CN116233617A - Image parameter processing method, device and equipment of shooting equipment and storage medium - Google Patents
Image parameter processing method, device and equipment of shooting equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device, equipment and a storage medium for processing image parameters of shooting equipment. The method comprises the following steps: estimating the instant shooting picture brightness when the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking; according to the instantaneous shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target running mode is estimated; when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image. Through this application scheme, can open the scintillation at the warning lamp and close the scintillation and lead to picture attribute can take place under the circumstances of quick and obvious change in the short time in time adjustment image parameter, guarantee that picture quality is stable rapidly after the warning lamp changes, weaken picture luminance and noise mutation that the warning lamp scintillation brought.
Description
Technical Field
The embodiment of the invention relates to the technical field of image parameter processing of shooting equipment, in particular to an image parameter processing method, an image parameter processing device, an image parameter processing equipment and a storage medium of the shooting equipment.
Background
With the rapid development of the security industry, new cameras are continuously emerging, and warning cameras are relatively popular cameras; the warning type camera generally uses a red-blue lamp or a white lamp as a warning lamp. However, when the warning lamp blinks, the color or brightness of the picture changes rapidly and significantly in a short time, thereby giving a large influence to the image, such as color distortion, abrupt change in brightness of the picture, noise, and the like. Therefore, it becomes important to reduce the sudden change in brightness and noise of the screen due to flickering of the warning lamp, and to improve the image capturing quality.
Disclosure of Invention
The embodiment of the invention provides an image parameter processing method, device, equipment and storage medium of shooting equipment, so that the picture quality is quickly stable after the flickering of a warning lamp changes.
In a first aspect, an embodiment of the present invention provides a method for processing an image parameter of a photographing apparatus, where the method includes:
estimating the brightness of an instantaneous shooting picture after the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
According to the instant shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target running mode is estimated;
when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image.
In a second aspect, an embodiment of the present invention further provides an image parameter processing apparatus of a capturing device, where the apparatus includes:
the first estimating module is used for estimating the brightness of a target shooting picture after the shooting equipment is adjusted to a target running mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
the second estimating module is used for estimating the exposure or gain when the exposure stability is achieved after the shooting equipment is adjusted to the target running mode according to the brightness of the target shooting picture;
and the image parameter configuration module is used for synchronously configuring the image parameters corresponding to the exposure quantity or the gain when the estimated exposure is stable to carry out image shooting when the shooting equipment is detected to operate in the target operation mode.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
One or more processors;
a storage means for storing one or more programs;
the one or more programs are executed by the one or more processors, so that the one or more processors implement the image parameter processing method of the photographing apparatus as provided in any embodiment of the present invention.
In a fourth aspect, there is also provided in an embodiment of the present invention a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the image parameter processing method of a photographing apparatus as provided in any embodiment of the present invention.
The embodiment of the invention provides an image parameter processing method of shooting equipment, which predicts the brightness of a target shooting picture after the shooting equipment is adjusted to a target running mode; according to the brightness of the target shooting picture, the exposure or gain when the shooting equipment reaches exposure stability after being adjusted to a target running mode is further estimated; and simultaneously, when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable so as to shoot the image. Through this scheme, can estimate behind the warning lamp open and the off-state and reach stable exposure or gain value, just so can be in the warning lamp open flicker with close the flicker lead to picture color or luminance can take place under the circumstances of quick and obvious change in the short time, in time adjust image parameter, improve image shooting quality, guarantee behind the warning lamp change picture quality stable rapidly to weaken picture luminance and noise mutation that the warning lamp flicker brought.
The foregoing summary is merely an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more fully understood, and in order that the same or additional objects, features and advantages of the present invention may be more fully understood.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a flowchart of an image parameter processing method of a photographing apparatus provided in an embodiment of the present invention;
fig. 2 is a flowchart of an image parameter processing method of another photographing apparatus provided in an embodiment of the present invention;
fig. 3 is a block diagram of an image parameter processing apparatus of a device provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently, or at the same time. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
In order to better understand the technical solution of the present application, the relevant content of image capturing by controlling the light filling lamp is analyzed in detail herein, so as to better find the defect of controlling the light filling lamp to capture. Wherein, intelligent light filling system of image shooting equipment includes: the system comprises a lens, an image sensor, a DSP, a light measuring module and a light supplementing device, wherein the lens collects an image of a target object and transmits the image to the DSP through the image sensor, the DSP transmits an analysis result to the light measuring module after analyzing and processing input image data, and the light measuring module is further connected with the light supplementing device and supplements light through the light supplementing device. However, during the light filling period, the brightness of the light filling lamp changes, so that the shot image of the lens continuously changes, and the shot image may be blurred, thereby seriously affecting the shooting effect of the shot image.
The following describes in detail the method, apparatus, system, control server and storage medium for handling materials provided in the embodiments of the present invention, through the embodiments and optional technical solutions of the embodiments.
Fig. 1 is a flowchart of an image parameter processing method of a photographing apparatus provided in an embodiment of the present invention. The embodiment of the invention can be applied to the situation of improving the image quality on the basis of the sudden change of the brightness and noise of the picture caused by the flickering of the warning lamp. The method can be executed by an image parameter processing device of the shooting equipment, the device can be realized in a software and/or hardware mode and can be integrated on any image shooting equipment with a network communication function, wherein the image shooting equipment of the embodiment comprises but is not limited to various electronic security equipment, electronic police equipment and the like. As shown in fig. 1, the image parameter processing method of the photographing apparatus provided in the present embodiment includes the steps of:
s110, estimating the brightness of a target shooting picture after the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes an alarm lamp of the photographing apparatus turning on and/or off blinking.
In this embodiment, the photographing apparatus may photograph an image at night by blinking light at night. Such as a warning camera, the photographing apparatus may flash with a warning lamp. The warning lamp multiplexes the light filling lamp of taking on the equipment of shooing certainly, and the light filling lamp includes white light lamp or warm light lamp.
When the shooting equipment is in a target operation mode, the alarm lamp can turn on and/or turn off the flicker. The automatic exposure program can quickly adjust the exposure or gain after detecting the overexposure, but the shooting equipment still can use the parameters in high exposure due to delay. When the warning lamp is turned on and then turned off, the automatic exposure program can quickly adjust the exposure amount or gain after detecting that the picture is too dark, and the camera still uses the image parameters before exposure adjustment, such as low exposure amount, low gain and the like before exposure. Due to the time delay of the camera in the photographing device, the image photographed in the target operation mode is blurred and noise is obvious. Therefore, the scheme of the embodiment needs to estimate the instantaneous shooting picture brightness after the shooting device is adjusted to the target operation mode, so as to estimate the exposure amount or gain when the exposure is stable after the shooting device is adjusted to the target operation mode according to the instantaneous shooting picture brightness.
S120, according to the instant shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target operation mode is estimated.
Specifically, after the instantaneous shot screen brightness is estimated, the exposure or gain when the shot device is adjusted to the target operation mode and then reaches the stable exposure can be estimated according to the estimated instantaneous shot screen brightness. Wherein the target operation mode includes an alarm lamp of the photographing apparatus turning on and/or off blinking. Among them, exposure is a process in which the image sensor senses light. The exposure is affected by three factors, namely:
1) An aperture: the aperture controls the size of the path through which light enters, and the larger the aperture is, the larger the luminous flux per unit time is, and the smaller the aperture is, the smaller the luminous flux per unit time is.
2) Shutter speed: an electronic shutter may be employed in the photographing apparatus, or a conventional mechanical shutter may be employed. The shutter speed and aperture size are complementary and can be entered for adding more light.
3) Gain: the gain in the photographing apparatus may be an amplification gain of the analog signal after double sampling.
Since the noise signal is amplified during the amplification of the image signal, the gain of the amplifier is usually set to be minimum, and the exposure and gain are the data read out from the direct control sensor, and can be adjusted preferentially, and the exposure time can be adjusted mainly. On the premise of no overexposure, increasing the exposure time can increase the signal-to-noise ratio and make the image clear. The imaging quality of the images is different when the shooting equipment has different gains, and the smaller the gain is, the smaller the noise is; the larger the gain, the more noise. In this embodiment, the proper exposure or gain of the photographing apparatus in the target operation mode may enable the photographing apparatus to reach stable exposure and improve the definition of the photographed image, so the solution of this embodiment needs to estimate the exposure or gain when the photographing apparatus reaches stable exposure after being adjusted to the target operation mode.
And S130, synchronously configuring image parameters corresponding to the exposure quantity or gain when the shooting equipment is detected to run in the target running mode, so as to shoot the image.
The image parameters can be determined according to the exposure, i.e. the image parameters cannot be updated and adjusted under the condition of uncertain exposure. After the estimated exposure or gain of the shooting equipment when the exposure is stable after being adjusted to the target operation mode is estimated, the image parameters corresponding to the exposure can be calculated in advance according to the estimated exposure. Wherein the exposure may be determined by the shutter and the gain. When the ambient brightness is low, the speed of the shutter may be slow, and even if the light-compensating lamp is turned on, the shutter does not change, so that the exposure amount can be determined by the gain as long as the gain is determined, thereby determining the image parameter.
When the shooting equipment operates in a target operation mode, the image parameters corresponding to the exposure are synchronously configured to the shooting equipment, so that the image parameters can be timely adjusted under the condition that the color or brightness of a picture can be rapidly and obviously changed in a short time due to the fact that the alarm lamp is turned on and off to flash, the image shooting quality is improved, and the picture quality is ensured to be rapid and stable after the alarm lamp is changed. Meanwhile, the alarm lamp can be normally used for exposure, so that the phenomenon that the brightness of a picture and noise are suddenly changed due to the fact that the exposure is slowed down or the exposure is not directly adjusted is avoided, the image quality during the flickering period of the alarm lamp is ensured, and the normal acquisition of image information can be carried out during the alarming period. In addition, the flicker frequency of the warning lamp is not required to be deliberately adjusted according to the exposure, so that the problems of exposure passivity, low accuracy and the like are avoided as much as possible, and the warning effect of the warning lamp is fully exerted.
According to the image parameter processing method of the shooting equipment, provided by the embodiment of the invention, the instant shooting picture brightness after the shooting equipment is adjusted to the target running mode is estimated; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking; according to the instantaneous shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target running mode is estimated; when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image. Through this scheme, can weaken picture luminance and noise mutation that the warning lamp twinkle brought, open the scintillation and close the scintillation at the warning lamp and lead to picture attribute (picture luminance, color, noise and coding etc.) can take place under the circumstances of quick and obvious change in the short time, in time adjust image parameter to improve image shooting quality.
On the basis of the above embodiment, optionally, according to the instantaneous brightness of the shot image, estimating the exposure or gain when the shot device reaches the stable exposure after being adjusted to the target operation mode may include steps A1-A2:
And A1, determining initial shooting picture brightness before the shooting equipment is adjusted to a target operation mode, initial gain and ideal shooting picture brightness when exposure stability is achieved after the shooting equipment is adjusted to the target operation mode.
Wherein the target operation mode includes an alarm lamp of the photographing apparatus turning on and/or off blinking. Before the warning lamp turns on flickering and/or turns off flickering, the brightness and gain of the current photographed picture are acquired as the initial photographed picture brightness and initial gain. In practical application, after the flickering of the warning lamp is turned on or off for many times, the brightness of the picture is analyzed, so that the ideal brightness of the shot picture can be obtained when the shot equipment reaches the stable exposure after being adjusted to the target operation mode.
And A2, estimating the gain or the exposure quantity when the exposure stability is achieved after the shooting equipment is adjusted to the target operation mode according to the light supplementing intensity, the instant shooting picture brightness, the initial gain and the ideal shooting picture brightness of the warning lamp by using an equivalent exposure principle.
Wherein the image has an ideal brightness at each exposure or gain, and the brightness is the ideal brightness of the photographed picture. Wherein, equivalent exposure means that when the aperture is opened or contracted by several steps, the aperture coefficient is the same as the exposure amount obtained by each combination of the shutter speeds as long as the shutter speed is also increased or decreased by several steps accordingly. Further, according to the above steps, in the case where the light intensity of the warning lamp, the instantaneous photographed picture luminance, the initial gain, and the ideal photographed picture luminance are known, the gain or the exposure amount at which the exposure stability is reached after the photographing apparatus is adjusted to the target operation mode is estimated by the equivalent exposure principle.
The gain or the exposure amount when the exposure stability is reached after the shooting device is adjusted to the target operation mode is estimated by using the equivalent exposure principle by determining the initial shooting picture brightness and the initial gain before the shooting device is adjusted to the target operation mode and the ideal shooting picture brightness when the exposure stability is reached after the shooting device is adjusted to the target operation mode. The accuracy of the exposure quantity and/or the gain when the exposure is estimated to be stable can be improved, so that the quality of a shooting picture is improved.
Fig. 2 is a flowchart of another image parameter processing method of a photographing apparatus according to an embodiment of the present invention, where steps in the foregoing embodiment are further refined on the basis of the foregoing embodiment, and the embodiment of the present invention may be combined with each of alternatives in one or more embodiments. As shown in fig. 2, the image parameter processing method of the photographing apparatus provided in the present embodiment includes the steps of:
s210, determining estimated brightness information of pre-divided picture blocks in a shooting picture of the shooting equipment after the shooting equipment is adjusted to a target operation mode and before exposure adjustment.
Specifically, after the photographing apparatus is adjusted to the target operation mode, since the light compensating lamp has different brightness effects on different positions in the entire screen. Thus, the photographed picture of the photographing apparatus is equally blocked. And a block whose luminance is unchanged before and after the light supplement lamp is turned on is selected as a reference block. Specifically, the entire photographed image may be divided into a×b blocks on average.
On the basis of the above embodiment, optionally, after the photographing apparatus is adjusted to the target operation mode, the pre-estimated brightness information of the pre-divided frame blocks in the photographing frame of the photographing apparatus may include steps B1-B3:
and B1, determining a light supplementing angle and/or a light supplementing distance when light supplementing is carried out on the picture blocks which are pre-divided in the shooting picture after the alarm lamp of the shooting equipment is turned on and blinks.
Specifically, in this embodiment, the photographing device, such as a warning lamp, may be a light supplement lamp, such as a white light lamp or a warm light lamp, of the multiplexing device. White light lamps have different brightness distributions for different angles of different blocks of the photographed picture. By way of example, assuming uniform picture brightness, there is no significant interference of excessively bright or excessively dark blocks. From the energy distribution of the light filling lamp, it can be deduced that the brightness of a block at a large angle from the camera and close to above the live is hardly affected by the light filling lamp, i.e. the brightness of the block is unchanged before and after the light filling lamp is switched on. Further, a block whose luminance is constant before and after the light supplement lamp is turned on is taken as a reference block.
In this embodiment, optionally, in the energy distribution after the alarm lamp is turned on and blinks, the energy generated by the center of the alarm lamp is greater than the energy generated by the edge of the alarm lamp; and in the energy distribution after the alarm lamp is turned on and blinks, the more the position is away from the alarm lamp, the lower the energy of the corresponding position is.
The center energy of the shot picture is strongest, and the farther from the center, the lower the energy, i.e. the closer to the edge, the lower the energy is from the center. Different light filling angles and/or different light filling distances lead to different image blocking energy, so that after the alarm lamp of the shooting equipment is turned on and flashes, the light filling angles and/or the light filling distances of the image blocks pre-divided in the shooting image are required to be determined.
By utilizing the difference of energy distribution of different picture blocks determined by different distances from the warning lamp, the energy of each picture block can be focused, and the light filling angle and/or the light filling distance of the pre-divided picture blocks in the shot picture can be better determined.
And B2, determining an estimated brightness contribution value of the pre-divided picture blocks after the alarm lamp is turned on and blinks and before exposure adjustment according to the light supplementing distance and the light supplementing angle after the alarm lamp is turned on and blinks.
Since the different light compensating angles and/or the different light compensating distances have different light compensating intensities, the brightness of the image blocks is different, and therefore, the contribution degree of the white light lamp switch to the average brightness of each block of the image is different. The brightness may be a change amount of brightness of the photographed picture compared with the original picture after the light supplement lamp is turned on and/or blinks. For example, the brightness of the picture after the light supplementing lamp is turned on is the original brightness and contribution
The degrees add, i.e. the contribution is positive. The brightness of the picture after the light supplementing lamp is turned off is the original picture brightness subtracted from the contribution degree, namely the contribution degree is a negative value. The contribution degree may be determined by the light filling angle and/or the light filling distance.
In this embodiment, optionally, the size of the estimated brightness contribution value is inversely proportional to the size of the light-compensating distance, and the size of the estimated brightness contribution value is directly proportional to the corresponding energy size at the light-compensating angle.
Specifically, the block closest to the light-compensating point has the largest estimated brightness contribution value, and the farther from the light-compensating point, the smaller the estimated brightness contribution value. The smaller the light filling angle is, the closer the block is to the light filling point is, the larger the estimated brightness value is, and the larger the light filling angle is, the smaller the estimated brightness value is.
And calculating the estimated brightness value of each block by utilizing the difference of the light filling angle and the light filling distance of each block, so that the influence of each block on the brightness of the whole picture can be focused, and the accuracy of the estimated brightness information of the pre-divided picture blocks in the shot picture is improved.
For example, assuming that the center of the light filling lamp, i.e., the zero-degree angle energy is the strongest, the screen brightness L can be increased U And the maximum angle of the light supplementing lamp is theta M The maximum light supplementing distance is D M . Then at an angle of theta C And is distant from camera D C The contribution degree of the brightness of the picture is that
Wherein, kappa is the weight of the energy light filling angle and light filling distance attenuation of the light filling lamp of the shooting equipment, and kappa epsilon [0,1].
For example, assuming that the photographing apparatus is a camera with a lens parameter of 200 ten thousand pixel resolution, the camera has a horizontal length of w=1920×p, a vertical height of w=1080×p, and P is a sensor pixel size. The light filling angle of the picture at the block of the a-th column and the b-th row is as follows:
assuming that the picture is symmetrically divided into left and right areas from the center of the camera, the light supplement distance is:
the contribution of the light filling lamp to the average luminance of the block is:
the average brightness of the left and right and lower blocks of the reference block, that is, the current block brightness plus the brightness contributed by the light supplement lamp at the left, right or lower block, is sequentially calculated according to the formula in the above step. By analogy, the brightness of all blocks from the center to the corners of the picture can be calculated.
In practical application, in a relatively bright environment, the contribution degree of turning on and off the light supplement lamp to the brightness of the picture is relatively small. In a darker environment, the contribution degree of the on and off of the light supplementing lamp to the image is larger. Therefore, the brightness contribution value L of the light filling lamp to the picture U It is necessary to update according to the ambient brightness. For example, based on a calibrated method, the photographing apparatus is set to be manually exposed under different ambient illuminance. And respectively collecting the average brightness of the picture when the light supplementing lamp is turned on and off and the average brightness of the area matched with the energy field of the light supplementing lamp, and calculating the brightness contribution value of the light supplementing lamp switch to the picture. Of course, it can be theoretically estimated by the relation with the ambient illuminance, as follows:
wherein L is BAVG Represents the average luminance of the brightest block, L BAVG Either the brightest block or several blocks close to the brightest block. L (L) DAVG Represents the average luminance of the darkest block, L DAVG May be the darkest block, L DAVG Or may be several blocks close to the darkest block. Gain THR Gain threshold value for obviously influencing picture brightness by light supplementing lamp CUR L is the current gain value CUR The average luminance of the current picture. When the ambient brightness is good, the gain is low, the brightness difference between the dark block brightness and the bright block brightness is small, and the calculated light supplementing lamp brightness contribution value is small. When the ambient brightness is lower, the gain is larger, the average brightness of the bright and dark blocks is also obviously different, and the calculated contribution value of the light supplementing lamp is larger. And B3, determining the estimated brightness information of the pre-divided picture blocks in the shooting picture according to the estimated brightness contribution value and the reference brightness information of the pre-divided picture blocks in the shooting picture.
The reference brightness information of the pre-divided picture blocks in the shooting picture is determined based on the brightness of the pre-divided picture blocks in the shooting picture before the shooting equipment is adjusted to the target running mode or the brightness of the pre-divided picture blocks at preset positions in the shooting picture after the shooting equipment is adjusted to the target running mode.
The reference brightness information can be determined by brightness of the pre-divided picture blocks in the shooting picture before the shooting equipment adjusts to the target operation mode. Specifically, before the light supplementing lamp is turned on, the average brightness of each pre-divided picture block of the picture is obtained, and then the average brightness of each pre-divided picture block after the light supplementing lamp is turned on can be obtained by adding the average brightness of the current pre-divided picture block to the brightness contribution value of the current pre-divided picture block. The estimated luminance information of the divided blocks of the pre-divided picture obtained in this way is referred to as 1 st luminance. The brightness of the divided blocks of the pre-divided picture at the preset position in the shooting picture can also be determined after the shooting equipment is adjusted to the target operation mode. The preset position is a position less affected by the light supplement lamp, for example, a corner position farthest from the light supplement lamp. Specifically, after the luminance contribution value of each block is estimated, the estimated luminance information of the pre-divided picture blocks in the photographed picture can be determined according to the estimated luminance contribution value and the reference luminance information of the pre-divided picture blocks in the photographed picture. After the reference brightness is obtained, the average brightness of the divided blocks of the pre-divided picture on the left side, the right side and the lower side of the reference brightness is calculated in sequence according to the light supplementing angle and the light supplementing distance based on the reference brightness, namely the current reference brightness is added with the estimated brightness contribution value at the left side, the right side or the lower side block. By analogy, the brightness of all pre-divided picture segments from the corner (picture segment furthest from the center) to the center of the picture can be calculated. The estimated luminance information of the divided blocks of the pre-divided picture obtained in this way is noted as the 2 nd luminance.
Similarly, when the light-compensating lamp is turned off, when the 1 st brightness is calculated, the brightness block at the center near the image and several blocks around the brightness block are selected, the average brightness is calculated after the brightest block and the darkest block are removed, the brightness is taken as the reference brightness, the brightness of the upper block, the lower block, the left block and the right block is calculated, namely the reference brightness subtracts the contribution brightness of the light-compensating lamp of the corresponding block, and finally the average brightness of the whole picture is calculated.
S220, carrying out brightness weighting on the estimated brightness information of each pre-divided picture block in the shooting picture to obtain the instant shooting picture brightness after the shooting equipment is adjusted to the target operation mode and before exposure adjustment.
And weighting the estimated brightness information of each picture block divided in advance in the shooting picture. Assume that the weights of the picture blocks are W respectively 11 ,W 12 ,…W 1b ,…,W ab . Wherein the weight may be dependent on the user's needs or the needs of the current actual environment. According to the above steps, the average brightness of the shot picture and the average brightness of each block of the shot picture are obtained first. Wherein each block has a luminance value L 11 ,L 12 ,…L 1b ,…,L ab The weights of the blocks of the shooting picture are W respectively when the brightness statistics is carried out 11 ,W 12 ,…W 1b ,…,W ab The instantaneous shot screen brightness after the shooting device is adjusted to the target running mode and before exposure adjustment can be obtained as a weighted average value of each brightness:
Further, the instantaneous shot screen brightness after the shooting device is adjusted to the target operation mode and before exposure adjustment is performed is obtained.
In practical application, the installation environment of shooting equipment is complex, for example, the surrounding trees are more, and various municipal facilities such as street lamps are more. In this case, the brightness around the photographing apparatus does not necessarily have a reference meaning, so some regions may be selectively removed when the overall brightness is calculated. The 1 st luminance and the 2 nd luminance can be compared and a threshold can be set. If the difference value between the 1 st brightness and the 2 nd brightness exceeds the threshold value, the larger value is taken as the subsequent calculation. If the difference value between the 1 st brightness and the 2 nd brightness is in the threshold value range, taking the average value of the 1 st brightness and the 2 nd brightness as the subsequent calculation. And S230, synchronously configuring image parameters corresponding to the exposure quantity or gain when the shooting equipment is detected to run in the target running mode, so as to shoot the image.
For example, according to the above steps, the average brightness of the picture before the light supplement lamp is turned on is known to be L B The shutter is S B Gain of G B Ideal shot picture brightness is L A The shutter is S A The intensity of the light supplementing lamp is E, E max Representing the maximum value of the light supplementing intensity, wherein the estimated average brightness of the picture after the light supplementing lamp is started is L S The gain value G after exposure adjustment can be calculated by the principle of equivalent exposure A ：
At the same time gain G can be obtained A The image parameters at that time are simultaneously arranged at the time when the light-compensating lamp is turned on.
Further, when the shooting equipment is detected to operate in the target operation mode, the image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable are synchronously configured to be used for shooting the image. In this embodiment, the estimated luminance information of the pre-divided frame blocks in the shooting frame of the shooting device after the shooting device is adjusted to the target operation mode and before the exposure adjustment is performed is determined; the method comprises the steps of carrying out brightness weighting on estimated brightness information of each pre-divided picture block in a shooting picture to obtain instant shooting picture brightness after shooting equipment is adjusted to a target operation mode and before exposure adjustment; when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image.
Optionally, the estimated brightness and the predicted gain value calculated by the estimated brightness have a certain error with the actual effective value, so that after the light supplementing lamp flashes and the predicted image parameter is configured, the parameter needs to be updated once according to the actual effective gain value to ensure that the parameter is more accurate.
According to the image parameter processing method of the shooting equipment provided by the embodiment of the invention, through the scheme, the stable exposure or gain value is achieved after the on and off states of the warning lamp are estimated in advance, so that the image parameters can be adjusted in time under the condition that the color or brightness of a picture can be changed rapidly and obviously in a short time due to the on and off flickering of the warning lamp, the image shooting quality is improved, the rapid and stable picture quality after the change of the warning lamp is ensured, and the picture brightness and noise mutation caused by the flickering of the warning lamp are weakened. Meanwhile, the brightness interference condition of each position of the shot picture in the flickering on and off period of the warning lamp can be fully considered, the brightness contribution of the picture blocks corresponding to each position can be accurately estimated, the average brightness of the shot picture can be estimated as accurately as possible, and the subsequent calculation accuracy of the exposure quantity and the gain which can enable the shot equipment to be exposed stably is improved.
Fig. 3 is a block diagram of an image parameter processing apparatus of a photographing device according to an embodiment of the present invention. The embodiment of the invention can be applied to the situation of improving the image quality on the basis of the sudden change of the brightness and noise of the picture caused by the flickering of the warning lamp. The device can be realized in a software and/or hardware mode and can be integrated on any image shooting device with a network communication function, wherein the image shooting device of the embodiment comprises but is not limited to various electronic security devices, electronic police devices and the like. As shown in fig. 3, the image parameter processing apparatus of the photographing device provided in the present embodiment includes: the image parameter configuration module 330 includes a first estimation module 310, a second estimation module 320, and an image parameter configuration module. Wherein:
A first estimating module 310, configured to estimate an instantaneous captured image brightness after the capturing device is adjusted to the target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
a second estimating module 320, configured to estimate, according to the instantaneous captured image brightness, an exposure amount or a gain when the exposure is stable after the capturing device is adjusted to a target operation mode;
the image parameter configuration module 330 is configured to synchronously configure, when it is detected that the photographing apparatus is operating in the target operation mode, an image parameter corresponding to the exposure amount or the gain when the exposure is stable, which is estimated, so as to perform image photographing.
Based on the above embodiment, optionally, the first estimating module 310 includes:
the brightness information estimating unit is used for determining estimated brightness information of the pre-divided picture blocks in the shooting picture of the shooting equipment after the shooting equipment is adjusted to the target operation mode and before exposure adjustment is carried out;
and the instantaneous shooting picture brightness acquisition unit is used for carrying out brightness weighting on the estimated brightness information of each pre-divided picture block in the shooting picture to obtain the instantaneous shooting picture brightness after the shooting equipment is adjusted to the target running mode and before exposure adjustment.
On the basis of the above embodiment, optionally, the luminance information estimating unit includes:
a first determining subunit, configured to determine a light supplementing angle and/or a light supplementing distance of a pre-divided picture block in a shooting picture after a warning lamp of the shooting device is turned on and blinks;
the second determining subunit is used for determining the estimated brightness contribution value of the partition of the pre-divided picture after the alarm lamp is turned on and blinks according to the light supplementing distance and the light supplementing angle after the alarm lamp is turned on and blinks;
and the third determination subunit is used for determining the estimated brightness information of the pre-divided picture blocks in the shooting picture according to the estimated brightness contribution value and the reference brightness information of the pre-divided picture blocks in the shooting picture.
The reference brightness information of the pre-divided picture blocks in the shooting picture is determined based on the brightness of the pre-divided picture blocks in the shooting picture before the shooting equipment is adjusted to the target running mode or the brightness of the pre-divided picture blocks at preset positions in the shooting picture after the shooting equipment is adjusted to the target running mode.
On the basis of the above embodiment, optionally, the first determining subunit includes:
in the energy distribution after the alarm lamp is turned on and blinks, the energy generated by the center of the alarm lamp is larger than the energy generated by the edge of the alarm lamp; and in the energy distribution after the alarm lamp is turned on and blinks, the more the position is away from the alarm lamp, the lower the energy of the corresponding position is.
On the basis of the above embodiment, optionally, the third determining subunit includes:
the estimated brightness contribution value is inversely proportional to the light supplementing distance, and the estimated brightness contribution value is directly proportional to the corresponding energy under the light supplementing angle.
Based on the above embodiment, optionally, the second estimating module 320 includes:
determining initial shooting picture brightness and initial gain before the shooting equipment is adjusted to a target operation mode, and ideal shooting picture brightness when exposure is stable after the shooting equipment is adjusted to the target operation mode;
according to the light supplementing intensity, the instant shooting picture brightness, the initial gain and the ideal shooting picture brightness of the warning lamp, the gain or the exposure quantity when the shooting equipment reaches the exposure stability after being adjusted to the target operation mode is estimated through the equivalent exposure principle.
On the basis of the above embodiment, optionally, the apparatus further includes:
the warning lamp multiplexes the light filling lamp of taking on the equipment of shooing certainly, the light filling lamp includes white light lamp or warm light lamp.
The image parameter processing device of the photographing apparatus provided in the embodiment of the present invention may execute the image parameter processing method of the photographing apparatus provided in any embodiment of the present invention, and has the corresponding functions and beneficial effects of executing the image parameter processing method of the photographing apparatus, and the detailed process refers to the related operations of the image parameter processing method of the photographing apparatus in the foregoing embodiment.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 4, an electronic device provided in an embodiment of the present invention includes: one or more processors 410 and a storage 420; the number of processors 410 in the electronic device may be one or more, one processor 410 being illustrated in fig. 4; the storage 420 is used for storing one or more programs; the one or more programs are executed by the one or more processors 410, so that the one or more processors 410 implement the image parameter processing method of the photographing apparatus according to any one of the embodiments of the present invention.
The electronic device may further include: an input device 430 and an output device 440.
The processor 410, the storage 420, the input 430 and the output 540 of the electronic device may be connected by a bus or other means, for example in fig. 4.
The storage 420 in the electronic device is used as a computer readable storage medium, and may be used to store one or more programs, which may be software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the image parameter processing method of the photographing device provided in the embodiment of the present invention. The processor 410 executes various functional applications of the electronic device and data processing by executing software programs, instructions, and modules stored in the storage 420, that is, implements the image parameter processing method of the photographing device in the above-described method embodiment.
The storage 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the electronic device, etc. In addition, the storage 420 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, the storage 420 may further include memory remotely located with respect to the processor 410, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. The output 440 may include a display device such as a display screen.
And, when one or more programs included in the above-described electronic device are executed by the one or more processors 410, the programs perform the following operations:
Estimating the brightness of an instantaneous shooting picture after the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
according to the instant shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target running mode is estimated;
when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image.
Of course, it will be appreciated by those skilled in the art that when one or more programs included in the electronic device are executed by the one or more processors 410, the programs may also perform relevant operations in the image parameter processing method of the photographing device provided in any embodiment of the present invention.
In an embodiment of the present invention, there is provided a computer-readable medium having stored thereon a computer program for executing an image parameter processing method of a photographing apparatus when executed by a processor, the method including:
estimating the brightness of an instantaneous shooting picture after the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
According to the instant shot picture brightness, the exposure or gain when the shot equipment reaches exposure stability after being adjusted to a target running mode is estimated;
when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image.
Optionally, the program may be further configured to perform the image parameter processing method of the photographing apparatus provided in any of the embodiments of the present invention when executed by the processor.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to: electromagnetic signals, optical signals, or any suitable combination of the preceding. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio frequency (RadioFrequency, RF), and the like, or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A method of processing image parameters of a photographing apparatus, the method comprising:
estimating the instant shooting picture brightness when the shooting equipment is adjusted to a target operation mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
according to the instant shot picture brightness, the exposure or gain when the shooting equipment is adjusted to a target running mode to reach exposure stability is estimated;
when the shooting equipment is detected to run in a target running mode, synchronously configuring image parameters corresponding to the estimated exposure quantity or gain when the exposure is stable, so as to shoot the image.
2. The method of claim 1, wherein predicting the instantaneous photographic screen brightness when the photographic device is adjusted to the target operational mode comprises:
determining pre-estimated brightness information of pre-divided picture blocks in a shooting picture of the shooting equipment after the shooting equipment is adjusted to a target operation mode and before exposure adjustment;
and carrying out brightness weighting on the estimated brightness information of each pre-divided picture block in the shooting picture to obtain the instant shooting picture brightness after the shooting equipment is adjusted to the target operation mode and before exposure adjustment.
3. The method of claim 2, wherein determining the estimated brightness information of the pre-divided frame segments in the photographed frame of the photographing apparatus after the photographing apparatus is adjusted to the target operation mode and before the exposure adjustment is performed, comprises:
after the alarm lamp of the shooting equipment is determined to turn on and flash, the light supplementing angle and/or the light supplementing distance of the pre-divided picture blocks in the shooting picture are/is determined;
determining an estimated brightness contribution value of the pre-divided picture blocks after the alarm lamp is started to flash and before exposure adjustment according to the light supplementing distance and the light supplementing angle after the alarm lamp is started to flash;
determining estimated brightness information of the pre-divided picture blocks in the shooting picture according to the estimated brightness contribution value and the reference brightness information of the pre-divided picture blocks in the shooting picture;
the reference brightness information of the pre-divided picture blocks in the shooting picture is determined based on the brightness of the pre-divided picture blocks in the shooting picture before the shooting equipment is adjusted to the target running mode or the brightness of the pre-divided picture blocks at preset positions in the shooting picture after the shooting equipment is adjusted to the target running mode.
4. A method according to claim 3, wherein in the distribution of energy after the warning lamp is turned on and blinks, the energy generated by the center of the warning lamp is greater than the energy generated by the edges of the warning lamp; and in the energy distribution after the alarm lamp is turned on and blinks, the more the position is away from the alarm lamp, the lower the energy of the corresponding position is.
5. A method as claimed in claim 3, wherein the magnitude of the estimated luminance contribution is inversely proportional to the magnitude of the light filling distance, and the magnitude of the estimated luminance contribution is proportional to the magnitude of the corresponding energy at the light filling angle.
6. The method of claim 1, wherein estimating the exposure or gain at which the exposure is stable after adjusting the photographing apparatus to the target operation mode based on the instantaneous photographed-picture brightness, comprises:
determining initial shooting picture brightness and initial gain before the shooting equipment is adjusted to a target operation mode, and ideal shooting picture brightness when exposure is stable after the shooting equipment is adjusted to the target operation mode;
according to the light supplementing intensity, the instant shooting picture brightness, the initial gain and the ideal shooting picture brightness of the warning lamp, the gain or the exposure quantity when the shooting equipment reaches the exposure stability after being adjusted to the target operation mode is estimated through the equivalent exposure principle.
7. The method of claim 1, wherein the warning light multiplexes a light supplement light on the photographing apparatus, the light supplement light comprising a white light or a warm light.
8. An image parameter processing apparatus of a photographing device, the apparatus comprising:
The first estimating module is used for estimating the instant shooting picture brightness when the shooting equipment is adjusted to the target running mode; wherein the target operation mode includes a warning lamp of the photographing apparatus turning on and/or off blinking;
the second estimating module is used for estimating the exposure or gain when the exposure stability is achieved after the shooting equipment is adjusted to the target operation mode according to the instant shooting picture brightness;
and the image parameter configuration module is used for synchronously configuring the image parameters corresponding to the exposure quantity or the gain when the estimated exposure is stable to carry out image shooting when the shooting equipment is detected to operate in the target operation mode.
9. A photographing apparatus, characterized by comprising:
one or more processors;
a storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the image parameter processing method of the photographing apparatus of any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the image parameter processing method of the photographing apparatus of any one of claims 1 to 7.
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| CN202111458499.7A CN116233617A (en) | 2021-12-02 | 2021-12-02 | Image parameter processing method, device and equipment of shooting equipment and storage medium |
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