CN110264938B - Image display method and device - Google Patents
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Abstract
The application provides an image display method and device, and the method comprises the following steps: obtaining the brightness display range of an image to be displayed according to the panel brightness of the display and the first output brightness of the display; the first output brightness is the display brightness of the previous frame image on the display; acquiring input brightness and output brightness in a brightness display range, and establishing a brightness mapping relation between the input brightness and the output brightness; acquiring target input brightness; the target input brightness is the original brightness of the image to be displayed; acquiring second output brightness according to the target input brightness and the brightness mapping relation; the second output brightness is the display brightness of the image to be displayed. And establishing a brightness mapping relation between the input brightness and the output brightness by combining the panel brightness of the display and the display brightness of the previous frame of image. The display brightness of the image to be displayed is obtained through the mapping relation, and a good display effect can be obtained when the display displays the image to be displayed according to the display brightness.
Description
Technical Field
The present application relates to the field of image display, and in particular, to an image display method and apparatus.
Background
HDR (High Dynamic Range) technology is a technology for processing images displayed on a display. The brightness of the image captured by the camera is typically of the order of 2 16 Even higher, whereas the display is typically only capable of displaying 2 8 Of the order of magnitude of brightness. Due to the limited range of display, the display loses too much image detail when displaying images. The HDR technology can provide more image details to solve the problem that the image details are lost too much when the display is used for displaying.
In the prior art, when an HDR technology is used on a set-top box to process an image and then the processed image is sent to a display to be displayed, a television may adjust brightness of the processed image, so that a display effect of the image on the television is poor.
Disclosure of Invention
The application aims to provide an image display method and device to solve the problem that the display effect of an image to be displayed is influenced by dimming the brightness of the adjusted image to be displayed by a display.
In order to achieve the above object, the embodiments of the present application adopt the following technical solutions:
in a first aspect, an embodiment of the present application provides an image display method, including: and obtaining the brightness display range of the image to be displayed according to the panel brightness of the display and the first output brightness of the display. The first output brightness is the display brightness of the last frame of image on the display.
And acquiring input brightness and output brightness in the brightness display range, and establishing a brightness mapping relation between the input brightness and the output brightness. And acquiring target input brightness, wherein the target input brightness is the original brightness of the image to be displayed. And acquiring second output brightness according to the target input brightness and the brightness mapping relation. The second output brightness is the display brightness of the image to be displayed.
Optionally, the obtaining input brightness and output brightness, and establishing a brightness mapping relationship between the input brightness and the output brightness includes: and acquiring compensation brightness according to the panel brightness and the first output brightness. And obtaining the output brightness according to the input brightness and the compensation brightness. And establishing a brightness mapping relation between the input brightness and the output brightness according to the input brightness and the output brightness.
Optionally, after obtaining the second output luminance according to the target input luminance and the luminance mapping relationship, the method further includes: and acquiring compensation brightness according to the panel brightness and the first output brightness. And obtaining the display brightness after brightness compensation according to the second output brightness and the compensation brightness.
Optionally, before obtaining the luminance display range of the image to be displayed according to the panel luminance of the display and the first output luminance of the display, the method further includes: and acquiring a brightness statistical histogram of the first output brightness.
Optionally, after obtaining the input luminance and the output luminance in the luminance display range and establishing a luminance mapping relationship between the input luminance and the output luminance, the method further includes: obtaining compensation brightness according to the panel brightness and the first output brightness; the obtaining a second output brightness according to the target input brightness and the brightness mapping relationship includes: and acquiring the second output brightness according to the target input brightness, the brightness mapping relation and the compensation brightness.
Optionally, after obtaining the second output luminance according to the target input luminance and the luminance mapping relationship, the method further includes: acquiring compensation brightness according to the panel brightness and the first output brightness; and obtaining the display brightness after brightness compensation according to the second output brightness and the compensation brightness.
Optionally, the obtaining a brightness display range of an image to be displayed according to a panel brightness of a display and a first output brightness of the display includes: and obtaining the brightness display range of each level of brightness according to the panel brightness and each level of brightness in the brightness statistical histogram.
Optionally, the obtaining input luminance and output luminance within the luminance display range, and establishing a luminance mapping relationship between the input luminance and the output luminance includes: and acquiring the input brightness and the output brightness in the brightness display range of each-stage brightness, and establishing a brightness mapping relation between the input brightness and the output brightness.
Optionally, the obtaining input luminance and output luminance and establishing a luminance mapping relationship between the input luminance and the output luminance includes: and acquiring the compensation brightness of each level of brightness according to the panel brightness and the brightness statistical histogram. And obtaining the output brightness of each-order brightness according to the input brightness and the compensation brightness of each-order brightness. And establishing a brightness mapping relation between the input brightness and the output brightness of each step of brightness according to the input brightness and the output brightness of each step of brightness.
Optionally, the obtaining a second output luminance according to the target input luminance and the luminance mapping relationship includes: and acquiring second output brightness corresponding to each level of brightness according to the target input brightness and the brightness mapping relation.
Optionally, after obtaining the second output brightness corresponding to each level of brightness according to the target input brightness and the brightness mapping relationship, the method further includes: acquiring the compensation brightness of each-order brightness according to the panel brightness and the brightness statistical histogram; and obtaining the display brightness after brightness compensation according to the second output brightness corresponding to each step of brightness and the compensation brightness of each step of brightness.
In a second aspect, an embodiment of the present application provides an image display apparatus, including: the device comprises an acquisition module, a mapping module and an output module. The acquisition module is used for acquiring the brightness display range of the image to be displayed according to the panel brightness of the display and the first output brightness of the display; the first output brightness is the display brightness of the last frame of image on the display. And the mapping module is used for acquiring input brightness and output brightness in the brightness display range and establishing a brightness mapping relation between the input brightness and the output brightness. The acquisition module is also used for acquiring target input brightness; the target input brightness is the original brightness of the image to be displayed. The output module is used for acquiring second output brightness according to the target input brightness and the brightness mapping relation; the second output brightness is the display brightness of the image to be displayed.
Optionally, the obtaining module is further configured to obtain the compensation brightness according to the panel brightness and the first output brightness. And obtaining the output brightness according to the input brightness and the compensation brightness. And establishing a brightness mapping relation between the input brightness and the output brightness according to the input brightness and the output brightness.
Optionally, the obtaining module is further configured to obtain a luminance statistical histogram of the first output luminance.
Compared with the prior art, the image display method and the image display device provided by the embodiment of the application acquire the panel brightness of the display and the first output brightness of the display to obtain the brightness display range of the image to be displayed, and establish the brightness mapping relation between the input brightness and the output brightness in the brightness display range. The brightness mapping relation is combined with the information of the display, so that the target input brightness of the image to be displayed is obtained as the second output brightness according to the brightness mapping relation, the second output brightness is higher than the display brightness of the image to be displayed in the prior art, and the display dims the brightness of the image to be displayed, so that the second output brightness obtained by the image display method provided by the application is sent to the display for display, and a good display effect can be obtained.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an image display system according to an embodiment of the present application;
fig. 2 is a schematic flowchart of an image display method according to an embodiment of the present disclosure;
FIG. 3 is a schematic flowchart of an image display method according to another embodiment of the present application;
FIG. 4 is a schematic flowchart of an image display method according to another embodiment of the present application;
FIG. 5 is a luminance statistical histogram;
FIG. 6 is a schematic flowchart of an image display method according to another embodiment of the present application;
FIG. 7 is a flowchart illustrating an image display method according to another embodiment of the present application;
FIG. 8 is a flowchart illustrating an image display method according to another embodiment of the present application;
FIG. 9 is a flowchart illustrating an image display method according to another embodiment of the present application;
FIG. 10 is a flowchart illustrating an image display method according to another embodiment of the present application;
fig. 11 is a schematic structural diagram of an image display device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Compared with a common image, the HDR image can display more details, and has stronger picture sense and closer visual effect received by human eyes. However, HDR video needs to be displayed on a television set supporting the HDR technology, and an ordinary television set cannot directly display HDR images. However, the cost of replacing the television is relatively high, so that the set-top box supporting the HDR technology can be used in combination with the ordinary television, so that the ordinary television displays the HDR image.
The set top box supporting the HDR technology is used in cooperation with the television with the HDR function, so that the television with the HDR function can obtain a better display effect when displaying HDR images.
Fig. 1 is a schematic structural diagram of an image display system according to an embodiment of the present application, and as shown in fig. 1, the image display system includes: a set-top box 101 and a display 102.
The set-top box 101 is connected to the display 102, and the set-top box 101 receives the source video data and sends the processed image to the display for display by the display. The source video is a video to be displayed and processed by the set-top box 101, and contains continuous multi-frame images. The set top box 101 processes the source video in such a way that each frame of image in the source video is processed according to the display timing sequence.
Taking an example that the display 102 displays an image processed by the set-top box 101 in the prior art as an example, with continuing reference to fig. 1, the set-top box 101 is configured to receive source video data, process the image of the source video data through an HDR technology, adjust the image into an image suitable for display, and send the image to the display 102 for display.
Due to the limitation of the range of the brightness displayed by the display 102 and the dimming of the brightness of the display 102 for achieving the energy saving effect, when the display 102 displays the image transmitted by the set-top box 101, the adjusted image is dimmed at the display 102, and therefore, the actual brightness of the image displayed at the display 102 is darker than the expected brightness, so that the image displayed at the display 102 has poor display effect.
In view of the above problems, the following embodiments of the present application provide a technical solution, and a core improvement point of the technical solution is that, when brightness adjustment is performed on a set-top box side, a brightness display range of an image to be displayed is determined by combining a panel brightness of a display and a brightness displayed by a previous frame of image on the display, and brightness mapping is performed in the brightness display range, so that the display can reasonably display an adjusted image obtained after the mapping on the display.
The technical solution of the present application is described below with reference to a specific embodiment, fig. 2 is a schematic flowchart of an image display method provided in an embodiment of the present application, where the schematic flowchart may be executed by a controller in the set top box 101 corresponding to fig. 1, and as shown in fig. 2, the method includes:
s201, obtaining a brightness display range of an image to be displayed according to the panel brightness of the display and the first output brightness of the display.
The panel brightness is the maximum brightness value that the display panel can display. The panel brightness is a fixed value, and the value is determined by the material of the panel. The panel brightness is stored in the screen parameters of the display chip. The display may transmit the panel brightness value to the set-top box through an HDMI (High Definition Multimedia Interface) Interface.
The first output brightness is the display brightness of the previous frame image on the display. The first output brightness is statistically derived from the display.
When the global backlight is adjusted, the first output brightness of a frame of image is a fixed value, and the step of obtaining the brightness display range of the image to be displayed is as follows:
note that the acquired panel luminance and the first output luminance need to be normalized to the same luminance range.
Optionally, the panel brightness and the first output brightness are both normalized to 1024 (i.e., 10 BT). The maximum threshold value of the luminance display range can be obtained by the following formula:
Targetl1＝(Panel*Prel)>>10；
wherein Panel represents Panel brightness; prel denotes the first output luminance; targetl1 denotes a maximum threshold value of a luminance display range obtained at the time of global backlight adjustment; "+" indicates a multiplication number; "> >10" indicates that the value obtained "(Panel × Prel)" is shifted to the right by 10BT so that the maximum threshold value of the luminance display range of Targetl1 obtained is normalized to be within the same luminance range as the Panel luminance and the first output luminance.
Targetl1 is obtained by the above formula, and a luminance display range of 0 to Targetl1 can be obtained.
It should be noted that the actual luminance represented by the same value in different luminance ranges may be different, for example, in the first luminance range of 0 to 256 and the second luminance range of 0 to 1024, the actual luminance represented by only 0 luminance value in the two luminance ranges is the same, and the actual luminance represented by 256 in the first luminance range is the same as the actual luminance represented by 1024 in the second luminance range. Therefore, the maximum threshold of the Targetl1 luminance display range, the Prel first output luminance, and the Panel luminance need to be normalized to the same range for easy calculation.
S202, in the brightness display range, obtaining input brightness and output brightness, and establishing a brightness mapping relation between the input brightness and the output brightness.
During global backlight adjustment, a plurality of input luminances are selected in the luminance display range 0-Targetl1, and output luminances corresponding to the input luminances are obtained. Alternatively, 16 to 32 input luminances may be selected, and an output luminance corresponding to each input luminance may be acquired.
Through the selected multiple input brightness and multiple output brightness, the established brightness mapping relation can be a mapping curve or a mapping table.
And S203, acquiring target input brightness. The target input brightness is the original brightness of the image to be displayed.
The metadata comprises basic information such as the attribute, the brightness value and the like of the source video, and the set top box acquires the original brightness of the image to be displayed from the metadata of the source video.
And S204, acquiring second output brightness according to the target input brightness and the brightness mapping relation. The second output brightness is the display brightness of the image to be displayed.
And displaying the image to be displayed according to the second output brightness.
It should be noted that, in the source video, a plurality of frames of images are included, and each mapping according to the luminance mapping relationship is performed only for one frame of image (i.e., an image to be displayed). After each time of mapping and displaying, the mapping relationship needs to be updated according to the current previous frame image, and a new round of mapping is performed according to the current image to be displayed.
In the image display method provided by this embodiment, a luminance display range of an image to be displayed is obtained by acquiring panel luminance of a display and first output luminance of the display, and a luminance mapping relationship between input luminance and output luminance is established in the luminance display range. And obtaining a second output brightness according to the target input brightness of the image to be displayed according to the brightness mapping relation, wherein the brightness mapping relation is combined with the information of the display, and even if the display dims the brightness of the image to be displayed, the obtained second output brightness is stronger than the display brightness of the image to be displayed in the prior art, so that the second output brightness obtained by the image display method provided by the application is sent to the display for display, and a good display effect can be obtained.
To prevent the image to be displayed from becoming dark on the whole screen of the display side, pixel compensation may be performed on the image to be displayed when a mapping relationship is established on the basis of the embodiment provided in fig. 2, specifically, fig. 3 is a flowchart of an image display method according to another embodiment of the present application, as shown in fig. 3, S202 includes:
s202-1a, obtaining the compensation brightness according to the panel brightness and the first output brightness.
Note that the compensation luminance is luminance that needs to be increased.
Alternatively, the compensation brightness may be obtained by the following formula:
CompData1＝Panel-[(Panel*Prel)>>10]；
where CompData1 represents the compensated brightness at the time of global backlight adjustment. Compdata1 is a fixed value for one frame of an image to be displayed.
And S202-1b, obtaining output brightness according to the input brightness and the compensation brightness.
In the case where the compensation luminance is considered, the obtained output luminance is stronger than the case where the compensation luminance is not considered. For example, when the compensation luminance is not considered, the input luminance value is 800, and the corresponding output luminance value is 600. When the compensation luminance is considered and the compensation luminance value is 10, since the compensation luminance is to brighten the image to be displayed, the obtained output luminance value is 610.
S202-1c, establishing a brightness mapping relation between the input brightness and the output brightness according to the input brightness and the output brightness.
In the image display method provided by this embodiment, by introducing the compensation brightness when the brightness mapping relationship is established, the brightness obtained by the to-be-displayed image on the set top box side is increased, and the dimmed brightness when the display displays the to-be-displayed image is compensated, so that the display can obtain a good display effect when actually displaying.
Alternatively, the introduction of the compensation brightness may also be performed after S202 in fig. 2, by establishing a brightness mapping relationship only by the input brightness and the output brightness, and introducing the compensation brightness on the basis of the output brightness obtained by the brightness mapping relationship. Fig. 7 is a schematic flowchart of an image display method according to another embodiment of the present application, and specifically, as shown in fig. 7, after S202, the method further includes:
and S205, acquiring the compensation brightness according to the panel brightness and the first output brightness.
S204, comprising:
and S204a, acquiring second output brightness according to the target input brightness, the brightness mapping relation and the compensation brightness.
Alternatively, the introduction of the compensation brightness may also perform brightness compensation on the second output brightness by the compensation brightness after the second output brightness is obtained in S204 in fig. 2. Fig. 8 is a schematic flowchart of an image display method according to another embodiment of the present application, and specifically, as shown in fig. 8, after S204, the method further includes:
and S206, acquiring the compensation brightness according to the panel brightness and the first output brightness.
And S207, acquiring the display brightness after brightness compensation according to the second output brightness and the compensation brightness. It should be noted that, in the above embodiments, the compensation brightness is introduced at the set-top box side for brightness compensation, and the brightness compensation is mainly used for adjusting the brightness of the mapping result when the mapping relationship is established or is mapped, and the essence is to raise the brightness of the image before the image is displayed on the television. The reason why the compensation brightness is introduced in fig. 7 and fig. 8 for brightness compensation is similar to that in the foregoing embodiment, and is not repeated herein.
In the area backlight adjustment, a luminance statistical histogram of a previous frame of image needs to be collected, and on the basis of fig. 2, an image display method under the area backlight adjustment is proposed, and fig. 4 is a schematic flow diagram of an image display method according to another embodiment of the present application, specifically, as shown in fig. 4, the method further includes:
s301, acquiring a brightness statistical histogram of the first output brightness.
It should be noted that the luminance statistical histogram is a bar chart, and the distribution of the luminance data is recorded. The abscissa of the luminance statistical histogram represents the luminance of the image, and from left to right, the luminance is gradually increased, i.e. the transition from full black to full white is completed. The ordinate of the luminance statistical histogram represents the distribution of different luminance values.
As follows, a 64-step statistical histogram of luminance in the luminance range of 0 to 1024 is taken as an example for explanation:
fig. 5 is a luminance statistical histogram, and referring to fig. 5, the abscissa i represents the order, and in fig. 5, the abscissa i represents the luminance statistical histogram of 64 orders, so that each order represents a luminance range of 16 luminance values, specifically, when i is 1, that is, the 1 st order luminance range is [0, 16 ]; when i is 2, i.e. the 2 nd order luminance range is [16, 32 ].
In fig. 5, the ordinate n represents the frequency, specifically, the number of pixels in the ith-order luminance range of the image. For example, in the luminance statistical histogram, the frequency n of the 2 nd order is 10, and the frequency of the 4 th order is 0.
Fig. 6 is a schematic flow chart of an image display method according to another embodiment of the present application, as shown in fig. 6, S201 includes:
s201-1, obtaining a brightness display range of each level of brightness according to the panel brightness and each level of brightness in the brightness statistical histogram.
Continuing with the 64 th order luminance statistical histogram in fig. 5 as an example, the maximum threshold value of each order luminance display range can be calculated by the following formula:
Targetl2[i]＝[(i<<4)*Panel]>>10；
wherein 0-i-woven fabric is composed of (i) and (n) 64; "i < <4" means that the luminance i is left-shifted by 4BT (i.e., 16) so that the obtained luminance i is normalized to be within the luminance range of 0-1024 of the panel luminance; targetl2[ i ] is the maximum threshold value of the ith-order luminance display range.
Wherein, in the calculation of Targetl2[ i]In the formula (2), only if n corresponding to i is greater than 0, the corresponding Targetl2[ i]. With continued reference to FIG. 5, when i is 1, n corresponds to (1) If i is not 0, targetl2[1 ] is calculated when i is 1]. When i is 4, corresponding n (4) Since i is 0, the maximum threshold value of the corresponding 4 th-order luminance display range when i is 4 is not calculated. In FIG. 5, for each i meeting the above condition, targetl2[ i ] corresponding to i is calculated]。
The luminance display range of the ith order is 0-Targetl2[ i ].
With continued reference to fig. 6, S202 includes:
s202-2, acquiring input brightness and output brightness in the brightness display range of each step of brightness, and establishing a brightness mapping relation between the input brightness and the output brightness.
Optionally, in a display range corresponding to each-order brightness, the input brightness and the output brightness in the display range are selected in a cubic interpolation manner. The established brightness mapping relation can be a brightness mapping curve. Wherein, the brightness mapping curve can be established by a least square method.
Continuing with the example of 64 th-order luminance statistical histogram in FIG. 5, n in 64 th-order luminance mapping histogram is calculated (i) And summarizing the brightness mapping relations of all the orders which are not 0 to form a total mapping relation corresponding to the image to be displayed. And mapping the image to be displayed according to the total mapping relation to obtain a processed image, and displaying the processed image on a display.
In the image display method provided by the application, the display frequency of each order of brightness is counted through regional backlight adjustment, the display range of each order of brightness is obtained, the input brightness and the output brightness can be selected in each order of brightness in a targeted manner to establish a brightness mapping relation, namely, in the order of brightness with the brightness frequency n of 0, the selection point of the input brightness and the output brightness is not carried out, namely, the brightness mapping relation is not established in the order of brightness with the frequency n of 0. In the brightness with larger brightness frequency n, some input brightness and output brightness can be selected more to establish more accurate brightness mapping relation.
Optionally, the present application further provides an image display method: specifically, fig. 9 is a flowchart illustrating an image display method according to another embodiment of the present application, as shown in fig. 9, S202 includes:
s202-3a, obtaining the compensation brightness of each-stage brightness according to the panel brightness and the brightness statistical histogram.
Optionally, when the regional backlight is adjusted, the luminance statistical histogram corresponding to the previous frame of image is collected, so that the luminance compensation can be performed accurately on each step of luminance. The compensated luminance can be calculated by:
CompData2[i]＝Panel-Targetl2[i]；
where CompData2[ i ] is the compensation luminance for the ith order luminance.
It should be noted that, for the area backlight adjustment, the compensation brightness of each step of brightness needs to be calculated. And performing corresponding brightness compensation on the brightness of each order according to the calculated compensation brightness.
And S202-3b, obtaining the output brightness of each step of brightness according to the input brightness and the compensation brightness of each step of brightness. S202-3c, establishing a brightness mapping relation between the input brightness and the output brightness of each brightness according to the input brightness and the output brightness of each brightness.
It should be noted that, in steps S202-3b and S202-3c, the method for luminance compensation is the same as the method for luminance compensation in the above embodiment, and is not repeated herein.
Optionally, fig. 10 is a schematic flowchart of an image display method according to another embodiment of the present application, as shown in fig. 10, S204 includes:
and S204b, acquiring second output brightness corresponding to each level of brightness according to the target input brightness and the brightness mapping relation.
It should be noted that, during the area backlight adjustment, the luminance mapping relationship is a mapping relationship between the input luminance and the output luminance of each luminance level, and the second output luminance is obtained according to the mapping relationship, and the second output luminance includes the output luminance obtained according to the mapping relationship for each luminance level.
Optionally, with continued reference to fig. 10, after S204b, the method further includes:
and S208, acquiring the compensation brightness of each-stage brightness according to the panel brightness and the brightness statistical histogram.
And S209, acquiring the display brightness after brightness compensation according to the output brightness of each step of brightness and the compensation brightness of each step of brightness.
It should be noted that the reason for introducing the compensation brightness for the brightness compensation is similar to that in the foregoing embodiments, and is not repeated herein.
An image display device for implementing the above method class embodiments is provided below, and specifically, fig. 11 is a schematic structural diagram of an image display device according to an embodiment of the present application, as shown in fig. 10, and includes: an acquisition module 401, a mapping module 402 and an output module 403.
The obtaining module 401 is configured to obtain a luminance display range of an image to be displayed according to a panel luminance of a display and a first output luminance of the display; the first output brightness is the display brightness of the previous frame image on the display.
The mapping module 402 is configured to obtain input luminance and output luminance within a luminance display range, and establish a luminance mapping relationship between the input luminance and the output luminance.
The obtaining module 401 is further configured to obtain target input brightness; the target input brightness is the original brightness of the image to be displayed.
The output module 403 is configured to obtain a second output luminance according to the target input luminance and the luminance mapping relationship. The second output brightness is the display brightness of the image to be displayed.
Optionally, the obtaining module 401 is further configured to obtain the compensation brightness according to the panel brightness and the first output brightness. And obtaining the output brightness according to the input brightness and the compensation brightness. And establishing a brightness mapping relation between the input brightness and the output brightness according to the input brightness and the output brightness.
Optionally, the obtaining module 401 is further configured to obtain a luminance statistical histogram of the first output luminance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. An image display method, comprising:
obtaining a brightness display range of an image to be displayed according to panel brightness of a display and first output brightness of the display; the first output brightness is the display brightness of the previous frame image on the display;
acquiring input brightness and output brightness in the brightness display range, and establishing a brightness mapping relation between the input brightness and the output brightness;
acquiring target input brightness; the target input brightness is the original brightness of the image to be displayed;
acquiring second output brightness according to the target input brightness and the brightness mapping relation; the second output brightness is the display brightness of the image to be displayed;
and after each mapping and displaying, updating the brightness mapping relation according to the current previous frame image, and performing a new mapping according to the current image to be displayed.
2. The image display method according to claim 1, wherein the obtaining input luminance and output luminance and establishing a luminance mapping relationship between the input luminance and the output luminance comprises:
acquiring compensation brightness according to the panel brightness and the first output brightness;
obtaining the output brightness according to the input brightness and the compensation brightness;
and establishing a brightness mapping relation between the input brightness and the output brightness according to the input brightness and the output brightness.
3. The image display method of claim 1, wherein after obtaining a second output luminance according to the target input luminance and the luminance mapping relationship, further comprising:
obtaining compensation brightness according to the panel brightness and the first output brightness;
and obtaining the display brightness after brightness compensation according to the second output brightness and the compensation brightness.
4. The image display method according to claim 1, wherein before obtaining the luminance display range of the image to be displayed based on the panel luminance of the display and the first output luminance of the display, the method further comprises:
and acquiring a brightness statistical histogram of the first output brightness.
5. The image display method according to claim 4, wherein obtaining a luminance display range of an image to be displayed according to a panel luminance of a display and a first output luminance of the display comprises:
and obtaining the brightness display range of each level of brightness according to the panel brightness and each level of brightness in the brightness statistical histogram.
6. The image display method according to claim 5, wherein the acquiring input luminance and output luminance in the luminance display range, and establishing a luminance mapping relationship between the input luminance and the output luminance comprises:
and acquiring the input brightness and the output brightness in the brightness display range of each step of brightness, and establishing a brightness mapping relation between the input brightness and the output brightness.
7. The image display method according to claim 4, wherein the obtaining input luminance and output luminance and establishing a luminance mapping relationship between the input luminance and the output luminance comprises:
obtaining the compensation brightness of each level of brightness according to the panel brightness and the brightness statistical histogram;
obtaining the output brightness of each order of brightness according to the input brightness and the compensation brightness of each order of brightness;
and establishing a brightness mapping relation between the input brightness and the output brightness of each step of brightness according to the input brightness and the output brightness of each step of brightness.
8. The image display method according to claim 6, wherein the obtaining a second output luminance according to the target input luminance and the luminance mapping relation comprises: and acquiring second output brightness corresponding to each-order brightness according to the target input brightness and the brightness mapping relation.
9. The image display method according to claim 8, wherein after obtaining the second output luminance corresponding to each level of luminance according to the target input luminance and the luminance mapping relationship, the method further comprises:
acquiring the compensation brightness of each-order brightness according to the panel brightness and the brightness statistical histogram;
and obtaining the display brightness after brightness compensation according to the second output brightness corresponding to each-order brightness and the compensation brightness of each-order brightness.
10. An image display apparatus, comprising: the device comprises an acquisition module, a mapping module and an output module;
the acquisition module is used for acquiring the brightness display range of the image to be displayed according to the panel brightness of the display and the first output brightness of the display; the first output brightness is the display brightness of the previous frame image on the display;
the mapping module is used for acquiring input brightness and output brightness in the brightness display range and establishing a brightness mapping relation between the input brightness and the output brightness;
the acquisition module is also used for acquiring target input brightness; the target input brightness is the original brightness of the image to be displayed;
the output module is used for acquiring second output brightness according to the target input brightness and the brightness mapping relation; the second output brightness is the display brightness of the image to be displayed;
and after each mapping and displaying, updating the brightness mapping relation according to the current previous frame image, and performing a new mapping according to the current image to be displayed.
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