CN101308572B - Luminous effect processing method and apparatus - Google Patents
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Abstract
The invention discloses a light-emitting special effect processing method and a device; the method comprises the following steps: determining the pixel points which need to emit light in a pending image; respectively taking each pixel point as the central point, and respectively selecting pixel points of corresponding number from each set direction based on a set light-emitting length; taking each selected pixel point and each pixel point which is regarded as the central point as pending pixel points, and calculating the brightness coefficient value of each pending pixel point according to the location relationship between each pending pixel point and the corresponding central point; for each pixel point whose brightness coefficient value is not 1, processing light-emitting treatment to the pixel point based on the brightness coefficient value of the pixel point so as to obtain an image with light-emitting special effect. The technical proposal provided by the invention can achieve specific light-emitting effects in finished shot images.
Description
Technical field
The present invention relates to image processing techniques, relate in particular to a kind of luminous effect processing method and device.
Background technology
Along with the demand of people to the various special efficacys of image, a lot of image processing methods are arranged at present, as image mosaic, image mosaic processing, picture contrast adjusting etc.In addition, in order to make special light efficiency, in the prior art, usually when taking by installing special camera lens additional, wait as rice word mirror or stauroscope to reach the specific illumination effect of captured image.In the practical application, also need to realize the similar above-mentioned meter luminous effect that word mirror or stauroscope are reached for taking the image of finishing sometimes, but still can't realize in the prior art.
Summary of the invention
In view of this, provide a kind of disposal route of luminous effect among the present invention on the one hand, a kind for the treatment of apparatus of luminous effect is provided on the other hand, so that in taking the image of finishing, realize specific illumination effect.
The disposal route of luminous effect provided by the present invention comprises:
A, from pending image, determine to need luminous pixel;
B, be central point with determined each pixel respectively, choose the pixel of corresponding number according to the length of illumination of setting along each direction of setting respectively;
C, with each selected pixel and as the pixel of central point as pending pixel, according to the position relation between each pending pixel and the corresponding central point, the luminance factor value of described each the pending pixel of principle calculating big more according to the near more brightness of decentering point, that the brightness far away more of decentering point is low more;
D, be not each pixel of 1, described pixel carried out luminous processing, obtain having the image of luminous effect according to the luminance factor value of described pixel to the luminance factor value;
Described luminous processing comprises:
Calculate the new brightness value of described pixel according to the former brightness value of the luminance factor value of described pixel and described pixel;
And/or, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
Preferably, before the step C, further comprise:
For each pixel in the pending image is provided with initial value is 1 luminance factor value;
After the step C, before the step D, further comprise: utilize the luminance factor value of described calculating to upgrade the luminance factor value of described pixel;
Obtain described in the step D having before the image of luminous effect, further comprise: to the luminance factor value is each pixel of 1, calculates the new brightness value of described pixel according to the former brightness value of coefficient of setting and described pixel.
Preferably, each direction of described setting comprises: upper and lower, left and right, upper left, bottom right, lower-left, upper right rice word direction;
Perhaps comprise: upper and lower, left and right, or upper left, bottom right, lower-left, upper right cross direction.
Preferably, needing luminous pixel described in the steps A is the pixel of brightness value greater than setting threshold.
Preferably, according to the position relation between pixel and the corresponding central point, the luminance factor value of calculating described pixel is described in the step C:
According to formula
The luminance factor value of calculating pixel point, wherein, the pixel number of N on each direction, choosing; I is for being the pixel sequence number of starting point on each direction with the central point, i ∈ [0, N], and for central point, i is 0; Lcoe (i) is the luminance factor value of i pixel; The brighten coefficient of C for setting, for greater than 1 real number, luminosity is high more, and value is big more;
Wherein, if there are not a plurality of luminance factor values of isocenter of correspondence in described i pixel, then with the luminance factor value of value maximum luminance factor value as described pixel.
Preferably, the new brightness value that calculates described pixel according to the former brightness value of the luminance factor value of pixel and described pixel described in the step D is: according to the new brightness value of formula Ln (i)=Lo (i) * Lcoe (i) calculating pixel point, wherein, Ln (i) is the new brightness value of i pixel, and Lo (i) is the old brightness value of i pixel.
Preferably, utilize the luminance factor value of pixel to calculate the cie system of color representation cie numerical value of described pixel described in the step D, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, the new color value that calculates described pixel is:
According to formula
The new color value of calculating pixel point, Cn (i)=Co (i) * (1-Ccoe (i))+LC * Ccoe (i), wherein, Ccoe (i) is the cie system of color representation cie numerical value of i pixel, Cn (i) is the new color value of i pixel, and Co (i) is the native color value of i pixel, and LC is a glow color.
The treating apparatus of luminous effect provided by the present invention comprises:
Luminance pixel point determination module is used for determining the luminous pixel of needs from pending image;
Area pixel clicks the delivery piece, and being used for is central point with determined each pixel respectively, chooses the pixel of corresponding number respectively along each direction of setting according to the length of illumination of setting;
Luminance factor value computing module, be used for each selected pixel and as the pixel of central point as pending pixel, according to the position relation between each pending pixel and the corresponding central point,, decentering point more far away brightness more low principle big more according to the near more brightness of decentering point calculated the luminance factor value of each pending pixel;
Luminous processing module, being used for the luminance factor value is not each pixel of 1, according to the luminance factor value of described pixel described pixel is carried out luminous processing, obtains having the image of luminous effect;
Described luminous processing module comprises:
The brightness processed submodule, being used for the luminance factor value is not each pixel of 1, calculates the new brightness value of described pixel according to the former brightness value of the luminance factor value of described pixel and described pixel;
And/or, the colourity processing sub, being used for the luminance factor value is not each pixel of 1, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
Preferably, this device further comprises: luminance factor value initialization module, and being used to each pixel in the pending image that initial value is set is 1 luminance factor value;
Described luminance factor value computing module further utilizes the luminance factor value of described calculating to upgrade the luminance factor value of described pixel;
Brightness processed submodule in the described luminous processing module further is each pixel of 1 to the luminance factor value, calculates the new brightness value of described pixel according to the former brightness value of coefficient value of setting and described pixel.
From such scheme as can be seen, need from pending image, to determine luminous pixel among the present invention, be central point with determined each pixel respectively, according to the length of illumination of setting each direction along setting, choose the pixel of corresponding number respectively as rice word direction or cross direction etc., afterwards,, decentering point more far away brightness more low principle big more according to the near more brightness of decentering point, calculate the luminance factor value of each pixel, at last, luminance factor value according to pixel is carried out luminous processing, thereby obtains having the image of luminous effect.
Description of drawings
Fig. 1 is the exemplary process diagram of luminous effect processing method in the embodiment of the invention;
Fig. 2 is the local pixel distribution schematic diagram of pending image in the embodiment of the invention;
The cross-reference design sketch of Fig. 3 a and Fig. 3 b image when using luminous effect processing method in the embodiment of the invention;
Fig. 4 is the exemplary block diagram of luminous effect treating apparatus in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Fig. 1 is the exemplary process diagram of luminous effect processing method in the embodiment of the invention.As shown in Figure 1, this flow process comprises the steps:
Step 101 scans each pixel in the pending image, need therefrom to determine luminous pixel.
In this step, can determine that brightness value is to need luminous pixel greater than the pixel of setting threshold.For example, the span of this setting threshold can be [120,255], and threshold value desirable 240 in the present embodiment.
Step 102 to determined each pixel, is a central point with this pixel, chooses the pixel of corresponding number respectively along each direction of setting according to the length of illumination of setting.
In this step, each direction of setting can comprise upper and lower, left and right, upper left, bottom right, lower-left, upper right rice word direction, or comprise upper and lower, left and right, or upper left, bottom right, lower-left, upper right cross direction, the all directions that perhaps also can comprise other shape are as an X word direction or a word direction etc.
In addition, the span of preseting length can be the length of [1,255] individual pixel, and preseting length can be the length of 80 pixels in the present embodiment, and is then corresponding, can choose 80 pixels respectively on each direction of setting.
Step 103, with each selected pixel and as the pixel of central point as pending pixel,, decentering point more far away brightness more low principle big more according to the near more brightness of decentering point calculated the luminance factor value of each pending pixel.
In this step,, decentering point more far away brightness more low principle big more, the luminance factor value of calculating pixel point according to the near more brightness of decentering point.During specific implementation, can calculate the luminance factor value of this pixel according to the position relation between each pixel and the corresponding central point.
For example, if the pixel number of N on each direction, choosing, as 80; I is for being the pixel sequence number of starting point on each direction with the central point, i ∈ [0, N], and for central point, i is 0; Lcoe (i) is the luminance factor value of i pixel; The brighten coefficient of C for setting, for greater than 1 real number, luminosity is high more, and value is big more, as desirable 1.2 etc.For i pixel, following formula (1) is arranged:
Sometimes, there are corresponding not a plurality of luminance factor values of isocenter in i pixel, and as shown in Figure 2, Fig. 2 is 8 * 8 a local pixel distribution schematic diagram of the pending image in the embodiment of the invention.Among this figure, suppose that pixel A and pixel B are the luminous pixel of determining in the step 101 of needs, and preseting length is the length of 2 pixels, direction initialization is the rice word direction, then can obtain as shown in Figure 2 respectively with A, B is two rice word light-emitting zones at center, wherein, pixel 1,2,3,4 pixels of both having chosen for corresponding central point A, the pixel of choosing for corresponding central point B again, therefore, according to formula (1) when calculating, corresponding these four pixels can obtain two Lcoe (i) respectively, wherein, because the number of pixels of pixel 2 and 3 difference distance A and B is equal, so pixel 2 equates respectively with 3 two Lcoe (i), and the number of pixels of pixel 1 and 4 difference distance A and B does not wait, therefore pixel 1 and 4 two Lcoe (i) do not wait respectively, in this case, can choose the luminance factor value of the luminance factor value of value maximum as corresponding pixel points.
Step 104 is not each pixel of 1 to the luminance factor value, according to the luminance factor value of described pixel described pixel is carried out luminous processing, obtains having the image of luminous effect.
During specific implementation, described luminance factor value according to pixel is carried out luminous processing to described pixel and can be comprised: carry out the luminous processing of brightness and/or colourity, as: according to as described in pixel the luminance factor value and as described in the former brightness value of pixel calculate as described in the new brightness value of pixel; And/or, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
For example, suppose that Ln (i) is the new brightness value of i pixel, Lo (i) is the old brightness value of i pixel, and following formula (2) is then arranged:
Ln(i)＝Lo(i)×Lcoe(i) (2)
Suppose that Ccoe (i) is the cie system of color representation cie numerical value of i pixel, Cn (i) is the new color value of i pixel, and Co (i) is the native color value of i pixel, and LC is a glow color, and following formula (3) and (4) are then arranged:
Cn(i)＝Co(i)×(1-Ccoe(i))+LC×Ccoe(i) (4)
With the YUV graphics standard is example, and two chrominance channels of corresponding U, V can utilize formula (4) to calculate respectively, as the formula (5):
Cn(i)
u＝Co(i)
u×(1-Ccoe(i))+LC
u×Ccoe(i)
(5)
Cn(i)
v＝Co(i)
v×(1-Ccoe(i))+LC
v×Ccoe(i)
Suppose glow color for blue, and LC
uValue 255, LC
vValue 100, then shown in Fig. 3 a and Fig. 3 b, the cross-reference design sketch of Fig. 3 a and Fig. 3 b image when using luminous effect processing method in the embodiment of the invention.Wherein, Fig. 3 a is the original image before handling, and by image shown in Fig. 3 a being carried out can obtain after the above-mentioned processing image with luminous effect shown in Fig. 3 b, as seen, the current among Fig. 3 b and the position of stone have tangible illumination effect.
In the foregoing description, further, can also be before step 101, or between step 101 and the step 102, or between step 102 and the step 103, promptly be referred to as before the step 103, be 1 luminance factor value for each pixel in the pending image is provided with initial value.Then between step 103 and the step 104, can further utilize the luminance factor value of described calculating to upgrade the luminance factor value of described pixel.Correspondingly, before obtaining having the image of luminous effect, can further comprise in the step 104: to the luminance factor value is each pixel of 1, calculates the new brightness value of described pixel according to the former brightness value of coefficient of setting and described pixel.
Wherein, the coefficient of setting can be the deepening coefficient, and span can be [0.1,1], and as desirable 0.6 in the present embodiment, can utilize former brightness value to multiply by this deepening coefficient this moment, so that these pixel deepenings, strengthens the effect of luminous processing; Perhaps, the coefficient of setting also can be another coefficient that brightens, and also can utilize former brightness value to multiply by this coefficient that brightens this moment, so that these pixels brighten a bit a little, makes entire image be in luminance.
More than the disposal route of luminous effect in the embodiment of the invention is described in detail, again the treating apparatus of luminous effect in the embodiment of the invention is described in detail below.
Fig. 4 is the exemplary block diagram of luminous effect treating apparatus in the embodiment of the invention.As shown in Figure 4, this device comprises: luminance pixel point determination module, area pixel click delivery piece, luminance factor value computing module and luminous processing module.
Wherein, luminance pixel point determination module is used for determining the luminous pixel of needs from pending image.Consistent with method shown in Figure 1, the luminance pixel point determination module in the present embodiment can determine that brightness value is to need luminous pixel greater than the pixel of setting threshold.
Area pixel clicks the delivery piece and is used for determined each pixel, is central point with this pixel, chooses the pixel of corresponding number respectively along each direction of setting according to the length of illumination of setting.Consistent with method shown in Figure 1, each direction of setting in the present embodiment can comprise upper and lower, left and right, upper left, bottom right, lower-left, upper right rice word direction, or comprise upper and lower, left and right or upper left, bottom right, lower-left, upper right cross direction, the all directions that perhaps also can comprise other shape are as an X word direction or a word direction etc.The span of preseting length can be the length of [1,255] individual pixel.
Luminance factor value computing module is used for to each selected pixel with as the pixel of central point, according to the position relation between this pixel and the corresponding central point, calculates the luminance factor value of described pixel.Be about to each selected pixel and as the pixel of central point as pending pixel, according to the position relation between each pending pixel and the corresponding central point, calculate the luminance factor value of each pending pixel.Consistent with method shown in Figure 1, during specific implementation, the luminance factor value computing module in the present embodiment can calculate the luminance factor value of this pixel according to the position relation between each pixel and the corresponding central point.Concrete computation process can be consistent with the description in the method shown in Figure 1.
It is not each pixel of 1 that luminous processing module is used for the luminance factor value, according to the luminance factor value of described pixel described pixel is carried out luminous processing, obtains having the image of luminous effect.Consistent with method shown in Figure 1, during specific implementation, the luminous processing module in the present embodiment can comprise: brightness processed submodule and/or colourity processing sub.
Wherein, it is not each pixel of 1 that the brightness processed submodule is used for the luminance factor value, calculates the new brightness value of described pixel according to the former brightness value of the luminance factor value of described pixel and described pixel.
It is not each pixel of 1 that the colourity processing sub is used for the luminance factor value, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
Wherein, the specific operation process of brightness processed submodule and colourity processing sub can be consistent with the corresponding operating described in the flow process shown in Figure 1.
Further, this device also can comprise: luminance factor value initialization module, being used to each pixel in the pending image that initial value is set is 1 luminance factor value.Correspondingly, described luminance factor value computing module further utilizes the luminance factor value of described calculating to upgrade the luminance factor value of described pixel.Brightness processed submodule in the described luminous processing module further is each pixel of 1 to the luminance factor value, calculates the new brightness value of described pixel according to the former brightness value of coefficient value of setting and described pixel.
Wherein, the coefficient of setting can be the deepening coefficient, and span can be [0.1,1], and can utilize former brightness value to multiply by this deepening coefficient this moment, so that these pixel deepenings, strengthens the effect of luminous processing; Perhaps, the coefficient of setting also can be another coefficient that brightens, and also can utilize former brightness value to multiply by this coefficient that brightens this moment, so that these pixels brighten a bit a little, makes entire image be in luminance.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is preferred embodiment of the present invention; be not to be used to limit protection scope of the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the disposal route of a luminous effect is characterized in that, this method comprises:
A, from pending image, determine to need luminous pixel;
B, be central point with determined each pixel respectively, choose the pixel of corresponding number according to the length of illumination of setting along each direction of setting respectively;
C, with each selected pixel and as the pixel of central point as pending pixel, according to the position relation between each pending pixel and the corresponding central point, the luminance factor value of described each the pending pixel of principle calculating big more according to the near more brightness of decentering point, that the brightness far away more of decentering point is low more;
D, be not each pixel of 1, described pixel carried out luminous processing, obtain having the image of luminous effect according to the luminance factor value of described pixel to the luminance factor value;
Described luminous processing comprises:
Calculate the new brightness value of described pixel according to the former brightness value of the luminance factor value of described pixel and described pixel;
And/or, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
2. the method for claim 1 is characterized in that, before the step C, further comprises:
For each pixel in the pending image is provided with initial value is 1 luminance factor value;
After the step C, before the step D, further comprise: utilize the luminance factor value of described calculating to upgrade the luminance factor value of described pixel;
Obtain described in the step D having before the image of luminous effect, further comprise: to the luminance factor value is each pixel of 1, calculates the new brightness value of described pixel according to the former brightness value of coefficient of setting and described pixel.
3. as each described method in the claim 1 to 2, it is characterized in that each direction of described setting comprises: upper and lower, left and right, upper left, bottom right, lower-left, upper right rice word direction;
Perhaps comprise: upper and lower, left and right, or upper left, bottom right, lower-left, upper right cross direction.
4. as each described method in the claim 1 to 2, it is characterized in that needing luminous pixel described in the steps A is the pixel of brightness value greater than setting threshold.
5. method as claimed in claim 1 or 2 is characterized in that, according to the position relation between pixel and the corresponding central point, the luminance factor value of calculating described pixel is described in the step C:
According to formula
The luminance factor value of calculating pixel point, wherein, the pixel number of N on each direction, choosing; I is for being the pixel sequence number of starting point on each direction with the central point, i ∈ [0, N], and for central point, i is 0; Lcoe (i) is the luminance factor value of i pixel; The brighten coefficient of C for setting, for greater than 1 real number, luminosity is high more, and value is big more;
Wherein, if there are not a plurality of luminance factor values of isocenter of correspondence in described i pixel, then with the luminance factor value of value maximum luminance factor value as described pixel.
6. method as claimed in claim 5, it is characterized in that, the new brightness value that calculates described pixel according to the former brightness value of the luminance factor value of pixel and described pixel described in the step D is: according to the new brightness value of formula Ln (i)=Lo (i) * Lcoe (i) calculating pixel point, wherein, Ln (i) is the new brightness value of i pixel, and Lo (i) is the old brightness value of i pixel.
7. method as claimed in claim 5, it is characterized in that, utilize the luminance factor value of pixel to calculate the cie system of color representation cie numerical value of described pixel described in the step D, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, the new color value that calculates described pixel is:
According to formula
The new color value of calculating pixel point, Cn (i)=Co (i) * (1-Ccoe (i))+LC * Ccoe (i), wherein, Ccoe (i) is the cie system of color representation cie numerical value of i pixel, Cn (i) is the new color value of i pixel, and Co (i) is the native color value of i pixel, and LC is a glow color.
8. the treating apparatus of a luminous effect is characterized in that, this device comprises:
Luminance pixel point determination module is used for determining the luminous pixel of needs from pending image;
Area pixel clicks the delivery piece, and being used for is central point with determined each pixel respectively, chooses the pixel of corresponding number respectively along each direction of setting according to the length of illumination of setting;
Luminance factor value computing module, be used for each selected pixel and as the pixel of central point as pending pixel, according to the position relation between each pending pixel and the corresponding central point,, decentering point more far away brightness more low principle big more according to the near more brightness of decentering point calculated the luminance factor value of each pending pixel;
Luminous processing module, being used for the luminance factor value is not each pixel of 1, according to the luminance factor value of described pixel described pixel is carried out luminous processing, obtains having the image of luminous effect;
Described luminous processing module comprises:
The brightness processed submodule, being used for the luminance factor value is not each pixel of 1, calculates the new brightness value of described pixel according to the former brightness value of the luminance factor value of described pixel and described pixel;
And/or, the colourity processing sub, being used for the luminance factor value is not each pixel of 1, utilize the luminance factor value of described pixel to calculate the cie system of color representation cie numerical value of described pixel, according to the native color value and the glow color of the cie system of color representation cie numerical value of described pixel, described pixel, calculate the new color value of described pixel.
9. device as claimed in claim 8 is characterized in that, this device further comprises: luminance factor value initialization module, and being used to each pixel in the pending image that initial value is set is 1 luminance factor value;
Described luminance factor value computing module further utilizes the luminance factor value of described calculating to upgrade the luminance factor value of described pixel;
Brightness processed submodule in the described luminous processing module further is each pixel of 1 to the luminance factor value, calculates the new brightness value of described pixel according to the former brightness value of coefficient value of setting and described pixel.
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| CN104123699A (en) * | 2013-04-26 | 2014-10-29 | 富士通株式会社 | Method of reducing image noise and device |
| CN105335591A (en) * | 2014-06-20 | 2016-02-17 | 北京奇虎科技有限公司 | Method and apparatus for providing background image of software |
| CN108419028B (en) * | 2018-03-20 | 2020-07-17 | Oppo广东移动通信有限公司 | Image processing method, image processing device, computer-readable storage medium and electronic equipment |
| CN108537155B (en) * | 2018-03-29 | 2021-01-26 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and computer readable storage medium |
| CN108616700B (en) * | 2018-05-21 | 2020-11-17 | Oppo广东移动通信有限公司 | Image processing method and device, electronic equipment and computer readable storage medium |
| CN108717530B (en) * | 2018-05-21 | 2021-06-25 | Oppo广东移动通信有限公司 | Image processing method, image processing device, computer-readable storage medium and electronic equipment |
| CN108846807B (en) * | 2018-05-23 | 2021-03-02 | Oppo广东移动通信有限公司 | Light effect processing method and device, terminal and computer-readable storage medium |
| CN108810406B (en) * | 2018-05-23 | 2021-03-02 | Oppo广东移动通信有限公司 | Portrait light effect processing method, device, terminal and computer readable storage medium |
| CN109242794B (en) * | 2018-08-29 | 2021-05-11 | Oppo广东移动通信有限公司 | Image processing method, image processing device, electronic equipment and computer readable storage medium |
| CN109040598B (en) * | 2018-08-29 | 2020-08-14 | Oppo广东移动通信有限公司 | Image processing method, image processing device, computer-readable storage medium and electronic equipment |
| CN114820877A (en) * | 2021-01-28 | 2022-07-29 | 北京字跳网络技术有限公司 | Method, device and equipment for processing luminous effect of characters and storage medium |
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| CN101308572A (en) | 2008-11-19 |
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