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A method and equipment for detecting the dot area rate of a printing plate

A technology of dot area ratio and detection method, which is applied in the detection of printing plate dot area ratio and the field of dot area ratio detection, can solve the problems of inconvenient operation and high calculation cost, save time, improve detection speed, and facilitate miniaturization and the effect of portability

Active Publication Date: 2019-05-07
SHANGHAI PUBLISHING & PRINTING COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the embodiment of the present invention is to provide a method and equipment for detecting the dot area ratio of the printing plate in order to overcome the defects of high calculation cost and inconvenient operation of the dot area ratio of the printing plate in the prior art

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  • A method and equipment for detecting the dot area rate of a printing plate
  • A method and equipment for detecting the dot area rate of a printing plate
  • A method and equipment for detecting the dot area rate of a printing plate

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Embodiment 1

[0052] This embodiment provides a detection device for portable dot area ratio, refer to figure 1 , the detection device includes a portable housing (not shown in the figure), an image acquisition unit 101 , a grayscale processing unit 102 , a binarization unit 103 , a filter unit 104 , and a dot area ratio calculation unit 105 . The image acquisition unit 101 is arranged on the portable housing, and the grayscale processing unit 102, the binarization unit 103, the filtering unit 104, and the dot area ratio calculation unit 105 are arranged inside the portable housing.

[0053] The image acquisition unit 101 is used to acquire the dot image of the printing plate. The grayscale processing unit 102 is configured to perform grayscale processing on the dot image to generate a grayscale image. The binarization unit 103 is used to binarize the grayscale image to generate a binarized image. The filtering unit 104 is used for filtering the binarized image to generate a filtered imag...

Embodiment 2

[0074] On the basis of the detection equipment of the portable network dot area ratio in embodiment 1, this embodiment provides a kind of detection equipment of portable network dot area ratio, refer to figure 2 , the detection device further includes a cropping unit 106 and a display unit 107 . The cutting unit 106 is disposed inside the portable housing, and the display unit 107 is disposed on the outer surface of the portable housing. The display unit 107 is used to display the dot area ratio of the printing plate.

[0075]Cutting unit 106 is used for calculating the quantity Ni of the pixel that value is 1 in each row of pixels of the filtered image, i∈[1, r], wherein r is the row number of the pixel of the filtered image; if the first filtered image The number N1 of pixels with a value of 1 in the row is greater than 0 and less than or equal to Nj, j∈[2,r-1], then delete the first row; if the number of pixels with a value of 1 in the last row of the filtered image Nr is...

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Abstract

The invention discloses a method and equipment for detecting the dot area rate of a printing plate. The detection method comprises the following steps: acquiring a dot image of the printing plate; Carrying out graying processing on the dot image to generate a gray level image; Binarizing the grayscale image to generate a binarized image; Filtering the binary image to generate a filtered image; Andcalculating the ratio of the number of pixels representing the lattice points in the filtered image to the total number of pixels of the filtered image to obtain the lattice point area rate of the printing plate. The detection complexity of the dot area rate of the printing plate is reduced, the detection speed is increased, and the time is saved. Moreover, the invention is beneficial to miniaturization and portability of the dot area rate detection system, and can be conveniently applied to on-site proofing and verification of a flexographic printing system.

Description

technical field [0001] The invention belongs to the technical field of detecting the dot area ratio of printing plates, and in particular relates to a method and equipment for detecting the dot area ratio of printing plates. Background technique [0002] At present, in the process of calculating the dot area ratio of the printing plate, a camera is often used to collect the dot image of the printing plate, and then the dot image is transmitted to a large workstation for calculation. Due to the large size of large workstations, inconvenient operation, complex calculations, and high cost, this solution is difficult to apply to on-site proofing and verification of flexographic printing systems, and the dot area ratio of printing plates cannot be given in real time. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a method and equipment for detecting the dot area ratio of the printing plate in order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/62G06T7/90
Inventor 王文举肖颖刘骏
Owner SHANGHAI PUBLISHING & PRINTING COLLEGE
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