SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

    公开(公告)号:US20240362822A1

    公开(公告)日:2024-10-31

    申请号:US18573988

    申请日:2022-02-22

    CPC classification number: G06T7/90 G06T7/44 G06T7/521

    Abstract: There is provided a signal processing device and a signal processing method capable of accurately acquiring distance information in a case where a transparent subject is present. The signal processing device includes an acquisition unit that acquires histogram data of a flight time of irradiation light to a subject, a transparent subject determination unit that determines whether or not the subject is a transparent subject on the basis of peak information indicated by the histogram data and three-dimensional coordinates of the subject calculated on the basis of the histogram data, and an output unit that outputs the three-dimensional coordinates of the subject in which color information or three-dimensional coordinates of the subject is corrected on the basis of a transparent subject determination result of the transparent subject determination unit. The technology of the present disclosure can be applied to, for example, a signal processing device and the like that corrects distance information acquired by a ToF sensor of a direct ToF system.

    High dynamic range video color remapping

    公开(公告)号:US12125183B2

    公开(公告)日:2024-10-22

    申请号:US17511718

    申请日:2021-10-27

    Abstract: To allow a better determination of an image of a different luminance dynamic range (in particular as characterised by a different maximum luminance a.k.a. peak brightness) than an input image, the present application teaches several variants of a luminance processor (501) arranged to calculate an output luminance of a pixel of an output image (Im_LDR; Im3000nit) having a second luminance dynamic range characterized by a second peak brightness (PB_LDR; PB_MDR) from an input luminance of a spatially collocated pixel of an input image (MAST_HDR) having a first luminance dynamic range characterized by a first peak brightness (PB_HDR), characterized in that the luminance processor comprises:



    a gain calculation unit (514) arranged to calculate a multiplication factor (gL) being a function of the input luminance and a luminance mapping function (FLM);
    a maximum calculation unit (601) arranged to calculate a strength value (V) which is the maximal one of the three red, green and blue color components of the color of the pixel of the input image, wherein those components are either linear red, green and blue color components or a power of those linear red, green and blue color components;
    an overflow calculator (602) arranged to calculate an overflow measure (T) indicating how close to the upper gamut boundary the output luminance is;
    a gain factor modification unit (603) arranged to determine an alternative gain factor (F1(gL)) in case the overflow measure is larger than a threshold (G), and arranged to keep the original gain factor otherwise, and arranged to output one of those as a final gain factor (gF); and
    a multiplier (530) to multiply the input color (R′G′B′_nrm) by the final gain factor (gF) to obtain an output color (R′G′B′_HDR) having the output luminance.

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