CN-122021680-A - Multichannel parallel film strip identification and distribution method and system

Abstract

The invention relates to the technical field of multichannel film strip code recognition, in particular to a multichannel parallel film strip recognition and distribution method and a multichannel parallel film strip recognition and distribution system, wherein a dynamic monitoring unit collects instantaneous fluctuation of a tape running speed and a real-time tension change value of each channel film strip in real time, a self-adaptive calibration unit generates transverse offset and longitudinal distortion compensation factors based on a pre-training distortion influence model, adjusts a characteristic point matching threshold value downwards after superposition, and compensating the influence of physical distortion on the identification precision, calculating a fluctuation index by a stability evaluation unit through a sliding time window, generating an index which is inversely related to the stability of the channel through normalization and linear combination, analyzing bar code quality evaluation information by an intelligent allocation decision unit, calculating comprehensive allocation weight by taking the stability index and the load as main weights in combination, selecting a channel with the highest weight to allocate film strips, forming closed-loop control, and improving the accuracy and allocation efficiency of multi-channel identification.

Inventors

• YANG TAO
• LUO CHENG

Assignees

• 研华科技(中国)有限公司

Dates

Publication Date

20260512

Application Date

20260203

Claims (10)

1. 1. A multichannel parallel film strip identification and distribution method is characterized by comprising the following steps: s1, monitoring the fluctuation amount of the instantaneous tape moving speed and the real-time tension change value of a film tape in each identification channel in real time; s2, based on the instantaneous fluctuation amount of the tape moving speed and the real-time tension change value, calibrating a matching threshold value of the characteristic point of the channel for bar code recognition by a processor, wherein the calibrating direction of the matching threshold value is as follows: Down-regulating along with the increase of the fluctuation amount of the instantaneous tape feeding speed and the real-time tension change value so as to compensate the influence of sampling transverse offset caused by the fluctuation of the instantaneous tape feeding speed and the longitudinal distortion of the bar code caused by the real-time tension change on the matching precision of the characteristic points; S3, calculating fluctuation degree indexes of the fluctuation amount of the instantaneous deck speed of each channel, calculating fluctuation degree indexes of the real-time tension change values of each channel, and finally converting the fluctuation degree indexes of the fluctuation amount of the instantaneous deck speed and the fluctuation degree indexes of the real-time tension change values into channel stability indexes for representing the identification stability of the channel; And S4, when the film strip to be identified needs to be distributed to the identification channel, acquiring bar code quality evaluation information of the film strip to be identified, carrying out weighted calculation by taking the channel stability index as a main weight factor by combining the channel stability index of each channel and the number of the film strips to be processed currently in each channel, generating comprehensive distribution weights of all channels, and selecting the channel with the highest comprehensive distribution weight to distribute the film strip to be identified.
2. 2. The method for identifying and distributing multichannel parallel film strips according to claim 1, wherein a dynamic parameter adjustment module of a processor is used for capturing continuous sampling data of the instantaneous deck speed fluctuation amount and the real-time tension change value in real time, and a nonlinear mapping algorithm is adopted for synchronously associating the input values of the instantaneous deck speed fluctuation amount and the real-time tension change value with calibration coefficients of a matching threshold value, wherein an adaptive calibration engine is built in the processor, a pre-trained distortion influence model is used for superposing a transverse offset compensation factor corresponding to the instantaneous deck speed fluctuation amount and a longitudinal distortion compensation factor corresponding to the real-time tension change value, a real-time down-regulation instruction of the matching threshold value is generated, and finally the bar code identification is driven to call the updated matching threshold value to execute characteristic point matching operation.
3. 3. The method of claim 2, wherein the alignment direction of the matching threshold is defined as: When the fluctuation amount of the instantaneous deck speed is increased, the down-regulation amplitude of the matching threshold value is positively correlated with the fluctuation amount increment of the instantaneous deck speed, when the real-time tension change value is increased, the down-regulation amplitude of the matching threshold value is positively correlated with the fluctuation amount increment of the real-time tension change value, and the down-regulation operation of the matching threshold value by the down-regulation amplitude and the real-time tension change value increment is realized through fusion after the parallel compensation channel operation of the self-adaptive calibration engine.
4. 4. The method for identifying and distributing the multichannel parallel film strips according to claim 2, wherein the transverse deviation compensation factors reduce the transverse tolerance range of feature point matching, offset pixel displacement errors in the motion direction of the film strips, and relax the longitudinal deformation tolerance of feature point matching through the longitudinal distortion compensation factors, so that the bar code identification is adapted to the elastic tensile deformation of bar code units, and the two compensation effects adjust the matching threshold through the weighted output of the parallel compensation channels, so that the feature point matching precision is kept stable under the physical distortion condition.
5. 5. The method for identifying and distributing the parallel film strips of multiple channels according to claim 1, wherein when the fluctuation degree index of the fluctuation amount of the instantaneous tape running speed of each channel is calculated, the fluctuation amount data of the instantaneous tape running speed continuously monitored by each channel is counted by adopting a sliding time window, variance is extracted as a first fluctuation quantized value, and when the fluctuation degree index of the real-time tension variation value of each channel is calculated, the extreme difference of the real-time tension variation value is counted by adopting the same time window as a second fluctuation quantized value, wherein the width of the sliding time window is set in a time-consuming association with the single-frame identification of the film strips.
6. 6. The method for identifying and distributing the multichannel parallel film strips according to claim 1, wherein the first fluctuation quantized value and the second fluctuation quantized value are respectively normalized to dimensionless parameters and then are input into a preset index fusion model for linear combination, the normalization result of the first fluctuation quantized value is given to a first weight coefficient, the normalization result of the second fluctuation quantized value is given to a second weight coefficient, the first weight coefficient is larger than the second weight coefficient, the finally output channel stability index is in negative correlation with the linear combination result, and the index fusion model is executed by a stability evaluation module built in the processor.
7. 7. The method of claim 1, wherein the barcode quality assessment information comprises a barcode edge ambiguity score, a barcode unit wear level and a characteristic point contrast, wherein the barcode edge ambiguity score and the barcode unit wear level are used as main quality degradation indexes, and the characteristic point contrast is used as an auxiliary quality index, and the three are weighted to generate a quality assessment integrated value.
8. 8. The method for identifying and distributing multichannel parallel film strips according to claim 7, wherein the weighting calculation by taking the channel stability index as a main weighting factor comprises the following steps: And taking the reciprocal of the channel stability index, converting the number of the current film strips to be processed of each channel into a channel stability weight base value, and finally carrying out weighted superposition according to a preset rule that the stability weight base value occupies a significant proportion and the channel load coefficient occupies a minor proportion to generate comprehensive distribution weight of each channel, wherein when the quality evaluation comprehensive value is lower than a set degradation threshold value, the duty ratio of the channel stability weight base value is automatically improved.
9. 9. The method of claim 7, wherein when the channel with the highest comprehensive allocation weight is selected to allocate the film strip to be identified, binding the film strip to be identified to an identification queue of the selected channel through a distributed task scheduler, synchronizing the latest instantaneous tape speed fluctuation amount and the real-time tension change value of the channel to the adaptive calibration engine to realize threshold pre-calibration, requesting the stability evaluation module to update the channel stability index, and finally sending a channel load increment signal to refresh the comprehensive allocation weight to form a closed-loop control link.
10. 10. A system for implementing a multi-channel parallel film strip identification distribution method as in any of claims 1-9, comprising: the dynamic monitoring unit (1) is deployed in the sensing network of each identification channel and is used for collecting the fluctuation amount of the instantaneous tape running speed and the real-time tension change value of the film tape in real time; the self-adaptive calibration unit (2) is internally provided with a pre-trained distortion influence model and a nonlinear mapping algorithm, generates a transverse offset compensation factor and a longitudinal distortion compensation factor based on the fluctuation amount of the instantaneous deck speed and the real-time tension change value, outputs a real-time down-regulation instruction of a matching threshold after superposition, and drives a bar code to recognize and regulate the matching threshold of a characteristic point; The stability evaluation unit (3) calculates a range index of the fluctuation amount of the instantaneous deck speed and a real-time tension change value through a sliding time window, and generates a channel stability index which is inversely related to the channel stability through linear combination of normalization processing and a preset weight coefficient; The intelligent distribution decision unit (4) generates a quality evaluation comprehensive value by analyzing bar code quality evaluation information of the film strip to be identified, invokes a channel stability index, combines the current load quantity of each channel, performs weighted fusion calculation by taking the stability index as a main weight factor to generate comprehensive distribution weight, selects a channel with highest comprehensive distribution weight, and binds the film strip to be identified through a distributed queue to form a closed loop control link.

Description

Multichannel parallel film strip identification and distribution method and system Technical Field The invention relates to the technical field of multichannel film strip code recognition, in particular to a multichannel parallel film strip recognition and distribution method and system. Background The multichannel film strip code recognition technology is an important technology, is particularly applied to the bar code recognition and distribution links of multichannel parallel film strips, and has the core that the accurate matching of bar codes and channels is realized by compensating the physical fluctuation influence and quantifying the channel stability, the core requirements of film strip recognition on efficiency and accuracy are adapted, when the multichannel parallel film strips are recognized, the instantaneous tape feeding speed of the film strips can generate natural fluctuation, the real-time tension can also change along with the tape feeding state, because the two physical fluctuations can respectively lead to transverse offset and longitudinal distortion of bar code sampling and influence characteristic point matching precision, so that the recognition stability of each recognition channel is different, and the bar codes of the film strips to be recognized are different in quality, if the channels are distributed according to only a single dimension, the bar codes with poor quality can be distributed to the unstable channels, the recognition success rate is further reduced, and in order to solve the technical problem, the method and the system for recognizing and distributing the multi-channel parallel film strips are provided. Disclosure of Invention The invention aims to provide a multichannel parallel film strip identification and distribution method and system for solving the problems in the background technology. In order to achieve the above object, one of the objects of the present invention is to provide a multi-channel parallel film strip identification and distribution method, comprising the steps of: s1, monitoring the fluctuation amount of the instantaneous tape moving speed and the real-time tension change value of a film tape in each identification channel in real time; s2, based on the instantaneous fluctuation amount of the tape moving speed and the real-time tension change value, calibrating a matching threshold value of the characteristic point of the channel for bar code recognition by a processor, wherein the calibrating direction of the matching threshold value is as follows: Down-regulating along with the increase of the fluctuation amount of the instantaneous tape feeding speed and the real-time tension change value so as to compensate the influence of sampling transverse offset caused by the fluctuation of the instantaneous tape feeding speed and the longitudinal distortion of the bar code caused by the real-time tension change on the matching precision of the characteristic points; S3, calculating fluctuation degree indexes of the fluctuation amount of the instantaneous deck speed of each channel, calculating fluctuation degree indexes of the real-time tension change values of each channel, and finally converting the fluctuation degree indexes of the fluctuation amount of the instantaneous deck speed and the fluctuation degree indexes of the real-time tension change values into channel stability indexes for representing the identification stability of the channel; And S4, when the film strip to be identified needs to be distributed to the identification channel, acquiring bar code quality evaluation information of the film strip to be identified, carrying out weighted calculation by taking the channel stability index as a main weight factor by combining the channel stability index of each channel and the number of the film strips to be processed currently in each channel, generating comprehensive distribution weights of all channels, and selecting the channel with the highest comprehensive distribution weight to distribute the film strip to be identified. Another object of the present invention is to provide a system for implementing a multi-channel parallel film strip identification and distribution method including any one of the above, comprising: the dynamic monitoring unit is deployed in the sensing network of each recognition channel and is used for collecting the instantaneous fluctuation of the tape feeding speed and the real-time tension change value of the film tape in real time; the self-adaptive calibration unit is internally provided with a pre-trained distortion influence model and a nonlinear mapping algorithm, generates a transverse offset compensation factor and a longitudinal distortion compensation factor based on the fluctuation amount of the instantaneous deck speed and the real-time tension change value, outputs a real-time adjustment instruction of a matching threshold after superposition, and drives a bar code to recognize the matching thresh