TWI382752B - Image capturing device and light compensating method thereof - Google Patents

Description

Camera device and light filling method thereof

The invention relates to an image pickup device and a light filling method thereof.

When an imaging device such as a conventional camera or a digital camera is used for imaging, the backlight is used for brightness compensation. The fill light is always turned on when the camera is photographing to increase the brightness of the environment. However, the intensity of the light output by the fill lamp is fixed, that is, the fill light intensity is the same regardless of the brightness of the brighter or darker environment, which may result in poor brightness and contrast of the image, and cannot achieve the effect expected by the user. Affects the quality of the image taken.

In view of the above, it is necessary to provide an image pickup device capable of controlling the fill light intensity according to the ambient brightness and a light filling method thereof.

A camera device includes an image sensor electrically connected to each other, a microprocessor and a fill light. The image sensor is used to acquire an image. The microprocessor includes a smart fill light device. The smart fill light device includes a calculation module, a storage module, a recording module, a smart judgment module, and a smart fill light unit. The calculation module is configured to calculate a current ambient brightness according to the image acquired by the image sensor. The storage module is configured to store a predefined fill light intensity table, and the fill light intensity defined by the fill light intensity table corresponds to a current ambient brightness. The smart fill light unit includes a first smart fill light module and a second smart fill light module. The recording module is configured to record the serial number of each fill light and its corresponding fill light intensity. The smart judging module judges the current by querying the information in the recording module Whether the fill light has been filled with light, if the current fill light has not filled light, an instruction is issued to activate the first smart fill light module, and if the current fill light has been filled, an instruction is issued to start The second smart fill light module. The first smart fill light module is configured to query a first fill light intensity table stored in the storage module according to a current ambient brightness to determine a first fill light intensity required by the current environment, where the second smart fill light module is used. Querying the second fill light intensity table stored in the storage module according to the previous fill light intensity and the current ambient brightness corrected by the fill light to determine a second fill light intensity required by the current environment. The fill light is further configured to perform fill light according to the first fill light intensity or the second fill light intensity determined by the smart fill light unit.

A light filling method of the above camera device, comprising the steps of: turning on a fill light of the image capturing device; acquiring an image; calculating a current ambient brightness of the image; providing a predefined fill light intensity table, The fill light intensity defined by the fill light intensity table corresponds to the current ambient brightness, and the fill light intensity table includes a first fill light intensity table and a second fill light intensity table; determining whether the current fill light has been filled with light; If the fill light does not fill light, the first fill light intensity table is queried according to the current ambient brightness to determine the first fill light intensity required by the current environment; if the current fill light has been filled, then Querying the second fill light intensity table according to the previous fill light intensity and the current ambient brightness corrected by the fill light to determine a second fill light intensity required by the current environment; the fill light is based on the first fill light intensity Or the second fill light intensity is used to fill light; the image is acquired and photographed.

Compared with the prior art, the image pickup device and the light filling method thereof use a microprocessor to calculate the current ambient brightness and determine the fill light required by the current environment. The intensity, then the fill light is supplemented according to the fill light intensity, so different fill light intensity can be used according to different current ambient brightness, thereby effectively improving the image quality.

Referring to FIG. 1 , an image pickup apparatus 100 according to an embodiment of the present invention includes an image sensor 110 , a microprocessor 120 , and a fill light 130 electrically connected to each other.

The image sensor 110 is configured to acquire an image. It can be understood that if the current fill light 150 has not been filled, the image acquired by the image sensor 110 is an image under the current ambient brightness. If the current fill light 150 has been filled with light, the image acquired by the image sensor 110 is an image of the current ambient brightness corrected by the fill light 150.

The microprocessor 120 includes a first judging module 121, a fixed-intensity fill-in device 122, a smart fill-in device 123 and a second judging module 140.

The first determining module 121 is configured to determine whether the imaging device 100 is in a normal fill mode or a smart fill mode, and if in the normal fill mode, issue an instruction to activate the fixed intensity fill device 122, if it is in wisdom In the light mode, the smart fill device 123 is activated by issuing an instruction. The fixed-intensity light-filling device 122 can control the fill light 150 to fill light with a predetermined fill light intensity.

The smart fill light device 123 is configured to calculate a current ambient brightness according to the image acquired by the image sensor 110, and query a predefined fill light intensity table according to the current ambient brightness to determine the fill light intensity required by the current environment. Degree, the fill light intensity defined by the fill light intensity table corresponds to the current ambient brightness. The smart fill device 123 includes a calculation module 124, a recording module 125, a smart determination module 126, a storage module 127, and a smart fill light unit 130. The calculation module 124 is configured to calculate a current ambient brightness according to the image acquired by the image sensor 110. The recording module 125 is configured to record the serial number of each fill light and its corresponding fill light intensity. For example, if the current fill light 150 does not fill the light, the recording module 125 has no data; if the current fill light 150 has If the fill light is performed once, the serial number 1 and its corresponding fill light intensity are recorded; if the current fill light 150 has been filled twice, the serial number 2 and its corresponding fill light intensity are recorded. The smart judgment module 126 determines whether the current fill light 150 has been filled with light by querying the data in the record module 125. For example, if there is no data in the record module 125, it indicates that the current fill light 150 has not been filled. When the light is sent, the first smart fill light module 128 is activated. If the data is found in the record module 125, it indicates that the current fill light 150 has been filled with light, and the second smart fill light module 129 is started. A pre-defined fill light intensity table is stored in the storage module 127, and the fill light intensity defined by the fill light intensity table corresponds to the current ambient brightness. The fill light intensity meter includes a first fill light intensity meter and a second fill light intensity meter.

The smart fill light unit 130 includes a first smart fill light module 128 and a second smart fill light module 129 . The first smart fill light module 128 is configured to query the first fill light intensity table stored in the storage module 127 according to the current ambient brightness to determine a first fill light intensity required by the current environment. The second smart fill light module 129 queries the fill light 150 obtained by the calculation module 124 by querying the previous fill light intensity in the recording module 125. After the corrected current ambient brightness, the second fill light intensity table stored in the storage module 127 is then queried to determine the second fill light intensity required by the current environment. Since the fill light intensity of the fill light 150 is reflected by the pulse width modulation duty ratio of the fill light 150, the relationship between the fill light intensity and the pulse width modulation duty ratio is one-to-one, that is, the greater the fill light intensity The required pulse width modulation duty cycle is larger. In the present embodiment, the pulse width modulation duty ratio is used to represent the corresponding fill light intensity. The first fill light intensity meter shown in Table (1) and the second fill light intensity meter shown in Table (2). The standard ambient brightness in Tables (1) and (2) refers to the ambient brightness required for the image captured by the camera device 100 to have the best brightness and contrast.

For example, if the smart judging module 126 determines that the light has not been supplemented, the first smart fill light module 128 is activated. The calculation module 124 calculates the current ambient brightness system 60, and the standard ambient brightness should be 120. The first smart fill light module 128 queries the first fill light intensity table to determine the pulse width modulation duty ratio required by the current environment. 60%. If the smart judging module 126 determines that the current fill light 150 has been supplemented by the recording module 125, and knows that the previous fill light intensity is 60%, the second smart fill light module 128 is activated. If the calculation module 124 calculates that the current ambient brightness after the correction of the fill light is still the normal value 120, the second smart fill light module 129 is obtained by querying the second fill light intensity table stored in the storage module 127. The pulse width modulation duty cycle required by the current environment is still unchanged, still 60%. If the calculation module 124 calculates that the current ambient brightness after the correction of the fill light is greater than 120, which is 150, the second smart fill light module 129 queries the second fill light intensity table stored in the storage module 127. It is known that the pulse width modulation duty ratio needs to be appropriately reduced from 60% to 40% to prevent the image taken by the image pickup device 100 from being too bright. If the calculation module 124 calculates that the current ambient brightness after the correction of the fill light is less than 120, which is 100, the second smart fill light module 129 queries the second fill light intensity table stored in the storage module 127. It is known that the pulse width modulation duty ratio needs to be appropriately increased from 60% to 80%, so that the current ambient brightness can reach the standard ambient brightness by 120 after the fill light 150 is filled.

The second judging module 140 is configured to determine whether to continue shooting. At this time, a dialog box “Continue to shoot” appears on the user interface of the camera apparatus 100. If the user selects “Yes”, the second judging mode is performed. Block 140 will know that it is still necessary to continue shooting, the smart fill light device 123 continues to work; if the user selects "No", the second determination module 140 knows that it is not necessary to continue shooting, the wisdom supplement The light device 123 ends its work.

The fill light 150 is used to fill light according to the fill light intensity obtained by the microprocessor 120. After the fill light 150 is turned on, there is a time delay, and the fill light is not immediately applied, and the fixed light fill device 122 or the smart fill light device 123 in the microprocessor 120 is required to determine the fill light 150. After the fill light intensity of the first fill light, the fill light 150 is filled with light according to the determined fill light intensity of the first fill light.

The working process of the image capturing apparatus 100 is as follows: the fill light 150 of the image capturing apparatus 100 is turned on, and the first determining module 121 determines whether the image capturing apparatus 100 is in a normal fill light mode or a smart fill light mode. In the light mode, the fixed-intensity light-filling device 122 is activated, and the fill light 150 is supplemented with a predetermined fill light intensity; if in the smart fill light mode, the smart light-filling device 123 is activated, and the light-filling device 123 is first calculated. The current ambient brightness of the image is displayed, and then a predefined fill light intensity table is queried according to the current ambient brightness to determine the fill light intensity required by the current environment. Then, the second determining module 140 determines whether it is necessary to continue shooting. If it is necessary to continue shooting, the smart light filling device 123 continues to operate; if it is not necessary to continue shooting, the smart light filling device 123 ends the operation.

As shown in FIG. 2, a light filling method of the image capturing apparatus 100 includes the following steps:

S1: Turn on the fill light 150 in the image pickup apparatus 100.

S2: It is determined whether the imaging apparatus 100 is in a normal fill light mode or a smart fill light mode.

S3: If it is in the normal fill mode, the fill light 150 fills the light with a predetermined fill light intensity.

S4: If it is in the smart fill mode, the image is acquired.

S5: Calculate the current ambient brightness of the image.

S6: Query a predefined fill light intensity table according to the current ambient brightness to determine the fill light intensity required by the current environment, and the fill light intensity defined by the fill light intensity table corresponds to the current ambient brightness. In this embodiment, the step further includes the following substeps: first determining whether the current fill light 150 has been filled with light, and if not, querying the first fill light intensity table stored in the image capturing apparatus 100 according to the current ambient brightness. Determining the required first fill light intensity in the current environment; if yes, querying the second fill light intensity table stored in the image capturing apparatus 100 according to the previous fill light intensity and the current ambient brightness corrected by the fill light Determine the second fill light required for the current environment.

S7: The fill light 150 fills the light according to the fill light intensity.

S8: Acquire an image and shoot.

S9: Determine whether to continue shooting.

S10: If yes, go to step S4.

S11: If not, the operation of the imaging apparatus 100 ends.

Compared with the prior art, the image pickup device of the present invention and the light filling method thereof utilize a micro The processor calculates the current ambient brightness, determines the fill light intensity required by the current environment, and then fills the light according to the fill light intensity, so that different fill light intensity can be used according to different current ambient brightness, thereby effectively improving image quality. .

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧ camera

110‧‧‧Image Sensor

120‧‧‧Microprocessor

121‧‧‧First Judgment Module

122‧‧‧Fixed light fill device

123‧‧‧Smart Filling Device

124‧‧‧ Calculation Module

125‧‧‧recording module

126‧‧‧Smart Judgment Module

127‧‧‧ memory module

128‧‧‧First Smart Filling Module

129‧‧‧Second Smart Filling Module

130‧‧‧Smart Filling Unit

140‧‧‧Second judgment module

150‧‧‧ fill light

FIG. 1 is a functional block diagram of an image pickup apparatus according to an embodiment of the present invention; FIG. 2 is a flow chart of a light fill method of an image pickup apparatus according to an embodiment of the present invention.

100‧‧‧ camera

110‧‧‧Image Sensor

120‧‧‧Microprocessor

121‧‧‧First Judgment Module

122‧‧‧Fixed light fill device

123‧‧‧Smart Filling Device

124‧‧‧ Calculation Module

125‧‧‧recording module

126‧‧‧Smart Judgment Module

127‧‧‧ memory module

128‧‧‧First Smart Filling Module

129‧‧‧Second Smart Filling Module

130‧‧‧Smart Filling Unit

140‧‧‧Second judgment module

150‧‧‧ fill light

Claims (7)

An image capturing device includes an image sensor and a fill light, the image sensor is configured to acquire an image, and the fill light is used to fill the current environment, and the improvement is that the camera device further The invention comprises a microprocessor electrically connected to the image sensor and the fill light, the microprocessor comprises a smart fill light device, wherein the smart fill light device comprises a calculation module, a storage module, a recording module, and a wisdom a determining module and a smart fill light unit, wherein the calculating module is configured to calculate a current ambient brightness according to the image acquired by the image sensor, and the storage module is configured to store a predefined fill light intensity table, the fill light The fill light intensity defined by the intensity table corresponds to the current ambient brightness, and the smart fill light unit includes a first smart fill light module and a second smart fill light module, and the record module is configured to record the serial number of each fill light and Corresponding to the fill light intensity, the smart judgment module queries whether the current fill light has been filled with light by querying the data in the recording module, and if the current fill light has not filled the light, the smart judgment light is sent The first smart fill light module is activated by instructing to activate the second smart fill light module, and the first smart fill light module is configured to query according to the current ambient brightness if the current fill light has been filled. a first fill light intensity table stored in the storage module to determine a first fill light intensity required by the current environment, and the second smart fill light module is configured to use the fill light intensity according to the previous time and the fill light Querying the second ambient light intensity table stored in the storage module to determine a second fill light intensity required by the current environment, the fill light is further determined according to the smart fill light unit The first fill light intensity or the second fill light intensity fills the light. The image pickup device according to claim 1, wherein the fill light intensity is represented by a pulse width modulation duty ratio, and the patch light intensity is larger, and the pulse width modulation is used. The duty cycle is greater. The camera device of claim 1, wherein the microprocessor further comprises a first determining module and a fixed intensity light filling device, wherein the first determining module is configured to determine that the camera device is in a general fill light The mode is also a smart fill mode, if in the normal fill mode, an instruction is issued to activate the fixed-intensity light-filling device, and if in the smart fill mode, an instruction is issued to activate the smart fill light device, the fixed-intensity fill light The device is used to control the fill light to fill light with a predetermined intensity. The camera device of claim 1, wherein the microprocessor further comprises a second determining module, wherein the second determining module is configured to determine whether to continue shooting, and if so, the smart light filling device Continue to work, if not, then the smart fill device ends the work. A method for filling light of a camera device, comprising the steps of: turning on a fill light of the camera device; acquiring an image; calculating a current ambient brightness of the image; providing a predefined fill light intensity table, the complement The fill light intensity defined by the light intensity meter corresponds to the current ambient brightness, and the fill light intensity table includes a first fill light intensity table and a second fill light intensity table; determining whether the current fill light has been filled with light; The fill light does not fill light, and the first fill light intensity table is queried according to the current ambient brightness to determine the first fill light intensity required by the current environment; if the current fill light has been filled, then according to Querying the second fill light intensity table to determine the second fill light intensity required by the current environment according to the previous fill light intensity and the current ambient brightness corrected by the fill light; the fill light is based on the first fill light intensity or The second fill light intensity is complemented; the image is acquired and photographed. The method of supplementing light of an image pickup device according to claim 5, wherein after the step of acquiring an image and performing photographing, the method further comprises the following steps : judging whether to continue shooting; if yes, then transferring to the step of acquiring an image; if not, the operation of the camera is over. The method of supplementing light of the image pickup device according to claim 5, wherein after the step of turning on the fill light in the image pickup device, the method further comprises the step of: determining that the image capturing device is in a normal fill mode It is also a smart fill mode; if it is in the normal fill mode, it uses a predetermined fill light intensity to fill the light; if it is in the smart fill mode, it goes to the step of acquiring the image.