7 results about "Black point" patented technology

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.

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 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.