TWI237148B - Flashlight equipment and generating flashlight method - Google Patents

Abstract

This invention provides flashlight equipment and generating method of flashlight. The flashlight equipment comprises an image sensor, an automatic exposure unit, a processor, and a flashlight module. The image sensor picks up the image and distance parameters of a photography object. The automatic exposure unit calculates a desired lighting. The processor produces an electric discharge parameter based on the distance parameter and the desired lighting. According to the electric discharge parameter, the flashlight module supplies a photography light source. The generating method of flashlight comprises the following procedures: (A) it employs the image sensor to pick up the distance parameter and the desired lighting calculated by the automatic exposure unit. (B) The processor produces an electric discharge parameter based on the distance parameter and the desired lighting. (C) According to the electric discharge parameter, the flashlight module produces a photography light source for photography.

Description

1237148 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a flash device and a flash method, and more particularly to a flash device and a flash method that can automatically adjust the amount of light emitted according to the distance of a subject. [Previous technology] At present, most cameras have a built-in flash. When the external light source is insufficient, it is used to provide an additional light source during image acquisition to ensure image quality. However, the conventional camera's flash can only fully emit light or It does not emit light at all, which may cause the flash exposure error due to the large distance between the subject and the environment or the brightness. When the sensor detects that the light provided by the flash is sufficient, the light sensor & notifies the flash to stop discharging to avoid overexposure, but this method requires an additional light sensor, which will cause Production costs have increased, so there is still room for improvement. [Summary of the Invention] The main object of the present invention is to propose a method that can be based on a photographic error of a subject. A preferred embodiment of the flash device is an automatic exposure unit, a processing unit, and an image sensing unit that can capture a shot for a flash device and provide a light source at a distance from the flash to avoid flash exposure. Includes: an image sensing unit, a memory unit And a flash module, an image of the subject and a distance parameter, and

1237148 V. Description of the invention (2) The automatic exposure unit calculates a light amount required for image acquisition, the processing unit generates a discharge parameter according to the distance parameter and the light amount, and generates a discharge time according to a look-up table in the memory unit. The flash module provides a shooting light source according to the discharge time. The flash method includes the following steps: A. Provide an image sensing unit, an automatic exposure unit, a processing unit, and a flash module. The image sensing unit can capture a distance parameter of a shooting subject, and the automatic exposure unit. Coupled to the image sensing unit, the processing unit can generate a discharge parameter, and the flash module is coupled to the processing unit; B · The image sensing unit captures one of the distance parameter and the automatic exposure unit to calculate one of the shooting requirements C. The processing unit obtains a discharge parameter according to the distance parameter and the light amount; D. The flash module generates a shooting light source for shooting according to the discharge parameter. In order to allow your reviewers to further understand and understand the features, objectives, and functions of the present invention, detailed descriptions are given in conjunction with the drawings as follows: [Embodiment] Please refer to Figure 1, which is a better flash device of the present invention. Schematic of the examples. The flash device includes a sensing unit 100, a light source processing unit 200, and a memory unit 14. The light source processing unit 200 is coupled to the sensing unit 100 ′ and the memory unit 14 is coupled. Connect the light source processing unit

Page 6 1237148 V. Description of the invention (3) 2 0 0. The sensing element includes an image sensing unit 11, an auto-focusing unit 113, and an auto-exposure unit 12. The light source processing unit has a processing unit 13 and a flash module 15. The flash module 15 provides a light source for capturing images, and the flash module 15 can provide different light intensities with a discharge time. 4 5 Ji Yi Zao Yuan 1 4 stores a comparison table between the discharge time and light intensity of the flash module 15 as shown in Figure 3. The discharge time of the flash module 15 is X1 ', which can provide Y1 light intensity. If the discharge time is X 2, it can provide Y2 light intensity, and the discharge time is Xn, it can provide γη light intensity. The comparison table depends on the hardware specifications of the flash module. The image sensing unit i j includes: a lens 111 and an image sensing element 112. The lens 111 is composed of a plurality of lenses (not shown) and has movable lenses to form lenses with different focal lengths. The autofocus unit 11 3 is used to capture a distance of a shooting subject 20 and can automatically adjust the focal length of the lens ui, so that the lens 111 can project a clear image of the shooting subject 20 on the image sensing element 11 2 Make it fully imaged. The image sensor element J 2 can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The image sensor element 112 is used in a camera. Semiconductors that record light changes and are usually measured in mega pi xe 1. In general, the number of megapixels in a camera specification refers to the resolution of the CC or CMOS, that is, the number of photosensitive elements on the CCD of this digital camera. Among them, the surface of the photosensitive element on the CCD has the ability to store charges. When the surface feels light, it will reflect the electricity% on the photosensitive element. It ’s produced by all the photosensitive elements on the entire CD.

1237148

2: 5 kinds: it becomes a complete picture, and CM0S uses N-emitting (negatively-charged) semiconductors to make them coexist with 半导体 丄 'Λ V (charged) and high-level semiconductors. Complementary effects: The stream can be interpreted as image 1 to form a complete denim. The automatic exposure unit 12 is lightly connected to: = the lens 111 measures the ambient brightness Y1, which is one of the current shooting environments. When the light A is projected by the lens 111 on the image sensing element 12 and a corresponding light signal is generated, the The exposure unit 12 judges whether or not the ambient light intensity reaches the standard brightness Y0 according to the light signal. 1 When the ambient brightness n is less than the standard degree Y0, one light quantity needs to be supplemented when calculating the image acquisition. Generally speaking, the light quantity is two illuminances. As a unit, and since the appropriate audible value X of a clear image that can be seen by human eyes is 500 illuminance, the amount of light can be known through a second predetermined calculation method, which is = χ (Υ0 —Υ1 ) / γ〇, the X is the proper brightness value and the γ〇 is the standard brightness, where the standard brightness' γ〇 " can be set as the recommended brightness value that human vision can see a clear image, but it can also be Adjust according to the needs of the user or the manufacturer, preferably 1 3 0. The processing unit 13 can obtain a discharge parameter (the discharge parameter is the light intensity supplemented by the flash module) in a first predetermined calculation method according to the distance and the light amount. Generally, the light amount is in the unit of illuminance and the illuminance and The square of the distance is inversely proportional. The first predetermined calculation method is the discharge parameter = light intensity = light quantity X distance 2. The processing unit 13 queries the comparison table in the memory unit 14 according to the discharge parameter, and obtains a discharge time. The flash module 15 turns on the flash according to the discharge time, which can make up the light and source required for image acquisition.

1237148 V. Description of the invention (5) When the flash device of the present invention operates, the image sensing unit 丨 丨 captures the daytime image of the image and the automatic exposure unit 12 measures the ambient brightness Y1 of the current shooting environment based on the image frame, The automatic exposure unit 12 determines whether the ambient brightness Y1 has reached the standard brightness Y0. When the ambient brightness γ is smaller than the standard brightness ^, the automatic exposure unit 12 calculates the amount of light to be supplemented through a second predetermined calculation method, and the autofocus unit 113 captures the "1" distance of the subject, and the processing unit 1 3 uses the first predetermined calculation method according to the light amount and the distance to multiply the light amount by the square of the distance to obtain the corresponding discharge parameter, and the processing unit 1 3 uses The comparison table can obtain the corresponding discharge time. The flash module 15 is turned on according to the discharge time to provide insufficient light source 1. For example, if the automatic exposure unit measures the ambient brightness γι 丨 丨, and The quasi-brightness Y0 is 130, and the distance of the subject 20 is 丨 · 5 meters. Through τ two predetermined calculation methods 00 (130-1 1 0) / 1 30, we can know that the light The system is “Chaoyi Degree”, and then the first predetermined calculation method 77 × 丨 · 52 can be used to know the discharge meter. The number is 173 · 25. Using the above-mentioned flash device can prevent the flash module from being full or overexposed. .

Please refer to FIG. 2 for a flowchart of a preferred implementation of the flashing method of the present invention. The flash method can be implemented in the flash device shown in FIG. 1. The light method includes the following steps: μ W Step 90: The image sensing unit 11 captures an image; Step 91. The automatic exposure unit 12 learns from the image Eye brightness;% Step 92: ,,,,, The automatic exposure unit 12 compares whether the ambient brightness is smaller than quasi-brightness. If, yes, go to step 94, and if, no, go to step 93. ^

Page 9 1237148 V. Description of the invention (6) Step 93: Do not turn on the flash module 15; away and ΓΓ :: the autofocus unit 113 captures the distance between the subject 20 and the distance: 2 exposure unit 12 via a second schedule The calculation method calculates the need to supplement: the processing unit 13 captures the distance and the amount of light to obtain a corresponding discharge parameter through the first = calculation method, and generates a corresponding discharge time according to a comparison table of the discharge parameters, wherein, the The first predetermined calculation method is the discharge parameter = light quantity × distance 2; Step 9 6 · The flash module 15 is turned on according to the discharge time to make up for a light source required for image acquisition. The above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is to say, all equal changes and modifications made in accordance with the scope of the patent application of the present invention will still be within the spirit of the present invention and not depart from the spirit and scope of the present invention, so they should be regarded as the status of the present invention. j

Page 10 1237148 Brief description of the drawings [Simplified description of the drawings] Figure 1 is a schematic diagram of a preferred embodiment of the flash device. FIG. 2 is a flowchart of a preferred embodiment of the flash method. Figure 3 is a schematic diagram of a comparison table. Drawing number description: 1 0 0-sensing unit

2 0 0-light source processing unit 11-image sensing unit I 11-lens II 2-image sensing element 113-auto focus unit 12-auto exposure unit 13-processing unit 1 4-memory unit 15-flash module step 9 0 ~ Step 9 6-Process steps of the preferred embodiment of the method

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Claims (1)

1237148 VI. Scope of patent application1. A flash device includes: an image sensing unit that can capture an image of a subject and a distance parameter; an automatic exposure unit that is coupled to the image sensing unit and Calculate a required amount of light based on the image; a processing unit 'calculates a discharge parameter based on the distance parameter and the light amount; a flash module is coupled to the processing unit and provides a shooting light source based on the discharge parameter . 2 · The flash device as described in item 1 of the patent application range, wherein the flash device further includes an auto-focus unit that can calculate the distance parameter. 3. The flashing device as described in item 1 of the scope of patent application, wherein the processing unit calculates the discharge parameter by a first predetermined calculation method, where the discharge parameter is equal to the amount of light multiplied by the distance parameter Squared 0 4. The flash device as described in item 3 of the scope of patent application, wherein the flash module generates a discharge time of one of the flash modules according to the discharge parameter and a comparison table. 5. The flash device according to item 3 of the scope of patent application, wherein the flash device further includes a memory unit for storing the comparison table. 6 · A flash method, including the following steps: A · The board is provided with an image sensing unit, an automatic exposure unit, a processing unit and a flash module. The image sensing unit can capture a distance parameter of a shooting subject , The automatic exposure unit is coupled to the image sensor Page 12 1237148 6. The scope of the patent claim ^, the processing unit can generate a discharge parameter, the flash module is connected to the processing unit; the binocular image sensing unit captures the distance parameter and the automatic exposure unit is required for different shooting One c. The unit σσ u ^ obtains a discharge parameter according to the distance parameter and the light amount; and D 亥 p ′ * • Γ The light lamp module generates a shooting light source for shooting according to the discharge parameter. . ^ The flash method described in item 6 of Shen Qing's patent scope, wherein step A-1 ^ includes step A1: the image processing unit captures 8 · such as ^ of the shooting subject and the automatic exposure unit calculates based on the image The amount of light. The flashing method described in Item 6 of the Later Ming patent, wherein the step D of the lightning discharge includes steps: generating a source according to the discharge parameter and a comparison table. At the time, the flash module provides the flashing method according to the discharge time according to item 6 of the patent claim. The image sensing unit 疋 has an auto-focus unit that can calculate the distance parameter. i0 · A flash device includes: a sensing unit that can capture an image and calculate a distance parameter and a light amount; a light source processing unit that connects the sensing unit and uses the distance parameter A light source is provided with the light quantity. 11 · The flash unit as described in the scope of the patent application, wherein the sensing unit further includes an auto-focus unit and an auto-exposure unit. Page 13 I237l48, “Shen Jingzhuan” Auto Focus Sheet 12 :: Calculate the π patent application processing unit according to the reference, and according to • If the patent application %% of the light unit can be light and the 系 0 system is 14 · If the patent application processing unit is the square of the first predetermined number. 1 5 · If the patent application processing unit is one of the rationale units 16. 6. A flashing method A. Provide a sensor to capture a distance element; β. The sensor C. The amount of light can be calculated at the light source at the light source. Range No. 1 0 According to the distance, according to the discharge range No. 1 0 According to the shadow calculation method amount = χ (ΥΟ- 一 standard bright range No. 1 2 a first preliminary The parameters described in the calculation method item and the image provided in the parameter provision item are calculated to calculate the Υ1) " 0, degree. The predetermined calculation method described in the item is to discharge the distance parameter and the flash unit of the automatic exposure unit, wherein The light amount of the light source can calculate a discharge of the shooting light source. Flash device, wherein the automatic brightness of the environment is Υ1 and by the amount of light, the second predetermined calculation of the X is an appropriate illuminance value to flash the device, wherein the light The formula calculates the discharge parameter, parameter = the light quantity X the distance parameter range described in item 14 of the light device 'where the distant light source generates the discharge time at the light source according to the discharge parameter and a comparison table. The method' includes the following Step. The measuring unit is equipped with a light source processing unit. The sensing unit can be separated from the parameters. The light source processing unit is lightly connected to the sensing unit to calculate light in accordance with the distance parameter §10. The processing unit generates a source based on the distance parameter and the amount of light. 0 1237148 6. Application for patent scope 1 7. The flashing method as described in item 16 of the patent application scope, wherein step B1 further includes step B1: the light source processing unit calculates a discharge parameter according to the distance parameter and the light amount The shooting light source is provided according to the discharge parameter. Page 15