 316 and 317 described above are
It is driven by DVCK367 and DVHS368. Selection switch
If the enlargement ratio changes due to 322, DVCK, DVH
Since the cycle of S also changes, the delay time of each delay circuit described above
Will change. 320 is a logic with the above-mentioned SYNC 104 and the output EN1 of the delay circuit 318
It is an AND gate that outputs the product. Next, the operation of the embodiment configured as described above will be described.
I do. The video processing device 3 sends from the video processing unit 2.
Depending on the FREEZE 102 signal input, the input RGB signal a or
Is decoded from the NTSC signal b by the NTSC decoder 300.
One of the obtained RGB signals 355 to 357 is selected by the switching circuit 301.
CKTV signal 361 obtained by the selected SYNC circuit 321
Digitalized by A / D converter 302
In this embodiment, the number of pixels in the memory is
It has 640 x 480 pixels. Read / write RGB memory 303
Memory and control of each timing of refresh operation
The control circuit 308 performs this. SYNC signal from video processing unit 12
When No. 104 is not input, SYNC detection circuit 310 has no SYNC
The synchronization switching circuit 309 determines that the synchronization signal on the TV side, that is, CKTV3
Select 61 and HDTV362. S from video processing unit 12
When the YNC signal 104 is input, the synchronization switching circuit 309 causes VCLK103 and
And SYNC104 are selected, and RGB memory 303 is an interface
Read at the timing of VCLK103 and SYNC104 input via
Will be issued. Enlarge the video image to be embedded in the reflection original 999
There are three types of fixed rates: 100%, 200% and 400%.
Selected by the selection switch 322. This signal is a memory
Enters the control circuit 308 and controls the reading of the RGB memory 303.
You. In the case of 200%, the pixels on the same line are read twice
However, in the case of 400%, the pixels on the same line are read four times.
In addition, the RGB memory 30 at each expansion rate of 100%, 200%, 400%
3, the synchronization of the filter circuit 304, the expansion interpolation circuit 305
Made by memory control 308. DVCK365, DVHS36
It's done by synchronizing to 6. The signal read from the RGB memory 303 is the filter circuit.
304 using matrix operation of 5 × 7 pixels
Filter, edge enhancement or smoothing is performed.
When the enlargement interpolation circuit 305 enlarges x200% and x400%
Interpolation is performed, and the R, G, B signals are
Signal is converted to C107, M106, Y104 signals respectively
-Video processing unit through interface circuit 307
Passed to To 12. In this embodiment, read from the RGB memory 303
Each RGB data is filtered by the filter circuit 304 and the expansion interpolation circuit.
305, so-called pipeline passing through the complementary color conversion table 306
Data is processed by each circuit because it is processed by the structure.
There is a time delay between the input and the output of
I will mess up. That is, as described above, there are a plurality of video processing devices 3.
Since the image output is instructed to process the stairs of
It takes a certain amount of time to output it. This delay
In this embodiment for adjusting the time, the EN signal 108 is
I am trying to generate it. Delay circuit 312,314,317,318,
By delay circuits 313 and 315 in the line direction and gates 315 and 318
As much as the delay time in each circuit 303, 304, 305, 306
After delaying, each C107, M106, Y105 signal outputs valid image data.
The EN signal 108 outputs a valid signal according to the output period.
Power. In the odor of this embodiment, the mesh ratio (1
As the aspect ratio of pixels is set to 1: 1, 640 x 480 pixels
I have. And this is 100% or 200% or 400%
Output image data to enlarge at any rate
doing. At this time, S input to interface 307
The YNC signal 104 has the same size as the enlarged image data.
There is no guarantee that it will be entered as an issue. For this purpose,
The memory control circuit 308 that controls the memory 303 receives the SYNC signal 104.
The size of the image to be read out, 640 x 480 images
Raw (or 1280 x 960 pixels at 200% magnification, 2560 at 400% magnification)
The image area signal 366 indicating (× 1920 pixels) is output. Soshi
Lever area signal 366 and SYNC signal 104 by gate 311
ANDed and simultaneously delayed by each delay circuit
Output EN1 signal 371 (output of delay circuit 319) and SYNC signal 104
Is ANDed by the gate 320. This allows SYN
The C signal area, that is, the area to be fitted is the image output.
When it is larger than the force area
The area of signal 108 is limited and conversely the area of SYNC signal 104 is small.
At the time of opening, even if the area of the image is still left, SYNC is forced.
Limit to the signal area. Eighth regarding these operations
(A) and (b) of FIG. In Figure 8, (a) is the area
When the time width of the SYNC signal is larger than the range signal, that is,
Should be inset rather than the size of the image to be inset
If the area is larger, (b) fits in the opposite
If the area to be filled is larger than the image to be fitted
SYNC signal 104, area signal 366, ENo signal 370, EN
Signal 108 and image data 105-107 are shown. The time indicated as D in the 8th shots (a) and (b)
It is delayed by the delay means 212 to 318 in FIG.
It is showing the time. In the filter circuit 304, 5 lines x 7 screens as described above.
Set up a plain window and play the value of each pixel in this window.
Calculated to form a filter. For this reason the active screen area
The area is reduced by one to several lines, but this is almost a problem.
There is no title. Delay circuits 316, 317 and expansion interpolator 305
The same applies to the gate 318. Next, it is output after image composition is performed using FIG.
The explanation will be given on the printed image. By digitizer 16
Specify the area where the video image is to be fitted with two points a and b
You. SYNC signal 104 is video according to this designated area
It is output from the processing unit 12 to the video processing device 3. Bi
In the video processing device 3, the video image C10 is displayed in this area.
Output each signal of 7, M106, Y105 to the video processing unit 12.
You. At this time, it is specified by the digitizer 16 as shown in Fig. 9 (a).
Indicates the effective area of the video image when the area covered is large
The EN signal 108 is output by the video processing device 3, and the video processing unit 3 outputs the EN signal 108.
In the Nit 12, the video image is displayed only in this EN signal 108 area.
And the outer area is mounted on the color reader 1.
Printed original 999. On the contrary, it is shown in Fig. 9 (b).
Area a-b specified by the digitizer 16
When smaller than the effective area of the image, the SYNC signal 104
The area to be embedded and combined is specified. This results in a hatch
Video image is embedded and composited in the region
You. The RGB memory 303 of this embodiment is, for example, a D-RAM.
Because it uses memory, keep the stored contents.
To do this, an operation called refreshing is necessary. Normal
When the memory contents are held or when the FREEZE signal 102
Input video signal (RGB or NTSC signal) to RGB memory
When writing to the memory 303 or holding the written data
The HDTV signal 362 according to the timing.
Create a push signal and sync signal from video processing unit 12
When 104 is input and the memory is being read, SYNC
Depending on the timing of signal 104, the signal for refresh
Making At this time, the cycle of HDTV signal 362 and SYNC signal 104
Is significantly different (in this embodiment, the HDTV signal 36
(The cycle of 2 and the cycle of SYNC signal 104 are about 4 times different)
The number of refreshments per change is changed for each. Next, regarding the configuration of the memory control circuit 308 described above,
This will be described in detail with reference to the drawings. In Fig. 12, SCK (SLECTFD CLOCK) SHS (SLECTED H
ORIZONTAL SIGNAL) is switched by the switching circuit 309 described above.
This signal is obtained and is input to the memory control circuit 308. 370
Corresponds to the setting of the enlargement ratio setting switch 322 shown in FIG.
The 372 is 370
Similarly, it is a frequency divider in which the division ratio for dividing the SHS changes. Three
74 is a quaternary counter for counting the output of the frequency divider 370, 376
Is a counter for counting addresses in the main scanning direction, 378
Is a counter for counting addresses in the sub-scanning direction, 380
Is the ratio that compares the output of counter 376 with the exit of region value 382.
The comparator 384 compares the output of the counter 378 with the output of the area value 386.
It is a comparator to compare. 382 and 386 are the image memory 303, respectively.
A value corresponding to the number of pixels in the horizontal and vertical directions of
Have been. Therefore, one of the outputs of comparators 380 and 384 is L level.
When it becomes, the output of gate 388 also becomes L level
The signal also becomes L level. 390 is a 2-bit output of the quaternary counter 374 and is shown in FIG.
Create signals (B), (C), and (D) shown in (a)
It is a logic circuit. In addition, (B) is RAS (Row Address Str
obe), (C) is CAS (Colum Address Strobe), (D)
Is a signal for switching the selector 391 described later. 391
Is the output counter of the counter 376 according to the (D) signal described above.
Switch one of the outputs of the
And the selector 392 for outputting the signal is the above (B), (C) signal.
No. or for refreshing (C) shown in FIG. 13 (b),
(D) A selector that outputs a signal to the memory 303. 393
Receives the SHS signal from the switching circuit 309 via the inverter 397.
It is the D-FF to be taken in, and its output is of the quaternary counter 395.
It is connected to the enable terminal. Is 395 the switching circuit 309?
Is a quaternary counter that counts SCK signals from
The output of the counter 395 with 2 bits is shown in FIG. 13 (b).
This is a logic circuit that produces the signals (C) and (D).
396 is enabled according to the output of the quaternary counter 395.
It is a counter and has SYNC by the SYNC detection circuit 310.
When this is detected, “32” is set and SYNC is not
"8" is set when it is detected that the SCK signal
Is a counter that counts down according to
Output is connected to the clear terminal of D-FF393.
AND gate 398,400 and inverter 399 are controllers
13 Read / write signal from / W (FREEZE signal 102
FLD signal from the SYNC circuit 321 shown in FIG.
Select whether to enable JK-FF368 according to the
Change. 401 is the output Q of JK-FF368 or OR of / W
Input to the enable terminal of the counter 378.
The gate. Regarding the operation of the memory control circuit 308 configured as described above,
Will be described. First, when the controller 13 gives a writing instruction,
The case will be described. In this case from controller 13
/ W signal of is at H level and the counter 378 enables
The output Q of the JK-FF368 becomes the level of the FLD signal.
Decide according to The JK-FF368 and the counter 378
It shows the vertical address of memory 308, JK-FF368
Is output to the least significant bit of vertical address, counter 378
All other bits are assigned to the output of
You. Therefore, the FLD signal is at the L level, that is, the odd field.
Output, the output Q of JK-FF is fixed to H level and
Only odd-numbered addresses are output as direct addresses.
It is. On the contrary, if the FLD signal is at H level, that is, even field
In this case, the output Q of JK-FF368 is fixed to L level,
Only the even address is output as the vertical address.
It is. On the other hand, the frequency dividing circuit 370, the quaternary counter 374, the counter 376
Generates a horizontal address. The horizontal and vertical addresses generated in this way are assigned to the logic circuit 39.
Selected by the selector 391 according to the output of 0
It is output as a readdress. Horizontal generated in this way
RAS and CAS are shown in Fig. 13 (a) in synchronization with the vertical address.
Occurs, and writing is performed. In this case, select
Kuta 392 outputs the signal on the side of logic 390 to memory 303.
You. Next, the signal for reading is generated from the controller 13.
The case of doing so will be described. In such a case, the / W signal becomes L level, and JK-FF36
The output of 8 does not depend on the FLD signal, and JK-FF368 and counter 378
Will make up one counter. Therefore, the calligraphy
Unlike the time of imprinting, the vertical address is incremented by "1".
Is mentioned. When reading, the SHS signal falls and the
When the blanking period is reached, the output of D-FF393, that is,
▲ ▼ / refresh signal is inverted to H level
Mori 303 becomes refreshed. In this case selector 3
92 is the RAS made in the logic circuit 394 for refreshing
Output γ and CAS γ (shown in FIG. 13 (b)) to the memory 303.
It becomes like. This automatically refreshes the memory 303.
Perform a movement. Further, in this case, the counter 396 is provided with the SYNC detection circuit 310.
The value corresponding to the signal of is set. As an example of this value
For example, if the SYNC detection circuit detects that SYNC is present,
If "32" is not found, "8" is set.
It is. This is the same as the HDTV signal 362 and SYNC signal 104 as described above.
Due to the large difference in the cycle, the refresh operation
This is because there is a need to change the imming. When reading, the frequency division ratio of the frequency dividers 370 and 372 is
The value is set according to the enlargement ratio, and the
Increase the cycle of the pulse output to the input terminals 376 and 378. Ma
The specified area value from the digitizer and the value from 382,386
From gate 388 depending on the comparison of outputs from unta 376,378
The area signal 366 is output. Then, it was processed by the video processing unit 12 as described above.
First, the configuration of the color printer 2 that prints image signals
This will be described with reference to the drawings. In FIG. 1, reference numeral 711 is skyana
Yes, convert the image signal from color reader 1 to optical signal
Laser output unit, polygon of polyhedron (eg octahedron)
Mirror 712, motor that rotates this mirror 712 (not shown
Shown) and an f / θ lens (imaging lens) 713 and the like. 7
14 is a reflection mirror that changes the optical path of laser light, 715 is photosensitive
It is a drum. The laser light emitted from the laser output section is
Reflected by Rigon Mirror 712, lens 713 and mirror 71
Scan the surface of the photosensitive drum 715 linearly through 4 (raster
Then, a latent image corresponding to the original image is formed. Also, 717 is a primary charger, 718 is an overall exposure lamp, 723
Is a cleaner section for collecting the residual toner not transferred,
724 is a pre-transfer charger, and these members are the photosensitive drum 7
It is located around 15. 726 by laser exposure
To develop the electrostatic latent image formed on the surface of the photosensitive drum 715.
731Y (for yellow), 731M
(For magazine), 731C (for cyan), 731Bk is photosensitive drum 7
730Y, 730M, 73 developing sleeve that directly contacts with 15
0C and 730Bk are toner hoppers that hold spare toner,
732 is a screen for transferring the developer,
Sleeves 731Y-731Bk, toner hoppers 730Y-730Bk
And screen 732 form a developing unit 726.
These members are placed around the rotation axis P of the developing unit.
It is arranged. For example, forming a yellow toner image
When developing, perform yellow toner development at the position
Printer unit unit 726 when forming a toner image
Rotate around the axis P in the figure to move it to the position where it contacts the photoconductor 715.
The developing swivel 731M in the magenta developing unit is arranged.
The development of cyan and black operates similarly. Further, 716 is a toner image formed on the photosensitive drum 715.
719 is a transfer drum 716, which is a transfer drum for transferring onto paper.
Actuator plate for detecting the moving position of
By moving the actuator plate 719 close to it, the transfer
Detects that the ram 716 has moved to the home position
Position sensor, 725 is transfer drum cleaner, 727
Is a paper pressing roller, 728 is a static eliminator, and 729 is a transfer charger.
Yes, these members 719,720,725,727,729 are the transfer roller 7
It is located around 16. On the other hand, 735 and 736 are paper feeding cassettes for storing paper (paper sheets).
, 737,738 is the paper feed from cassette 735,736.
Paper rollers, 739,740,741 are the timings for feeding and conveying
Is a timing roller that feeds paper through these
The conveyed paper is guided to the paper guide 749, and the leading edge of the paper is described later.
Wrapped around the transfer drum 716 while being carried by the gripper,
The process proceeds to the image forming process. Further, 550 is a drum rotation motor, which rotates with the photosensitive drum 715.
The photo drum 716 is rotated synchronously. 750 ends the image formation process
After that, remove the paper from the transfer drum 716.
Conveyor belt that conveys the removed paper, 743 conveys
Image fixing unit that fixes the paper conveyed by belt 742
The image fixing unit 743 includes a pair of thermal pressure rollers 744 and 74.
With 5. According to the above configuration, first, the photosensitive drum 71 is irradiated with laser light.
A latent image of Y is formed on the surface of the development unit 731Y.
Is not developed and then transferred to the paper on the transfer drum.
Then, the developing unit 726 rotates about the axis P in the figure.
You. Next, an M latent image is formed on the photosensitive drum by laser light.
Then, the same operation is performed thereafter. This operation is connected to C, Bk
Repeat the same procedure, and peel it off after the image formation process is completed.
The paper is peeled off by the release claw 750, and fixed by the image fixing unit 743.
Then, the color image is printed. In the embodiment described above, the area where the screen is fitted
The digitizer shown in Fig. 3 is used to specify the
Image of a certain size that should be fitted in the area
The video processing device 3 is a means for supplying the. In addition, the area specified by the specifying means and the supply
Small of the areas of the image supplied by the means
The digitizer has a method to prioritize the areas and combine them
Therefore, the specified area and the image from the video processing device 3
Only the smaller area from the video processor
Control the switching circuit 100 by combining images.
did. [Advantages of the Invention] As described above, according to the present invention, a generation process that generates an image is performed.
The image generated by the generating means is a composite image.
Area designation means for designating an area to be synthesized when synthesizing on,
An image area showing the area of the image generated by the generating means.
Image region signal generating means for generating a region signal, said region designation
A synthesized region signal indicating the synthesized region designated by the means
Area signal generating means for generating an image area signal
And based on signal processing using the synthesized region signal,
The combined area is an area of the image generated by the generating means.
In the case of including the outside, the generating means in the combined area
Limits the areas that are considered outside the area of the image generated by
Restricted area signal generating means for generating a restricted area signal
Restricted area signal generated by the restricted area signal generating means
Generated by the generating means in a restricted area determined by
Image synthesizing means for synthesizing images without scaling.
Therefore, the method of combining images after scaling them
It prevents the occurrence of image deterioration due to the
Out of the area of the image generated by the generating means
In the combined area that occurs when the area
Good for preventing the occurrence of areas other than the image area (creating gaps)
Synthesis can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a schematic internal configuration of a color image forming system to which the present invention is applied, and FIG. 2 is a diagram showing a configuration of a document scanning unit 11 and a video processing unit 12 shown in FIG. The block diagram shown in FIG. 3, FIG. 3 is an external view of the digitizer 16 shown in FIG. 1, FIG. 4 is a diagram showing a fitting area, and FIG. 5 is a FREEZE signal output from the video interface 101 to the video processing device 3. 102, VCLK103, SYNC signal 104
FIG. 6 is a timing chart showing the two types of gamma characteristics of the RAM 52 shown in FIG. 2, FIG. 7 is a block diagram showing the configuration of the video processing device 3 shown in FIG. 1, and FIG. (A) and (b) are video processing devices 3 shown in FIG.
9 (a) and 9 (b) are diagrams for explaining a print image output after screen composition is performed in the apparatus of the present embodiment, and FIG. 10 is FIG. 11 is a block diagram showing the internal structure of the switching circuit shown in FIG. 11, FIG. 11 is a timing chart for explaining the operation of the controller 13 shown in FIG. 1, and FIG. 12 is a timing chart of the memory control circuit 308 shown in FIG. Block diagrams showing the configuration, and FIGS. 13 (a) and 13 (b) are memory control circuits 30 shown in FIG.
8 is a timing chart for explaining the operation of FIG. 1 ... Color reader, 2 ... Color printer, 13 ... Controller.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Takayuki Komine               770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa               Inside the Tamagawa Office of Canon Inc. (72) Inventor Yasumichi Suzuki               3-30-2 Shimomaruko, Ota-ku, Tokyo               Inside Canon Inc.                (56) References JP-A-57-48860 (JP, A)

Claims (1)

(57) [Claims] Generating means for generating an image, area specifying means for specifying a combined area when combining the image generated by the generating means on a combined image, image area indicating an area of the image generated by the generating means Image area signal generating means for generating a signal, combined area signal generating means for generating a combined area signal indicating the combined area specified by the area specifying means, using the image area signal and the combined area signal On the basis of the signal processing, when the combined area includes an area outside the image generated by the generating means, an area of the combined area that is considered to be outside the area of the image generated by the generating means is selected. A restricted area signal generating means for generating a restricted restricted area signal; and a limiting area determined by the restricted area signal generated by the restricted area signal generating means by the generating means. The image processing apparatus characterized by having an image combining means for combining without zooming the image to be generated.