CN114710652A - Projection picture adjusting method and device - Google Patents
Projection picture adjusting method and device Download PDFInfo
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- CN114710652A CN114710652A CN202210411570.4A CN202210411570A CN114710652A CN 114710652 A CN114710652 A CN 114710652A CN 202210411570 A CN202210411570 A CN 202210411570A CN 114710652 A CN114710652 A CN 114710652A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3188—Scale or resolution adjustment
Abstract
The invention provides a projection picture adjusting method and a device, which are characterized in that the video resolution of an initial projection picture is obtained, the central point of the maximum projection area of a fixed lens projector is used as the central point of the projection picture, projection is executed based on the video resolution to obtain the initial projection picture, when the parameter corresponding to the initial projection picture does not meet the requirement, an adjusting parameter is obtained, the position and/or the size of the projection picture is adjusted based on the adjusting parameter, the adjusted projection picture is positioned in the maximum projection area, the parameter meets the requirement, and the projection picture is adjusted under the condition that the positions of the fixed lens projector and a curtain are not changed, so that the aim of saving manpower and material resources is fulfilled.
Description
Technical Field
The invention relates to the technical field of laser projection, in particular to a projection picture adjusting method and device.
Background
At present, two types of projectors including a fixed lens and a displaceable lens generally exist in the market, and in application, the position and the size of a projection picture are often required to be adjusted, wherein the displaceable lens projector can adjust the position and the size of the projection picture by adjusting the lens, the lens of the fixed lens projector is fixed, and the position of the projector is required to be changed, so that the position and the size of the projection picture are adjusted.
In the prior art, the installation position of the fixed lens projector is adjusted manually, so that the projection image is often deviated in an easily vibrating environment, the installation position is required to be adjusted manually frequently to adjust the position and size of the projection image, and manpower and material resources are wasted in the process.
Therefore, the problem that manpower and material resources are wasted due to the fact that the position and the size of a projection picture are adjusted by manually adjusting the installation position of the fixed lens projector is the problem which needs to be solved at present.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for adjusting a projection image, so as to achieve the purpose of saving manpower and material resources when adjusting the projection image.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the first aspect of the embodiment of the invention discloses a projection picture adjusting method, which is applied to a fixed lens projector and comprises the following steps:
acquiring the video resolution of an initial projection picture;
taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain the initial projection picture;
when the parameters corresponding to the initial projection picture do not meet the requirements, obtaining adjustment parameters;
and adjusting the position and/or size of the projection picture based on the adjustment parameters, wherein the adjusted projection picture is positioned in the maximum projection area and meets parameter requirements.
Preferably, when the parameter corresponding to the initial projection picture does not meet the requirement, acquiring an adjustment parameter, including:
when the width of the initial projection picture is larger than the width of a target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and zooming the initial projection picture based on the zoom value to obtain the adjusted projection picture, enabling the zoomed projection picture to be in the maximum projection area, enabling the width and the height to be respectively equal to the width and the height of the target projection area, enabling the value range of the zoom value to be less than 100%, and enabling the width and the height of the adjusted projection picture to be equal to the product of the width and the height of the projection picture before adjustment and the zoom value.
Preferably, when the parameter corresponding to the initial projection picture does not meet the requirement, acquiring an adjustment parameter, including:
when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and adjusting the aspect ratio of the initial projection picture based on the aspect ratio parameter, so that the adjusted projection picture is positioned in the maximum projection area and is consistent with the aspect ratio of the target projection area.
Preferably, when the parameter corresponding to the initial projection picture does not meet the requirement, acquiring an adjustment parameter, including:
randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and transversely translating and/or longitudinally translating the projection picture based on the translation coordinate value and the rectangular coordinate system, so that the translated projection picture is positioned in the maximum projection area and meets the parameter requirement.
Preferably, the method further comprises:
determining and storing coordinates of the central point of the projection picture after the transverse translation and/or the longitudinal translation;
and when the projection picture is re-input, projecting the re-input projection picture based on the central point coordinate.
The second aspect of the embodiments of the present invention discloses a projection picture adjusting apparatus, including:
the first acquisition unit is used for acquiring the video resolution of an initial projection picture;
the projection unit is used for taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain the initial projection picture;
the second acquisition unit is used for acquiring an adjustment parameter when the parameter corresponding to the initial projection picture does not meet the requirement;
and the adjusting unit is used for adjusting the position and/or the size of the projection picture based on the adjusting parameters, and the adjusted projection picture is positioned in the maximum projection area and meets the parameter requirements.
Preferably, the second obtaining unit is specifically configured to: when the width of the initial projection picture is larger than the width of a target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value;
correspondingly, the adjusting unit is specifically configured to:
and zooming the initial projection picture based on the zoom value to obtain the adjusted projection picture, enabling the zoomed projection picture to be in the maximum projection area, enabling the width and the height to be respectively equal to the width and the height of the target projection area, enabling the value range of the zoom value to be less than 100%, and enabling the width and the height of the adjusted projection picture to be equal to the product of the width and the height of the projection picture before adjustment and the zoom value.
Preferably, the second obtaining unit is specifically configured to: when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter;
correspondingly, the adjusting unit is specifically configured to:
and adjusting the aspect ratio of the initial projection picture based on the aspect ratio parameter, so that the adjusted projection picture is positioned in the maximum projection area and is consistent with the aspect ratio of the target projection area.
Preferably, the second obtaining unit is specifically configured to: randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area;
correspondingly, the adjusting unit is specifically configured to: and transversely translating and/or longitudinally translating the projection picture based on the translation coordinate value and the rectangular coordinate system, so that the translated projection picture is positioned in the maximum projection area and meets the parameter requirement.
Preferably, the projection unit is further configured to:
determining and storing coordinates of the central point of the projection picture after the transverse translation and/or the longitudinal translation; and when the projection picture is re-input, projecting the re-input projection picture based on the central point coordinate.
Based on the method and the device for adjusting the projection picture provided by the embodiment of the invention, the video resolution of the initial projection picture is obtained; taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain the initial projection picture; when the parameters corresponding to the initial projection picture do not meet the requirements, obtaining adjustment parameters; and adjusting the position and/or size of the projection picture based on the adjustment parameters, wherein the adjusted projection picture is in the maximum projection area. According to the scheme, under the condition that the position of the fixed lens projector is not changed, the position and/or the size of the projection picture are/is adjusted by obtaining the adjustment parameters, the projection picture is ensured to be in the maximum projection area, and the parameters meet the requirements, so that the purposes of saving manpower and material resources are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for adjusting a projection image according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another method for adjusting a projection image according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for adjusting a projection image according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating another method for adjusting a projection image according to an embodiment of the present disclosure;
FIG. 5 is a diagram of an example of translating a projection screen according to an embodiment of the present invention;
FIG. 6 is a diagram of an example of translating a projection screen according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating another method for adjusting a projection image according to an embodiment of the present invention;
FIG. 8 is a diagram of an example of translating a projection screen according to an embodiment of the present invention;
fig. 9 is a structural diagram of a projection image adjusting apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
In this application, 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 phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As can be seen from the background art, the projection image adjustment of the conventional fixed lens projector mainly involves manually moving the fixed lens projector, which cannot achieve the purpose of saving manpower and material resources.
Therefore, in the present disclosure, under the condition that the positions of the fixed lens projector and the curtain are not changed, the position and/or the size of the projection picture are adjusted by obtaining the adjustment parameters, and the projection picture is ensured to be within the maximum projection area and to be matched with the target projection area, so as to achieve the purpose of saving manpower and material resources.
As shown in fig. 1, which is a flowchart of a method for adjusting a projection image according to an embodiment of the present invention, the method is applied to a fixed lens projector, and mainly includes the following steps:
step S101: and acquiring the video resolution of the initial projection picture.
Step S102: and taking the central point of the maximum projection area of the fixed-lens projector as the central point of the projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
It should be noted that, when the fixed-lens projector initially projects, the projection image is projected to the center of the maximum projection area by default, and the projection image is projected with the resolution of the video itself, and the projection image cannot exceed the maximum projection area and meets the parameter requirements.
Step S103: and when the parameters corresponding to the initial projection picture do not meet the requirements, obtaining the adjustment parameters.
In step S103, the condition that the parameters corresponding to the initial projection picture do not meet the requirements mainly includes: when the width of the initial projection picture is larger than the width of the target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value; when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter; and randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area.
Wherein, the target projection area is the projection curtain area.
Step S104: and adjusting the position and/or the size of the projection picture based on the adjusting parameters.
In step S104, the adjustment parameters include an aspect ratio parameter, a zoom value, and a translational coordinate value, and according to a condition that the parameters do not meet the requirements, a corresponding adjustment parameter type is obtained, and the projection image is adjusted accordingly, so that the projection image is ensured to be in the maximum display area and the parameters meet the requirements, otherwise, the operation is prompted to cross the boundary.
The adjustment process of the initial projection picture based on the aspect ratio parameter, the zoom value and the translation coordinate value is specifically described by the following embodiments.
Based on the projection picture adjusting method disclosed by the embodiment of the invention, in the scheme, when the parameter corresponding to the initial projection picture does not meet the requirement, under the condition of not changing the positions of the fixed lens projector and the curtain, the position and/or the size of the projection picture are/is adjusted by acquiring the adjusting parameter, and the projection picture is ensured to be in the maximum projection area and to be matched with the target projection area, so that the aim of saving manpower and material resources is fulfilled.
In an embodiment, with reference to the projection picture adjusting method disclosed in the foregoing embodiment of the present invention, when the width of the initial projection picture is greater than the width of the target projection area, or when the height of the initial projection picture is greater than the height of the target projection area, the projection picture is adjusted, and the specific implementation process is as shown in fig. 2, and mainly includes:
step S201: and acquiring the video resolution of the initial projection picture.
Step S202: and taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
Step S203: and when the width of the initial projection picture is larger than the width of the target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value.
In step S203, the range of the zoom value is less than 100%.
Step S204: the initial projection screen is scaled based on the scaling value.
In step S204, the width and height of the initial projection screen are multiplied by scaling values, respectively, to obtain scaled width and height, and the projection screen is projected with the scaled width and height. And if the zoomed projection picture is in the maximum projection area, otherwise, the operation is prompted to cross the border, and the width and the height of the zoomed projection picture are both equal to the width and the height of the target projection area.
In a specific embodiment, the width and height of the maximum projection area are 10 meters and 4 meters, respectively, the width and height of the initial projection screen are 10 meters and 5 meters, respectively, then the zoom value is obtained as 80%, the width and height of the initial projection screen are multiplied by 80% during zooming, the width and height of the zoomed projection screen obtained as 8 meters and 4 meters, respectively, are both less than or equal to the width and height of the maximum projection area, and the projection screen is projected with the zoomed width and height.
In the embodiment of the invention, when the width of the initial projection picture is larger than the width of the target projection area, or the height of the initial projection picture is larger than the height of the target projection area, under the condition of not changing the positions of the fixed lens projector and the curtain, the zoom value is obtained, and the initial projection picture is zoomed and adjusted based on the zoom value, so that the projection picture is ensured to be in the maximum projection area and the parameters meet the requirements, and the aim of saving manpower and material resources is fulfilled.
In an embodiment, with reference to the projection image adjusting method disclosed in the foregoing embodiment of the present invention, when the aspect ratio of the initial projection image is not consistent with the aspect ratio of the target projection area, the initial projection image is adjusted, and a specific implementation process is shown in fig. 3, and mainly includes:
step 301: and acquiring the video resolution of the initial projection picture.
Step 302: and taking the central point of the maximum projection area of the fixed-lens projector as the central point of the projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
Step 303: and when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter.
In step 303, the target projection area is the projection curtain area; the aspect ratio parameters include automatic, 4:3, 16:9, 15:9 and 16:10 types.
Step 304: and adjusting the aspect ratio of the initial projection picture based on the aspect ratio parameter.
In step 304, referring to table 1, where X is the width of the target projection area and Y is the height of the target projection area, when the aspect ratio is adjusted, assuming that the height of the target projection area is 3 meters and the width is 12 meters, the height of the unadjusted projection screen is 2 meters and the width is 4 meters, the projection screen is adjusted at an aspect ratio of 4:3, and based on the calculation method shown in table 1, the adjusted projection screen is obtained to have a height of 3 meters, a width of 4 meters and an aspect ratio of 4:3, and is consistent with the aspect ratio of the target projection area.
Table 1:
| aspect ratio parameter | Width of projected picture | Height of projected picture |
| Automatic | Aspect ratio of Y input video | Y |
| 4:3 | Y*4:3 | Y |
| 16:9 | Y*16:9 | Y |
| 15:9 | Y*15:9 | Y |
| 16:10 | Y*16:10 | Y |
In the embodiment of the invention, when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, the aspect ratio parameter is obtained under the condition of not changing the positions of the fixed lens projector and the curtain, and the aspect ratio of the initial projection picture is adjusted based on the aspect ratio parameter, so that the projection picture is ensured to be consistent with the target projection area in the maximum projection area, and the aim of saving manpower and material resources is fulfilled.
In an embodiment, with reference to the projection picture adjusting method disclosed in the above embodiment of the present invention, a rectangular coordinate system is established by arbitrarily selecting a point in the maximum projection area as the origin of coordinates, and when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area, the position of the initial projection picture is adjusted, and the specific implementation process is as shown in fig. 4, and mainly includes:
step S401: and acquiring the video resolution of the initial projection picture.
Step S402: and taking the central point of the maximum projection area of the fixed-lens projector as the central point of the projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
Step S403: and randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system.
In step S403, preferably, as shown in fig. 5, an intersection of the upper left corner of the width and the height of the maximum projection region is selected as a coordinate origin, and a rectangular coordinate system is established with the width of the maximum projection region as an X-axis and the height as a Y-axis.
Step S404: and when the coordinate values of the initial projection picture are inconsistent with the coordinate values of the target projection area, acquiring translation coordinate values.
In step S404, when the coordinate of any point of the initial projection image is not within the target projection area, it indicates that the initial projection image is not matched with the target projection area, for example, as shown in fig. 6, assuming that the abscissa range of the maximum projection area is 0 to 20, the ordinate range is 0 to 10, the abscissa range of the target projection area is 3 to 18, and the ordinate range is 3 to 8, when the abscissa value of any point of the initial projection image is not within the range of 3 to 18, or the ordinate value is not within the range of 3 to 8, the panning coordinate value is obtained.
Wherein, the target projection area is the projection curtain area.
Step S405: the initial projection screen is translated laterally and/or longitudinally based on the translation coordinate values.
In step S405, the translational coordinate values include translational abscissa values and translational ordinate values, and based on the amount of the abscissa values and/or the amount of the ordinate values of the initial projection image exceeding the target projection area, the translational abscissa values and/or the translational ordinate values are determined and based on the translational abscissa values and/or the translational ordinate values, the initial projection image is translated transversely and/or longitudinally, so that the translated projection image is within the maximum projection area and is matched with the target projection area. As shown in fig. 6, if both the abscissa value amount and the ordinate value amount beyond the target projection area are 1, both the translational abscissa value and the translational ordinate value are 1.
In one embodiment, after the projection picture is translated, the coordinate value of the center point of the projection picture is determined and stored, and when the projection picture is input again next time, the coordinate value is taken as the center point of the projection picture to be input again for projection, so that the adjustment is not required to be carried out again every time the picture is input again.
In the embodiment of the invention, when the coordinate value of any point of the initial projection picture exceeds the coordinate value range of the maximum projection area, under the condition of not changing the positions of the fixed lens projector and the curtain, the translation coordinate value is obtained, and the initial projection picture is translated based on the translation coordinate value, so that the projection picture is ensured to be in the maximum projection area and matched with the target projection area, and the aim of saving manpower and material resources is fulfilled.
In an embodiment, with reference to the projection picture adjusting method disclosed in the above embodiment of the present invention, a rectangular coordinate system is established by arbitrarily selecting a point in the maximum projection area as the origin of coordinates, and when the center point coordinate of the initial projection picture is not consistent with the center point coordinate of the target projection area, the position of the initial projection picture is adjusted, and a specific implementation process is shown in fig. 7, and mainly includes:
step S501: and acquiring the video resolution of the initial projection picture.
Step S502: and taking the central point of the maximum projection area of the fixed-lens projector as the central point of the projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
Step S503: and randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system.
In step S503, preferably, as shown in fig. 5, an intersection of the upper left corner of the width and the height of the maximum projection region is selected as a coordinate origin, and a rectangular coordinate system is established with the width of the maximum projection region as an X-axis and the height as a Y-axis.
Step S504: and when the coordinate of the central point of the initial projection picture is inconsistent with the coordinate of the central point of the target projection area, acquiring a translation coordinate value.
In step S504, when the size and the aspect ratio of the initial projection picture are consistent with the target projection area, and the coordinate of the center point of the initial projection picture is inconsistent with the coordinate of the center point of the target projection area, it indicates that the initial projection picture is inconsistent with the target projection area, for example, as shown in fig. 8, the coordinate of the center point of the target projection area is (5,2.5), and the coordinate of the center point of the initial projection picture is (6,3), which indicates that the coordinate of the center point of the initial projection picture is inconsistent with the coordinate of the center point of the target projection area, and a translation coordinate value is obtained to translate the initial projection picture.
Wherein, the target projection area is the projection curtain area.
Step S505: the initial projection screen is translated laterally and/or longitudinally based on the translation coordinate values.
In step S505, as shown in fig. 8, the coordinates of the center point of the target projection area are (5,2.5), and the coordinates of the center point of the initial projection screen are (6,3), so that the coordinates of the two points are consistent, that is, the initial projection screen is matched with the target projection area, the translational abscissa value of the initial projection screen is-1, and the translational ordinate value is-0.5, and the initial projection screen is translated based on the translational abscissa value and the translational ordinate value, so that the projection screen is within the maximum projection area, and the coordinates of the center point is consistent with the coordinates of the center point of the target projection area, that is, the initial projection screen is matched with the target projection area.
In one embodiment, after the projection picture is translated, the coordinate value of the center point of the projection picture is determined and stored, and when the projection picture is input again next time, the coordinate value is used as the center point of the input projection picture for projection, so that the adjustment is not required to be carried out again every time the picture is input again.
In the embodiment of the invention, when the coordinate of the central point of the initial projection picture is inconsistent with the coordinate of the central point of the maximum projection area, under the condition of not changing the positions of the fixed lens projector and the curtain, the translation coordinate value is obtained, and the initial projection picture is translated based on the translation coordinate value, so that the projection picture is ensured to be in the maximum projection area, and the coordinate of the central point is consistent with the coordinate of the central point of the target projection area, namely the initial projection picture is consistent with the target projection area, and the aim of saving manpower and material resources is fulfilled.
As shown in fig. 9, which is a structural diagram of a projection image adjusting apparatus according to an embodiment of the present invention, the apparatus includes a first obtaining unit, a projecting unit, a second obtaining unit, and an adjusting unit.
The first acquisition unit is used for acquiring the video resolution of the initial projection picture.
And the projection unit is used for taking the central point of the maximum projection area of the fixed lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain an initial projection picture.
It should be noted that, when the fixed-lens projector initially projects, the projection image is projected to the center of the maximum projection area by default, and the projection image is projected with the resolution of the video itself, and the projection image cannot exceed the maximum projection area and meets the parameter requirements.
And the second acquisition unit is used for acquiring the adjustment parameter when the parameter corresponding to the initial projection picture does not meet the requirement.
The condition that the parameters corresponding to the initial projection picture do not meet the requirements mainly comprises the following steps: when the width of the initial projection picture is larger than the width of the target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value; when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter; and randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when any coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area.
And the adjusting unit is used for adjusting the position and/or size of the projection picture based on the adjusting parameters.
The adjustment parameters comprise an aspect ratio parameter, a zoom value and a translation coordinate value, corresponding adjustment parameter types are obtained according to the condition that the parameters do not meet requirements, corresponding adjustment is carried out on the projection picture, the projection picture is ensured to be in the maximum display area, the parameters meet the requirements, and otherwise, the operation is prompted to cross the border.
For the adjustment process of the initial projection image based on the aspect ratio parameter, the zoom value, and the translation coordinate value, please refer to the above embodiments specifically, and details are not repeated here.
Based on the projection picture adjusting device disclosed by the embodiment of the invention, in the scheme, when the parameter corresponding to the initial projection picture does not meet the requirement, the second obtaining unit obtains the adjustment parameter under the condition of not changing the positions of the fixed lens projector and the curtain, and the adjustment unit adjusts the position and/or the size of the projection picture based on the adjustment parameter, so that the projection picture is ensured to be in the maximum projection area and the parameter meets the requirement, and the aim of saving manpower and material resources is fulfilled.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for adjusting a projection picture is applied to a fixed-lens projector, and comprises the following steps:
acquiring the video resolution of an initial projection picture;
taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain the initial projection picture;
when the parameters corresponding to the initial projection picture do not meet the requirements, obtaining adjustment parameters;
and adjusting the position and/or size of the initial projection picture based on the adjustment parameters, so that the adjusted projection picture is positioned in the maximum projection area and meets the parameter requirements.
2. The method of claim 1, wherein when the parameter corresponding to the initial projection image does not meet the requirement, obtaining an adjustment parameter comprises:
when the width of the initial projection picture is larger than the width of a target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and zooming the initial projection picture based on the zoom value to obtain the adjusted projection picture, enabling the zoomed projection picture to be in the maximum projection area, enabling the width and the height to be respectively equal to the width and the height of the target projection area, enabling the value range of the zoom value to be less than 100%, and enabling the width and the height of the adjusted projection picture to be equal to the product of the width and the height of the projection picture before adjustment and the zoom value.
3. The method of claim 1, wherein when the parameter corresponding to the initial projection image does not meet the requirement, obtaining an adjustment parameter comprises:
when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and adjusting the aspect ratio of the initial projection picture based on the aspect ratio parameter, so that the adjusted projection picture is positioned in the maximum projection area and is consistent with the aspect ratio of the target projection area.
4. The method according to any one of claims 1 to 3, wherein when the parameter corresponding to the initial projection image does not meet the requirement, acquiring an adjustment parameter comprises:
randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area;
correspondingly, the adjusting the position and/or size of the initial projection picture based on the adjustment parameter to make the adjusted projection picture in the maximum projection area and meet the parameter requirement includes:
and transversely translating and/or longitudinally translating the projection picture based on the translation coordinate value and the rectangular coordinate system, so that the translated projection picture is positioned in the maximum projection area and meets the parameter requirement.
5. The method of claim 4, further comprising:
determining and storing coordinates of the central point of the projection picture after the transverse translation and/or the longitudinal translation;
and when the projection picture is re-input, projecting the re-input projection picture based on the central point coordinate.
6. An apparatus for adjusting a projection image, the apparatus comprising:
the first acquisition unit is used for acquiring the video resolution of an initial projection picture;
the projection unit is used for taking the central point of the maximum projection area of the fixed-lens projector as the central point of a projection picture, and executing projection based on the video resolution to obtain the initial projection picture;
the second acquisition unit is used for acquiring an adjustment parameter when the parameter corresponding to the initial projection picture does not meet the requirement;
and the adjusting unit is used for adjusting the position and/or size of the initial projection picture based on the adjusting parameters, and the adjusted projection picture is positioned in the maximum projection area and meets the parameter requirements.
7. The apparatus according to claim 6, wherein the second obtaining unit is specifically configured to: when the width of the initial projection picture is larger than the width of a target projection area, or the height of the initial projection picture is larger than the height of the target projection area, acquiring a zoom value;
correspondingly, the adjusting unit is specifically configured to:
and zooming the initial projection picture based on the zoom value to obtain the adjusted projection picture, enabling the zoomed projection picture to be in the maximum projection area, enabling the width and the height to be respectively equal to the width and the height of the target projection area, enabling the value range of the zoom value to be less than 100%, and enabling the width and the height of the adjusted projection picture to be equal to the product of the width and the height of the projection picture before adjustment and the zoom value.
8. The apparatus according to claim 6, wherein the second obtaining unit is specifically configured to: when the aspect ratio of the initial projection picture is inconsistent with the aspect ratio of the target projection area, acquiring an aspect ratio parameter;
correspondingly, the adjusting unit is specifically configured to:
and adjusting the aspect ratio of the initial projection picture based on the aspect ratio parameter, so that the adjusted projection picture is positioned in the maximum projection area and is consistent with the aspect ratio of the target projection area.
9. The apparatus according to any one of claims 6 to 8, wherein the second obtaining unit is specifically configured to: randomly selecting a point in the maximum projection area as a coordinate origin to establish a rectangular coordinate system, and acquiring a translation coordinate value when the coordinate value of the initial projection picture is inconsistent with the coordinate value of the target projection area;
correspondingly, the adjusting unit is specifically configured to: and transversely translating and/or longitudinally translating the projection picture based on the translation coordinate value and the rectangular coordinate system, so that the translated projection picture is positioned in the maximum projection area and meets the parameter requirement.
10. The apparatus of claim 9, wherein the projection unit is further configured to:
determining and storing the coordinates of the central point of the projection picture after the transverse translation and/or the longitudinal translation; and when the projection picture is re-input, projecting the re-input projection picture based on the central point coordinate.
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