CN113382174B - Method and device for adjusting light supplement lamp of ultraviolet imaging device - Google Patents
Method and device for adjusting light supplement lamp of ultraviolet imaging device Download PDFInfo
- Publication number
- CN113382174B CN113382174B CN202110538812.1A CN202110538812A CN113382174B CN 113382174 B CN113382174 B CN 113382174B CN 202110538812 A CN202110538812 A CN 202110538812A CN 113382174 B CN113382174 B CN 113382174B
- Authority
- CN
- China
- Prior art keywords
- exposure time
- value
- gray
- adjusting
- pixel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013589 supplement Substances 0.000 title claims abstract description 83
- 238000003384 imaging method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004590 computer program Methods 0.000 claims description 30
- 230000001502 supplementing effect Effects 0.000 description 17
- 238000004364 calculation method Methods 0.000 description 9
- 239000006071 cream Substances 0.000 description 4
- 230000000475 sunscreen effect Effects 0.000 description 4
- 239000000516 sunscreening agent Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/90—Dynamic range modification of images or parts thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10141—Special mode during image acquisition
- G06T2207/10144—Varying exposure
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Studio Devices (AREA)
Abstract
The application relates to a method for adjusting a light supplement lamp of an ultraviolet imaging device. The method comprises the following steps: acquiring pixel gray value information of a current frame image; adjusting the current exposure time according to the pixel gray value information; and adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time. By adopting the method, the brightness of the ultraviolet light supplement lamp can be adjusted in real time, and the phenomenon of overexposure or underexposure is further avoided.
Description
Technical Field
The application relates to the field of electronic equipment, in particular to a method and a device for adjusting a light supplement lamp of an ultraviolet imaging device.
Background
With the gradual maturity of ultraviolet imaging technology, the application of ultraviolet imaging in different scenes is deeper and deeper. For example, in the field of skin care, the application of sunscreen cream can be observed by an ultraviolet imaging device, and particularly, the area where the chemical sunscreen cream is applied can be black under an ultraviolet image because the chemical sunscreen cream has the characteristic of absorbing ultraviolet rays. Therefore, the user can refer to the ultraviolet image to perform operations such as coating and makeup removal of the sunscreen cream.
Because image sensor is not strong to the sensitization ability of ultraviolet light, and in some specific occasions (like indoor), the intensity of ultraviolet is relatively weak, consequently, for the formation of image that ultraviolet image device can be clear, needs extra ultraviolet light filling lamp to carry out the light filling. However, in the prior art, the ultraviolet fill-in light cannot automatically adjust the brightness of the ultraviolet fill-in light according to the intensity of ultraviolet rays in the environment, which causes over-exposure or under-exposure in the ultraviolet presence.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus for adjusting a fill-in light of an ultraviolet imaging apparatus to solve the above technical problems.
A method for adjusting a fill-in light of an ultraviolet imaging device is characterized by comprising the following steps:
acquiring pixel gray value information of a current frame image; adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and adjusting the brightness of the ultraviolet light supplementing lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
In one embodiment, the adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time includes: if the first exposure time is longer than the preset maximum exposure time, the brightness of the ultraviolet light supplementing lamp is increased by one or more levels; and if the first exposure time is less than the preset minimum exposure time, reducing the brightness of the ultraviolet light supplement lamp by one or more grades.
In one embodiment, if the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplement lamp is the lowest level, the ultraviolet light supplement lamp is turned off.
In one embodiment, if the first exposure time is longer than the preset maximum exposure time, the increasing the brightness of the ultraviolet light supplement lamp by one or more levels includes: if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, the brightness of the ultraviolet light supplement lamp is reduced by one or more levels, including: if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
In one embodiment, if the second adjustment stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp, the ultraviolet light supplement lamp is turned off.
In one embodiment, the pixel grayscale value information includes a grayscale value of each pixel in the current frame image, and the adjusting the current exposure time according to the pixel grayscale value information includes: calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; comparing the gray average value with a preset standard gray value range; if the gray average value is larger than the upper limit value of the preset standard gray value range, the exposure time is reduced; and if the gray average value is smaller than the lower limit value of the preset standard gray value range, increasing the exposure time.
In one embodiment, the current frame image is divided into a plurality of sub-images; the calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image includes: calculating a sub-gray average value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and calculating the gray level average value according to each sub-gray level average value.
An ultraviolet imaging device light filling lamp adjusting device, the device includes: the acquisition unit is used for acquiring pixel gray value information of the current frame image; the first adjusting unit is used for adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and the second adjusting unit is used for adjusting the brightness of the ultraviolet light supplementing lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
A mobile phone comprises an ultraviolet imaging device, an ultraviolet light supplement lamp, a display screen and a mobile phone processor, wherein the ultraviolet imaging device, the ultraviolet light supplement lamp and the display screen are arranged on the same side, and the mobile phone processor is used for acquiring pixel gray value information of a current frame image acquired by the ultraviolet imaging device; adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the method for adjusting the supplementary lighting lamp of the ultraviolet imaging device when executing the computer program.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of any one of the methods for adjusting a fill light of an ultraviolet imaging apparatus.
According to the scheme, the pixel gray value information of the current frame image is obtained; adjusting the current exposure time according to the pixel gray value information; the brightness of the ultraviolet light supplementing lamp is adjusted according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time, so that the brightness of the ultraviolet light supplementing lamp can be adjusted in real time by the ultraviolet imaging device according to the ultraviolet intensity in the environment, and the phenomenon of overexposure or underexposure is avoided. Furthermore, the scheme directly determines how to adjust the light supplement lamp through the currently acquired ultraviolet image, thereby avoiding the additional increase of an environment ultraviolet intensity sensing device in the ultraviolet imaging device and avoiding the complication of the structure of the device.
Drawings
Fig. 1 is a flowchart of a method for adjusting a fill-in light of an ultraviolet imaging apparatus according to an embodiment;
FIG. 2 is a diagram of a device for adjusting a fill-in light of an ultraviolet imaging device in accordance with one embodiment;
fig. 3 is a schematic structural diagram of a mobile phone according to an embodiment.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, an embodiment of a method for adjusting a fill light of an ultraviolet imaging apparatus is provided, it should be noted that the steps illustrated in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be executed in an order different from that shown.
As shown in fig. 1, a method for adjusting a fill-in light of an ultraviolet imaging device includes the following steps:
step S102, pixel gray value information of the current frame image is obtained.
It should be noted that the ultraviolet imaging device refers to a device that images only by collecting light in the ultraviolet band. Optionally, the ultraviolet imaging device includes an ultraviolet camera and an ultraviolet light supplement lamp, the ultraviolet camera includes a lens assembly, a filter layer and an image sensor, wherein the filter layer is an ultraviolet band-pass filter layer, and the image sensor is a CMOS image sensor or a CCD image sensor. A commonly used image sensor in the prior art is a color image sensor, which is provided with a pixel structure with three colors of red, green and blue, and respectively collects light of the three colors of red, green and blue for imaging, and each pixel collects pixel values of the three colors of red, green and blue according to its own, i.e., surrounding pixels, to form an RGB value corresponding to each pixel, and finally forms a color image. In the ultraviolet camera, the image sensor only includes one pixel structure of ultraviolet pixels, and therefore, the image is finally formed into a monochromatic image. In order to make the image conform to the visual habits of the user, the ultraviolet image is presented in the form of a gray scale image, and therefore, information contained in each pixel in the ultraviolet image is a gray scale value. It should be noted that, in a gray-scale image, the pixel gray-scale value and the pixel brightness refer to the same value, and therefore, the "pixel gray-scale value information" in the above scheme may also refer to "pixel brightness value information", which is essentially a value obtained by converting an analog signal of charges generated by each pixel unit in the image sensor after receiving illumination into a digital signal.
Step S104, adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time;
it should be noted that the exposure time refers to the time period during which the pixel structure in the image sensor receives light irradiation for conversion and collects photoelectric conversion charges. As in a CMOS image sensor, a reset switch in each pixel is turned on to charge a PN junction capacitance in a photodiode, i.e., the pixel starts exposure, and light irradiates the PN junction in the photodiode to separate holes and electrons in a hole-electron pair, thereby generating electric charges. The charge is converted into a voltage signal through the source follower, and when the selection switch is turned on, the voltage signal is transmitted to the output bus, which represents that the exposure is finished. The conducting time of the selection switch and the conducting time interval of the reset switch are the exposure time. The longer the exposure time, the more charge is generated, i.e. the stronger the voltage signal transferred to the output bus. Therefore, when the light in the environment is weak, the charge generation in the photodiode is slow, and the exposure time needs to be prolonged to obtain a clear image, which otherwise results in "underexposure" of the image; when the light in the environment is strong, the charge generation in the photodiode is fast, and the exposure time needs to be shortened to obtain a clear image, which may otherwise result in "overexposure" of the image. Since the gray value of the pixel in the gray image can reflect "overexposure" or "underexposure" of the current image, the current exposure time can be adjusted according to the information of the gray value of the pixel. It should be noted that "adjusting the current exposure time according to the pixel gray-scale value information" does not directly adjust the exposure time actually performed by the image sensor, but calculates a theoretical value of the exposure time, that is, "obtaining the first exposure time" refers to a theoretical calculation value.
Optionally, the pixel gray-scale value information includes a gray-scale value of each pixel in the current frame image, and the adjusting the current exposure time according to the pixel gray-scale value information includes: calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; comparing the gray average value with a preset standard gray value range; if the gray average value is larger than the upper limit value of the preset standard gray value range, the exposure time is reduced; and if the gray average value is smaller than the lower limit value of the preset standard gray value range, increasing the exposure time.
In the above embodiment, the higher the gradation value is, the closer the color of the corresponding pixel is to white, that is, the higher the luminance of the corresponding pixel is, and the lower the gradation value is, the closer the color of the corresponding pixel is to black, that is, the lower the luminance of the corresponding pixel is. If the gray scale value ranges from 0 to 255, 0 is pure black, 255 is pure white, and gray is between 0 and 255, and the gray of the corresponding pixel becomes lighter and lighter as the gray scale value increases. Optionally, the higher the grayscale value is, the closer the color of the corresponding pixel is to black, that is, the lower the luminance of the corresponding pixel is, the lower the grayscale value is, the closer the color of the corresponding pixel is to white, that is, the higher the luminance of the corresponding pixel is, and further, the above-mentioned scheme is that, if the grayscale mean value is greater than the upper limit value of the preset standard grayscale value range, the exposure time is increased; and if the gray average value is smaller than the lower limit value of the range of the preset standard gray value, reducing the exposure time.
The standard gradation value range may be determined by "18 degrees gradation". Concept of "18 degree gray": the human eye is divided into 11 steps for gradual change from black to white, the middle step is moderate exposure intensity and becomes "middle gray", and the light length reflectance of the step is 18%, so it is "18 degree gray". And determining a standard gray value according to the "18-degree gray", and determining a standard gray value range according to the standard gray value, wherein if the determined standard gray value is 127, the standard gray value range can be set as 122-132.
It should be noted that, in the current frame image, some regions may have higher brightness, and some regions have lower brightness, and the gray-scale mean value reflects the exposure condition of the whole current frame image.
Optionally, the gray level average value of the current frame image is calculated according to the gray level value of each pixel in the current frame image, which may be the gray level average value of the whole current frame image.
Optionally, the current frame image is divided into a plurality of sub-images; the calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image includes: calculating a sub-gray average value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and calculating the gray level average value according to each sub-gray level average value.
It should be noted that, in the current frame image, some regions correspond to the main subject and some regions correspond to the background, and therefore, when adjusting the exposure, the exposure level of the region corresponding to the main subject needs to be considered. Therefore, in the above scheme, the current frame image is divided into a plurality of sub-images, and each sub-image has a weight corresponding to the sub-image, for example, the weight of the sub-image corresponding to the main subject is higher than the weight of the sub-image corresponding to the background, when the exposure time is calculated, the average gray scale value calculated in each sub-image is multiplied by the corresponding weight to obtain a sub-gray scale average value corresponding to each sub-image, and then the sub-gray scale average values are averaged to obtain a gray scale average value corresponding to the whole image, and then the exposure time is adjusted to make the exposure time more suitable for making the sub-image corresponding to the main subject image clearly imaged. Optionally, the average gray value of each sub-image may be used as the sub-pixel average value, and then the weighted average is performed on each sub-pixel average value to obtain the gray average value corresponding to the whole image.
Optionally, the weight corresponding to each sub-image may be preset, may be determined according to a selection operation of a user, or may be determined according to a gray value distribution in a histogram corresponding to the current frame image.
If the weight corresponding to each sub-image is determined according to the selection operation of the user, it may be determined that the weight of the sub-image corresponding to the selected position is higher than the weights of the remaining sub-images according to the position selected by the user in the image.
And step S106, adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
It should be noted that, since the exposure time is limited by the hardware structure of the image sensor itself, that is, when the exposure time is greater than or less than a certain value, the exposure time cannot be realized in hardware, the preset maximum exposure time and the preset minimum exposure time are preset according to the hardware characteristics of the image sensor itself. Optionally, the preset maximum exposure time and the preset minimum exposure time correspond to a hardware maximum exposure time and a hardware minimum exposure time of the image sensor. Optionally, the preset maximum exposure time and the preset minimum exposure time correspond to an upper limit value and a lower limit value of an exposure time range determined in a range from the hardware maximum exposure time of the image sensor to the minimum exposure time, so as to avoid that the exposure time enters a range close to the hardware maximum exposure time and the hardware minimum exposure time of the image sensor, which results in an unclear imaging.
Optionally, the adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time includes: if the first exposure time is longer than the preset maximum exposure time, the brightness of the ultraviolet light supplementing lamp is increased by one or more levels; and if the first exposure time is less than the preset minimum exposure time, reducing the brightness of the ultraviolet light supplement lamp by one or more grades.
It should be noted that the brightness of the ultraviolet supplementary lighting lamp can be divided into two levels of on and off, or can be divided into a plurality of levels greater than two levels, such as 5 levels. If the first exposure time is longer than the preset maximum exposure time, it is proved that the corresponding exposure time cannot be realized on hardware, that is, when the exposure time is adjusted to the maximum, the image still cannot reach the desired brightness under the influence of insufficient light intensity of the current environment, and at this time, the brightness of the ultraviolet light supplement lamp needs to be increased by one or more levels. If the first exposure time is less than the preset minimum exposure time, it is proved that the corresponding exposure time cannot be realized on hardware, namely, when the exposure time is adjusted to be minimum, the image is still in an overexposure state under the influence of the over-strong light intensity in the current environment, and at the moment, the brightness of the ultraviolet light supplement lamp needs to be reduced by one or more levels so as to reduce the light intensity of the current environment.
Further, if the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplement lamp is the lowest level, the ultraviolet light supplement lamp is turned off.
Optionally, if the first exposure time is longer than the preset maximum exposure time, increasing the brightness of the ultraviolet light supplement lamp by one or more levels, including: if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, the brightness of the ultraviolet light supplement lamp is reduced by one or more levels, including: if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
In the scheme, the number of the brightness stages of the ultraviolet light supplementing lamp to be adjusted is directly calculated by calculating the difference value between the current exposure time and the preset maximum exposure time and the difference value between the current exposure time and the preset minimum exposure time, so that the ultraviolet light supplementing lamp can be directly adjusted to proper brightness without being adjusted in a stage-by-stage manner, the brightness adjustment speed of the ultraviolet light supplementing lamp is accelerated,
optionally, calculating a first adjustment stage number according to the first difference includes: and dividing the preset unit exposure time by the first difference to obtain a first adjusting stage number. Calculating a second adjustment number according to the second difference value comprises: and dividing the preset unit exposure time by the second difference to obtain a second adjusting stage number. The preset unit exposure time refers to that the exposure time can be increased correspondingly for each level of brightness increase of the ultraviolet light supplement lamp on the premise that the ambient light intensity is constant and the image can be clearly imaged, or the exposure time can be increased correspondingly for each level of brightness decrease of the ultraviolet light supplement lamp.
Optionally, calculating a first adjustment stage number according to the first difference includes: and determining a first adjusting stage number according to the first preset difference range, wherein if the difference is within 0-10, the first adjusting stage number is 1 stage, and if the difference is within 11-20, the second adjusting stage number is 2 stages. Calculating a second adjustment number according to the second difference comprises: and determining a second adjusting stage number according to the second preset difference range, wherein if the difference is within 0-10, the second adjusting stage number is 1, and if the difference is within 11-20, the second adjusting stage number is 2.
Further, if the second adjustment stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp, the ultraviolet light supplement lamp is turned off.
In this embodiment, the ultraviolet imaging device can adjust the brightness of the ultraviolet light supplement lamp in real time according to the ultraviolet intensity in the environment, and then avoid the phenomenon of overexposure or underexposure. Meanwhile, the embodiment directly determines how to adjust the light supplement lamp through the currently collected ultraviolet image, thereby avoiding the additional increase of an environment ultraviolet intensity sensing device in the ultraviolet imaging device and avoiding the complication of the structure of the device.
Example 2
According to an embodiment of the present invention, there is also provided an apparatus for adjusting a fill-in light of an ultraviolet imaging apparatus, as shown in fig. 2, including:
the acquisition unit is used for acquiring pixel gray value information of the current frame image; the first adjusting unit is used for adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and the second adjusting unit is used for adjusting the brightness of the ultraviolet light supplementing lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
Optionally, the second adjusting unit includes: the first heightening module is used for heightening the brightness of the ultraviolet light supplementing lamp by one or more grades when the first exposure time is longer than the preset maximum exposure time; and the first lowering module is used for lowering the brightness of the ultraviolet light supplementing lamp by one or more grades when the first exposure time is less than the preset minimum exposure time.
Optionally, the second adjusting unit includes: and the first closing module is used for closing the ultraviolet light supplementing lamp when the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplementing lamp is the lowest level.
Optionally, the first raising module includes: the first calculation module is used for calculating a first difference value between the first exposure time and the preset maximum exposure time when the first exposure time is greater than the preset maximum exposure time; the second calculation module is used for calculating a first adjusting stage number according to the first difference value; the second heightening module is used for heightening the brightness of the ultraviolet light supplement lamp by corresponding stages according to the first adjusting stage; a first turn-down module comprising: the third calculation module is used for calculating a second difference value between the first exposure time and the preset minimum exposure time when the first exposure time is smaller than the preset minimum exposure time; the fourth calculation module is used for calculating a second adjustment stage number according to the second difference value; and the second dimming module is used for dimming the brightness of the ultraviolet light supplement lamp by corresponding stages according to the second adjusting stage.
Optionally, the second adjusting unit includes: and the second closing module is used for closing the ultraviolet light supplement lamp when the second adjusting stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp.
Optionally, the pixel grayscale value information includes a grayscale value of each pixel in the current frame image, and the first adjusting unit includes: the fifth calculation module is used for calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; the comparison module is used for comparing the gray average value with a preset standard gray value range; the third heightening module is used for lowering the exposure time when the gray average value is larger than the upper limit value of the preset standard gray value range; and the third lowering module is used for raising the exposure time when the gray average value is smaller than the lower limit value of the preset standard gray value range.
Optionally, the current frame image is divided into a plurality of sub-images; the fifth calculation module includes: the first calculation submodule is used for calculating a sub-gray mean value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and the second calculation submodule is used for calculating the gray average value according to each sub-gray average value.
Example 3
According to an embodiment of the present invention, there is also provided a mobile phone, as shown in fig. 3, including: the mobile phone comprises an ultraviolet imaging device 301, a display screen 304 and a mobile phone processor 305, wherein the ultraviolet imaging device 301 comprises an ultraviolet camera 302 and an ultraviolet light supplement lamp 303, the ultraviolet imaging device 301 and the display screen 304 are arranged on the same side, and the mobile phone processor 305 is used for acquiring pixel gray value information of a current frame image acquired by the ultraviolet camera 302; adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and adjusting the brightness of the ultraviolet light supplement lamp 303 according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: the adjusting the brightness of the ultraviolet light supplement lamp 303 according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time includes: if the first exposure time is longer than the preset maximum exposure time, the brightness of the ultraviolet light supplementing lamp 303 is increased by one or more levels; if the first exposure time is less than the preset minimum exposure time, the brightness of the ultraviolet light supplement lamp 303 is reduced by one or more levels.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: and if the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplement lamp is the lowest level, turning off the ultraviolet light supplement lamp 303.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: if the first exposure time is longer than the preset maximum exposure time, the step of increasing the brightness of the ultraviolet light supplement lamp 303 by one or more levels includes: if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp 303 is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, the adjusting the brightness of the ultraviolet light supplement lamp 303 by one or more levels includes: if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp 303 is adjusted to be lower by a corresponding stage.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: if the second adjustment stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp 303, turning off the ultraviolet light supplement lamp 303.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: the pixel gray value information comprises the gray value of each pixel in the current frame image, and the adjusting of the current exposure time according to the pixel gray value information comprises the following steps: calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; comparing the gray average value with a preset standard gray value range; if the gray average value is larger than the upper limit value of the range of the preset standard gray value, the exposure time is reduced; and if the gray average value is smaller than the lower limit value of the preset standard gray value range, increasing the exposure time.
Optionally, the following steps are implemented when the mobile phone processor 305 executes the computer program: the current frame image is divided into a plurality of sub-images; the calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image includes: calculating a sub-gray average value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and calculating the gray level average value according to each sub-gray level average value.
It should be noted that the mobile phone may further include a chip module, such as a DSP module, which is capable of running a program and performing data processing, other than the mobile phone processor 305, and the computer program executed by the mobile phone processor 305 may be partially executed by other chip modules, for example, a program for "adjusting the current exposure time according to the pixel gray-scale value information to obtain the first exposure time" may be executed by the DSP module connected to the ultraviolet imaging device 301.
Example 4
According to an embodiment of the present invention, there is provided a computer device including a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring pixel gray value information of a current frame image; adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and adjusting the brightness of the ultraviolet light supplementing lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
In one embodiment, the processor when executing the computer program further performs the steps of: the adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time comprises the following steps: if the first exposure time is longer than the preset maximum exposure time, the brightness of the ultraviolet light supplement lamp is increased by one or more levels; and if the first exposure time is less than the preset minimum exposure time, reducing the brightness of the ultraviolet light supplement lamp by one or more grades.
In one embodiment, the processor when executing the computer program further performs the steps of: and if the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplement lamp is the lowest level, turning off the ultraviolet light supplement lamp.
In one embodiment, the processor, when executing the computer program, further performs the steps of: if the first exposure time is longer than the preset maximum exposure time, increasing the brightness of the ultraviolet light supplement lamp by one or more levels, including: if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, the brightness of the ultraviolet light supplement lamp is reduced by one or more levels, including: if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the second adjusting stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp, turning off the ultraviolet light supplement lamp.
In one embodiment, the processor, when executing the computer program, further performs the steps of: the pixel gray value information comprises the gray value of each pixel in the current frame image, and the adjusting of the current exposure time according to the pixel gray value information comprises the following steps: calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; comparing the gray average value with a preset standard gray value range; if the gray average value is larger than the upper limit value of the preset standard gray value range, the exposure time is reduced; and if the gray average value is smaller than the lower limit value of the preset standard gray value range, increasing the exposure time.
In one embodiment, the processor when executing the computer program further performs the steps of: the current frame image is divided into a plurality of sub-images; the calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image includes: calculating a sub-gray mean value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and calculating the gray level average value according to each sub-gray level average value.
Example 5
According to an embodiment of the invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring pixel gray value information of a current frame image; adjusting the current exposure time according to the pixel gray value information to obtain a first exposure time; and adjusting the brightness of the ultraviolet light supplementing lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time.
In one embodiment, the computer program when executed by the processor further performs the steps of: the computer program when executed by the processor further realizes the steps of: the adjusting the brightness of the ultraviolet light supplement lamp according to the numerical relationship between the first exposure time and the preset maximum exposure time and the numerical relationship between the first exposure time and the preset minimum exposure time comprises the following steps: if the first exposure time is longer than the preset maximum exposure time, the brightness of the ultraviolet light supplement lamp is increased by one or more levels; and if the first exposure time is less than the preset minimum exposure time, reducing the brightness of the ultraviolet light supplement lamp by one or more grades.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the first exposure time is less than the preset minimum exposure time and the current brightness level of the ultraviolet light supplement lamp is the lowest level, turning off the ultraviolet light supplement lamp.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the first exposure time is longer than the preset maximum exposure time, increasing the brightness of the ultraviolet light supplement lamp by one or more levels, including: if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, the brightness of the ultraviolet light supplement lamp is reduced by one or more levels, including: if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the second adjusting stage number is greater than or equal to the current brightness stage number of the ultraviolet light supplement lamp, turning off the ultraviolet light supplement lamp.
In one embodiment, the computer program when executed by the processor further performs the steps of: the pixel gray value information comprises the gray value of each pixel in the current frame image, and the adjusting of the current exposure time according to the pixel gray value information comprises the following steps: calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image; comparing the gray average value with a preset standard gray value range; if the gray average value is larger than the upper limit value of the range of the preset standard gray value, the exposure time is reduced; and if the gray average value is smaller than the lower limit value of the range of the preset standard gray value, increasing the exposure time.
In one embodiment, the computer program when executed by the processor further performs the steps of: the current frame image is divided into a plurality of sub-images; the calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image includes: calculating a sub-gray average value corresponding to the sub-image according to the gray value of each pixel in the sub-image and the weight corresponding to the sub-image; and calculating the gray level average value according to each sub-gray level average value.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (8)
1. A method for adjusting a fill-in light of an ultraviolet imaging device is characterized by comprising the following steps:
acquiring the gray value of each pixel of the current frame image;
calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image and the weight value of each pixel;
adjusting the current exposure time according to the gray average value to obtain a first exposure time;
if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time;
calculating a first adjusting stage number according to the first difference value;
according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage;
if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time;
calculating a second adjusting stage number according to the second difference value;
and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
2. The method of claim 1, wherein if the first exposure time is less than the predetermined minimum exposure time and the current brightness level of the UV fill-in light is the lowest level, turning off the UV fill-in light.
3. The method of claim 1, wherein if the second adjustment number is greater than or equal to a current brightness number of the ultraviolet fill light, the ultraviolet fill light is turned off.
4. The method of claim 1, wherein the pixel gray scale value information comprises a gray scale value of each pixel in the current frame image, and wherein adjusting the current exposure time according to the pixel gray scale value information comprises:
calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image;
comparing the gray average value with a preset standard gray value range;
if the gray average value is larger than the upper limit value of the preset standard gray value range, the exposure time is reduced;
and if the gray average value is smaller than the lower limit value of the preset standard gray value range, increasing the exposure time.
5. The utility model provides an ultraviolet image device light filling lamp adjusting device which characterized in that, the device includes:
the acquiring unit is used for acquiring the gray value of each pixel of the current frame image;
the first adjusting unit is used for calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image and the weight value of each pixel; adjusting the current exposure time according to the gray average value;
the second adjusting unit is used for calculating a first difference value between the first exposure time and the preset maximum exposure time if the first exposure time is greater than the preset maximum exposure time;
calculating a first adjusting stage number according to the first difference value;
according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage;
if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time;
calculating a second adjusting stage number according to the second difference value;
and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
6. A mobile phone is characterized by comprising an ultraviolet imaging device, a display screen and a mobile phone processor, wherein the ultraviolet imaging device comprises an ultraviolet camera and an ultraviolet light supplement lamp, the ultraviolet imaging device and the display screen are arranged on the same side, and the mobile phone processor is used for acquiring the gray value of each pixel of a current frame image; calculating the gray average value of the current frame image according to the gray value of each pixel in the current frame image and the weight value of each pixel; adjusting the current exposure time according to the gray average value to obtain a first exposure time; if the first exposure time is longer than the preset maximum exposure time, calculating a first difference value between the first exposure time and the preset maximum exposure time; calculating a first adjusting stage number according to the first difference value; according to the first adjusting stage, the brightness of the ultraviolet light supplement lamp is increased by a corresponding stage; if the first exposure time is less than the preset minimum exposure time, calculating a second difference value between the first exposure time and the preset minimum exposure time; calculating a second adjusting stage number according to the second difference value; and according to the second adjusting stage, the brightness of the ultraviolet light supplement lamp is adjusted to be lower by a corresponding stage.
7. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 4.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538812.1A CN113382174B (en) | 2021-05-18 | 2021-05-18 | Method and device for adjusting light supplement lamp of ultraviolet imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538812.1A CN113382174B (en) | 2021-05-18 | 2021-05-18 | Method and device for adjusting light supplement lamp of ultraviolet imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113382174A CN113382174A (en) | 2021-09-10 |
| CN113382174B true CN113382174B (en) | 2022-09-27 |
Family
ID=77571184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110538812.1A Active CN113382174B (en) | 2021-05-18 | 2021-05-18 | Method and device for adjusting light supplement lamp of ultraviolet imaging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113382174B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118608A (en) * | 2009-12-30 | 2011-07-06 | 捷达世软件（深圳）有限公司 | System and method for adjusting video monitoring light |
| CN102291538A (en) * | 2011-08-17 | 2011-12-21 | 浙江博视电子科技股份有限公司 | Automatic exposure method and control device of camera |
| CN103488026A (en) * | 2013-09-05 | 2014-01-01 | 广东欧珀移动通信有限公司 | Method and system for regulating luminance of camera fill flash |
| CN106534712A (en) * | 2016-10-24 | 2017-03-22 | 北京旷视科技有限公司 | Control method, image processing unit, light-filling and camera device |
| CN111510637A (en) * | 2020-04-20 | 2020-08-07 | 威海德盛电子有限公司 | Brightness adjusting method and device of light supplementing device, road light supplementing device and electronic equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563306C (en) * | 2007-07-25 | 2009-11-25 | 北京中星微电子有限公司 | A kind of camera head light filling lamp autocontrol method and device |
| TWI653563B (en) * | 2016-05-24 | 2019-03-11 | 仁寶電腦工業股份有限公司 | Projection touch image selection method |
| CN108810420A (en) * | 2017-05-03 | 2018-11-13 | 迅驰（北京）视讯科技有限公司 | Control method, system and the Car license recognition instrument of light compensating lamp |
| CN110636229B (en) * | 2019-10-24 | 2021-06-22 | 重庆紫光华山智安科技有限公司 | Image light supplement adjusting method and device and electronic equipment |
-
2021
- 2021-05-18 CN CN202110538812.1A patent/CN113382174B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118608A (en) * | 2009-12-30 | 2011-07-06 | 捷达世软件（深圳）有限公司 | System and method for adjusting video monitoring light |
| CN102291538A (en) * | 2011-08-17 | 2011-12-21 | 浙江博视电子科技股份有限公司 | Automatic exposure method and control device of camera |
| CN103488026A (en) * | 2013-09-05 | 2014-01-01 | 广东欧珀移动通信有限公司 | Method and system for regulating luminance of camera fill flash |
| CN106534712A (en) * | 2016-10-24 | 2017-03-22 | 北京旷视科技有限公司 | Control method, image processing unit, light-filling and camera device |
| CN111510637A (en) * | 2020-04-20 | 2020-08-07 | 威海德盛电子有限公司 | Brightness adjusting method and device of light supplementing device, road light supplementing device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113382174A (en) | 2021-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110033418B (en) | Image processing method, image processing device, storage medium and electronic equipment | |
| JP4372747B2 (en) | Luminance level conversion device, luminance level conversion method, solid-state imaging device, luminance level conversion program, and recording medium | |
| US10021313B1 (en) | Image adjustment techniques for multiple-frame images | |
| US8724921B2 (en) | Method of capturing high dynamic range images with objects in the scene | |
| KR100437880B1 (en) | Determining a final exposure setting automatically for a solid state camera without a separate light metering circuit | |
| CN112118388B (en) | Image processing method, image processing device, computer equipment and storage medium | |
| JP4163353B2 (en) | Image processing device | |
| CN102340673B (en) | White balance method for video camera aiming at traffic scene | |
| US8013907B2 (en) | System and method for adaptive local white balance adjustment | |
| US20090015683A1 (en) | Image processing apparatus, method and program, and recording medium | |
| JP7343090B2 (en) | Image processing system and method | |
| EP3162048B1 (en) | Exposure metering based on background pixels | |
| CN110246101B (en) | Image processing method and device | |
| CN110047060B (en) | Image processing method, image processing device, storage medium and electronic equipment | |
| JP4736939B2 (en) | Imaging apparatus and image processing method | |
| CN104284096A (en) | Method and system of multi-target automatic exposure and gain control based on pixel intensity distribution | |
| JP2007082181A (en) | Imaging apparatus and image processing method | |
| US11601600B2 (en) | Control method and electronic device | |
| US8400522B2 (en) | Method and apparatus for applying tonal correction to images | |
| JP2007028088A (en) | Imaging apparatus and image processing method | |
| CN113382174B (en) | Method and device for adjusting light supplement lamp of ultraviolet imaging device | |
| US10546369B2 (en) | Exposure level control for high-dynamic-range imaging, system and method | |
| EP1326209B1 (en) | Method for contrast enhancement in colour digital image | |
| CN109831632B (en) | Imaging method of image sensor | |
| CN112822413A (en) | Shooting preview method, device, terminal and computer readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |