10 results about "Black point" patented technology

Disclosed are dynamic system optical-to-optical transfer functions (OOTF), which adapt displayed content to provide a so-called "perceptual reference" effect for the viewer, wherein, as the current viewing conditions depart from a "reference" viewing scenario, the dynamic system OOTF adapts the content and / or display to provide the viewer with as close as possible to the perceptual effect of the "reference" viewing scenario. The dynamic system OOTF may perform one or more of the following adaptation processes: adapting media content from a source color space to a linear XYZ color space; adapting media content from a linear XYZ color space to a display device's color space; automatically adjusting display device brightness, white point, and / or black point; adapting media content from an intended viewing environment to a common compositing space's fixed viewing environment; and / or adapting media content from the common compositing space's fixed viewing environment to that of the viewer's current viewing conditions.

Projection method and projector. Improve the detection accuracy of points included in a projected point pattern. A projector (1) projects a point pattern (210a) including a first point (231), a second point (232), a third point (233), a fourth point (234), and a black point (235) to a projection surface (7). The display modes of the first point (231), the second point (232), the third point (233), the fourth point (234), and the black point (235) are different from each other, the first point (231) is located adjacent to the second point (232) in a horizontal direction and adjacent to the third point (233) in a vertical direction, the second point (232) is located adjacent to the fourth point (234) in the vertical direction, and the third point (233) is located adjacent to the first point (231) in the horizontal direction.

The application discloses a method and a device for removing a binding hole in a scanned image, and relates to the technical field of image processing. In the method, the device removes the binding hole in the scanned image based on a preset binding hole detection model to obtain a predicted position of the binding hole. In the case that the background plate of a scanner is gray, it is determined whether the minimum value of three channel color values of a pixel point of the scanned image is greater than a preset background brightness threshold value or whether the maximum value of the three channel color values is less than a preset threshold value. If yes, the pixel point of the scanned image is determined as a white point. If no, the pixel point of the scanned image is determined as a black point. The pixel point of the scanned image is converted into a white point or a black point to obtain a binary image. The predicted position of the binding hole in the binary image is cut into a sub-image. Contour searching is performed on the sub-image to obtain a binding hole mask image. The scanned image is filled and repaired based on the binding hole mask image and the color of the background plate of the scanner to obtain a target image with the binding hole removed.

The utility model relates to the field of industrial mechanical device discloses a kind of black point detection equipment for horizontal immersion drying, including horizontal device ontology, the two sides of the horizontal device ontology are respectively provided with feed inlet and discharge port, immersion interval, drying room and detection room are sequentially provided between the feed inlet and discharge port, the inside fixed connection of the immersion interval has adjusting structure, the adjusting structure includes sliding slot, the inside fixed connection of the immersion interval has threaded rod, one end of the threaded rod is fixedly connected with adjusting motor, the outside of the threaded rod is sleeved with sliding block, the bottom of the sliding block is fixedly connected with moving rod, the bottom of the moving rod is fixedly connected with moving press roll. In the utility model, adjusting motor and threaded rod are used, the horizontal position of moving press roll is adjusted by controlling the movement of sliding block, and then the immersion time of paper is controlled, the immersion time of paper of different materials is adjusted, and the compatibility and applicability of the equipment are improved.

Device for performing an automated seamless main corneal incision, comprising a machine operating arm and a scalpel (1) installed on the machine operating arm, wherein the machine operating arm comprises a clamping device (2) for clamping the scalpel (1) and a drive arm for driving the clamping device (2) to oscillate, wherein the drive arm is provided with a first linear motor (3) and a second linear motor (4), wherein the clamping device (2) is provided with a third linear motor (5), characterized by that the device is designed to perform the automated seamless corneal main incision according to a method comprising the following steps: Step 1: two eye images are taken using a microscope camera system with a vertical shift in the millimeter range (a); Step 2: each image is preprocessed, converted into a grayscale image, and the first image is subjected to vertex detection to obtain a plurality of candidate vertices and obtain the coordinates of the vertices; Step 3: a plurality of vertices are centered and R j is the radius to detect black and white points relative to the vertices, and the black point is located in the white pixel area of ​​the vertex and the white point is located in the black pixel area of ​​the vertex, and the pixel gray level of the black point is < 0.5 and the pixel gray level of the white point is > 0.5, then the vertex is the scalpel point P' i , and the calculation formula for the position of the black dot and the white dot is as follows: X blacki = ∑ j ∈ R j ( 1 − I ( X j . Y j ) ) Y blacki = ∑ j ∈ R j ( 1 − I ( X j . Y j ) ) Y j ∑ j ∈ R j ( 1 − I ( X j . Y j ) ) X whitei = ∑ j ∈ R j ( 1 − I ( X j . Y j ) ) Y whitei = ∑ j ∈ R j ( 1 − I ( X j . Y j ) ) Y j ∑ j ∈ R i ( 1 − I ( X j . Y j ) ) R j ⇒ [ (X j − X i ) 2 + (Y j − Y i ) 2 ≤ range 2 ] including X blacki and Y blacki the coordinate values ​​of the black point, X whitei and Y whitei are the coordinate values ​​of the white point, X j and Y j are the respective coordinates of all pixels in the area of ​​the corner point as the center and R j as radius, I is the gray value of the point, range is the maximum value of the selected radius and X i and Y i are the coordinate values ​​of the scalpel point P' i ; Step 4: the P' iof the first image is adjusted to the second image to achieve a pixel distance between the adjustment points P'' i , P' i and P'' i to obtain; Step 5: The formula for calculating the depth of the scalpel point is as follows: z ′ = ( r Δ r + 1 ) a where r is the distance between the scalpel point P' i and the magnification center of the microscope, and Δr is the pixel distance between P' i and P'' i , which is called parallax; Step 6: the position and relative depth of the scalpel (1) are obtained according to the calculation, and the position of the iris is determined and the cutting position is positioned at the point on the edge of the iris closest to the pupil center; Step 7: the machine operating arm controls the movement of the scalpel (1) along the set cutting path.

Disclosed are dynamic system optical-to-optical transfer functions (OOTF), which adapt displayed content to provide a so-called “perceptual reference” effect for the viewer, wherein, as the current viewing conditions depart from a “reference” viewing scenario, the dynamic system OOTF adapts the content and / or display to provide the viewer with as close as possible to the perceptual effect of the “reference” viewing scenario. The dynamic system OOTF may perform one or more of the following adaptation processes: adapting media content from a source color space to a linear XYZ color space; adapting media content from a linear XYZ color space to a display device's color space; automatically adjusting display device brightness, white point, and / or black point; adapting media content from an intended viewing environment to a common compositing space's fixed viewing environment; and / or adapting media content from the common compositing space's fixed viewing environment to that of the viewer's current viewing conditions.

The utility model relates to the field of paper detection, in particular to a black spot detection automatic layering stacking device which comprises a fixed rack, a visual camera is arranged on the fixed rack in the direction close to a paper inlet, a stacking moving trolley is arranged on one side of the fixed rack, and a pneumatic automatic turning plate is arranged on the top of the fixed rack. A lower-layer conveying roller and an upper-layer conveying roller are arranged on the side, close to the stacking moving trolley, of the pneumatic automatic turning plate, and blowing mechanisms are arranged on the sides, close to the pneumatic automatic turning plate, of the lower-layer conveying roller and the upper-layer conveying roller; according to the utility model, advanced detection equipment and technology are adopted to strictly screen each batch of paper, defective paper and good paper can be automatically separated and stacked when the defective paper is detected, the paper with black spots can be found and removed in time, and stable quality of output products is ensured and the output products meet the standard.

The invention discloses a method and device for removing binding holes in a scanned image, and relates to the technical field of image processing. In the method, the removal device detects a to-be-processed scanning image based on a preset binding hole detection model to obtain a binding hole prediction position; when the background base plate of the scanner is gray, determining whether the minimum value of the three-channel color values of the pixel points of the scanned image is greater than a preset background brightness threshold or whether the maximum value of the three-channel color values is less than a preset threshold; if yes, determining that the pixel points of the scanned image are white points; if not, determining that the pixel points of the scanned image are black points; pixel points of the scanned image are converted into white points or black points, and a binary image is obtained; cutting the predicted positions of the binding holes in the binarized image into sub-images; performing contour searching on the sub-images to obtain a binding hole mask image; and filling and repairing the scanned image based on the binding hole mask image and the background base plate color of the scanner to obtain a target image without binding holes.

The application relates to a light axis perpendicularity error judgment and correction method and equipment based on black point focusing, the error judgment method first performs coarse focusing, sequentially completes three groups of calibration sample structures in the form of a right triangle, determines accurate focusing distances of three calibration sample machining positions through black point testing, calculates plane tilt rates of a machining plane along X and Y directions by combining the side length of adjacent calibration sample structures, and judges whether the light axis perpendicularity has errors according to the size of the plane tilt rate. The error judgment and correction method solves the problem of incomplete structure caused by the misalignment of a laser focus and a machining plane in a two-photon polymerization machining process, has the advantages of simplicity, convenience and high precision, and can further realize machining plane flatness, that is, light axis perpendicularity error judgment and correction.

The invention discloses a PDF417 code rotation direction rapid acquisition method, which comprises the following steps: S1, acquiring an original PDF417 code image, and processing the image to obtain a processed image; s2, traversing the processed image, and judging whether a start character and an end character of a PDF417 code are found or not; if yes, executing the step S3; s3, respectively fitting the start point array and the end point array of the start character and the start point array and the end point array of the end character to obtain a start line and an end line corresponding to the start character and the end character; s4, acquiring extension lines of the starting line and the ending line, and searching the edge position of the PDF417 code according to the extension lines; s5, acquiring end points of the start character and the end character, combining and connecting every two corresponding end points, traversing points on a connecting line, counting the number of black spots, judging whether the counted number of the black spots does not exceed a preset range or not, if yes, calculating an included angle set of the connecting line and a horizontal line, and if not, calculating the included angle set of the connecting line and the horizontal line; and taking the median in the included angle set as the rotation angle of the PDF417 code.