296results about How to "Improve defogging effect" patented technology

A flow field adaptive defroster for removing the atomized water from fume is composed of two or more defroster units. Each defroster unit consists of a central defroster element comprising the baffle plates and fume flow field regulating block, and two flushers arranged at both sides of said central defroster element.

The invention discloses a characteristic learning-based single image defogging method. Firstly, multi-scale extraction of texture structure characteristics of a foggy image is performed via a sparse autoencoder, and at the same time, various color characteristics related with fog are extracted. Then, a multi-layer neural network is adopted for sample training, the mapping relationship between the texture structure characteristics and the color characteristics and the scene depth in the foggy condition is learned, and a scene depth chart of the foggy image is estimated. On this basis, a transmittance chart is approximately estimated by using the scene depth chart. The transmittance chart effectively reflects the fog concentration of each local area in the foggy image. Finally, with the combination of an atmospheric scattering model, restoration is further carried out according to the transmittance chart and a fogless image is obtained. The invention allows restoration of foggy images so as to obtain high-quality fogless images. In addition, compared with conventional defogging methods, the characteristic learning-based single image defogging method of the invention achieves better universal scene adaptability.

The embodiment of the invention discloses an automobile auxiliary driving system camera demisting device. The device comprises a shell, a camera, a fan, a heater and a control circuit, wherein the camera, the fan, the heater and the control circuit are arranged in the shell. The shell comprises a pasting part for fixing the shell to a front windshield of an automobile. An air hood is composed of agroove formed in the side, provided with the pasting part, of the shell and the front windshield. An air outlet is located in one side of the air hood. An air inlet is formed in the groove. The fan is arranged next to the air inlet. The heater is arranged between the fan and the air inlet. The camera for shooting images outside the front windshield extends to the groove from the inner portion ofthe shell. The control circuit is connected with the fan and the heater so as to control the fan and the heater to be started or stopped and start or stop the demisting function of the camera. By theadoption of the technical scheme, mist on the auxiliary driving camera can be conveniently and quickly removed when an image imaging effect is guaranteed, and the driving experience of a driver is enhanced.

The invention provides an image defogging method based on the concentration feature of fog, comprising the following steps: calculating the fog concentration feature value of each pixel in a foggy image; segmenting the foggy image to get a sub scene set through an image segmentation method based on the fog concentration feature values; screening out a sky-like area from the sub scene set; selecting the first 1% pixels with lowest saturation component in the sky-like area to form a candidate pixel set, selecting the first 10% pixels with highest saturation component in the candidate pixel set to form an atmospheric light area, and calculating the average intensity value of all the pixels in the atmospheric light area as a global atmospheric light value; calculating the transmittance of each pixel in the foggy image; and getting a defogged image according to the global atmospheric light value and the transmittance. The atmospheric light area can be located accurately in the defogging process. The method is less susceptible to highlighted noise points or interference in the foggy image. Therefore, an accurate global atmospheric light value is obtained, and a better defogging effect is achieved. The image defogging method is used to defog a variety of foggy images, and is of high robustness.

The invention discloses a multi-zone oxidizing process and device for an ammonia process of desulfurization of smoke. The device comprises a desulfurizing tower and multi-zone oxidizing tanks; smoke successively passes through a concentration cooling section, an absorption section, a washing section and a dehydrating and demisting section to become pure smoke to be discharged; ammonium sulfate spraying slurry is arranged in the concentration cooling section; an ammonium sulfite and ammonium sulfate spraying solution is arranged in the adsorption section; spraying water is arranged in the washing section; a demister is arranged in the dehydrating and demisting section; after the adsorption liquid discharged from the absorption section is mixed with ammonia water, the mixture successively passes through an imine regenerating region and a sulfite oxidizing region in the multi-zone oxidizing tanks; a part of the generated ammonium sulfite is circularly sprayed in the absorption section through an absorption pump while the other part while the other part is discharged into the sulfite oxidizing region to be oxidized; a part of generated ammonium sulfate is circularly sprayed in the absorption section through an ammonium sulfate pump while the other part is discharged into the concentration cooling section. The device is scientific in design, compact in structure, high in oxidizing efficiency, water-saving, material-saving, land-saving, energy-saving, good in demisting effect, ultra-low in emission and stable in performance, and has very high practicality and wide applicability.

An air-outlet mode selecting device includes first and second rotary doors. Each of the first and second rotary doors has rotary shafts separated from each other in an axial direction of the rotary shafts, an outer peripheral door surface that is provided at a position separated radial outward from the center line of the rotary shafts and is turned with the rotary shafts, and left and right side plates for connecting both ends in the axial direction of the outer peripheral surface and the rotary shafts. One of the first and second rotary doors opens and closes a specified opening among three openings and other rotary door opens and closes the remaining two openings among the three openings. Accordingly, door operation force and air flow resistance can be effectively reduced, and the size of the air-outlet mode selecting device can be effectively reduced.

The present invention relates to a vertical rotary bed ultragravity field device, which is used for water disposing in environmental protection and for the aggrandizement of the physics and chemistry reaction in the process of atmosphere disposing. The device is also suitable to be used in the mass transfer and the reaction process of the multiphase liquid in various chemical industries. The device comprises a barrel-shaped upright shell with an air inlet arranged at the side. The middle of the shell is provided with a vertical rotating element, while the lower part of the shell is provided with a waste liquid bypass outlet. The middle of the rotating element is provided with an air guide barrel, the lower part of the air guide barrel is provided with an air inlet, while the top of the air guide barrel is connected with a demister. The side wall of the rotating element is the rotary packed bed. The whole rotating element is connected with a transmission device which provides power. The upper part of the rotating element is provided with at least three units of bearing guide pulley to form an inner inscribed circle. The rotating element rotates according to the position which is limited by the inscribed circle to bear and guide the rotation of the rotating element. As the device adopts at least three units of bearing guide pulley for supporting, both ends of the rotating element can rotate stably and reliably under the bearing, and the diameter and the volume of the rotating element can be increased. The device is used for the atmosphere disposing.

The invention provides a multispectral polarization image defogging method combined with a sky light polarization model, which comprises the following steps: under a foggy weather condition, firstly,acquiring polarization images under different spectrum channels by using a multispectral polarization imaging detection system, and simultaneously measuring the aerosol optical thickness of a corresponding spectrum band by using a sun photometer; secondly, inputting a detection waveband, a solar zenith angle, aerosol optical thickness, aerosol particle scattering information and the like into a sky light polarization model; obtaining a sky light polarization state distribution diagram through simulation, selecting a sky area in a horizontal field angle on a detection azimuth angle, and obtaining the average value of the light intensity and the average value of the polarization degree to serve as an atmospheric light intensity value and an atmospheric light polarization degree value at infinity respectively. And finally, defogging the polarization images of different spectrum channels by using a defogging method based on polarization difference. According to the method, the problem thatthe polarization degree atmospheric light information is estimated mistakenly when no sky area exists in a multispectral polarization image scene or some high-brightness objects exist in the scene issolved.

The invention discloses an image haze removal method based on a pixel dark channel and anisotropic diffusion filtering, belonging to the technical field of the image haze removal method. The technical key point is that the image haze removal method comprises the following steps of: (1) calculating a dark channel Idark(x) of each pixel point of haze image I(x); (2) calculating an atmospheric light intensity value A according to the dark channel Idark(x) of each pixel point; (3) performing anisotropic diffusion filtering on the dark channel Idark(x) of each pixel point; and (4) calculating transmittance t(x) of each pixel point according to a transmittance calculating formula; and (5) performing image restoration processing according to the atmospheric light intensity value A and the transmittance t(x). The invention aims at providing the image haze removal method, which is relatively small in calculated amount, less in stored resources occupied and quick in processing speed, based on pixel dark channel and anisotropic diffusion filtering. The image haze removal method is used for image haze removal processing.