CN100399797C - Image display enhanced system - Google Patents
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- CN100399797C CN100399797C CNB2005100877527A CN200510087752A CN100399797C CN 100399797 C CN100399797 C CN 100399797C CN B2005100877527 A CNB2005100877527 A CN B2005100877527A CN 200510087752 A CN200510087752 A CN 200510087752A CN 100399797 C CN100399797 C CN 100399797C
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- 239000000872 buffer Substances 0.000 claims description 17
- 238000007792 addition Methods 0.000 claims description 10
- 241001269238 Data Species 0.000 claims description 8
- 238000010606 normalization Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
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- 238000005728 strengthening Methods 0.000 abstract description 3
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Abstract
This invention relates to an image display strengthening system including an image signal pick-up unit used in picking up continuous image data from input image signals, a first signal group process unit processing it to image data of the first signal group, a high pass and low pass image component pick-up unit picking up high and low image components, a brightness adjusting unit for adjusting the brightness of the low pass image component, a threshold selection unit for processing high pass image component noises, an amplification unit for strengthening non-noise images, an adder used in adding the processed high and low pass images and a normalized unit normalizing the images got by the adder to recover the size and get the iomage to be processed.
Description
Technical field
The present invention relates to a kind of image display enhanced system, particularly relate to the complete reconstruction filter (Perfect reconstruct filter bank) that a kind of utilization can independent single processing resolution, and tool is to be embodied as hardware structure, to reach image display enhanced purpose.
Background technology
Because popularizing of video product allows people enjoy the beautiful acousto-optic world that product brought of sound and image combination.The quality of audio and video products except the specification number of literal upward product, the more important thing is the quality of image of product, and the quality of image that influences product also has the display system of back segment image except the sensing system in acquisition video signal source.Yet no matter be leading portion system or back segment system, all need an image processing system allow image clear and natural more.
Generally speaking, the technology of handling image commonly used is exactly to handle image through various filter, for example utilize low-frequency filter to eliminate image noise, through the processing of high frequency filter the details of image is increased apparently, help the user via these processing and appreciate the better quality of image.
As shown in Figure 1, flow process for known image processing, it can handle image through a low pass filter 10 and high pass filter 12, utilize the characteristic of low pass filter 10 to eliminate noise, again the image of handling through low pass filter 10 is handled via high pass filter 12, and by a gain control unit 14 it is increased apparently, come resultant image with an adder 16 more at last, to reach the purpose of beautifying image.The selection of common low pass filter has the practices such as Gaussian filter and median filter, and the design of high pass filter is generally an edge detection filter, for example sobel.Can influence the degree and the Noise Suppression degree of the loss of image detail on the conventional architectures at low pass filter, if too serious with noise removing, then can cause image detail to disappear, the rear end high pass filter can't present image detail is complete, if noise removing very little, cause the processing of back high pass filter can increase apparent noise, amplify The noise, cause the quality of image not good.
And for example, utilize multiple resolution filter to resolve image, be used for handling the device of image noise and high frequency image detail, increase apparent image though can draw through improving, its amount of calculation is huge, the computing too complex, and need a large amount of computing and memory storage.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of image display enhanced system, utilization can independent single processing resolution complete reconstruction filter (Perfect reconstruct filter bank), and tool is to be embodied as hardware structure, to reach image display enhanced purpose, can reach the purpose of improving the quality of image with the use amount of less operand and internal memory.
To achieve these goals, the invention provides image display enhanced system of the present invention and include a signal of video signal acquisition unit, be used for three pending input signal of video signal, the acquisition continuous image data coldest days of the year end; One first ensemble processing unit, high pass and low pass filter according to selecting for use are processed into one first ensemble image data; A high pass low pass image composition acquisition unit, high pass and low pass filter according to selecting for use capture a high pass image composition and a low pass image composition; A brightness adjustment unit is used for adjusting the brightness of this low pass image composition; A threshold selected cell is used for handling the noise of this high pass image composition; An amplifier unit is used for increasing the image that shows non-noise section; An adder is used for this high pass image composition and this low pass image composition addition that will handle; And a regular unit, be used for this image normalization that this adder is obtained, restoring its size, and obtain the image that desire is handled.
The present invention also provides a kind of image display enhanced method, and its step includes:
Handle three signal of video signal of input continuously with displacement mode, and obtain 9 image datas.
With aforementioned 9 image datas obtaining,,, and obtain one first ensemble with 3 image data additions according to the form of high pass and low pass filter.
This first ensemble image data according to the high pass filter coefficient, is obtained the image data radio-frequency component.
This first ensemble image data according to low-pass filter coefficients, is obtained the image data low-frequency component.
The image data radio-frequency component done that noise removing is handled and image detail increases to show and handles.
The image data low-frequency component is done the brightness adjustment.
Image data radio-frequency component and the addition of image data low-frequency component with handling increase the signal of video signal that showed and obtain one.
For enabling further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, but appended graphic only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Fig. 1 is common image processing schematic diagram;
Fig. 2 is an image display enhanced system configuration diagram of the present invention;
Fig. 3 is an image display enhanced system hardware circuit schematic diagram of the present invention;
Fig. 4 A, Fig. 4 B, Fig. 4 C, Fig. 4 D are image display enhanced system high pass of the present invention and low pass filter parameter schematic diagram;
Fig. 5 A is applied to first stratum's image capture schematic diagram for image display enhanced system of the present invention;
Fig. 5 B is applied to second stratum's image capture schematic diagram for image display enhanced system of the present invention; And
Fig. 6 is the image display enhanced method flow diagram of the present invention.
Wherein, Reference numeral:
10 low pass filters
12 high pass filters
14 gain control units
16 adders
22 high pass filters
24 low pass filters
26 thresholds
28 gains
30 brightness adjustment units
32 adders
34 regular unit
40 signal of video signal acquisition units
401 buffers
42 ensemble processing units
421 three to two adders
423 buffers
425 shift units
427 inverters
44 high pass low pass image composition acquisition units
441 three to two adders
443 buffers
445 inverters
46 brightness adjustment units
48 threshold selected cells
481 thresholds
483 three to two adders
485 buffers
50 amplifier units
501 buffers
52 adders
54 regular unit
60 image datas
62 image datas
Embodiment
Please refer to shown in Figure 2, be the schematic diagram of image display enhanced system framework of the present invention, include a stratum and select index 20, be used for selecting the image stratum that handles, make this image display enhanced system can directly handle arbitrary stratum image, simplify the complexity and the operation time of calculating; One high pass filter 22 and a low pass filter 24 are linked to this stratum and select index 20, are used for capturing input image radio-frequency component and low-frequency component; One threshold 26 is linked to this high pass filter 22, is used for handling this high frequency image ingredient noise; One gain 28 is linked to this threshold 26, is used for strengthening the image detail of this high frequency image composition; One brightness adjustment unit 30 is linked to this low pass filter 24, is used for adjusting the brightness of this low frequency image composition; One adder 32 is linked to this gain 28 and this brightness adjustment unit 30, is used for adding up this image radio-frequency component and this image radio-frequency component, and obtains an image; And a regular unit 34, be linked to this adder 32, be used for this image normalization that this adder is obtained, restoring its size, thereby obtain the image that desire is handled.
Wherein this high pass filter 22 and low pass filter 24, include a low pass filter and three high pass filters, the parameter of its high pass filter 22 and low pass filter 24 can be shown in the 4th A, four B, four C and the four D figure, also can be changed on number and parameter according to actual demand.And the number of threshold 26 and gain 28 cooperates the number of high pass filter.
Please refer to shown in Figure 3ly, be the hardware circuit schematic diagram of image display enhanced system of the present invention.Image display enhanced system of the present invention includes a signal of video signal acquisition unit 40, is used for three pending input signal of video signal, and the acquisition continuous image data coldest days of the year end can be made of a plurality of buffers 401.Then with the first ensemble processing unit 42, be linked to this signal of video signal acquisition unit 40, form according to high pass filter of selecting for use and low pass filter, be processed into one first ensemble image data, include a plurality of shift units 425, a plurality of inverter 427, a plurality of three to two adders 421 and a plurality of buffer 423, wherein this three to two adder 421 sees that than binary storage adder (3: 2 Carry Saver Adder) and carry adder (Carry Lookahead adder) constitutes by three in advance.
One high pass low pass image composition acquisition unit 44, be linked to this first ensemble processing unit 42, form according to high pass filter of selecting for use and low pass filter, capture a high pass image composition and a low pass image composition, wherein this high pass low pass image composition acquisition unit 44 includes a plurality of inverters 445, a plurality of three to two adders 441 and a plurality of buffer 443.
One brightness adjustment unit 46 is linked to this high pass low pass image composition acquisition unit 44, is used for adjusting the brightness of this low pass image composition, and wherein this brightness adjustment unit 46 needs two execution cycles, also can be two buffers.
One threshold selected cell 48 is linked to this high pass low pass image composition acquisition unit 44, is used for handling this high pass image ingredient noise, and this threshold selected cell 48 wherein includes a plurality of threshold 481, three to two adders 483 and a buffer 485.And the value of threshold selected cell 48 needs to add the difference that replaces subtracter with inverter, is 6,6 and 4 with present embodiment.
One amplifier unit 50 is linked to this threshold selected cell 48, is used for increasing showing non-noise section image, also can include a buffer 501; With an adder 52, be linked to this amplifier unit 50 and brightness adjustment unit 46, be used for this high pass image composition and this low pass image composition addition that will handle; And a regular unit 54, be linked to this adder 52, be used for this image normalization that this adder is obtained, restoring its size, and obtain the image that desire is handled.
The handling process of the hardware circuit of above-mentioned image display enhanced system is described as follows, at first utilize 9 buffers 401 the data X1 of three images of input, X2, X3, X4, X5, X6, X7, X8 and X9 store away, and then with three to two adders 421 (3: 2 Carry Saver Adder and Carry LookaheadAdder), and shift unit 425, inverter 427 is realized 6 additions, the first ensemble image data that adds up out respectively is as Y1=X1+2*X4+X7, Y2=2*X2+4*X5+2*X8, Y3=X3+2*X6+X9, Y4=~ X1+2*X4+ (~ X7), Y5=2* (~ X2)+4*X5+2* (~ X8) and Y6=~ X3+2*X6+ (~ X9).Next continue the result that adds up and just calculated again with three to two adders 421 (3: 2carry Saver Adder and Carry Lookahead Adder) and inverter 445 again, add up respectively and obtain Y1+Y2+Y3, ~ Y1+Y2+ ~ Y3, Y4+Y5+Y6 and ~ Y4+Y5+ ~ Y6, be image radio-frequency component and low-frequency component, but should be noted that second, the 3rd and the 4th 's result and result originally can differ 6,6,4, this is because subtraction originally reverser 425,427 replace, so must move on to these differences the threshold 481 Rule of judgment the inside of back, its implementation formula is the threshold value skew and judges that the place of negative value has been offset just, at last the comparison of three results of high frequency through threshold, filtering high-frequency noise add up mutually more at last, after an adjustable gain amplification, with the results added of originally low frequency, just obtain one and increase the image that showed again.
Above-mentioned use three to two adders 421,441 (3: 2Carry Saver Adder and CarryLookahead Adder) obtain the first ensemble image data and image radio-frequency component and low-frequency component, selecting for use and configuration of this shift unit, inverter and three to two adders wherein determines according to the number of selected high pass and low pass filter, parameter value.
Image display enhanced system of the present invention, more include a stratum and select index 20, be linked to before this signal of video signal acquisition unit, in order to select to handle image stratum, make this image display enhanced system can directly handle arbitrary stratum image, simplify computation complexity and operation time.Shown in Fig. 5 A, for image display enhanced system of the present invention is applied to first stratum's image capture schematic diagram, shown in Fig. 5 B, for image display enhanced system of the present invention is applied to second stratum's image capture schematic diagram, adopt the mode of Fig. 5 A and Fig. 5 B, capture image data 60,62, cooperate stratum to select index 20 again, make this image display enhanced system can directly handle arbitrary stratum image, simplify computation complexity and operation time.
Utilize the 4th A, four B, the image that the high pass of four C and four D figure and low pass filter combination are generated, if threshold is handled and is set at 0, amplifier is set at 1, and brightness adjustment (Gamma letter formula) is set at 1, it is equal fully then to import image and image output, this is complete reconstruction filter combination (perfectreconstruct filter), utilize this filter combination to handle image, except not allowing image distortion, more can be directly deal with at the noise and the image detail of different frequency, except eliminating the noise that different resolution occurs, more can increase the image detail that shows different resolution, and operand does not more need unnecessary internal memory to store the result of different resolution than significantly reducing originally yet.
The present invention also provides a kind of image display enhanced method, and as shown in Figure 6, its step includes:
Handle three signal of video signal of input continuously with displacement mode, and obtain 9 image datas (step S100).
With aforementioned 9 image datas obtaining,, 3 images are counted addition, and obtain one first ensemble (step S102) according to the form of high pass and low pass filter.
This first ensemble image data according to the high pass filter coefficient, is obtained image data radio-frequency component (step S104).
This first ensemble image data according to low-pass filter coefficients, is obtained image data low-frequency component (step S106).
The image data radio-frequency component done that noise removing is handled and image detail increases to show and handles (step S108).
The image data low-frequency component is done brightness adjustment (step S110).
Image data radio-frequency component and the addition of image data low-frequency component with handling increase the signal of video signal (step S112) that showed and obtain one.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. an image display enhanced system is characterized in that, comprising:
One signal of video signal acquisition unit is used for three pending input signal of video signal, the acquisition continuous image data coldest days of the year end;
One first ensemble processing unit is linked to this signal of video signal acquisition unit, and high pass and low pass filter according to selecting for use are processed into one first ensemble image data;
One high pass low pass image composition acquisition unit is linked to this first ensemble processing unit, and high pass and low pass filter according to selecting for use capture a high pass image composition and a low pass image composition;
One brightness adjustment unit is linked to this high pass low pass image composition acquisition unit, is used for adjusting the brightness of this low pass image composition;
One threshold selected cell is linked to this high pass low pass image composition acquisition unit, is used for handling the noise of this high pass image composition;
One amplifier unit is linked to this threshold selected cell, is used for increasing apparent non-noise section image;
One adder is linked to this amplifier unit and brightness adjustment unit, is used for this high pass image composition and this low pass image composition addition that will handle; And
One regular unit is linked to this adder, is used for this image normalization that this adder is obtained, restoring its size, and obtains the image that desire is handled.
2. according to the described image display enhanced system of claim 1, it is characterized in that, also include a stratum and select index, be linked to before this signal of video signal acquisition unit, be used for selecting processing image stratum, make this image display enhanced system can directly handle arbitrary stratum image, simplify computation complexity and operation time.
3. according to the described image display enhanced system of claim 1, it is characterized in that, this signal of video signal acquisition unit includes a plurality of buffers, and this brightness adjustment unit includes two buffers, and this high pass and low pass filter include a low pass filter and three high pass filters.
4. according to the described image display enhanced system of claim 1, it is characterized in that, this first ensemble processing unit, include a plurality of shift units, a plurality of inverter, a plurality of three to two adders and a plurality of buffer, wherein this three to two adder sees that than binary storage adder and carry adder constitutes by three in advance.
5. according to the described image display enhanced system of claim 1, it is characterized in that, this high pass low pass image composition acquisition unit, include a plurality of inverters, a plurality of three to two adders and a plurality of buffer, wherein this three to two adder sees that than binary storage adder and carry adder constitutes by three in advance.
6. according to the described image display enhanced system of claim 1, it is characterized in that this brightness adjustment unit needs two execution cycles.
7. according to the described image display enhanced system of claim 1, it is characterized in that this threshold selected cell includes a plurality of thresholds, three to two adders and a buffer, wherein this three to two adder sees that than binary storage adder and carry adder constitutes by three in advance.
8. according to the described image display enhanced system of claim 1, it is characterized in that the value of this threshold selected cell needs to add the difference that replaces subtracter with inverter.
9. image display enhanced system includes:
Index is selected by one stratum, and the image stratum in order to select to handle makes this image display enhanced system can directly handle arbitrary stratum image, simplifies computation complexity and operation time;
One high pass filter is linked to this stratum and selects index, in order to acquisition input image radio-frequency component;
One low pass filter is linked to this stratum and selects index, in order to acquisition input image low-frequency component;
One threshold is linked to this high pass filter, in order to handle this high frequency image ingredient noise;
One gain is linked to this threshold, in order to strengthen the image detail of this high frequency image composition;
One brightness adjustment unit is linked to this low pass filter, in order to adjust this low frequency image composition brightness;
One adder is linked to this gain and this brightness adjustment unit, in order to the low-frequency component of the radio-frequency component that adds up this image and this image, and obtains an image; And
One regular unit is linked to this adder, in order to this image normalization that this adder is obtained, restoring its size, and obtains the image that desire is handled.
10. image display enhanced method, its step includes:
Handle three signal of video signal of input continuously with displacement mode, and obtain 9 image datas;
With aforementioned 9 image datas obtaining,,, and obtain one first ensemble with 3 image data additions according to the form of high pass and low pass filter;
This first ensemble image data according to the high pass filter coefficient, is obtained the image data radio-frequency component;
This first ensemble image data according to low-pass filter coefficients, is obtained the image data low-frequency component;
The image data radio-frequency component done that noise removing is handled and image detail increases to show and handles;
The image data low-frequency component is done the brightness adjustment; And
Image data radio-frequency component and the addition of image data low-frequency component with handling increase the signal of video signal that showed and obtain one.
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| CNB2005100877527A CN100399797C (en) | 2005-08-08 | 2005-08-08 | Image display enhanced system |
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| KR101563729B1 (en) * | 2008-10-10 | 2015-10-27 | 삼성전자주식회사 | Apparatus and method for processing image to generate high resolution image |
| JP6035718B2 (en) * | 2011-09-07 | 2016-11-30 | カシオ計算機株式会社 | Projection apparatus, projection method, and program |
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| CN1077833A (en) * | 1992-04-13 | 1993-10-27 | 西安电子科技大学 | Background noise with drag point interference suppressing circuit |
| US5436729A (en) * | 1991-11-27 | 1995-07-25 | Hitachi, Ltd. | Video signal processing apparatus with automatic picture quality control function and signal processing circuit |
| CN1347246A (en) * | 2000-09-30 | 2002-05-01 | Lg电子株式会社 | Video signal contrast intensifying device |
| CN1365567A (en) * | 2000-03-24 | 2002-08-21 | 皇家菲利浦电子有限公司 | Electronic circuit and method for enhancing an image |
| JP2003339058A (en) * | 1993-04-19 | 2003-11-28 | Mitsubishi Electric Corp | Image quality correction circuit |
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2005
- 2005-08-08 CN CNB2005100877527A patent/CN100399797C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5436729A (en) * | 1991-11-27 | 1995-07-25 | Hitachi, Ltd. | Video signal processing apparatus with automatic picture quality control function and signal processing circuit |
| CN1077833A (en) * | 1992-04-13 | 1993-10-27 | 西安电子科技大学 | Background noise with drag point interference suppressing circuit |
| JP2003339058A (en) * | 1993-04-19 | 2003-11-28 | Mitsubishi Electric Corp | Image quality correction circuit |
| CN1365567A (en) * | 2000-03-24 | 2002-08-21 | 皇家菲利浦电子有限公司 | Electronic circuit and method for enhancing an image |
| CN1347246A (en) * | 2000-09-30 | 2002-05-01 | Lg电子株式会社 | Video signal contrast intensifying device |
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