TWI240138B - Method for judging light source applied in digital image electronic products - Google Patents

Abstract

The present invention relates to a method for judging light source applied in a digital image electronic product. The method is used for deciding whether to adjust shutter speed according to the environment of the digital electronic product. The method comprises the steps of: calculating the display time needed by each horizontal pixel by multiplication of the reciprocal of a predetermined horizontal pixel amount and frame rate of the digital electronic product; calculating the blink frequency by a power frequency; setting a variable X representing the interval of the blink of horizontal pixel and calculating it by the proportional relationship between X and the blink frequency; sampling Y value (Y cbcr) of a vertical line and judging whether it meets the condition of indoor light source by a formula. By the above steps, under multiple indoor light sources, if the multiple indoor light sources compensate for each other, the light source of a digital camera can still be determined as an outdoor light source and the shutter speed does not need to be decreased. On the contrary, when the indoor light source is seriously blinked, the judgment will be an indoor light source and the shutter speed has to be increased to prevent the image from containing blink lines.

Description

1240138 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a field ^ & cut-off *, in particular-a method for determining the shutter speed of a digital camera using a light source: = Judging the origin of the situation, the decision [first as technology] know ^ 'the production of digital images, cameras and digital cameras as the representative and child power development, especially the digital phase # / ^ Become the digital image of the South Gate? 1 vy has a polar jar and convenience. Because users can instantly produce digital images on digital video electronics: < Digital like images, when the time is dry, the liquid production of 〇〇 on the daily display device to do the shop mouth Two r: Generally, the camera must deliver the negative film (2). It has the special feature of saving costs: knowing the quality of the captured image. For the expense of 2 media traditional cameras need to purchase negatives. At this time, the negatives must be delivered to the processing shop to wash the eroded soil, and then pay the negatives for the film development and photo output. Because of negatives: ^ See I photographed the results myself, and only only took pictures-Volume II can reach a spectrum of hundreds of yuan. The digital camera C is stored in the computer's storage medium (such as: hard disks, CD-ROMs, etc.), etc., seeing your own shooting images requires almost no cost. 3)::,, Learn the effect of photography: because the cost of taking digital images is very low (only the cost of battery power and sufficient records are consumed) Page 6 1240138

Memory (card) for storing images), so users can rest assured to shoot images, and can adjust and adjust various settings such as shutter, aperture size, white balance, and exposure compensation to find the best shooting parameters, which can be used The experience gained by photographers will help the rapid growth of photography technology. (4) It has excellent image post-production characteristics. After being unable to develop and retrieve photos by yourself, it is found that there is a defect and only silently accepts poor shooting. This mode can not only make the image processing software more timely but also transparent. 'And make the photos perfectly approach the pieces' more fun for special images. : Taking pictures with a traditional camera, because the system adjusts the picture, so the photo of the self-developing shop cannot be remedied by itself, but the digital camera changes the quality of the captured image, and the post-processing of the image is seen by the user The effect of the photographic object 'adds one of the products with the above-mentioned door for shooting digital factor digital images, and also attracts more structures and matching sheets of digital cameras. The flicker phenomenon of indoor light sources has a great influence on it, and the indoor net's due to one of the power frequency frequencies around the world, which means that the waveform period of the power source waveform determines the flash time of the indoor light source. The flickering light source may cause advantages, and Became the hottest manufacturer in the electronics market to invest in research and development products, so the number of patents for application software has rapidly expanded to digital imaging electronics. The light sources of the cameras are fluorescent lamps and tungsten lamps ... Almost all of them are 50 Hz and 60 Hz. The cycle is 1/50 or 1/60 seconds, and this flicker cycle, so the subject in the shooting indoor image shows different areas of light and dark

Page 7 1240138 V. Description of the invention (3) The difference of ___ 'causes unsightly and bad digital images, and to cope with this phenomenon, designing a digital image electronic production port in + X months will be grams α ^ Dingzuokou When the phenomenon of 氺 ,, / 5 _ is too serious, you can adjust the shutter speed of Xiao Xianyuan's flicker to get better image quality: * except the bright and dark areas of the shirt [Content of the Invention] Based on solving the above-mentioned habits Due to the lack of know-how, the method for determining the light source of digital imaging electronics is a method that should be used to determine the shooting environment of digital imaging electronics. The purpose of $ is to make the phenomenon of flickering of the light source of the imaging electronics in the room too much. , Adjust the image quality by setting the shutter speed to eliminate the β of the light and dark areas of the image. On the left, the best method is used to achieve the above method. Using a digital frame rate, multiply it by: ^ — the ratio of the mouth of the Guipinzi product to obtain each level of the book (the level of the day) The reciprocal of the total number of primes, the time required to display it with an electric x; set-algebra x / flicker frequency of the indoor light source; algebra X, to indicate the interval several times, and using the value of x, i K, the prime will blink A * (, " shows: need to be r and horizontal day = a fixed flashing frequency (X value) the X value; a straight line Y value (Y cb cr); and sampling in the denier plane A judgment formula is used to determine the conditions of the first indoor light source; whether the gamma value of ",,, jin," and "members" is in compliance with the above steps. In the case of multiple indoor light sources, if the multiple room 1240138

The internal light source reaches $ 士 d # When the source judgment is displayed as one :: the phenomenon of flicker can still make the digital camera capture light; otherwise, if I = i light source, it is necessary to judge the source without reducing the shutter speed. ^ When the flickering phenomenon of the stem A is serious, the light of the digital camera is fast to avoid ::: ~~ indoor light source, and the shutter speed must be increased to capture the picture with flickering lines. The diagram and figure number :: The invention has a more in-depth explanation, which is based on the following map investigation work :: Detailed description, Ji Neng " Review Committee in the review [Implement the relationship, please the waveform system is 60 rectifier Please refer to the following figure to explain the detailed structure of the present invention and its connection to facilitate your understanding of the review committee. "," &Quot; Please refer to Figure 1. It is a waveform diagram of indoor AC power, which is an indoor power supply, which presents an AC full wave waveform, and its frequency is Hz. Please refer to Figure 2 again, after the waveform of Figure 1 passes a half wave, The frequency is doubled, and the period is halved. Figure 20 (see Figure 3) is a schematic image of the subject showing different areas of light and dark. The frequency of the power source itself determines the frequency of the indoor light source. The flicker cycle, so the light source that flickers in the shooting room may cause the subject to appear in different areas (the area 2 and the dark area 3 are staggered), resulting in unsightly and out of place images From the disclosure of Figures 1 to 3 above, the electricity provided by our country at present

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The UZi force frequency is 60 ______ _ _τ- vx (Frame Rate) is 1/2 0, how many pictures can be played by the 桢 ratio 俜 position camera 桢 ratio, the digital camera mentioned r picture per second ... ", The following judgments can be derived == (I) using the ratio of a digital image electronic product (Frame to

Rate), multiplied by the reciprocal of the total number of horizontal diurnal elements of the predetermined diurnal plane, to obtain the 1/20 * 1 / 480-1 / 9600 (II) utilization required for the horizontal diurnal (pixel) display of the bar. Find the flash of the indoor light source 1/6 0 * 1/2 (half-wave rectification) = 1 /; [2 0, (III) setting-algebra X 'to indicate that several horizontal pixels will flash once, and Using the ratio of the X value to the flicker frequency of the indoor light source and the time required to display the horizontal pixel (pixel), find the X value 43: X 氺 1/9600 = 1/1 20 to get X = 80 (IV) After the fixed flicker frequency (x value) is calculated, a vertical straight line Y value (γ cb cr) 44 is sampled in the picture. (V) Then use a judgment formula to determine whether the value of γ displayed by the vertical straight line meets the condition 45 of a human indoor light source. The comparison of the judgment formula is to use the X value obtained in step (Π I) in the figure. The disclosed rectified waveform samples a complete waveform period 1 and uses the period value to compare with the waveform preset by the digital imaging electronics _

MmnSh Page 10 1240138 V. Description of the invention (6) Compared with the preset waveform, it is an indoor light source; otherwise, it is an outdoor light source. Using the above five steps, in the case of multiple indoor light sources, if the multiple indoor light sources achieve mutual compensation of flicker, the light source of the digital camera can still be judged to be displayed as an outdoor light source without reducing the shutter speed. On the other hand, if the flickering of the indoor light source is serious, the light source of the digital camera will judge it to be displayed as an indoor light source, and the shutter speed must be increased (adjusted to a multiple of η / 1 20) to avoid flickering The picture of the line. From the above disclosure, it can be understood that the method of the present invention can quickly determine the type of light source of the shooting environment, and has no calculation formula without causing a burden on the central processing element (only a comparison with a preset waveform), That is to say, the digital image electronic products can achieve the purpose of quickly determining the light source, and effectively avoid the images with different brightness when shooting indoors. In summary, the structural features and various embodiments of the present invention have been disclosed in detail, and it can fully show that the present invention is rich in implementation in terms of purpose and efficacy, and has great industrial use value. And it is currently unavailable on the market = according to the spirit of the patent law, the present invention is completely in line with the inventor's' only a preferred embodiment of the present invention, when this month is limited The scope of the implementation of the brake rm ~ a, that is, all changes and modifications that are specifically applied for in accordance with the present invention, should still fall within the scope of the motorcycle covered by the patent of the present invention. Call your reviewer Ming Jian, and pray for the best

! 24〇l38 Simple description of the diagram [Simplified description of the diagram] Figure 1 is a waveform diagram of indoor AC power. Wave = ΐ is the intent generated by the current parent rectified by a fluorescent lamp rectifier. Figure 3 is a block diagram of the image showing the difference between the light and dark areas of the subject. Figure 4 is the step diagram of the environment light source for this case Number description: 1, 2, 3, 41 Waveform bright area Dark area-Use a digital image electronics product multiplied by the predetermined horizontal level of the total horizontal pixels = Frame Rate, flat pixels (pixel) display V needs ^ The reciprocal of the number to obtain 42 ~ utilization-electricity frequency of each piece of water to find the room day and time 43 ~ set-algebra X to indicate the interval first; the original frequency of blinking and the use of the value of χ and the aforementioned I horizontal pixels will flicker. A pixel (Pixel) display is required. The proportional relationship between the flicker frequency of the light source and the time of the X value. Calculate 44 to obtain a fixed flicker frequency (χ 45 a vertical straight line γ After the value (γ cb cr), then take a sample in the screen and use a judgment formula to determine whether the * value is consistent with the value displayed in the condition hall of the indoor light source.

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Claims (1)

1240138 6. Scope of patent application — i. A method for judging the light source of digital imaging electronic products. The main point of the digital imaging electronics is to determine the shooting environment, which is = indoor light source, to determine the macro Η τ Λ, soil — 疋 Φ In order to determine whether the shutter speed is adjusted as follows, the judgment step is to use the ratio of the image of an electronic product (Frame multiplied by the reciprocal of the total number of horizontal pixels of the predetermined picture to determine pf denier ( ΓΜ · VA 1 "-η 士 ββ · ^ Rat… ~ the number of horizontal pixels returned > the time required for each horizontal day (p 丨 xe 丨) display; t! = Power frequency to find The flicker frequency of indoor light sources; sighed algebra X one by one to indicate that a few horizontal pixels will flicker flat = go and use the x value with the flicker frequency of the indoor light source and the pixel value (Pixel) to display The proportional relationship of the required time, after obtaining the fixed X flicker frequency (X value), then the Y value (γ cb cr) of a vertical straight line is displayed on the screen φ; and-judged by a judgment formula The γ value displayed by the vertical straight line is the indoor light.的 古 付 • $: 凊 One of the methods described in patent fanyuan applied to digital imagery ϊ ϊ ϊ 方法 方法 方法 break method 'where the flicker frequency of the indoor light source is calculated by 3 and the reciprocal of the frequency of your power supply It can be obtained at 1/2. • ^: Please refer to the method for determining the light source of digital imaging electronics w described in item 2 of the patent scope, where 1/2 of the above formula is indoor power. After rectification, it is 1/2 of the original full waveform, and it is obtained. • =: Please refer to the method for determining the light source for digital image electronics described in the first item of the patent scope, where the X value is the same as the flash of the indoor light source. Surface RIH1 Page 13 1240138 VI. The scope of the patent application range of the flicker frequency and the time required to display the horizontal daylight (pi xe 1) is: The time required to display the time is not required) X * (horizontal daylight (pixel internal light source) (The flicker frequency). 5. As described in item 1 of the scope of patent application, a light source judgment method applied to digital imaging electronic products, wherein the comparison of the judgment formula is after rectifying an X value with an indoor light source. The generated waveform samples a cycle value of a complete waveform and compares the cycle value with a preset waveform of digital image electronic split-analysis and comparison. # Is the indoor light source that matches the preset waveform date ^, otherwise, If not, it is an outdoor light source. 6. A light source judgment method applied to digital imaging electronics and is mainly used to judge digital imaging electronics. The shooting environment is a room source, and whether 0 is to be improved The shutter speed is as follows: ·, w, work name ~ Chebihan Urame multiplied by the predetermined written water and half gold to pixels ... Λ thousand. Λ reciprocal of the total number, in order to count for agricultural use Imaging power Kate) Wei Qu ---------- Every horizontal gate (pi xe 丨) required for display of each horizontal gate · Two frequencies to find the V flicker frequency of the indoor light source; α, Algebra χ, to indicate that several horizontal pixels are spaced, that is, 4 is called once, and the X value is used to pan, 'PS flicker ^. R.] A value and the flicker frequency of the indoor light source and pico prime p) Display the proportional relationship of the required time, find the value, and σ to calculate the fixed flicker frequency (the value of Υ of the m-line (0 c Y Cr Cr); later and then take 124〇138 in the-plane, apply The scope of the patent uses a judgment formula to determine the conditions of the indoor light source displayed by the silk straight line; the value of y is not true ^ Using the above steps, in the case of multiple indoor light sources, it is greedy ^: the light sources can compensate for the flicker phenomenon. At the same time, you can still make the number: evening f :: shooting; on the contrary, if the room ~ the flash of the light source is 7 · such as to avoid shooting with flashing lines of the picture. One of the items described in the scope of patent application 6 is applied to digital Image electric light source judgment method, in which the flicker frequency of the indoor light source is calculated as 8 females / system power frequency It can be obtained by multiplying the reciprocal by 1/2. • σ: Please apply one of the methods described in item 7 of the patent scope to digital image electronics. Judging method 'where 1/2 in the above formula is indoor power 9 · 如 申 ί 波After f is adjusted, it is 1/2 of the original full waveform, and it is obtained. A method for determining a light source applied to digital image electronics as described in item 6 of the patent, wherein the X value is the same as the flash of the indoor light source ^ The ratio of the time required to display the horizontal pixel (pixel) X * (the time required to display the horizontal pixel (Dixel)) = (the flicker frequency of the indoor light source) 1 0 A method for determining a light source applied to a digital imaging electronic product described in the above item, wherein the comparison of the judgment type is to sample a waveform value of an entire waveform by rectifying an Xjii 'with an indoor light source rectification. Electron with the period value and digital image ΜΜ page 15 1240138 Page 16