103results about How to "Moderate brightness" patented technology

The invention provides a luminous flux control method of a high definition vehicle snapshot system, belonging to the image processing field. The control method comprises the following steps: initializing the parameters of a camera, setting an initial photometric range and a photometric luminance reference value table; obtaining the current shutter speed value, gain value, reference datum value and current photometric interval of the camera; determining the photometric range of an acquired image; calculating photometric luminance value in the designated area of the photometric range; calculating the luminous flux control parameter; sending a control command, waiting in the designated photometric interval, and performing the next adjustment process. The method automatically adjusts the shutter and gain of the acquisition equipment and adjusts the light complement equipment according to the photometric result of a special area so that the pictures shot at any moment have proper exposure luminance, the problem that the exposure effects of the plate number and portraits in a vehicle on the traditional image are not consistent is solved; and the control method can be realized in the embedded system, thus the combination control of multiple devices becomes easy.

The invention discloses a structured light self-adapting repeated multi-exposure method in the three-dimensional measuring field. The quality parameters of shot structured light pattern images are used for automatically confirming the exposure time next shooting and judging when shooting is to finish. The concrete method comprises the steps of calculating the quality parameter value of positions on the structured light pattern images, using the quality parameter value of the positions on the structured light pattern images to judge whether the positions reach ideal exposure quality and confirm the exposure time of the next shooting, judging whether shooting finishes through the pixel proportion of the low quality parameters of patterns, and finally conducting data splicing on images of high quality parameters in different exposure time. The method effectively avoids interference of complex conditions of the surface of welding seams on the structured light pattern images, and obtains structured light pattern images which are clear and reliable and do not lack local data so as to improve the accuracy and the stability of three-dimension measurements.

The invention provides a high dynamic range image shooting method and a high-dynamic-range image shooting device. The method comprises the following steps of: using a first camera for measuring lightof a shooting area to obtain a target normal exposure value, according to the target normal exposure value and the scene information of the shooting area, determining a first underexposure exposure value and a first overexposure exposure value, using a second camera to measure the light of the too dark area of the shooting area; obtaining a second under-exposure exposure value; using a third camera to measure the light of the over-bright area of the shooting area; obtaining a second overexposure exposure value, correcting the first overexposure exposure value based on the second overexposure exposure value to generate an overexposure correction value, correcting the first overexposure exposure value based on the second overexposure exposure value to generate an overexposure correction value, and shooting a shooting area according to the overexposure correction value, the target normal exposure value and the overexposure correction value to generate a high-dynamic-range image. Accordingto the invention, the obtained high-dynamic-range image is moderate in overall brightness and accurate in tone relation.

The invention discloses a metal surface defect image recognition non-destructive testing device and method, and relates to the field of automatic metal surface defect testing. The device comprises a mobile unit, a light sensation unit, a light source unit, an optical amplification unit, an image acquisition unit, an image analysis unit, a data storage unit and an alarm unit, wherein the light sensation unit and the light source unit ensure suitable brightness of an acquired image in a tested area, the optical amplification unit is used for optically amplifying the acquired image, the image acquisition unit acquires the image, the image analysis unit analyzes the acquired image in the tested area and judges whether defects exist or not, the data storage unit stores data needed by running ofthe device, the acquired image and analysis results, and the alarm unit gives an alarm for a tested problem area. Metal surfaces can be full-automatically tested, the tested area is large, the testing method is simple and rapid, and testing time and labor cost are reduced.

The invention discloses a method for eliminating cloud and haze of an atmospheric degraded image. The method comprises the steps of the acquisition of a dark channel image and mid-value filtering, the self-adaptive degradation and acquisition of an atmospheric light image, the detailing of an atmospheric transmission function and the visual correction of a color domain. The atmospheric degraded image to be processed by the method has the problems of different illumination intensities, contrast ratios and dynamic ranges, a dark channel theory model is adopted, and the mid-value filtering of the dark channel image, the self-adaptive degradation and acquisition of the atmospheric light image and the visual correction of the color domain are also combined to eliminate the cloud and haze, and the disadvantages in the prior art are overcome. Besides, the method for eliminating the cloud and haze of the atmospheric degraded image is simple to operate and has good application prospect.

The invention provides a method for regulating screen brightness. The method includes the steps that a light collecting unit collects ambient light intensity and outputs voltage signals at intervals according to the light intensity; a core processing unit receives consistent voltage signals continuously, obtains a voltage value corresponding to current screen brightness according to a corresponding relation of the screen brightness stored by a storage unit with voltage values and the current screen brightness, compares the voltage signals with the voltage value, and controls a screen managing unit to increase or reduce the screen brightness if the signals are larger or smaller than the voltage value; and the first step is repeated from. According to the method for regulating the screen brightness, the screen brightness can be regulated according to the light intensity of the environment, suitable brightness can be guaranteed when a user is watching the screen, good definition of the screen is provided, watching requirements are satisfied, large amount of electric energy can be saved simultaneously, and the method is applicable to electronic devices, particularly mobile electronic devices.

The invention provides a light-adaptive biological metering information collection device, and the device comprises a light-emitting unit which is used for emitting infrared rays to a blocking object, wherein the intensity of the infrared ray emitted by the light-emitting unit can be adjusted; a sensing unit which is used for sensing the infrared rays reflected by the blocking object, and forming an image of the blocking object according to the sensed infrared rays; a brightness analysis unit which is used for extracting the brightness of the image, and analyzing whether the brightness is within a recognizable brightness range or not; and a light supplement adjustment unit which is used for reducing the light intensity of the light-emitting unit when the obtained image brightness exceeds the upper limit of the recognizable brightness range, or else, increasing the light intensity of the light-emitting unit till the image with the brightness being within the recognizable brightness range is obtained. The device can directly extract the brightness of the collected image, adjusts the light of a light source more visually according to the extraction result, and is higher in resolution of the obtained image.

The invention discloses an illumination normalization method for processing face images. The illumination normalization method includes steps of reading face images to be processed and taking logarithm of the face images to be processed; computing images of a shadow layer; computing images of a reflecting layer and performing exponential transformation; selecting sample images and computing a histogram of the sample images; normalizing the images of the reflecting layer by a histogram matching method to obtain the images of the to-be-processed face images corrected by the illumination normalization method. By an edge-preserving filter, feature information on a large-scale layer can be kept. By adopting the sample images in the optimum vision area, mean value and variance of the corrected images of the reflecting layer can be kept in the optimum vision area, a subsequent face identification system is facilitated, accuracy in face identification can be improved, and the problem that the feature information is greatly lost to cause disadvantages to subsequent face identification during face identification in existing illumination invariant feature extracting method is solved.

The embodiment of the invention discloses a camera exposure processing method and device and an intelligent terminal, and the method comprises the steps: detecting the brightness of a current environment through a brightness sensor, and obtaining the brightness value of the current environment; obtaining the grade of the current actual environment according to the obtained brightness value of thecurrent environment; when the grade of the current actual environment is a preset environment darkness grade, controlling to search an exposure coefficient sensitivity gain table corresponding to theenvironment darkness grade, and confirming a corresponding exposure parameter; and dynamically adjusting exposure according to the exposure parameters of the lookup table, and controlling to output anexposure picture with corresponding brightness. According to the invention, the current environment state is correctly judged by adding judgment on the brightness of the environment light, and then the current environment state enters the low-illumination exposure system to carry out more appropriate exposure control, so that the brightness in a picture is appropriate under the condition of low illumination, such as weak light or light turn-off; therefore, a user can see a picture with proper brightness under the condition of weak light or light turn-off.

The invention relates to the technical field of image processing, and particularly relates to an exposure control method and an exposure control system based on two cameras. The method comprises the following steps of: according to conditions of a target image region, determining an exposure weight of a first camera module to a first target image and the exposure weight of a second camera module to a second target image; according to a preset brightness value, controlling and adjusting lighting quantity of the first camera module and/or the second camera module, thereby making exposure brightness values of the first target image and the second target image both meet a preset brightness value range. Thus, the scheme can control exposure degree of regions of each part on corresponding target image, consequently makes each region part on the corresponding target image have relatively appropriate brightness, and further makes an image generated finally through superposing have relatively high quality, therefore, chase for high-quality images of users is satisfied, and usage experience degree of the users is improved.

The invention relates to a liquid crystal display panel. The liquid crystal display panel comprises a backlight source, a selective reflecting film, a first liquid crystal box and a second liquid crystal box, and the first liquid crystal box comprises a first substrate and a second substrate which are oppositely arranged and a first liquid crystal layer located between the first substrate and thesecond substrate; the second liquid crystal box comprises a third substrate and a fourth substrate which are oppositely arranged and a second liquid crystal layer located between the third substrate and the fourth substrate, the third substrate is arranged close to the second substrate, and the third substrate is arranged on the side, away from the first liquid crystal layer, of the second substrate; the selective reflecting film is used for reflecting the light incident from one side of the second liquid crystal box and transmitting the light emitted from the backlight source, wherein when liquid crystal molecules in the first liquid crystal layer lie flat, the liquid crystal display panel is in a transmission pattern, and when the liquid crystal molecules in the first liquid crystal layer stand, the liquid crystal display panel is in a reflection pattern. The invention further relates to a liquid crystal display device.

The invention relates to an image fusion method for a dome screen system. The image fusion method for a dome screen system is characterized by determining the projection area of each projector by means of a mesh model of the dome screen body so as to enable each projector to have adjustability for the projection position; performing edge fusion on each projection area by means of polar coordinatesgeometrical correction processing, so as to enable the projection area image at different position and in different size to achieve the effect of accurate splicing; and respectively performing colorcalibration of the projectors and fusion band blanking operation of projection images by means of unified color processing and light leakage compensation processing, thus effectively avoiding color variation and luminance variation between each edge fusion image. By means of the steps provided by the image fusion method for a dome screen system, the stereo projection image on the dome screen bodycan achieve the display effect of complete frames, unified color and suitable luminance, and comfortable and perfect film watching experience can be brought to spectators. The image fusion device employing the image fusion method for a dome screen system can generate a standard fusion image with better display effect, and the dome screen system employing the image fusion method can have excellentprojection effect and can improve the film watching experience of spectators.

The invention discloses an automatic adjusting method for imaging parameters of a remote sensing camera and relates to the technical field of imaging of remote sensing cameras. The method comprises the following steps: acquiring shooting time of shooting a target area and a geometric position of the target area, and determining solar altitude during shooting according to the geometric position andthe shooting time; based on a global ground surface coverage data set, determining the ground surface type contained in the target area according to the geometric position, and determining the groundreflectivity of the target area according to the ground surface type contained in the target area and a preset reflectivity model, wherein the reflectivity model comprises the ground reflectivity ofall ground surface types of the earth; and determining the imaging parameters according to the solar altitude and the ground reflectivity. The automatic adjusting method for the imaging parameters ofthe remote sensing camera provided by the invention achieves automatic adjustment of imaging parameters of the remote sensing camera.

The invention discloses a method and a system for generating sinusoidal structured light. The system comprises a light path formed by a micro galvanometer, a two-sided lens and a laser arranged sequentially and a control circuit formed by a micro galvanometer driving module, a laser driving module, an FPGA module, an ARM module, a micro galvanometer feedback module and a laser feedback module, wherein the micro galvanometer driving module is in control connection with the micro galvanometer; the laser driving module is in control connection with the laser; the FPGA module is connected with the ARM module; the micro galvanometer driving module and the laser driving module are connected with the FPGA module respectively; and the micro galvanometer feedback module and the laser feedback module are connected with the ARM module respectively. The LD laser and the MEMS micro galvanometer can be monitored and modulated in real time, a clear and stable sinusoidal structured light laser grating with proper brightness can be obtained, modulation can be carried out according to different phases of different frequencies to complete three-dimensional reconstruction of a measured object, and good application is realized in structured light scanning and 3D modeling processes.

The invention discloses a substation equipment image collection method based on focusing and exposure servo of a specified area. The method comprises the following steps: collecting a clear image of substation equipment and storing the clear image as template data; when a substation polling robot executes a polling task and removes to a preset position, collecting a polling image of concerned equipment by a camera; registering the template image and the polling image collected onsite by using a feature matching algorithm to find a concerned equipment area in the center of the polling image; and calculating clarity values of the equipment area in the polling image and the template image, comparing a ratio of the two clarity values with a set threshold, if the ratio is smaller than the threshold, deeming that the equipment area in the polling image is not clear enough, and if the ratio is greater than the threshold, deeming that the equipment area in the polling image is clear enough. According to the substation equipment image collection method disclosed by the invention, a specified area focusing servo function is adopted on the image area where the equipment is located, so that a camera focusing position can be guaranteed to locate on the equipment, and a clear image of the equipment is collected so as to ensure the accuracy of reading or state identification of the equipment.

The invention discloses an image rapid defogging method and a device, a terminal and a storage medium, and the method comprises the steps: dividing an original foggy image into a sky region and a non-sky region through a sky region recognition algorithm; performing CLAHE enhancement on the sky region through a CLAHE enhancement algorithm to obtain a defogged image of the sky region; through an improved dark channel theory, firstly performing dark primary color enhancement and CLAHE enhancement on a non-sky area, then taking the mean value of the dark primary color enhancement and the CLAHE enhancement to enhance the contrast ratio and the brightness, and a defogged image of the non-sky area is obtained; and performing defogging restoration processing on the defogged image of the sky area and the defogged image of the non-sky area to obtain a defogged image corresponding to the original foggy image. According to the method, the problem of sky area failure in the prior art can be effectively avoided, the problems of sorting and cyclic traversal in the atmospheric light value calculation process are reduced, implementation of an algorithm on hardware is facilitated, and meanwhile theeffects of appropriate brightness, obvious details, overall image balance and color distortion prevention can be achieved.

The embodiment of the invention provides image acquisition equipment, an equipment control method and device, and a storage medium, and the equipment comprises a processor, an infrared lamp, and a white light lamp. The processor is used for acquiring current acquisition parameters, wherein the current acquisition parameters comprise multiplying power, ambient brightness and gain information; the processor is further used for determining the size relation between the multiplying power and a preset first threshold value and a preset second threshold value, controlling the on-off states of the infrared lamp and the white light lamp according to the size relationship between the multiplying power and the first threshold value and the second threshold value, and the ambient brightness and the gain information, wherein the first threshold value is smaller than or equal to the second threshold value. According to the embodiment of the invention, a light source can be provided through the white light lamp and the infrared lamp, moderate brightness of the environment where the image acquisition equipment is located is ensured, and the quality of images acquired by the image acquisition equipment is improved.

The invention discloses dynamic egg image acquisition equipment which is used for continuously acquiring egg images in a production line. The equipment is composed of an egg conveying device, a high-speed industrial camera, a light source, a near-infrared in-place switch, a near-infrared correlation switch, a relay control panel, a camera obscura and a computer. The egg dynamic image acquisition equipment disclosed by the invention can be used continuously dynamically acquire the egg images, and the reliable image acquisition equipment is provided for online egg quality detection based on computer vision.