41results about How to "Avoid image noise" patented technology

The invention discloses a haze removing method for a single image based on image haze concentration estimate. The method comprises the following steps: 1) inputting a haze image; 2) converting the inputted image from the RGB space into the HSV space; dividing SV channel images and calculating the characteristic vectors of the local blocks; 3) with the target of making the lowest image haze concentration, calculating the initialized optimal atmosphere transmission value for the haze image; 4) using a guide filter to refine the optimal atmosphere transmission value; and 5) calculating the refined optimal atmosphere transmission value, the atmosphere light estimation value as well as the brightness value of each pixel in the haze image to obtain a clear image. According to the invention, through the conversion of image haze removal into the problem of haze concentration minimizing, the atmosphere transmission value can be determined accurately so as to remove the haze as much as possible and to avoid the severe halo formation and image noise in the saturated areas. Not only the haze can be eliminated effectively, but also the halo formation and image noise can be controlled not to rise. Therefore, the method can be applied to different complex weathers.

The invention discloses a full-open permanent magnet for MRI, wherein the permanent magnet comprises: full-open main structure of a rectangular structure composed of two vertical yokes arranged left and right symmetrically and two transverse yokes arranged up and down symmetrically with an air gap zone of the permanent magnetic positioned in the middle of the full-open main structure; up and down two parallel opposite main poles which are respectively arranged on the sides close to the air gap zone of and connected with the up and down two transverse yokes; and up and down two parallel opposite pole plates which are respectively arranged on the sides close to the air gap zone of and connected with the up and sown two main poles. The invention enormously reduces the weight of the yokes, improves the shimming efficiency and increases the openness of the magnetic field.

A display panel control circuit includes a controller which processes external image data and sync signals from an external signal source, and source and gate drivers which drive a display panel on the basis of processed results from the controller. The controller is configured to provide predetermined internal image data and sync signals which are generated immediately after supply of power and processed instead of the external image data and sync signals, and whose processing results are temporarily output to the source and gate drivers.

A display device including a display unit having a plurality of pixels includes a calculation unit which accumulates the number of pixels of which display state is changed among the plurality of pixels so as to calculate the accumulated number of update pixels when a part of an image displayed on the display unit is changed, and a refresh control unit which executes a refresh operation of the display unit when the calculated accumulated number of update pixels becomes equal to or more than a defined value.

A belt-type fixing device is provided in which a nip pressure distribution in a fixing nip is made generally uniform with respect to a paper feeding direction and which thereby prevents occurrence of image noise even when a thick paper is fed.

The belt-type fixing device has: an endless-sheet-like fixing belt, a pressurizing roller which has elasticity and on which a paper is passed through a fixing nip that is contact part between the pressurizing roller and an outer circumferential surface of the belt member, and a nip forming member which is provided in contact with an inner surface of the fixing belt, which relatively presses the fixing belt against the pressurizing roller, of which an opposite surface pressing the pressurizing roller is formed as a curved surface extending along an outer circumferential surface of the pressurizing roller, and of which the opposite surface is composed of an elastic layer.

The embodiment of the invention discloses an image enhancement method and device, electronic equipment and a medium. The method comprises the steps of determining an upper platform threshold value anda lower platform threshold value of double-platform histogram equalization according to a mean value and a standard deviation of histogram values corresponding to gray values of a base layer image, and performing double-platform histogram equalization processing on the base layer image to obtain a target base layer image; performing gain processing on the detail layer image based on the gain coefficient, and performing piecewise mapping processing based on a piecewise function to obtain a target detail layer image; fusing the target base layer image and the target detail layer image to obtainan enhanced target image, wherein the base layer image and the detail layer image are obtained by filtering the target image. According to the scheme, the problem of excessive stretching of the background can be effectively solved, and details of the image are enhanced while excessive enhancement of the noise of the image is avoided.

To provide an image forming apparatus that prevents generation of image noise by recovering a movable member having flexibility from creep deformation. The image forming apparatus for forming images on a recording medium comprises a movable member having flexibility, a detection section for detecting temperature of the movable member directly, a storage section for storing the temperature detected by the detection section when the apparatus is powered off, and a control section for changing a duration of time during which the movable member is in a preparatory operation corresponding to the detected temperature read from the storage section when the apparatus is powered on.

In serial transmission of a mixture of isochronous data and anisochronous data, communications through a transmission path with a high ratio of occurrence of transmission errors may disturb images during streaming reproduction and produce noise in sound. To solve this problem, the isochronous data that has not been successfully received is retransmitted by using an anisochronous region. Thus, a transmission error of the isochronous data can be reduced without impairment of isochronous characteristics of the data.

The invention discloses a lens shadow compensation method and device, a storage medium and a terminal. The method comprises the steps that an original image and an initial LSC compensation coefficientare acquired; acquiring ambient brightness when the original image is acquired; adjusting the initial LSC compensation coefficient according to the ambient brightness to obtain an adjusted LSC compensation coefficient, the lower the ambient brightness is, the larger the compression amplitude of the adjusted LSC compensation coefficient is than that of the initial LSC compensation coefficient; andperforming lens shadow compensation processing on the original image according to the adjusted LSC compensation coefficient to obtain a processed image. Through the scheme of the invention, the lensshadow compensation degree of the original image can be dynamically and adaptively adjusted according to the ambient brightness, so that the brightness of the surrounding area of the original image isproperly improved, and the image effect is prevented from becoming worse due to the fact that the image noise is increased in a dark environment.

Microwave photonic vector network analyzer and a method for measuring scattering parameters of a microwave device are provided. The analyzer comprises a microwave source, wherein a signal loading module, an optical sampling module and a signal processing module are sequentially arranged along a signal output direction of the microwave source; an output end of the signal processing module is respectively connected with a control end of the microwave source and a control end of the optical sampling module; and two test ports of the signal loading module are connected with both ends of a device to be tested. The invention realizes direct sampling and frequency conversion for microwave signals, abandons a superheterodyne structure and/or direct frequency conversion structure in the traditional network analyzer, simplifies the structure of the system while improving the measurement frequency range and avoiding image interference, and reduces system complexity, cost and power consumption.

In a beltless tandem-type image forming apparatus of the invention, a plurality of pairs of transfer rollers are placed side by side at intervals along a conveying direction of sheets. A control section independently conveys sheets in sequence through nip sections of respective pairs of transfer rollers driven by a driving section while sequentially transferring images formed by an imaging section onto the sheets. Conveying speeds of the respective pairs of transfer rollers controlled by the driving section are gradually decreased for every pair of transfer rollers from an upstream side toward a downstream side along a conveying direction of the sheets, and consequently, a driving period for driving the respective pairs of transfer rollers to convey each sheet is gradually increased for every pair of transfer rollers from the upstream side toward the downstream side along the conveying direction of the sheets. The control section performs control so that an imaging period by the imaging section is synchronized with a driving period by the driving section in every pair of transfer rollers.

The invention relates to a medical device (4) with a tubular interior space (3) for accommodating the subject to be examined (1), a cladding (10) of the tubular interior space (3) facing towards the subject to be examined and a device for lighting the tubular interior space (3), which comprises at least one lamp (5), wherein the lamp (5) is mounted on the side of the cladding (10) of the tubular interior space (3) facing towards the subject to be examined and forms the tunnel contour of the tubular interior space (3).

The invention relates to a tissue image processing method and device, a storage medium and computer equipment. The method includes the steps of obtaining tissue image data; receiving a tissue label setting instruction; setting label identifiers of object tissue as label identifiers corresponding to image data of the object tissue. After the tissue image data is obtained, when management operationneeds to be carried out on the tissue involved in the tissue image data, the tissue label setting instruction is received in order to set the label identifiers of the image data of the object tissue,correspondingly the label identifiers of the object tissue are changed, different label identifiers correspond to different rendering parameters, the corresponding tissue images are thus distinguishedfrom other tissue images during display, doctors can more conveniently carry out further management and observation on the tissue images to obtain diagnosis information, and therefore the diagnosis efficiency is improved. Meanwhile, other tissue can be prevented from generating image interference on the object tissue, and therefore the diagnosis accuracy is improved.