Intelligent detection method for positioning printed film based on machine vision
By performing grayscale equalization and feature extraction on images of the printing film production line, and combining them with a deviation discrimination model, the problem of single detection and evaluation criteria in existing technologies has been solved. Stable feature extraction and quantitative change detection of printing marks and film edges have been achieved, making it suitable for high-precision detection under complex working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YICHANG LANTIAN COLOR PRINTING CO LTD
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing machine vision inspection methods lack standardized image enhancement processing in printed film production, and cannot simultaneously take into account the position and state of printed marks and the changes in the shape of the film edge. This results in a single basis for inspection and evaluation, and it cannot adapt to the stable extraction of image features and the synchronous quantitative determination of positioning and deformation states under complex working conditions.
By performing grayscale distribution histogram equalization on multiple frames of raw images continuously acquired on the printing film production line, the corner coordinates of the printing marks and the pixel trajectory of the film edge are extracted. The displacement vector and deformation curvature are calculated and input into a pre-trained deviation discrimination model to generate printing positioning deviation confidence and film deformation confidence, triggering a detection alarm signal.
It achieves stable feature extraction of printing marks and film edges, can quantitatively characterize position and morphological changes, expands the dimensions of detection and evaluation, and adapts to the high-precision, full-dimensional online detection needs in the continuous production process of printed films.
Smart Images
Figure CN122415591A_ABST