CN101521737A - Video detecting device and related detecting method thereof - Google Patents
Video detecting device and related detecting method thereof Download PDFInfo
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- CN101521737A CN101521737A CN200810081295A CN200810081295A CN101521737A CN 101521737 A CN101521737 A CN 101521737A CN 200810081295 A CN200810081295 A CN 200810081295A CN 200810081295 A CN200810081295 A CN 200810081295A CN 101521737 A CN101521737 A CN 101521737A
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Abstract
The invention discloses a video detecting device, which comprises the following components: a first pixel detector, a second pixel detector and a judging unit, wherein the first pixel detector is used for processing target pixels of a target scanning line in a first scene, and generating a first detected value corresponding to the target pixels by comparing the signal value difference among a plurality of first compared pixels of a first scanning line and a second scanning line in a second scene that correspond to the target scanning line; the second pixel detector is used for processing reference pixels of the first scanning line in the second scene, and generating a second detected value corresponding to the reference pixels by comparing the signal value difference among a plurality of second compared pixels of the target scanning line and a third scanning line in the first scene that corresponds to the first scanning line; and the judging unit is used for generating judged values according to the first and second detected values.
Description
Technical field
The invention provides a kind of video detecting device and correlation technique, the device and the related detecting method that provide a kind of Video Detection to have or not image crenellated phenomena and field displacement particularly.
Background technology
Traditional interlacing scan (Interlaced Scan) technology successively shows odd-numbered scan lines in this picture frame and even-line interlace line when showing a picture frame (Frame).So each frame is actually by two fields (Field) are staggered and forms, strange (an Odd Field) who forms by odd-numbered scan lines, the idol (Even Field) that another then is made up of the even-line interlace line.
New (Progressive Scan) technology of lining by line scan, be called non-interlace (Non-interlaced) again, then be earlier a frame to be merged in two fields, scan this frame successively with the horizontal frequency that doubles again, so the stability and the meticulous sense of picture all can significantly promote.
Because the image between different may have the time difference, therefore, whether before a frame was merged in two fields, a very important problem was to detect between two fields that are used for merging whether picture displacement takes place, just have field displacement (Field Motion) to produce.If between two fields field displacement is arranged, then a frame is merged in these two fields after, can cause the phenomenon of this frame generation image sawtooth (Sawtooth), thereby reduce the quality of picture.
Yet, in the video detecting device of prior art (for example Taiwan patent I227085), the detection method of image sawtooth situation can't accurately be recognized the variation of high-frequency region sound attitude usually in the detection method of field displacement and the picture, thus the accuracy of influence picture output under high frequency environment.
Summary of the invention
Therefore main purpose of the present invention is to provide a kind of video detecting device and related detecting method, judges by multi-faceted detection method whether the frame that this place is formed has the image crenellated phenomena, and whether field displacement is arranged, to address the above problem.
The present invention discloses a kind of video detecting device, this video detecting device comprises: first pixel detectors, be used for handling the object pixel of first middle target scanning lines, by comparing in second and the signal value difference between a plurality of first comparison pixels in corresponding first scan line of this target scanning lines and second scan line, to produce first detected value corresponding to this object pixel, this target scanning lines is between this first scan line and this second scan line; Second pixel detectors, be used for handling the reference pixel of this first scan line in this second, by comparing in this first and the signal value difference between a plurality of second comparison pixels in the corresponding three scan line of this first scan line and this target scanning lines, to produce second detected value corresponding to this reference pixel, this first scan line is between this target scanning lines and this three scan line; And judging unit, be coupled to this first image sawtooth detector and this second image sawtooth detector, be used for producing judgment value according to this first, second detected value.
The present invention also discloses a kind of video detecting method, this detection method comprises: the object pixel that compares first middle target scanning lines, and in second and the signal value difference between a plurality of first comparison pixels in corresponding first scan line of this target scanning lines and second scan line, to produce first detected value corresponding to this object pixel, this target scanning lines is between this first scan line and this second scan line; The reference pixel of this first scan line in this second relatively, and in this first and the signal value difference between a plurality of second comparison pixels in the corresponding three scan line of this first scan line and this target scanning lines, to produce second detected value corresponding to this reference pixel, this first scan line is between this target scanning lines and this three scan line; And according to this first, second detected value generation judgment value.
Video detecting device of the present invention not only carries out the crenellated phenomena detecting operation to object pixel, and the pixel of choosing the adjacent domain at object pixel place in addition detects as the reference pixel, and therefore video detecting device of the present invention has promoted susceptibility and the accuracy that detects object pixel significantly.Can recognize simultaneously the variation of high-frequency region sound attitude more accurately, thereby improve the fineness of whole picture output under high frequency environment.
Description of drawings
Fig. 1 is the schematic diagram of frame picture.
Fig. 2 is the schematic diagram of the embodiment of video detecting device of the present invention.
Fig. 3 is the flow chart that video detecting device shown in Figure 2 carries out Video Detection.
The primary clustering symbol description
200 video detecting devices
210,220 low pass filters
230 object pixel detectors
232,242 computing units
234,244 comparing units
240 reference pixel detectors
246 selected cells
250 judging units
Embodiment
Embodiments of the invention of being mentioned in the following description in fact can the application simulation processing, digital processing or in conjunction with the technology of numeral with simulation process, but also application software technology carries out the processing of digital signal.
With reference to Fig. 1.Fig. 1 is the schematic diagram of frame picture 100.Picture 100 is by first F
nWith second F
N-1Interlock and form this first F
nIn horizontal scanning line comprise scan line 10,30,50 or the like, and at this first F
nSecond F of before this
N-1In horizontal scanning line then comprise scan line 20,40 or the like.Pixel 102,104 ..., 148 and 150 are partial pixels in the picture 100.
With reference to Fig. 2.Fig. 2 is the schematic diagram of the embodiment of video detecting device 200 of the present invention.Video detecting device 200 comprises a plurality of low pass filters 210,220, object pixel detector 230, reference pixel detector 240, and judging unit 250.Object pixel detector 230 comprises computing unit 232 and comparing unit 234, and reference pixel detector 240 then comprises computing unit 242, comparing unit 244 and selected cell 246.In the present embodiment, low pass filter 210,220 is used for respectively the video data that inputs to object pixel detector 230 and reference pixel detector 240 is carried out low-pass filtering with filtering noise.Had certain resolution if input to the video data of video detecting device 200, video detecting device 200 of the present invention also can comprise low pass filter 210,220 and receive this video data, and this all belongs to scope of the present invention.The video data that video detecting device 200 is received can be a black and white video, also can be the color difference signal (Component Video) of analog or digital form, as RGB, Y/I/Q, Y/U/V, Y/R-Y/B-Y, Y/Cr/Cb or the like.Video data inputs to respectively in object pixel detector 230 and the reference pixel detector 240 behind process low pass filter 210,220 filtering noises.Computing unit 232 in the object pixel detector 230 is used for calculating the signal value (for example brightness value or chromatic value etc.) of the object pixel that is arranged in target scanning lines, with the difference of the signal value of a plurality of comparison pixels in the neighbor scanning line.For instance, the object pixel 126 of supposing 200 pairs of target scanning lines shown in Figure 1 30 of video detecting device carries out the operation of pixel detection, as mentioned above, computing unit 232 calculates the difference value d1 of the signal value of the comparison pixels 116 on object pixel 126 and the target scanning lines 30, and the difference value d2 that calculates the signal value of the comparison pixels 136 under object pixel 126 and the target scanning lines 30, and these two difference value d1, d2 are sent in the comparing unit 234.Next, two difference value that 234 pairs of comparing units receive are judged, and generation is corresponding to the detected value S1 of object pixel 126, for instance, if two difference value d1 that comparing unit 234 is received, d2 is not 0 and sign when opposite, comparing unit 234 exportable logical one signals (representing that just object pixel 126 and comparison pixels 116,136 have crenellated phenomena) then, and next output logic 0 signal of other situation.
Please note, in an embodiment of the present invention, object pixel detector 230 can utilize the checkout gear of prior art to be applied according to different design requirements, for instance, in practice, object pixel detector 230 can utilize among the patent I227085 of Taiwan disclosed video check device to implement.As mentioned above, object pixel detector 230 comparison object pixels 126 in the video detecting device 200 and its pixel 116 and 136 of relative position up and down detect, yet, because its scope relatively is too little, therefore whether have crenellated phenomena if can't very accurately judge this object pixel under specific circumstances, for example in the present embodiment, because comparing unit 234 comparison object pixels 126 and comparison pixels 116,136 do not have so-called crenellated phenomena and take place, yet (for example pixel 106 at the neighborhood pixels of this object pixel 126 generation of crenellated phenomena but, 116, and 126).Therefore, in order to increase the sensitivity that video detecting device 200 is judged for crenellated phenomena, the present invention also sets up reference pixel detector 240 in addition in video detecting device 200, be used for auxiliary mark pixel detectors 230 to reach the purpose of more accurate judgement crenellated phenomena.
Therefore, after receiving the video data that is filtered via low pass filter 220 when reference pixel detector 240, selected cell 246 in the reference pixel detector 240 is selected reference pixel according to the adjacent domain of object pixel 126, in the present embodiment, selected cell 246 can be chosen in pixel 116 on the object pixel 126 as with reference to pixel, next, computing unit 242 calculates the difference value d1 ' of the signal value of the comparison pixels 106 on reference pixel 116 and the reference scan line 20, and the difference value d2 ' that calculates the signal value of the former object pixel 126 under reference pixel 116 and the reference scan line 20, and with these two difference value d1 ', d2 ' is sent in the comparing unit 244.Next, two difference value that 244 pairs of comparing units receive are judged, and generation is corresponding to the detected value S2 of reference pixel 116, for instance, if comparing unit 244 two received difference value d1 ', d2 ' are not 0 and sign when opposite, comparing unit 244 exportable logical one signals (representing that just reference pixel 116 and pixel 106,126 have crenellated phenomena) then, and next output logic 0 signal of other situation.
As mentioned above, reference pixel detector 240 topmost functions among the present invention are to select reference pixel 116 in the adjacent domain of object pixel 126, and carry out the operation that another time crenellated phenomena is analyzed again according to this reference pixel 116, at last, the judging unit 250 in the video detecting device 200 judges further according to the detected value S1, the S2 that are sent out by comparing unit 234,244 whether object pixel 126 has crenellated phenomena to take place again.In practice, judging unit 250 can carry out logical operation according to the logical value of detected value S1, S2, in the present embodiment, because object pixel detector 230 detected next object pixels 126 there is no the generation (just detected value S1 is 0) of crenellated phenomena, yet reference pixel detector 240 detected next reference pixels 116 have the generation (just detected value S2 is 1) of crenellated phenomena.Therefore, judging unit 250 can carry out the OR logical operation and determine that the judgment value E of its last output is 1 detected value, represents that just object pixel 126 takes place for crenellated phenomena is arranged in the result who is detected via video detecting device 200 of the present invention.But this is not used for limiting the logical operation mode of judging unit 250, because can carry out logical operations such as AND, NOR, XOR at the different demands on using yet.
As mentioned above, not only detect in the video detecting device 200 of the present invention at object pixel 126, also choose reference pixel 116 and carry out extra auxiliary judgement at the adjacent domain of object pixel 126, in the above-described embodiments, because object pixel detector 230 detected next object pixels 126 there is no the generation of crenellated phenomena, yet, utilize reference pixel detector 240 to come that extraly the adjacent domain at object pixel 126 places is chosen reference pixel and detect the adjacent domain of promptly finding object pixel 126 once more and have crenellated phenomena to take place.Therefore, video detecting device 200 of the present invention has promoted the susceptibility that detects object pixel 126 significantly.By last example as can be known, video detecting device 200 is with object pixel 126 and two pixels (pixel 106 above it, 116) and following pixel (pixel 136) for according to coming object pixel 126 is detected, yet, the present invention does not limit the pixel selection mode of video detecting device 200, that is to say, selected cell 246 in the reference pixel detector 240 also can be chosen different reference image simultaneously and usually detect, for instance, but selected cell 246 also selected pixels 136 is a reference pixel, and reference pixel detector 240 also can be according to pixel 126, and 146 come reference pixel 136 is detected, and so video detecting device 200 can be simultaneously with object pixel 126 and pixel (pixel 116) above it and following two pixels (pixel 136,146) be according to the detecting operation that comes object pixel 126 is carried out crenellated phenomena.In addition, video detecting device 200 of the present invention can also detect as basis with the oblique pixel of object pixel 126, for example but selected pixels 110,118,126,134 is for detecting basis, object pixel detector 230 can carry out computing according to pixel 118,126,134 at this moment, and reference pixel detector 240 then can utilize pixel 118,126,134 to carry out computing.In addition, because different pixels is chosen mode and can be produced different detected values, judging unit 250 of the present invention comes these detected values are carried out logical operation after also can repeatedly collecting different detected values again, and so just whether evaluating objects pixel 126 has crenellated phenomena to take place more accurately.At last, whether the judging unit 250 in the video detecting device 200 can have field displacement to take place according to the picture 100 that how much decides of pixel generation crenellated phenomena in the picture 100.
With reference to Fig. 3, Fig. 3 is the flow chart that video detecting device 200 shown in Figure 2 carries out Video Detection.Note that the correlation step in the flow chart not necessarily carries out continuously according to this ordering, and other step may be inserted wherein also.The step that video detecting device 200 carries out Video Detection can be summarized as follows:
Step 300: beginning
Step 302: compare first F
nThe object pixel 126 of middle target scanning lines 30, and second F
N-1In and the signal value difference of 136 of the pixel 116 of these target scanning lines 30 corresponding first scan lines 20 and the pixels in second scan line 40.
Step 304: produce the first detected value S1 corresponding to this object pixel.
Step 306: this second F relatively
N-1In the reference pixel 116 of this first scan line 20, and this first F
nIn and the signal value difference of 126 of the pixel 106 of these first scan line, 20 corresponding three scan lines 10 and the pixels in this target scanning lines 30.
Step 308: produce the second detected value S2 corresponding to this reference pixel 116.
Step 310: produce judgment value E according to this first detected value S1, the second detected value S2.
Step 312: finish
With respect to prior art, video detecting device of the present invention not only carries out the crenellated phenomena detecting operation to object pixel, and the pixel of additionally choosing the adjacent domain at object pixel place detects as the reference pixel, and therefore video detecting device of the present invention has promoted susceptibility and the accuracy that detects object pixel significantly.More can accurately recognize simultaneously the variation of high-frequency region sound attitude, thereby improve the fineness of whole picture output under high frequency environment.
The above is the preferred embodiments of the present invention, and every equivalence that claim is made according to the present invention changes and revises, and all should belong to coverage of the present invention.
Claims (10)
1. video detecting device, it comprises:
First pixel detectors, be used for handling the object pixel of first middle target scanning lines, by comparing in second and the signal value difference between a plurality of first comparison pixels in corresponding first scan line of this target scanning lines and second scan line, to produce first detected value corresponding to this object pixel, this target scanning lines is between this first scan line and this second scan line;
Second pixel detectors, be used for handling the reference pixel of this first scan line in this second, by comparing in this first and the signal value difference between a plurality of second comparison pixels in the corresponding three scan line of this first scan line and this target scanning lines, to produce second detected value corresponding to this reference pixel, this first scan line is between this target scanning lines and this three scan line; And
Judging unit is coupled to this first image sawtooth detector and this second image sawtooth detector, is used for producing judgment value according to this first, second detected value.
2. video detecting device as claimed in claim 1, wherein this judgment value is used to refer to whether correspondence image sawtooth of this object pixel.
3. video detecting device as claimed in claim 1, wherein this judgment value is used to refer to the whether corresponding fields displacement of this object pixel, and determining according to what of image sawtooth.
4. video detecting device as claimed in claim 1, wherein this second scan line is positioned at the top of this target scanning lines and this first scan line is positioned at the below of this target scanning lines, or wherein this first scan line is positioned at the top of this target scanning lines and this second scan line is positioned at the below of this target scanning lines.
5. video detecting device as claimed in claim 1, wherein this object pixel, this reference pixel, these a plurality of first comparison pixels and these a plurality of second comparison pixels are arranged on the vertical direction of the corresponding frame in this first, second place or on the oblique line directions.
6. video detecting method, it comprises the following steps:
The object pixel that compares first middle target scanning lines, and in second and the signal value difference between a plurality of first comparison pixels in corresponding first scan line of this target scanning lines and second scan line, to produce first detected value corresponding to this object pixel, this target scanning lines is between this first scan line and this second scan line;
The reference pixel of this first scan line in this second relatively, and in this first and the signal value difference between a plurality of second comparison pixels in the corresponding three scan line of this first scan line and this target scanning lines, to produce second detected value corresponding to this reference pixel, this first scan line is between this target scanning lines and this three scan line; And
Produce judgment value according to this first, second detected value.
7. video detecting method as claimed in claim 6, wherein this judgment value is used to refer to whether correspondence image sawtooth of this object pixel.
8. video detecting method as claimed in claim 6, wherein this judgment value is used to refer to the whether corresponding fields displacement of this object pixel, and determining according to what of image sawtooth.
9. video detecting method as claimed in claim 6, wherein this second scan line is positioned at the top of this target scanning lines, and this first scan line is positioned at the below of this target scanning lines, or this first scan line is positioned at the top of this target scanning lines, and this second scan line is positioned at the below of this target scanning lines.
10. video detecting method as claimed in claim 6, wherein this object pixel, this reference pixel, these a plurality of first comparison pixels and these a plurality of second comparison pixels are arranged on the vertical direction of the corresponding frame in this first, second place or on the oblique line directions.
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| CN200810081295A CN101521737A (en) | 2008-02-26 | 2008-02-26 | Video detecting device and related detecting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353355A (en) * | 2011-06-14 | 2012-02-15 | 西安工程大学 | Method for measuring power transmission line pole and tower inclination based on video differences |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353355A (en) * | 2011-06-14 | 2012-02-15 | 西安工程大学 | Method for measuring power transmission line pole and tower inclination based on video differences |
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Open date: 20090902 |