摘要:
An apparatus of reducing noise includes: an edge determining module determining whether each pixel of an image corresponds to an edge; a low pass filter module performing low pass filtering of the image in two directions and performing low pass filtering only for the pixel determined not to be the edge; a filter selecting module selecting a filter having a flexible size to be applied to a mask region for each of the images low pass filtered based on the average brightness of the entire region and the average brightness of the mask region having a predetermined size; a sigma filter module sigma filtering the mask region using the selected filter for each of the images low pass filtered; and an averaging module averaging the image sigma filtered in the two directions.
摘要:
There are provided a method and an apparatus for reducing noise in a digital image capable of reducing noise while preventing damage to an edge of a digital image. The apparatus includes: a high pass filtering unit determining an edge region of an input image; a low pass filtering unit performing low pass filtering on a region of the input image determined not to be the edge region by the high pass filtering unit; and a sigma filtering unit performing sigma filtering on the region of the input image determined not to be the edge region by the high pass filtering unit.
摘要:
There are provided an image processing apparatus and an image processing method for night vision that can generate a night vision image in which the overall quality thereof is maintained to be excellent and an obstacle is easily distinguished. The image processing apparatus for night vision includes: a brightness improving unit improving the brightness of an inputted infrared image; an obstacle judging unit judging whether an obstacle is present by analyzing an infrared image in which brightness is improved by the brightness improving unit; an obstacle region separating unit separating an image of a region judged as the obstacle by the obstacle judging unit; and an image synthesizing unit synthesizing the image of the region judged as the obstacle separated by the obstacle region separating unit with the inputted infrared image.
摘要:
Disclosed herein are an apparatus and a method for measuring velocity of an ultrasound signal. The apparatus for measuring velocity of an ultrasound signal according to an exemplary embodiment of the present invention includes a transmitting module transmitting ultrasound signals to targets; a receiving module receiving the ultrasound signals reflected from the targets; an image generating module using the received ultrasound signals to generate a plurality of ultrasonic images having different sound velocities; and a sound velocity determining module using the plurality of generated ultrasonic images to determine optimal sound velocity for scanning the targets.
摘要:
Disclosed herein are a method for estimating acoustic velocity of an ultrasonic image and an ultrasonic diagnosis apparatus using the same. The method for estimating acoustic velocity of an ultrasonic image includes: (A) dividing each of the ultrasonic images into a plurality of blocks; (B) extracting contours of ultrasonic images for each block of one frame among the ultrasonic images; (C) calculating and analyzing average luminance values of each block; (D) determining the optimal block number using the average luminance values and selecting the optimal blocks; and (E) estimating and applying the real acoustic velocity, whereby the acoustic velocity is estimated in real time and is applied to the ultrasonic diagnosis apparatus.
摘要:
Disclosed herein are an apparatus and a method for measuring velocity of an ultrasound signal. The apparatus for measuring velocity of an ultrasound signal according to an exemplary embodiment of the present invention includes a transmitting module transmitting ultrasound signals to targets; a receiving module receiving the ultrasound signals reflected from the targets; an image generating module using the received ultrasound signals to generate a plurality of ultrasonic images having different sound velocities; and a sound velocity determining module using the plurality of generated ultrasonic images to determine optimal sound velocity for scanning the targets.
摘要:
Provided are an optical system for processing an image using a PSF and an image processing method thereof. The optical system includes one or more lenses, an image sensor, and an image processor. The image sensor senses an image formed by the lenses, and the image processor recovers the image sensed by the image sensor using a PSF. A BFL defined as a distance between a refractive surface of one of the lenses that is closest to an image-side and the image sensor, is controlled such that ΔPSF defined by Equation below has a value less than 100%. Δ PSF ( % ) = PSF ∞ - PSF macro ( PSF ∞ + PSF macro ) / 2 × 100 An image is recovered using a PSF, so that an excellent image can be obtained over a wide object distance range.
摘要:
Disclosed herein is a Light Emitting Diode (LED) light source lens for emitting light in a lateral direction. The LED source lens includes an upper part, an upper part and a central part. The upper part includes an upper part reflecting surface bent symmetrically with respect to the central axis of the lens, and an upper part refracting surface extended from the end of the upper part reflecting surface parallel with the central axis. The central part includes a side surface extended from the lower end of the upper part refracting surface and bend inwards, and refracts or reflects light through the side surface. The lower part accommodates the LED light source, and includes an arch-shaped lower part refracting surface extended outwards from the lower end of the side surface of the central part. The light radiated from the LED light source is emitted perpendicular to the central axis.
摘要:
A subminiature imaging optical system including: a first lens having overall positive refractive power, the first lens including a first lens part having a convex object-side surface, a second lens part having an object-side surface in contact with an image-side surface of the first lens part and a third lens part having an object-side surface in contact with an image-side surface of the second lens part; and a second lens having overall positive refractive power, the second lens including a fourth lens part having an object-side surface with a convex center and a concave peripheral portion, about an optical axis, a fifth lens part having an object-side surface in contact with an image-side surface of the fourth lens part and a sixth lens part having an object-side surface in contact with an image-side surface of the fifth lens part, wherein the second lens part has a stop provided on the object-side or image-side surface thereof.
摘要:
A subminiature imaging optical system including: a first lens having overall positive refractive power, the first lens including a first lens part having a convex object-side surface, a second lens part having an object-side surface in contact with an image-side surface of the first lens part and a third lens part having an object-side surface in contact with an image-side surface of the second lens part; and a second lens having overall positive refractive power, the second lens including a fourth lens part having an object-side surface with a convex center and a concave peripheral portion, about an optical axis, a fifth lens part having an object-side surface in contact with an image-side surface of the fourth lens part and a sixth lens part having an object-side surface in contact with an image-side surface of the fifth lens part, wherein the second lens part has a stop provided on the object-side or image-side surface thereof.