TW200413834A - Detecting method of digital image capturing system and the digital image capturing system - Google Patents

Abstract

There is provided a detecting method of digital image capturing system, which comprises: using a photo sensor to receive data generated by illuminating a light source on a known object in the digital image capturing system, so as to detect the light source; next, analyzing the received data to decode plural feature parameters of the light source; and finally adjusting the image processing manner of the digital image capturing system based on the decoded feature parameters.

Description

V. Description of the invention (1) The technical field to which the invention belongs is particularly to propose a different one which must be adjusted or extracted from the light source special image content to directly analyze the light source automatic white balance (AWB), etc. The image system will add the data output by the known light source, and the light source intensity or full automatic exposure (AE) or auto-image system will ask the user to self-imaging the image. The present invention relates to a detection method for a digital imaging coefficient bit imaging system. ‘Previous technology Digital image acquisition systems often have a detection process because of the light source ’s physical process. At present, most digital imaging systems use imaging characteristics and then adjust them such as automatic exposure (A E) or image processing methods, but such methods are often prepared to affect the image quality. Therefore, some high-priced digital cameras use a light source (or multi-source frequency sweeping method) to effectively analyze the reflected data and the spectrum obtained from the actual image acquisition. Then, the white balance (AWB) is adjusted according to the analysis result. Image processing method. In addition, in some digital cameras, the digital line is first aligned with the reference object for correction, and then the actual shooting step is changed for better image quality. In addition, the procedure is to shoot a reference object that the designer cannot fully grasp but takes time to determine. Is it possible to order? Summary of the invention The main purpose of the present invention is to propose a detection method of a digital imaging system, which uses a light-sensing receiving light source to illuminate the digital imaging system.

200413834 V. Description of the invention (2) The information of Qiaosheng is used to detect the characteristics of the light source and directly adjust the image processing method to reduce image distortion and increase image quality. Another object of the present invention is to propose a digital image acquisition The system, like: Medium = build 7 known objects to provide external light source illumination, and then collect the shell materials in the light state. 'Apply this data directly to adjust the image processing method. This greatly reduces the system construction cost. The hunter-manufacturer Fang Dayi: The present invention provides a detection system of a digital imaging system, which uses a light sensor to receive light from a light source to illuminate data generated by a known object in the digital imaging system to extract light sources. Next, analyze the data of: to interpret the characteristic parameters of the light source. Finally, the image processing method in the digital imaging system is adjusted according to the interpreted parameters. In addition, the present invention also provides a digital image capturing system, which includes a known object, a light sensor, an analysis device, and an image processing device. Light sensor 庑 is used to receive the data generated by the light source to illuminate a known object to detect the light source: ‘The analysis device is used to analyze the data received by the light sensor to interpret the complex characteristic parameters of the light source. The image processing device adjusts the image processing method and generates image data output according to the characteristic parameters read by the analysis device. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following examples are given in conjunction with the accompanying drawings to make the details as follows: 1. The first embodiment shows the present invention Flow chart of the detection method of digital imaging system. First, the light sensor is used to detect the light source by receiving data generated by a light source to illuminate a known object in the digital imaging system (step S2). Next, divide into page 5 0790-9197TWF (nl); PT-02001; ELLEN.ptd 200413834 V. Description of the invention (3) Ϊ Funding "to interpret the characteristics of the light source (step sm). Most i, according to the The characteristic parameter adjustment of the digital image acquisition method (step Sl () 6). The square t at the image of the shirt also proposes a digital image acquisition system for implementing Figure 1 "ΐ:; 2 Figure Is a schematic diagram of an example of a digital imaging system that implements the method of Fig. 1. The digital imaging system of the present invention can be applied to digital cameras, digital cameras, cameras (PC Cams) connected to computers, surveillance cameras, mobile phones, imaging devices on PDAs, and all digital imaging systems that pass through lenses and sensors. ' Here, the application in a digital camera will be described as an example. Referring to FIG. 2, the digital image capturing system 2000 is applied to a digital camera (not shown), which includes a known object 202, a photographing device 204, a light sensor 206, an analyzing device 20 08, and an image processing device 210. The photographing device 204 includes elements such as a lens, an aperture, a shutter, and the like, and is used for photographing the scene 22 to obtain a photographed image L ′ and convert it into digital image data through a light sensor 20 6. The light sensor 206 is also used to receive the data generated by the light source 230 to illuminate a known object 2 02 to detect the light source 230. The direction of light travel is indicated by a dashed line in the figure. 0 Please note that two can also be used in a digital imaging system. A light sensor is used to achieve the function of the above-mentioned light sensor 206. One light sensor is used to photograph the scene, and the other light sensor is used to receive data generated by the light source to illuminate a known object to detect the light source. This newly added The light sensor is a cheaper or smaller sensor, please refer to the description in Figure 4. The analysis device 2 0 8 is used to analyze the data received by the light sensor 2 6 to read the complex characteristic parameters of the light source. These characteristic parameters may include the light source intensity,

200413834 V. Description of the invention (4) Light distribution, color temperature and flicker frequency of light source. The image processing device 2 J 〇 adjusts the image processing method and generates image data I according to the characteristic parameters read by the knife analysis device 2008. Output. For the detailed description of the relative positions of the known object 202 and the light sensor 2 06 in the digital camera, please refer to FIG. 4 and item 5. The system shown in Figure 2 can help us analyze the light source, such as the intensity and spectral analysis of the light source. This will greatly help the automatic exposure (AE) and automatic white balance (AWB). 々Figure 3 is a schematic diagram of an example of the detection and image acquisition process of the digital image capturing system in Figure 2. The lens, aperture, and shutter 304 are used to capture the scene 32 °. F The lens, aperture, and shutter 3G4 are used as the actual photographing device 2Q4 in FIG. 2. The source 330 irradiates the scene 32 and the uniform gray # β γ I want to shoot at the same time. Here, the uniform gray object 3 〇 is used as the second image to know the object 20 2: two: light, 30 6 Receiving light source 33. The reflection of the gray object 302 that irradiates the average sentence can be analyzed in the analysis device 308 by the light source: intensity (taken as the average value), green-red ratio (equal to the average green value / average red value) W, F Green I ratio g Β (equal to the average green value / average blue value) and the flashing frequency of the light source First marks: Interval :: Combine with strong threshold value (calculate formula for system assembly test value and reasonable exposure time or build a comparison table). In addition, the value of intensity 1 can also be obtained from the uniformity of a uniform gray object. The warmth of exposure can be used to determine the exposure time and the flicker frequency of the light source. Time is not the light source

200413834 V. Description of the invention (5) When the flickering cycle is an integral multiple of F, one by one diagonal stripes, and the objects with redundant X will be shot as off, so a preset value can be set and the flicker frequency and AC power will be set. There is a small amount of deviation in the power supply, so the "" rate will be fine-tuned with pre-adjusted value. When the actual fall is # 二 、 '贝 1 to a poor uniformity, do a little

Hz ^ ^ J ί. ^! 2〇 Frequency F is fine-tuned ’When the light source flickers: Sentence exposure Uniform exposure. When 卞 头羊 F 镟 is adjusted to the correct value, the screen will have green-to-red ratio gR and green-to-blue ratio Both are converted to R, = gR * R into a new blue value of 8 ,: B '= gB 氺 B; and a new red value R' and a new blue value B, and unchanged = Image processing 312 output to the next level (This part is not shown in the two known objects and light sensors. Figures 4 and 5 illustrate the two examples of the relative position of the digital camera in Figure 2 respectively. As shown in Figure 4, in the digital imaging system, in addition to the light sensor originally used to shoot the scene, an additional light sensor can be added to receive the light source at the same time. This newly added light sensor is cheaper or smaller. Small photoreceptor. Figure 4 is a schematic diagram of the simple structure. As shown in the figure, the object 40 2 is designed to be placed obliquely on the front of the case of the digital camera 400. In other embodiments, it is known Object 4 0 2 can be added anywhere in the organization, as long as it can b

200413834 V. Description of the invention (6) It can be irradiated by the light source (it can even be placed in the mechanism, but the optical element is added to make the light successfully shine on the known object through reflection or other optical characteristics). The known object 402 receives the light from the outside and then directly or through optical refraction into the newly added light sensor 4 06. The direction of light travel is indicated by a dotted line in the figure. It should be noted here that it must be Design a path for light to hit a known object 4 〇2 refracted to the light sensor 406, so that the light sensor 406 can properly receive a light source similar to the framing and prevent unknown objects 4 〇2 from reflecting this light source Of stimulation. In addition to the addition of a light sensor to receive image acquisition data and known object data at the same time to achieve the purpose, it is also possible to obtain two types of data in a time-sharing manner using the same light sensor. It can be assumed that the light source has not changed in a short period of time. At this time, it is only necessary to rotate or move the sensor or other devices according to time, so that the sensor can sense optical data from different sources at different times. In addition, in addition to the above method, another alternative embodiment is provided, placing a known object in front of the lens, and then mechanically switching whether to block the shooting scene according to time, so that the same light sensor can obtain two kinds of data. Figure 5 is a simple diagram of the architecture. As shown in the figure, it is known that the object 502 is directly in front of the digital imaging system 50 0, and then mechanically switches whether or not it blocks the shooting scene 5 0 according to time, so that the digital acquisition Guangwei in the system like 500 should cry for 5 06 to get two kinds of information. The heart-suppressing light sensor can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) device. When the light sensor is a charge coupled device (CCD), it can be cut into two parts on a charge coupled device (CCD) to

0790-9197TWF (nl); PT-02001; ELLEN.ptd Page 9 200413834 V. Description of the invention (7) The method of learning allows them to separately sense different stimuli, some of which are the results of sensing the exposure of known objects The other part senses the image data coming from the lens to achieve the purpose of receiving image data and known object data at the same time. The structure of this method is roughly shown in Figure 4 and Figure 5. To sum up, the detection method of the digital image capturing system of the present invention and the digital image capturing system implementing the method utilize a light sensor to receive data generated by a light source to illuminate a known object in the digital image capturing system to detect Light source characteristics, and directly apply this data to adjust the image processing method to achieve the purpose of reducing image distortion, increasing image quality, and greatly reducing system construction costs. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The guaranteed range shall be determined by the scope of the attached patent application. '°

0790-9197TWF (nl); PT-02001; ELLEN.ptd Page 10 200413834 Brief Description of Drawings Figure 1 is a flowchart showing the predicate measurement method of the digital image capturing system of the present invention. Fig. 2 is a schematic diagram showing an example of a digital imaging system that does not implement the method of Fig. 1. Fig. 3 is a schematic diagram showing an example of the digital imaging system of Fig. 2 performing the measurement and acquisition process. Fig. 4 is a schematic diagram showing an example of relative positions of the known object and the light sensor in the digital camera in Fig. 2; Fig. 5 is a schematic diagram showing another example of the relative positions of the known object and the light sensor in the digital camera in Fig. 2; Explanation of symbols: 2 0 0, 5 0 0 ~ digital image acquisition system; 202, 402, 502 ~ known objects; 20 4 ~ photographing device; 2 0 6, 30 6, 40 6, 5 0 6 ~ light sensor; 20 8, 30 8 ~ analysis device; 2 1 0, 3 1 0 ~ image processing device; 220, 320, 520 ~ scene; 2 3 0, 3 3 0 ~ light source; 302 ~ uniform gray object, 3 0 4 ~ lens , Aperture and shutter; 3 1 2 ~ other image processing; 4 0 0 ~ digital camera;

Ii ~ shooting image;

0790-9197TWF (η1); PT-02001; ELLEN.ptd Page 11 200413834 The diagram briefly illustrates I. ~ Image data; I ~ Intensity; gR ~ Green-red ratio; gB ~ Green-blue ratio; F ~ Light source flicker frequency. ill0790-9197TWF (nl); PT-02001; ELLEN.ptd page 12

Claims (1)

200413834 6. Scope of patent application 1. A kind of data produced by a known object Analyze and receive According to the interpretation Processing method. 2. If you apply for a method, it also includes the following characteristics of the data taken from the image sensor sensor. The following steps use a photographing device, image; Method, and light 5. Method, 6. If the light image is applied to the sensor, the sensor processing is applied. The patent scope further includes the following steps: using a photographing device, and applying a second light sensor to perform the image application, wherein the source flash is applied, and the image processing is performed. The patent scope describes the characteristic reference frequency. Patent range The patented unified detection method of the light sensor includes the following steps: receiving a light source and illuminating one of the digital imaging system to detect the light source; interpreting the complex characteristic parameters of the light source; and parameter adjusting the digital acquisition The detection of the digital imaging system described in item 1 of the image system is used to capture a scene to obtain a shot. The shot image is a digital image. The monk of the digital imaging system described in item 1 The number used in the digital imaging system described in item 1 of the digital image includes the intensity of the light source, the spectral score, 叩, and the color temperature as described in item 1. The digital imaging system is a charge consumable element (CCD). , / J of the digital imaging system described in item 1 0790-9197TWF (nl); PT-02001; ELLEN.ptd page 13 200413834 Metal Oxide Semiconductor (CMOS) Yuan 6. Method for applying patent scope, wherein the photo sensor is a complementary part 0 7 · As described in the first scope of the patent application scope, +, > &, ^ ^., A detection method of a digital imaging system, in which the steps of analyzing the above negative materials in addition to the green color ^^ a. ^ The value of the characteristic parameters of the fresh light source further include the use of software, hardware, or knowledge. The body analyzes the above data to interpret the characteristic parameters of the light source. ,, 8. The detection method of the digital image capturing system as described in item 1 of the scope of patent application, wherein the image processing is an automatic exposure (AE) mechanism. 9. The detection method of the digital image capturing system as described in item 1 of the Chinese patent, wherein the image processing is an automatic white balance (AWB) mechanism. I 0 · The detection method of the digital image capturing system as described in item 丨 of the patent claim, wherein the side image processing is an anti-light source flicker mechanism. II · A digital image capturing system, comprising: a known object; a light sensor 'for receiving data generated by a light source to illuminate the known object to detect the light source; an analysis device' for analyzing the light sensor The data received by the processor is used to interpret the complex characteristic parameters of the light source; and an image processing split is performed to adjust the image processing method and generate an image data output according to the characteristic parameters read by the analysis device. 12 · The digital image capturing system described in item 11 of the scope of patent application, further comprising a photographing device for photographing a scene to obtain a photographed image. 0790-9197TWF (nl); PT-02001; ELLEN.ptd 1 3 · The digital image capturing system described in item 12 of the patent application scope, wherein the light sensor is used to receive the captured image and pass through the light sensor Go to 200413834 6. The scope of patent application is to change the shooting silly & to do ~ 1 horse and a digital image data.勹 1j · The digital image capturing system described in item 12 of the patent application scope further includes two second light sensors for receiving the captured image and converting the captured image to _ by the first light sensor Digital image data. 15 · The digital image capturing system as described in item 11 of the scope of patent application, wherein the above characteristic parameters include the intensity of the light source, the spectral distribution, the color temperature, and the flicker frequency of the light source. 16 · The photo sensor in the digital image capturing system described in item 11 of the patent application scope is a charge coupled device (CCD). 1 7 · As in the digital imaging system described in item 11 of the patent application scope, the light sensor is a complementary metal oxide semiconductor (CM0s) element < 1 8 · As in the patent application scope item 11 The digital imaging system acupoint remote analysis device uses software, hardware, or carcass to analyze the above data to solve the characteristic parameters of the remote light source. 19 · The digital image capturing system described in item 11 of the scope of patent application, wherein the image processing is an automatic exposure (A e) mechanism. 2 0. The detection method of the digital image capturing system according to item 11 of the scope of patent application, wherein the image processing is an automatic white balance (AWB) mechanism. 2 1 · The digital image capturing system described in item 丨 丨 of the patent application scope, wherein the image processing is an anti-light source flicker mechanism. 0790-9197TWF (η1); PT-02001; ELLEN.p t d p. 15