CN102760294A - High-accuracy image height substituted linkage display method - Google Patents
High-accuracy image height substituted linkage display method Download PDFInfo
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- CN102760294A CN102760294A CN2012102701670A CN201210270167A CN102760294A CN 102760294 A CN102760294 A CN 102760294A CN 2012102701670 A CN2012102701670 A CN 2012102701670A CN 201210270167 A CN201210270167 A CN 201210270167A CN 102760294 A CN102760294 A CN 102760294A
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Abstract
The invention provides a high-accuracy image height substituted linkage display method, which comprises the following steps of: 1, substituting a gray value of a pixel on a selected image cut line in a main display window by utilizing height in an auxiliary display window; 2, adjusting the window position and the window width in the main display window through an image of a selected region in the auxiliary display window; and 3, adjusting amplification of pixel gray level difference of an image in the selected region in the main display window and amplification of an image region area by utilizing a local image of the auxiliary display window, thereby realizing quick search of an ROI (Region of Interest) when the image gray is close.
Description
Technical field
The present invention relates to Flame Image Process and display technique, more specifically, relate to a kind of high precision image height and substitute interlocked display method.
Background technology
Along with the development of Dynamic Non-Destruction Measurement, the image precision that Non-Destructive Testing forms is also increasingly high.The demonstration of image generally is divided into two kinds of hard demonstration and soft demonstrations, and hard the demonstration is that image on media such as printer paper, film appears, and soft demonstration is the demonstration that on display, realizes image through software.
Show firmly that for image through chemical reaction specific chemical is deposited on the film by image greyscale, these materials reflex to the light of difference amount in the human eye under the irradiation of light source, thereby form image.When needs show the high precision image on low gray level display medium, use earlier the image appearance form under the selected special parameter of windowing technology of the soft demonstration of image, and then mode such as print, develop and print image is solidificated on the corresponding medium.
For the soft demonstration of image, screen pixels is mapped in the human eye through the light that sends with the image equal proportion, forms image.When on low gray level video display, showing high-precision image at present, the general display technique of windowing that adopts realizes.The data area (VOI, Value of Interest-interest value) that the display technique of windowing is handled according to raw video data decimation needs, and the acquisition of VOI is generally realized according to custom adjusting window width, window position by the observer.In specific VOI scope, searching region-of-interest (ROI, Region of Interest) is observer's final purpose.There is different definition in so-called ROI zone in different fields, and at exploration, device detection range, the ROI zone is generally corresponding to tomography, crackle etc., in the regional general corresponding lesion tissue of medical domain ROI.
In the practical operation, no matter be hard the demonstration or soft demonstration, when number of greyscale levels that the number of greyscale levels of image can appear greater than display medium, image can't normally show.When using windowing technology, the details in the image is when other image greyscales are close on every side, and details be easy to be windowed " masking property " of display technique is shown as and the identical gray scale of other images on every side.Even image detail has certain discrimination with other image greyscales on every side, but, also can the person of being observed ignore when this discrimination during less than the gray scale differentiation threshold value of human eye.Therefore, image detail is not easy to come to light when detecting.For example, show the field at medical image, the patient of a lot of their early stages can not correctly be confirmed focus, does not more know where to begin by treatment correctly.
Even image detail is distinguished threshold value with the display gray scale of other images on every side greater than the gray scale of human eye, and image greyscale progression is greater than the 20-30 level in the zone, vision system also can't be distinguished this regional image detail.
Summary of the invention
For overcoming the above-mentioned defective of prior art, the present invention proposes a kind of high precision image height and substitutes interlocked display method.
According to an aspect of the present invention, proposed a kind of high precision image height and substituted interlocked display method, having comprised: step 1, in auxiliary display window, utilize the gray-scale value that highly replaces pixel on the image transversal selected in the main display window; Step 2 is adjusted window position, window width in the main display window through the image in zone selected in the auxiliary display window, checks; Step 3 utilizes the local image of auxiliary display window to adjust in the main display window amplification of the amplification of image pixel gray-level difference and imagery zone area in the selection area, regional the searching fast of ROI when realizing that image greyscale is close.
Window position window width when the present invention confirms that through the image of observing auxiliary display window main display window shows can make and search the observer and search the regional time of ROI and shorten greatly.Image through observing auxiliary display window is confirmed the gray-level difference of show image in the main display window and the enlargement factor of ROI region area; The amplification of gray-level difference can make the ROI zone more outstanding on display brightness; The amplification of ROI region area; " vision system masking property " lost efficacy, thereby reach visual effect preferably.
Description of drawings
Fig. 1 illustrates the monochromatic image surface chart of simulation;
Fig. 2 illustrates the corresponding sectional view of PQ transversal;
Fig. 3 illustrates the stereo display figure of two dimensional gray figure;
Fig. 4 illustrates the design sketch that highly substitutes interlocked display method.
As shown in the figure; In order clearly to realize the structure of embodiments of the invention, marked specific structure and device in the drawings, but this is merely the signal needs; Be not that intention is limited to the present invention in this ad hoc structure, device and the environment; According to concrete needs, those of ordinary skill in the art can adjust these devices and environment or revise, and adjustment of being carried out or modification still are included in the scope of accompanying Claim.Here do simultaneously is that the accompanying drawing part only is in order to describe embodiment more specifically, and is not intended to the present invention is carried out concrete qualification with explanation.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the alternative interlocked display method of a kind of high precision image height provided by the invention is described in detail.
In the following description, with description a plurality of different aspects of the present invention, yet, for the one of ordinary skilled in the art, can only utilize perhaps entire infrastructure more of the present invention or flow process to come embodiment of the present invention.For the definition of explaining, specific number, configuration and order have been set forth, but clearly, in that do not have also can embodiment of the present invention under the situation of these specific detail.In other cases, in order not obscure the present invention, will set forth no longer in detail for some well-known characteristics.
In continuous domain, the analog gray scale image can be expressed as f, and (x, y), (x, y) brightness value of expression image is as shown in Figure 1 for f.For example the P point coordinate is (x
0, y
0), f (x then
0, y
0) be the brightness value of this point.If in image, get a transversal, like the transversal PQ among Fig. 1, the sectional view that then this transversal is corresponding is as shown in Figure 2.
Wherein, the curvilinear equation of PQ on the xy plane is among Fig. 1:
y＝kx+b 0≤x≤X 0≤y≤Y；
k＝(Y-y
1)/(x
2-X)；
b＝(y
1x
2-YX)/(x
2-X)；
Among Fig. 1 among transversal PQ and Fig. 2 the variable relation of corresponding sectional view be: u
0=[(x
0-X)
2+ (y
0-y
1)
2]
0.5, u
1=[(x
2-X)
2+ (Y-y
1)
2]
0.5, g (u
0)=f (x
0, y
0).
Usually on display medium, (x
0, y
0) the brightness value f (x at some place
0, y
0) being quantified as corresponding gray-scale value, this gray-scale value then shows with the light with the gray-scale value corresponding brightness.
Under the general situation, no light source medium such as film comes the remarked pixel gray scale through the light in the reflection environment, and display etc. contain light source device and come the remarked pixel gray scale through launching light.The light of being had a few on the display medium enters into human eye, has just formed image.And human eye is less to the susceptibility of image greyscale, but responsive to the corresponding height of gray scale equal proportion.With the medical image is example, and the little tissue image's pixel grey scale of gray area calibration in the image is very easy to distinguish in its gray scale stereographic map, and is as shown in Figure 3.
Generally speaking, a kind of high precision image height of the present invention substitutes interlocked display method and comprises: step 1, in auxiliary display window, utilize the gray-scale value that highly replaces pixel on the image transversal selected in the main display window; Step 2 is adjusted window position, window width in the main display window through the image in zone selected in the auxiliary display window, checks; Step 3 utilizes the local image of auxiliary display window to adjust in the main display window amplification of the amplification of image pixel gray-level difference and imagery zone area in the selection area, regional the searching fast of ROI when realizing that image greyscale is close.
Particularly, in step 1, on display medium, increase an auxiliary display window, the corresponding cross-sectional view as shown in Figure 2 of a certain transversal of image in this window displayed map 1.Promptly; On display medium, directly use the height with image pixel gray-scale value geometric ratio to replace former image pixel gray scale; So just, can solve the shortcoming of traditional medicine image display technique, make the observer distinguish the details of image easily, this also is a key point of the present invention.
Further, in step 1, the one, behind transversal of selected at random 2 formation, display window 2 shows corresponding sectional view in display window 1.If move this transversal at random, then the sectional view in the display window 2 can link with the variation of transversal position.
Particularly, in step 2, in display window 2 behind selected certain zone, confirm this zone boundary after, in the zone, select a bit, as shown in Figure 4.Confirm window width W by selected zone then, confirm window position C, in display window 1, use the display technique of windowing to show this image by selected point.
Through the setting and the operation of step 1, during the image of observer in checking display window 1, can select form a transversal at random at 2, just can in display window 2, form sectional view.When Fig. 4 is parallel to the x axle of image coordinate for transversal and is fixed in the image middle part, the situation when two display windows are arranged side by side.
Further, be example with the high precision medical image, Fig. 4 left side is main display window 1, demonstration be the experiment contrast image of head MR; Right be auxiliary display window 2, demonstration be the corresponding height image of grey scale pixel value on the transversal in the display window 1.The transversal of the experiment contrast image of the MR in Fig. 4 display window 1 is the straight line that is parallel to transverse axis, is initial point with display window 1 upper left corner, and then its coordinate at the y axle is 255.The cross sectional images that grey scale pixel value is corresponding on this transversal is shown in display window 2.
Particularly; In step 2; If the observer wants carefully to check a certain specific region of image, like the image in 120-140 zone on the transverse axis among Fig. 4, the gray scale maximal value that then can make this area part is window position C; The difference of maximum gradation value and minimum gradation value is window width W, so just can in display window 1, check the image that this is regional easily.If will make this zone more outstanding, can be based in the display window 2 and obtain area coordinate, image in display window 1 that other are regional shields.
Particularly, in step 3, less when the area of selection area in display window 2, the more and pixel grey scale of number of greyscale levels is differential when less, and dynamically during the image in the enlarged and displayed window 1, " vision masking property " that the human visual system is caused lost efficacy.This make searching of ROI zone convenient more with accurately, can make the time decreased of searching of tomography, crackle etc. in Exploration Domain, at medical domain the early diagnostic rate of disease is improved greatly.
Particularly; In the step 3; Through observing in the display window 2 the height substitution value of image pixel gray scale in a certain zone, if find that this area part image greyscale is undesired, then can (like certain two pixel grey scale difference be 2 through this zone display gray scale of expansion differential; Can show through windowing and be enlarged into 4) with the amplification of region area (being about to image directly amplifies), realize regional the checking of VOI.The differential amplification of display gray scale can make the gray area calibration of corresponding region in the display window 1 become big, makes image detail more be prone to identification.The amplification of region area can overcome in than the zonule human eye can distinguish the defective that gray scale has only the 20-30 level, makes the pixel that originally was not easily distinguishable and is prone to mix pixel relative distance and amplifies, and in display window 1, realizes distinguishing.
Gray scale or the brightness value of display window 2 highly to replace image pixel among the present invention, this height is only relevant with the vertical number of pixels of display.Even the number of the vertical pixel of display is less than the gray level of input image; Also can be through the amplification and the translation of local image in the display window 2; Come the alternative height value of grey scale pixel value on the complete demonstration transversal, so just can distinguish the each several part details composition in the image on the transversal.
Because of human eye to the separating capacity of image height much larger than separating capacity to image greyscale or brightness, use the present invention after, in display window 2, can distinguish the close image of gray scale well.Respective regions amplifies in display window 2, and its discrimination in display window 2 will be bigger, and this can evade " the technological masking property " of the display technique of windowing well.
When observer's visual attention location region area less; And when this area image number of greyscale levels is big; Because much larger than the separating capacity to image greyscale or brightness, " the vision masking property " that caused by human visual system's defective will not exist human eye to the separating capacity of image height.
What should explain at last is; Above embodiment is only in order to describe technical scheme of the present invention rather than the present technique method is limited; The present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (9)
1. a high precision image height substitutes interlocked display method, comprising:
Step 1 is utilized the gray-scale value that highly replaces pixel on the image transversal selected in the main display window in auxiliary display window;
Step 2 is adjusted window position, window width in the main display window through the image in zone selected in the auxiliary display window, checks;
Step 3 utilizes the local image of auxiliary display window to adjust in the main display window amplification of the amplification of image pixel gray-level difference and imagery zone area in the selection area, regional the searching fast of ROI when realizing that image greyscale is close.
2. based on the described method of claim 1, wherein, in step 1, on display medium, increase auxiliary display window, this auxiliary display window be used for show on the display medium with selected image transversal on grey scale pixel value possess the pixels tall figure of geometric ratio relation.
3. method according to claim 1, wherein, in step 1; Through transversal of selected at random 2 formation in main display window; Show corresponding sectional view at auxiliary display window, through moving this transversal at random, the sectional view in auxiliary display window can link with the variation of transversal position.
4. method according to claim 1, wherein, in step 2; Selection area and definite zone boundary are selected a bit in the zone in auxiliary display window, confirm window width by selected zone; Point by selected is confirmed the window position, in main display window, uses the display technique of windowing to show this image.
5. method according to claim 1 wherein, in step 2, is the window position through regions gray scale maximal value partly, and the difference of maximum gradation value and minimum gradation value is a window width, in main display window, checks the image of region-of-interest.
6. method according to claim 5, wherein, in step 2, according in auxiliary display window, obtaining area coordinate, image in main display window that other are regional shields.
7. method according to claim 1, wherein, in step 3, the area of selection area is less in auxiliary display window, and the more and pixel grey scale of number of greyscale levels is differential when less, when dynamically amplifying the image in the main display window, to search the ROI zone.
8. method according to claim 1, wherein, in the step 3, through enlarging in the auxiliary display window the differential and region area of image display gray scale in a certain zone, to check the VOI zone.
9. method according to claim 6 wherein, through the amplification and the translation of local image in the auxiliary display window, is come the alternative height value of grey scale pixel value on the complete demonstration transversal, to distinguish the each several part details composition in the image on the transversal.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108737744A (en) * | 2018-06-14 | 2018-11-02 | 中国铁塔股份有限公司 | A kind of display methods and device of image |
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| CN101105862A (en) * | 2007-08-02 | 2008-01-16 | 宁波大学 | Medical image window parameter self-adaptive regulation method |
| EP2109080A1 (en) * | 2008-04-09 | 2009-10-14 | IBBT vzw | A method and device for processing and presenting medical images |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108737744A (en) * | 2018-06-14 | 2018-11-02 | 中国铁塔股份有限公司 | A kind of display methods and device of image |
| CN108737744B (en) * | 2018-06-14 | 2020-10-30 | 中国铁塔股份有限公司 | Image display method and device |
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Application publication date: 20121031 |