CN105847774B - Projecting apparatus output mode switching method and system - Google Patents
Projecting apparatus output mode switching method and system Download PDFInfo
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- CN105847774B CN105847774B CN201610291668.5A CN201610291668A CN105847774B CN 105847774 B CN105847774 B CN 105847774B CN 201610291668 A CN201610291668 A CN 201610291668A CN 105847774 B CN105847774 B CN 105847774B
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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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
-
- 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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
-
- 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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/312—Driving therefor
-
- 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]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
Abstract
The invention discloses a kind of projecting apparatus output mode switching methods and system, method to include：Camera shoots view field, and the first image that shooting obtains is divided into N number of region, is counted respectively to the brightness value in N number of region, determines whether view field has ambient light and ambient light type according to brightness value；In projector template picture to currently used curtain, the second image is obtained after camera shooting view field on projecting apparatus and is stored, the first accumulative brightness of left-half in the second image and the second accumulative brightness of right half part in the second image are obtained, curtain type is determined according to the first accumulative brightness and the second accumulative brightness；According to the presence or absence of the type of currently used curtain and ambient light, corresponding output mode is selected to be exported.The present invention can first identify the curtain type of Current projection, according to the output mode of curtain type adjust automatically projecting apparatus, to there is optimal display effect on curtain whatever.
Description
Technical field
The present invention relates to projection art more particularly to a kind of projecting apparatus output mode switching method and systems.
Background technology
Projecting apparatus is widely used in various occasions, such as business office, education and instruction, home entertaining etc..Meanwhile with skill
The development of art, the projection device as short focus projection also slowly becomes important display amusement equipment, as optical projection system
A part, curtain are often an important component of display system, and the effect of curtain is mainly to ensure that gain is suitable, comparison
It spends, color rendition is good.Curtain is a part and parcel of optical projection system, and curtain has white plastic curtain, grey curtain, glass bead screen, pearl
Curtain, metal curtain, PET acts of environment resistant light paint curtain etc., good curtain, and price is more expensive, in this case, Yong Huke
It can be liked according to the actual environment needs of the installation of oneself, economic conditions etc. select different curtains, or do not have to curtain, directly
It connects and projects on wall.
In this different curtain combination, if projecting apparatus or a kind of constant projection output mode, on curtain
Effect is poor, does not see the content of projection on curtain even sometimes, and inconvenience is brought for user's viewing.
Therefore, the existing technology needs to be improved and developed.
Invention content
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of projecting apparatus output mode switching method and it is
System, it is intended to solve in the prior art in this different curtain combination, if projecting apparatus or a kind of constant projection output
Pattern, effect is poor on curtain, does not see the content of projection on curtain even sometimes, and inconvenience is brought for user's viewing
Defect.
Technical scheme is as follows：
A kind of projecting apparatus output mode switching method, wherein method includes：
A, camera shoots view field, the first image that shooting obtains is divided into N number of region, respectively to N
The brightness value in a region is counted, and determines whether view field has ambient light and the ambient light type, wherein N to be according to brightness value
Natural number；
B, in projector template picture to currently used curtain, after the camera shooting view field on projecting apparatus
Obtain the second image and store, obtain the second image in left-half the first accumulative brightness and the second image in right half part
The second accumulative brightness, curtain type is determined according to the first accumulative brightness and the second accumulative brightness；
C, according to the presence or absence of the type of currently used curtain and ambient light, corresponding output mode is selected to be exported.
The projecting apparatus output mode switching method, wherein further include before the step A：
S, projecting apparatus is projected under dark room conditions in a width template picture to a template curtain, and the camera on projecting apparatus is clapped
Third image is obtained after taking the photograph view field and is stored, and the third for obtaining left-half in third image adds up brightness and third figure
The 4th accumulative brightness of right half part as in.
The projecting apparatus output mode switching method, wherein the step A is specifically included：
The camera installed on A1, projecting apparatus shoots view field, will obtained the first image of shooting on to
Under be divided into N number of horizontal zone, wherein N is natural number；
A2, the brightness value in N number of region is counted respectively, compares the brightness value in N number of region；
If A3, detecting in the brightness value in N number of region, it is predetermined to be more than one for difference between the maximum value and minimum value of brightness value
Threshold value, then view field have ambient light；
If A4, detecting that the brightness value in N number of region is sequentially reduced from up to small, ambient light is from the upper of view field
Side；
If A5, detecting that the brightness value in N number of region is sequentially increased from up to small, ambient light is under view field
Side.
The projecting apparatus output mode switching method, wherein the step A is specifically included：
The camera installed on A11, projecting apparatus shoots view field, by obtained the first image of shooting from a left side to
The right side is divided into M vertical regions, and wherein M is natural number；
A12, the brightness value in M region is counted respectively, compares the brightness value in M region；
If A13, detecting in the brightness value in M region, it is pre- to be more than one for difference between the maximum value and minimum value of brightness value
Determine threshold value, then there is ambient light in view field；
If A14, detecting that the brightness value in M region is sequentially reduced from left to right, a left side of the ambient light from view field
Side；
If A15, detecting that the brightness value in M region is sequentially increased from up to small, the right side of the ambient light from view field
Side.
The projecting apparatus output mode switching method, wherein the step S is specifically included：
S1, projecting apparatus project the picture that a width left-half is certain luminance and right half part is black under dark room conditions
Onto the white plastic curtain cloth with certain gain, obtains third image after the camera shooting view field on projecting apparatus and deposit
Storage；
S2, by the brightness of the red, green, blue of each pixel in left-half in third image it is cumulative after obtain third add up it is bright
Degree；
S3, by the brightness of the red, green, blue of each pixel in right half part in third image it is cumulative after to obtain the 4th accumulative bright
Degree.
The projecting apparatus output mode switching method, wherein the step B is specifically included：
B1, projecting apparatus project the picture that a width left-half is certain luminance and right half part is black in normal use
Onto currently used curtain, obtains the second image after the camera shooting view field on projecting apparatus and store；
B2, by the brightness of the red, green, blue of each pixel in left-half in third image it is cumulative after to obtain first accumulative bright
Degree obtains the second accumulative brightness after the brightness of the red, green, blue of each pixel in right half part in third image adds up；
B3, it does not export when projecting apparatus, there is no ambient light around detection, and the first accumulative brightness adds up brightness with third
When first ratio is more than a predetermined value, then currently used curtain is the curtain of high-gain；
B4, there is no ambient light around detection, calculate the second ratio of the first accumulative brightness and the second accumulative brightness, meter
The third ratio that third adds up brightness and the 4th accumulative brightness is calculated, if the ratio of the second ratio and third ratio is more than a predetermined value
When, then currently used curtain is the curtain of high contrast.
The projecting apparatus output mode switching method, wherein the step C is specifically included：
If C1, currently used curtain are high-gain, the curtain of high contrast, it is judged whether or not ambient light, if having
Ambient light then reduces light-source brightness, and if it is bright to reduce light source without ambient light not less than the first percentage threshold for light-source brightness
It spends to the second percentage threshold；
If C2, currently used curtain are high-gain, the curtain of low contrast, it is judged whether or not ambient light, if having
Ambient light then reduces light-source brightness, and light-source brightness is not less than the first percentage threshold and corrects the gamma values of present image, if
Without ambient light, then light-source brightness is reduced to the second percentage threshold, corrects the gamma values of present image；
If C3, currently used curtain are low gain, the curtain or environment resistant light curtain cloth of high contrast, judge it is current whether
There is ambient light, it is normal to export if there is ambient light, if without ambient light, light-source brightness is reduced to third percentage threshold；
If C4, currently used curtain are low gain, the curtain of low contrast, it is judged whether or not ambient light, if having
Ambient light corrects the gamma values of image, if without ambient light, reduces light-source brightness to third percentage threshold, and correct image
Gamma values.
A kind of projecting apparatus output mode switching system, wherein system includes：
Ambient light type acquisition module, the camera installed on projecting apparatus shoot view field, will shoot
The first obtained image is divided into N number of region, is counted respectively to the brightness value in N number of region, is determined and is projected according to brightness value
It is natural number that whether region, which has ambient light and ambient light type, wherein N,；
Curtain type computing module, for projector template picture to currently used curtain, on projecting apparatus
Obtain the second image after camera shooting view field and store, obtain the first accumulative brightness of left-half in the second image with
And second right half part in image the second accumulative brightness, curtain class is determined according to the first accumulative brightness and the second accumulative brightness
Type；
Output mode handover module is used for according to the presence or absence of the type of currently used curtain and ambient light, to projecting apparatus
Output mode automatically switched.
The projecting apparatus output mode switching system, wherein the system also includes：
Accumulative luminance acquisition module, a width template picture is projected to a template curtain for projecting apparatus under dark room conditions
On, it obtains third image after the camera shooting view field on projecting apparatus and stores, obtain left-half in third image
Third adds up the 4th accumulative brightness of right half part in brightness and third image.
The projecting apparatus output mode switching system, wherein the ambient light type acquisition module specifically includes：
First area division unit, the camera installed on projecting apparatus shoot view field, will shoot
To the first image be divided into N number of horizontal zone from top to bottom, wherein N is natural number；
First brightness statistics unit compares the brightness in N number of region for being counted respectively to the brightness value in N number of region
Value；
First pair of when judging unit, if in brightness value for detecting N number of region, the maximum value and minimum of brightness value
Difference is more than a predetermined threshold between value, then there is ambient light in view field；
First judging unit, if for detecting that the brightness value in N number of region is sequentially reduced from up to small, ambient light comes from
The top of view field；
Second judging unit, if for detecting that the brightness value in N number of region is sequentially increased from up to small, ambient light comes from
The lower section of view field；
Second area division unit, the camera installed on projecting apparatus shoot view field, will shoot
To the first image be from left to right divided into the vertical regions M, wherein M is natural number；
First brightness statistics unit compares the brightness in M region for being counted respectively to the brightness value in M region
Value；
Second pair of when judging unit, if in brightness value for detecting M region, the maximum value and minimum of brightness value
Difference is more than a predetermined threshold between value, then there is ambient light in view field；
Third judging unit, if for detecting that the brightness value in M region is sequentially reduced from left to right, ambient light comes from
The left of view field；
4th judging unit, if for detecting that the brightness value in M region is sequentially increased from up to small, ambient light comes from
The right of view field.
The present invention provides a kind of projecting apparatus output mode switching method and system, the present invention can first identify Current projection
Curtain type, according to the output mode of curtain type adjust automatically projecting apparatus, to have on curtain whatever
Optimal display effect.
Description of the drawings
Fig. 1 is a kind of flow chart of the preferred embodiment of projecting apparatus output mode switching method in the present invention.
Fig. 2 is a kind of shooting image level of the concrete application embodiment of projecting apparatus output mode switching method in the present invention
Area schematic after respectively.
Fig. 3 is that a kind of shooting image water of the concrete application embodiment of projecting apparatus output mode switching method is perpendicular in the present invention
Area schematic after straight point.
Fig. 4 is a kind of flow chart of the preferred embodiment of projecting apparatus output mode switching method in the present invention.
Fig. 5 is a kind of functional schematic block diagram of the preferred embodiment of projecting apparatus output mode switching system of the present invention.
Specific implementation mode
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, below to the present invention further specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention also provides a kind of flow charts of the preferred embodiment of projecting apparatus output mode switching method, such as Fig. 1 institutes
Show, wherein method includes：
Step S100, the camera installed on projecting apparatus shoots view field, the first image that shooting is obtained
It is divided into N number of region, the brightness value in N number of region is counted respectively, determines whether view field has environment according to brightness value
Light and ambient light type, wherein N are natural number.
Specifically, one camera is installed in existing projecting apparatus, for being shot to view field, on the projecting apparatus
Photoinduction sensor there are one also setting up, can incude the ambient light of surrounding.First in the camera of projecting apparatus in the sudden strain of a muscle that do not open
The case where light lamp, view field is shot, the image that shooting obtains is divided into N number of region, respectively to the brightness in N number of region
Value is counted, big according to brightness value in the size of the difference of the maxima and minima of brightness value in N number of region and N number of region
Small arrangement, determines whether view field has ambient light and ambient light type.Wherein N is natural number, and preferential N is more than or equal to 3.
When further implementing, the step S100 is specifically included：
Step S101, the camera installed on projecting apparatus shoots view field, the first image that shooting is obtained
It is divided into N number of horizontal zone from top to bottom, wherein N is natural number；
Step S102, the brightness value in N number of region is counted respectively, compares the brightness value in N number of region；
If in the brightness value for step S103, detecting N number of region, difference is more than between the maximum value and minimum value of brightness value
One predetermined threshold, then view field have ambient light；
If step S104, detecting, the brightness value in N number of region is sequentially reduced from up to small, and ambient light comes from view field
Top；
If step S105, detecting, the brightness value in N number of region is sequentially increased from up to small, and ambient light comes from view field
Lower section.
When it is implemented, being introduced so that N is 5 as an example, as shown in Fig. 2, the camera installed on projecting apparatus is to projected area
Domain is shot, and the first image level that shooting obtains is divided into 5 regions, is denoted as A1, A2, A3, A4, A5 respectively；Respectively
The brightness in the region A1, A2, A3, A4, A5 is counted, brightness is denoted as AV_A1, AV_A2, AV_A3, AV_A4, AV_A5 respectively,
Judge the brightness value in this 5 regions AV_A1, AV_A2, AV_A3, AV_A4, AV_A5；
In the brightness value for detecting this 5 regions AV_A1, AV_A2, AV_A3, AV_A4, AV_A5, the maximum value of brightness value
Difference is more than a predetermined threshold between minimum value, then there is ambient light in view field；Wherein predetermined threshold is preferably 10%；
If detecting AV_A1>AV_A2>AV_A3>AV_A4>AV_A5, then top of the ambient light from view field；
If detecting AV_A1<AV_A2<AV_A3<AV_A4<AV_A5, then lower section of the ambient light from view field.
Further, the step S100 is specifically included：
Step S111, the camera installed on projecting apparatus shoots view field, the first image that shooting is obtained
M vertical regions are from left to right divided into, wherein M is natural number；
Step S112, the brightness value in M region is counted respectively, compares the brightness value in M region；
If in the brightness value for step S113, detecting M region, difference is more than between the maximum value and minimum value of brightness value
One predetermined threshold, then view field have ambient light；
If step S114, detecting, the brightness value in M region is sequentially reduced from left to right, and ambient light comes from view field
Left；
If step S115, detecting, the brightness value in M region is sequentially increased from up to small, and ambient light comes from view field
Right.
When it is implemented, preferential M is selected as 5, as shown in figure 3, the camera installed on projecting apparatus to view field into
The first image that shooting obtains vertically is divided into M region by row shooting, is denoted as B1, B2, B3, B4, B5 respectively, and wherein M is certainly
So number；The brightness in the region B1, B2, B3, B4, B5 is counted respectively, brightness be denoted as respectively BV_B1, BV_B2, BV_B3, B4,
BV_B5 judges the brightness value in this 5 regions BV_B1, BV_B2, BV_B3, BV_B4, BV_B5；
If in the brightness value for detecting this 5 regions BV_B1, BV_B2, BV_B3, BV_B4, BV_B5, the maximum of brightness value
Difference is more than a predetermined threshold between value and minimum value, then there is ambient light in view field；Wherein predetermined threshold is preferably 10%；
If detecting BV_B1>BV_B2>BV_B3>BV_B4>BV_B5, then top of the ambient light from view field；
If detecting BV_B1<BV_B2<BV_B3<BV_B4<BV_B5, then lower section of the ambient light from view field.
Specifically, when obtain ambient light source direction after, can corresponding ambient light blocked, it is better to reach
Drop shadow effect.
In further embodiment, further include before the step S100：
Step S1, projecting apparatus is projected under dark room conditions in a width template picture to a template curtain, taking the photograph on projecting apparatus
Obtain third image after shooting view field as head and store, obtain left-half in third image third add up brightness and
4th accumulative brightness of right half part in third image.
When it is implemented, as shown in figure 4, be the template picture of the present invention, picture is divided into left and right two parts, wherein
Left-half is white, and right half part is black, specifically, the brightness that white portion brightness is 80%.Template curtain is preferably to increase
The white plastic curtain cloth that benefit is 1.Third image is obtained after the camera shooting view field of projecting apparatus and is stored, and is obtained in third image
The third of left-half add up brightness and the 4th accumulative brightness of right half part.Wherein under dark room conditions, no ring is referred specifically to
Border light, and the condition that brightness is 0.
Specifically, step S10 is specifically included：
Step S11, projecting apparatus projects that a width left-half is certain luminance and right half part is black under dark room conditions
Picture to the white plastic curtain cloth with certain gain on, obtain third figure after the camera shooting view field on projecting apparatus
Picture simultaneously stores；
Step S12, third is obtained after the brightness of the red, green, blue of each pixel in left-half in third image adding up
Accumulative brightness；
Step S13, the 4th is obtained after the brightness of the red, green, blue of each pixel in right half part in third image adding up
Accumulative brightness.
When it is implemented, in darkroom, it is white to make a call to a half（80% brightness）, the black figure of half（Figure below）It is 1 to gain
White plastic curtain on, camera the figure fetch come.In the figure that camera obtains, the R component of left side white portion, G components, B
Component intensities, which add up, obtains the accumulative brightness HV_W_STANDARD of third, and the R of the right black portions, G, B brightness is cumulative
Get up to obtain the 4th accumulative brightness HV_B_STANDARD.
Step S200, in projector template picture to currently used curtain, the camera shooting on projecting apparatus is thrown
Obtain the second image behind the domain of shadow zone and store, obtain the second image in left-half the first accumulative brightness and the second image in
Second accumulative brightness of right half part determines curtain type according to the first accumulative brightness and the second accumulative brightness.
When it is implemented, in projector template picture to currently used curtain, according to the side in the step S10
Method shoots view field, and obtains the second tired of the corresponding first accumulative brightness of left-half and right half part in the second image
Meter brightness determines curtain type according to specific calculation formula according to the first accumulative brightness and the second accumulative brightness.
Specifically, the step S200 is specifically included：
Step S201, projecting apparatus projects that a width left-half is certain luminance and right half part is black in normal use
Picture to currently used curtain on, obtain the second image after camera on projecting apparatus shooting view field and store；
Step S202, first is obtained after the brightness of the red, green, blue of each pixel in left-half in third image adding up
Accumulative brightness, the second accumulative brightness is obtained after the brightness of the red, green, blue of each pixel in right half part in third image is added up
；
Step S203, when projecting apparatus does not export, without ambient light around detection, and the first accumulative brightness and third are accumulative
When first ratio of brightness is more than a predetermined value, then currently used curtain is the curtain of high-gain；
Step S204, there is no ambient light around detection, calculate second ratio of the first accumulative brightness with the second accumulative brightness
Value calculates the third ratio that third adds up brightness and the 4th accumulative brightness, if the ratio of the second ratio and third ratio is more than one
When predetermined value, then currently used curtain is the curtain of high contrast.
When it is implemented, in the figure that camera obtains, the R of left side white portion, G, B brightness, which adds up, to be obtained
First accumulative brightness HV_W, the R of the right black portions, G, B brightness, which adds up, obtains the second accumulative brightness HV_B.
When optical inductor is not in the case where projection device has any output, detect around without ambient light, wherein in advance
Definite value is preferably 1.2, then as HV_W/HV_W_STANDARD >When 1.2, it is big to be shown to be the target projection region gain, then when
The preceding curtain used should be the curtain of high-gain.If detecting around without ambient light, and HV_W/HV_W_STANDARD=s <
When 1.2, then currently used curtain is the curtain of low gain.
When there is no ambient light, and meet (HV_W/HV_B)/(HV_W_STANDARD/ HV_B_STAND)s >
When 1.2, show the target projection region high contrast, then currently used curtain is the curtain of high contrast.And working as does not have
When ambient light, meet (HV_W/HV_B)/(HV_W_STANDARD/ HV_B_STAND)=<It is when 1.2, then currently used
Curtain is the curtain of low contrast.
Thus, it can be known that the type of specific curtain is divided into high-gain, the curtain of high contrast, high-gain, low contrast curtain
Cloth, low gain, high contrast curtain, low gain, low contrast curtain.
Step S300, according to the presence or absence of the type of currently used curtain and ambient light, to the output mode of projecting apparatus into
Row automatically switches.
When it is implemented, the type of the currently used curtain determined according to above-mentioned steps, and pass through the installation on projecting apparatus
Optical inductor switches over the output mode of projecting apparatus the perception situation of ambient light.
Further embodiment, the step S300 are specifically included：
If step S301, currently used curtain is high-gain, the curtain of high contrast, it is judged whether or not environment
Light reduces light-source brightness, and if light-source brightness is reduced not less than the first percentage threshold without ambient light if there is ambient light
Light-source brightness is to the second percentage threshold；
If step S302, currently used curtain is high-gain, the curtain of low contrast, it is judged whether or not environment
Light reduces light-source brightness, light-source brightness is not less than the first percentage threshold and corrects present image if there is ambient light
If gamma values reduce light-source brightness to the second percentage threshold, correct the gamma values of present image without ambient light；
If step S303, currently used curtain is low gain, the curtain or environment resistant light curtain cloth of high contrast judge to work as
It is preceding whether to have ambient light, it is normal to export if there is ambient light, if without ambient light, light-source brightness is reduced to third percentage threshold；
If step S304, currently used curtain is low gain, the curtain of low contrast, it is judged whether or not environment
Light corrects the gamma values of image if there is ambient light, if without ambient light, reduces light-source brightness to third percentage threshold, and
Correct the gamma values of image.
When it is implemented, the first percentage threshold is preferably 70%, the first percentage threshold is preferably 50%, the first percentage
Threshold value is preferably 80%.If currently used curtain is high-gain, the curtain of high contrast, it is judged whether or not when ambient light,
If there is ambient light, light-source brightness is slightly reduced, is not less than 70%；If without ambient light, light-source brightness is greatly lowered,
, than milder state, user can be suitble to watch for a long time to 50%.
If currently used curtain is high-gain, the curtain of low contrast, it is judged whether or not when ambient light, if there is ring
Border light slightly reduces light-source brightness, is not less than 70%.Meanwhile the gamma values of image are done certain amendment, combining environmental
The direction of light promotes bright part for the place of environment bright, suppresses dark-part, bright part is promoted for signal source itself, presses
Dark-part processed so that bright is brighter, and dark is darker.If without ambient light, light-source brightness is greatly lowered, can to 50%,
Than milder state, user is suitble to watch for a long time.Meanwhile the gamma values of image are done certain amendment, it is promoted bright
Suppress dark-part in part so that bright is brighter, and dark is darker.
If currently used curtain is low gain, when the curtain or environment resistant light curtain cloth of high contrast, judge it is current whether
It is normal to export if there is ambient light when having ambient light, special processing is not done.If without ambient light, appropriate reduce brightness arrives
80%, in than milder state, user is suitble to watch for a long time.
If currently used curtain is low gain, the curtain of low contrast, it is judged whether or not when ambient light, if there is ring
The gamma values of image, then done certain amendment by border light, and the direction of combining environmental light promotes the place of environment bright
Bright part suppresses dark-part, promotes bright part for signal source itself, suppresses dark-part so that and bright is brighter, and dark is darker,
If without ambient light, appropriate reduce brightness to 80% is suitble to user to watch for a long time than milder state.Image
Gamma values do certain amendment, promote bright part, suppress dark-part so that bright is brighter, and dark is darker.
The present invention also provides a kind of functional schematic block diagrams of the preferred embodiment of projecting apparatus output mode switching system, such as
Shown in Fig. 5, wherein system includes：
Ambient light type acquisition module 100, the camera installed on projecting apparatus shoot view field, will clap
The first image taken the photograph is divided into N number of region, is counted respectively to the brightness value in N number of region, is determined and is thrown according to brightness value
It is natural number that whether shadow zone domain, which has ambient light and ambient light type, wherein N,；Described in specific as above embodiment of the method.
Curtain type computing module 200, for projector template picture to currently used curtain, on projecting apparatus
Camera shooting view field after obtain the second image and store, obtain the first accumulative brightness of left-half in the second image
And second right half part in image the second accumulative brightness, curtain is determined according to the first accumulative brightness and the second accumulative brightness
Type；Described in specific as above embodiment of the method.
Output mode handover module 300 is used for according to the presence or absence of the type of currently used curtain and ambient light, to projection
The output mode of instrument is automatically switched；Described in specific as above embodiment of the method.
Further, the system also includes：
Accumulative luminance acquisition module, a width template picture is projected to a template curtain for projecting apparatus under dark room conditions
On, it obtains third image after the camera shooting view field on projecting apparatus and stores, obtain left-half in third image
Third adds up the 4th accumulative brightness of right half part in brightness and third image；Described in specific as above embodiment of the method.
The ambient light type acquisition module specifically includes：
First area division unit, the camera installed on projecting apparatus shoot view field, will shoot
To the first image be divided into N number of horizontal zone from top to bottom, wherein N is natural number；Described in specific as above embodiment of the method.
First brightness statistics unit compares the brightness in N number of region for being counted respectively to the brightness value in N number of region
Value；Described in specific as above embodiment of the method.
First pair of when judging unit, if in brightness value for detecting N number of region, the maximum value and minimum of brightness value
Difference is more than a predetermined threshold between value, then there is ambient light in view field；Described in specific as above embodiment of the method.
First judging unit, if for detecting that the brightness value in N number of region is sequentially reduced from up to small, ambient light comes from
The top of view field；Described in specific as above embodiment of the method.
Second judging unit, if for detecting that the brightness value in N number of region is sequentially increased from up to small, ambient light comes from
The lower section of view field；Described in specific as above embodiment of the method.
The projecting apparatus output mode switching system, wherein the ambient light type acquisition module specifically includes：
Second area division unit, the camera installed on projecting apparatus shoot view field, will shoot
To the first image be from left to right divided into the vertical regions M, wherein M is natural number；Described in specific as above embodiment of the method.
First brightness statistics unit compares the brightness in M region for being counted respectively to the brightness value in M region
Value；Described in specific as above embodiment of the method.
Second pair of when judging unit, if in brightness value for detecting M region, the maximum value and minimum of brightness value
Difference is more than a predetermined threshold between value, then there is ambient light in view field；Described in specific as above embodiment of the method.
Third judging unit, if for detecting that the brightness value in M region is sequentially reduced from left to right, ambient light comes from
The left of view field；Described in specific as above embodiment of the method.
4th judging unit, if for detecting that the brightness value in M region is sequentially increased from up to small, ambient light comes from
The right of view field；Described in specific as above embodiment of the method.
The projecting apparatus output mode switching system, wherein the accumulative luminance acquisition module specifically includes：
Shooting unit, projects under dark room conditions that a width left-half is certain luminance and right half part is for projecting apparatus
On the picture of black to the white plastic curtain cloth with certain gain, the is obtained after the camera shooting view field on projecting apparatus
Three images simultaneously store；Described in specific as above embodiment of the method.
Third adds up luminance calculation unit, for by left-half in third image the red, green, blue of each pixel it is bright
Third, which is obtained, after degree is cumulative adds up brightness；Described in specific as above embodiment of the method.
4th accumulative luminance calculation unit, for by right half part in third image the red, green, blue of each pixel it is bright
The 4th accumulative brightness is obtained after degree is cumulative；Described in specific as above embodiment of the method.
In conclusion the present invention provides a kind of projecting apparatus output mode switching methods and system, method to include：Camera
View field is shot, obtained the first image of shooting is divided into N number of region, respectively to the brightness value in N number of region into
Row statistics, determines whether view field has ambient light and ambient light type according to brightness value；Projector template picture is to working as
On the preceding curtain used, obtains the second image after the camera shooting view field on projecting apparatus and store, obtain the second image
Second accumulative brightness of right half part in first accumulative brightness of middle left-half and the second image, it is accumulative bright according to first
Degree and the second accumulative brightness determine curtain type；According to the presence or absence of the type of currently used curtain and ambient light, selection corresponds to
Output mode exported.The present invention can first identify the curtain type of Current projection, be thrown according to curtain type adjust automatically
The output mode of shadow instrument, to there is optimal display effect on curtain whatever.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect range.
Claims (8)
1. a kind of projecting apparatus output mode switching method, which is characterized in that method includes：
A, camera shoots view field, the first image that shooting obtains is divided into N number of region, respectively to N number of area
The brightness value in domain is counted, and it is nature to determine whether view field has ambient light and ambient light type, wherein N according to brightness value
Number；
B, it in projector template picture to currently used curtain, is obtained after the camera shooting view field on projecting apparatus
Second image simultaneously stores, and obtains the of the first accumulative brightness of left-half in the second image and right half part in the second image
Two accumulative brightness determine curtain type according to the first accumulative brightness and the second accumulative brightness；
C, according to the presence or absence of the type of currently used curtain and ambient light, corresponding output mode is selected to be exported；
Further include before the step A：
S, projecting apparatus is projected under dark room conditions in a width template picture to a template curtain, and the camera shooting on projecting apparatus is thrown
Third image is obtained behind the domain of shadow zone and is stored, and the third for obtaining left-half in third image adds up in brightness and third image
4th accumulative brightness of right half part；
The step B is specifically included：
B1, it does not export when projecting apparatus, there is no ambient light around detection, and the first accumulative brightness adds up the first of brightness with third
When ratio is more than a predetermined value, then currently used curtain is the curtain of high-gain.
2. projecting apparatus output mode switching method according to claim 1, which is characterized in that the step A is specifically included：
A1, camera shoot view field, and the first image that shooting obtains is divided into N number of horizontal zone from top to bottom
Domain, wherein N are natural number；
A2, the brightness value in N number of region is counted respectively, compares the brightness value in N number of region；
If A3, detecting in the brightness value in N number of region, difference is more than a predetermined threshold between the maximum value and minimum value of brightness value
Value, then there is ambient light in view field；
If A4, detecting that the brightness value in N number of region is sequentially reduced from up to small, top of the ambient light from view field；
If A5, detecting that the brightness value in N number of region is sequentially increased from up to small, lower section of the ambient light from view field.
3. projecting apparatus output mode switching method according to claim 1, which is characterized in that the step A is specifically included：
The camera installed on A11, projecting apparatus shoots view field, and the first image that shooting is obtained is from left to right equal
It is divided into M vertical regions, wherein M is natural number；
A12, the brightness value in M region is counted respectively, compares the brightness value in M region；
If A13, detecting in the brightness value in M region, difference is more than a predetermined threshold between the maximum value and minimum value of brightness value
Value, then there is ambient light in view field；
If A14, detecting that the brightness value in M region is sequentially reduced from left to right, left of the ambient light from view field；
If A15, detecting that the brightness value in M region is sequentially increased from up to small, right of the ambient light from view field.
4. projecting apparatus output mode switching method according to claim 1, which is characterized in that the step S is specifically included：
S1, projecting apparatus project a width left-half is certain luminance and right half part is black picture to one under dark room conditions
On a white plastic curtain cloth with certain gain, obtains third image after the camera shooting view field on projecting apparatus and store；
S2, the accumulative brightness of third is obtained after the brightness of the red, green, blue of each pixel in left-half in third image adds up；
S3, the 4th accumulative brightness is obtained after the brightness of the red, green, blue of each pixel in right half part in third image adds up.
5. projecting apparatus output mode switching method according to claim 4, which is characterized in that the step B is specifically included：
B2, the picture that one width left-half of projector is certain luminance and right half part is black to currently used curtain
On, it obtains the second image after the camera shooting view field on projecting apparatus and stores；
B3, the first accumulative brightness is obtained after the brightness of the red, green, blue of each pixel in left-half in third image adds up,
The second accumulative brightness is obtained after the brightness of the red, green, blue of each pixel in right half part in third image is added up；
B4, there is no ambient light around detection, calculate the second ratio of the first accumulative brightness and the second accumulative brightness, calculating the
The third ratio of three accumulative brightness and the 4th accumulative brightness, if the ratio of the second ratio and third ratio is more than a predetermined value,
Then currently used curtain is the curtain of high contrast.
6. projecting apparatus output mode switching method according to claim 5, which is characterized in that the step C is specifically included：
If C1, currently used curtain are high-gain, the curtain of high contrast, it is judged whether or not ambient light, if there is environment
Light then reduces light-source brightness, and if light-source brightness reduces light-source brightness extremely not less than the first percentage threshold without ambient light
Second percentage threshold；
If C2, currently used curtain are high-gain, the curtain of low contrast, it is judged whether or not ambient light, if there is environment
Light then reduces light-source brightness, and light-source brightness is not less than the first percentage threshold and the gamma values of amendment present image, if acyclic
Border light then reduces light-source brightness to the second percentage threshold, corrects the gamma values of present image；
If C3, currently used curtain are low gain, the curtain or environment resistant light curtain cloth of high contrast, it is judged whether or not ring
Border light, it is normal to export if there is ambient light, if without ambient light, light-source brightness is reduced to third percentage threshold；
If C4, currently used curtain are low gain, the curtain of low contrast, it is judged whether or not ambient light, if there is environment
Light corrects the gamma values of image, if without ambient light, reduces light-source brightness to third percentage threshold, and correct image
Gamma values.
7. a kind of projecting apparatus output mode switching system, which is characterized in that system includes：
Ambient light type acquisition module, the camera installed on projecting apparatus shoot view field, shooting are obtained
The first image be divided into N number of region, the brightness value in N number of region is counted respectively, view field is determined according to brightness value
It is natural number whether to have ambient light and ambient light type, wherein N；
Curtain type computing module, for projector template picture to currently used curtain, the camera shooting on projecting apparatus
It obtains the second image after head shooting view field and stores, obtain in the second image the first accumulative brightness of left-half and the
The second of right half part accumulative brightness in two images determines curtain type according to the first accumulative brightness and the second accumulative brightness；
Output mode handover module is used for according to the presence or absence of the type of currently used curtain and ambient light, to the defeated of projecting apparatus
Go out pattern to be automatically switched；
The system also includes：
Accumulative luminance acquisition module, a width template picture to a template curtain is projected for projecting apparatus under dark room conditions, is thrown
Third image is obtained after camera shooting view field on shadow instrument and is stored, and the third for obtaining left-half in third image is tired
Count the 4th accumulative brightness of right half part in brightness and third image；
The curtain type computing module is additionally operable to：
When projecting apparatus does not export, without ambient light around detection, and the first accumulative brightness adds up the first ratio of brightness with third
When value is more than a predetermined value, judge currently used curtain for the curtain of high-gain.
8. projecting apparatus output mode switching system according to claim 7, which is characterized in that the ambient light type obtains
Module specifically includes：
First area division unit, the camera installed on projecting apparatus shoot view field, and shooting is obtained
First image is divided into N number of horizontal zone from top to bottom, and wherein N is natural number；
First brightness statistics unit compares the brightness value in N number of region for being counted respectively to the brightness value in N number of region；
First pair of when judging unit, if in brightness value for detecting N number of region, the maximum value and minimum value of brightness value it
Between difference be more than a predetermined threshold, then view field have ambient light；
First judging unit, if for detecting that the brightness value in N number of region is sequentially reduced from up to small, ambient light is from projection
The top in region；
Second judging unit, if for detecting that the brightness value in N number of region is sequentially increased from up to small, ambient light is from projection
The lower section in region；
Second area division unit, the camera installed on projecting apparatus shoot view field, and shooting is obtained
First image is from left to right divided into M vertical regions, and wherein M is natural number；
First brightness statistics unit compares the brightness value in M region for being counted respectively to the brightness value in M region；
Second pair of when judging unit, if in brightness value for detecting M region, the maximum value and minimum value of brightness value it
Between difference be more than a predetermined threshold, then view field have ambient light；
Third judging unit, if for detecting that the brightness value in M region is sequentially reduced from left to right, ambient light is from projection
The left in region；
4th judging unit, if for detecting that the brightness value in M region is sequentially increased from up to small, ambient light is from projection
The right in region.
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| CN107247384B (en) * | 2017-07-31 | 2020-07-03 | 歌尔股份有限公司 | Brightness compensation data acquisition system and method, and image brightness adjustment method and device |
| CN108462878B (en) * | 2018-04-09 | 2020-10-09 | 公安海警学院 | Teaching video compression algorithm based on key frame and indicator motion model |
| CN113643673B (en) * | 2021-07-22 | 2022-11-01 | 武汉华星光电技术有限公司 | Ambient light detection method and device and display device |
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| CN1604632A (en) * | 2003-09-29 | 2005-04-06 | 精工爱普生株式会社 | Projector and drive control of light source lamp for projector |
| CN102821285A (en) * | 2012-07-06 | 2012-12-12 | 中影数字巨幕（北京）有限公司 | Digital film playing method and digital film playing system as well as digital film optimizing device |
| CN104318912A (en) * | 2014-10-23 | 2015-01-28 | 赵辉 | Method and device for detecting environmental light brightness |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604632A (en) * | 2003-09-29 | 2005-04-06 | 精工爱普生株式会社 | Projector and drive control of light source lamp for projector |
| CN102821285A (en) * | 2012-07-06 | 2012-12-12 | 中影数字巨幕（北京）有限公司 | Digital film playing method and digital film playing system as well as digital film optimizing device |
| CN104318912A (en) * | 2014-10-23 | 2015-01-28 | 赵辉 | Method and device for detecting environmental light brightness |
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