Abstract: An image is obtained. A denoised image is determined by performing denoising processing on the image based on a preset denoising method. At least two frequency information components of the denoised image are obtained by performing filter processing on a preset region image of the denoised image on at least two preset frequency levels. A sharpened image is obtained by performing superposition processing on the denoised image based on at least two frequency information components and a preset adjustment parameter. A target image is determined based on the sharpened image.

Abstract: A surgical tool for piercing tissue of a body comprises a hollow external component (1) having a peripheral wall (11), an internal component (2) movable disposed inside the external component (1) and having a piercing head (21); when the piercing head (21) and the internal component (2) retract relative to the external component (1), the movable component (3) deforms partially, expands outwardly in a radial direction, and fills the bladder (6). The movable component can be deformed to expand outward in the radial direction, so as to make the bladder to expand, so that the surgical tool can be positioned on the body of the patient.

Abstract: An image is obtained. A denoised image is determined by performing denoising processing on the image based on a preset denoising method. At least two frequency information components of the denoised image are obtained by performing filter processing on a preset region image of the denoised image on at least two preset frequency levels. A sharpened image is obtained by performing superposition processing on the denoised image based on at least two frequency information components and a preset adjustment parameter. A target image is determined based on the sharpened image.