DETERMINING PIXEL INTENSITY VALUES IN IMAGING

    公开(公告)号:US20230089886A1

    公开(公告)日:2023-03-23

    申请号:US17798585

    申请日:2021-02-03

    IPC分类号: H04N5/335

    摘要: In an embodiment, a method (100) is described. The method includes accessing (102) data from a sequence of images of a subject illuminated with ambient light and illumination having a sinusoidal intensity modulation in time. An imaging device is used to obtain the sequence of images and is configured such that a different spatial intensity modulation pattern is apparent in consecutive images of the sequence. The method further includes determining (104), based on a set of measured pixel intensity values in each of the sequence of images, a set of revised pixel intensity values for generating a revised image of the subject such that a reduced level of ambient lighting is apparent in the revised image compared with the level of ambient lighting apparent in at least one of the sequence of images.

    A HANDHELD DEVICE FOR PERFORMING A TREATMENT OPERATION ON SKIN

    公开(公告)号:US20210322098A1

    公开(公告)日:2021-10-21

    申请号:US17263181

    申请日:2019-08-21

    IPC分类号: A61B18/20 A61B5/0531 A61B5/00

    摘要: According to an aspect, there is provided a handheld device (2) for applying energy pulses to skin (17) of a subject to perform a treatment operation as the handheld device is moved across the skin, the handheld device comprising: an aperture (6) that is to be placed adjacent to the skin; at least one energy source (8) for generating an energy pulse and for providing the energy pulse through the aperture to perform the treatment operation on 5 skin adjacent the aperture, wherein the at least one energy source has a minimum pulse repetition period following the generation of an energy pulse before a subsequent energy pulse can be generated; a first skin property sensor (14) for measuring a skin property and for outputting a first measurement signal representing measurements of the skin property at a first sensing position (24), wherein the skin property is a property that changes in response to the application of an energy pulse to the skin, and wherein the first sensing position is in front of the aperture relative to an intended motion direction of the handheld device over the skin; a second skin property sensor (16) for measuring the skin property and for outputting a second measurement signal representing measurements of the skin property at a second sensing position (26), wherein the second sensing position is behind the aperture relative to the intended motion direction; a memory unit (56); and a control unit (10) that is coupled to the at least one energy source to control the generation of energy pulses by the at least one energy source, and coupled to the first skin property sensor and the second skin property sensor to obtain the first measurement signal and the second measurement signal, wherein the control unit is configured to store a profile of at least the first measurement signal in the memory unit; wherein the control unit is further configured to, when the handheld device is moving in the intended motion direction over the skin: analyse the profile of the first measurement signal to determine if the first skin property sensor is passing over a previously treated area of skin; on detecting that the first skin property sensor is not passing over a previously treated area of skin, control the at least one energy source to generate an energy pulse if, or once, the minimum pulse repetition period following the generation of a previous energy pulse has expired; on detecting that the first skin property sensor is passing over a previously treated area of skin, performing the consecutive operations of: preventing the generation of an energy pulse, even if the minimum pulse repetition period following the generation of a previous energy pulse has expired; marking a point in the profile of the first measurement signal stored in the memory unit according to a predetermined rule, wherein the marked point relates to a position on the previously treated area of skin; using information about the marked point, analyse the profile of the second measurement signal to identify a similar marked point in the profile of the second measurement signal; on identifying the similar marked point in the profile of the second measurement signal, controlling the at least one energy source to generate an energy pulse if, or once, the minimum pulse repetition period following the generation of a previous energy pulse has expired.

    SKIN TREATMENT METHOD AND APPARATUS

    公开(公告)号:US20210204995A1

    公开(公告)日:2021-07-08

    申请号:US17205448

    申请日:2021-03-18

    IPC分类号: A61B18/12

    摘要: A method of treating a skin tissue area (3) having a skin surface (5) is provided. The method comprises the steps of: deforming the skin tissue area into a deformed shape comprising a plurality of folds (17) in the skin tissue area; arranging radiofrequency electrodes (13) in contact with the skin surface on opposite sides of the deformed skin tissue area; and, while maintaining the skin tissue area in said deformed shape, providing a spatially continuous radiofrequency energy flow between the radiofrequency electrodes on opposite sides of the deformed skin tissue area through the deformed skin tissue area, thereby heating at least a portion (19) of the deformed skin tissue area; and releasing the skin tissue area from said deformed shape, thereby deforming said heated portion (19) into a wave-shaped zone of heated skin tissue having a depth relative to the skin surface that varies between a minimum and a maximum value in a direction between said opposite sides. Accordingly, an apparatus for treating a skin tissue area (3) is provided.

    A SYSTEM FOR PERFORMING AMBIENT LIGHT IMAGE CORRECTION

    公开(公告)号:US20230016923A1

    公开(公告)日:2023-01-19

    申请号:US17782277

    申请日:2020-12-15

    IPC分类号: H04N5/235

    摘要: There is provided a system (100) comprising a light source (110), an imaging unit (120) configured to capture a plurality of images of an subject, wherein each of the plurality of images is captured at an exposure time shorter than the wave period of the pulsed illumination, wherein the pulse frequency of the illumination is not a multiple integral of the frame rate at which the images are captured, and wherein a total time during which the plurality of images is captured is at least half of the wave period of the pulsed illumination, and a control unit (130) configured to: obtain a predetermined number n of candidate images, generate a sorted list of pixels by sorting respective pixels, apply a set of weights to the respective sorted list of pixels, and generate an estimated ambient light corrected image based on the plurality of weighted and sorted lists of pixels.

    A SYSTEM FOR PERFORMING AMBIENT LIGHT IMAGE CORRECTION

    公开(公告)号:US20220400221A1

    公开(公告)日:2022-12-15

    申请号:US17771513

    申请日:2020-10-30

    IPC分类号: H04N5/353 H04N5/225 H04N5/235

    摘要: There is provided a system for performing ambient light image correction. The system comprises a light source, a rolling shutter imaging unit configured to capture a plurality of images of the object at an exposure time shorter than the wave period of the pulsed illumination from the light source, and a control unit configured to generate a first composite image comprising a plurality of bright bands from the plurality of captured images by combining sections from the plurality of captured images which correspond to bright bands, generate a second composite image comprising a plurality of dark bands from the plurality of captured images by combining sections from the plurality of captured images which correspond to dark bands, and generate an ambient light corrected image based on a difference in pixel information between the first composite image and the second composite image.

    DEVICE FOR RADIO-FREQUENCY SKIN TREATMENT

    公开(公告)号:US20220233852A1

    公开(公告)日:2022-07-28

    申请号:US17717403

    申请日:2022-04-11

    摘要: A coupling arrangement including a coupling member arranged on a skin contact surface of an electrode of a radio-frequency (RF) skin treatment device for electrically coupling the electrode to a user's skin. The coupling member includes a first layer and a second layer. The first layer has a first electrically conductive material configured to be arranged on the skin contact surface via one side of the first layer. The second layer has a second (different) electrically conductive material arranged on the first layer, on an opposite side of the first layer. The first layer has a thickness in a range from 10 μm to 100 μm, and the first electrically conductive material has a modulus of elasticity of at least 100 kPa. The second layer has a thickness of 10 μm or less, and the second electrically conductive material has a viscosity of 1,000 CPS or less.

    DETERMINING PIXEL INFORMATION
    8.
    发明公开

    公开(公告)号:US20230353889A1

    公开(公告)日:2023-11-02

    申请号:US17928973

    申请日:2021-06-03

    摘要: In an embodiment, a method (100) is described. The method is a computer-implemented method. The method comprises receiving (102) pixel information corresponding to at least part of a first, second and third image, acquired by an imaging system, of a subject illuminated by temporally modulated illumination. A time delay between an acquisition start time of the first, second and third images is such that there is an overlap in time during acquisition of the first, second and third images. The method further comprises determining (104) modified pixel information for constructing a modified image of the subject. The modified pixel information is determined based on: a difference between the received pixel information of the first, second and third images to reduce an effect of ambient lighting in the received pixel information; and a combination of the received pixel information to cancel out a spatial intensity modulation pattern apparent in each of the first, second and third images. The spatial intensity modulation pattern is due to a timing relationship between an imaging time period over which the imaging system acquires each image and a modulation time period of the temporally modulated illumination.

    RADIO FREQUENCY SKIN TREATMENT
    9.
    发明公开

    公开(公告)号:US20230157744A1

    公开(公告)日:2023-05-25

    申请号:US18094826

    申请日:2023-01-09

    IPC分类号: A61B18/14 A61N1/40

    摘要: A device for radio frequency (RF) skin treatment of skin of a user comprising an active electrode, a return electrode, an RF generator arranged to supply RF energy to the user's skin via the active and return electrodes. The return electrode having a planar skin contact surface extending in a main plane. The active electrode having a skin contact surface with a maximum dimension in a range from 100 μm to 500 μm. The surface area of the planar skin contact surface of the return electrode is at least 5 times larger than a surface area of the skin contact surface of the active electrode. The skin contact surface of the active electrode is arranged in a position at a distance from the main plane. The device may be used to control the dimensions and shape of a thermal lesion in the user's skin generated by the RF energy.