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Engineering drawing review recognition processing method and device for manual instrument drawing

An instrument drawing and recognition processing technology, which is applied in image data processing, instruments, graphics and image conversion, etc., can solve the problems of confusing manual drawing of lines, low proofreading efficiency, and high work intensity, so as to alleviate the shortage of training data, The effect of high degree of automation and risk reduction

Pending Publication Date: 2021-11-16
ZHEJIANG UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems of a wide variety of geometric features in manual instrument drawing, easily confused lines and styles, and various manual drawing styles, the traditional manual proofreading mode is not only labor-intensive, but also has low proofreading efficiency, and there are serious cases of mis-picking and missed-checking

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  • Engineering drawing review recognition processing method and device for manual instrument drawing
  • Engineering drawing review recognition processing method and device for manual instrument drawing
  • Engineering drawing review recognition processing method and device for manual instrument drawing

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Embodiment Construction

[0054] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0055] Such as figure 1 Shown, the embodiment of the patent of the present invention comprises the following steps:

[0056] Take photos and samples of engineering drawings through industrial cameras, preprocess the obtained engineering drawings, remove background and noise points, obtain target areas, and use data enhancement methods such as small-scale rotation, horizontal and vertical displacement, and adding noise interference. The coll...

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Abstract

The invention discloses an engineering drawing review recognition processing method and device for manual instrument drawing. The method comprises the following steps: photographing the engineering drawing by using a camera to obtain an original image of the engineering drawing; pre-processing an engineering pattern, and acquiring a feature projection image; performing DenseNet network training: expanding a data set through data enhancement, training a DenseNet network on an ImageNet training set to obtain a DenseNet recognition model, carrying out fine tuning and multiple iterative training on the DenseNet recognition model on a key area data set until the number of training times reaches an initial set value, and storing a training result at the moment; and marking the drawing of the engineering drawing manual instrument, and processing the key feature region image in a DenseNet recognition model to obtain a marking processing result. The engineering drawing drawn by the manual instrument can be reviewed, and the method has relatively high error recognition rate and robust performance.

Description

technical field [0001] The invention belongs to an image recognition processing method in the technical field of automatic detection, in particular to an engineering drawing review recognition processing method and device for manual instrument drawing. Background technique [0002] Engineering drawings are the basis for the production of mechanical products. Standardized drawing is an important basis for ensuring the correctness, integrity and unity of product drawings. It is of great significance to the information transmission among product design, manufacturing and inspection. Problems with fonts, line types, visibility, and layout of drawings in manual instrument drawing lead to errors in drawing recognition and seriously affect the production quality of products. Although computer-aided CAD drawing is being widely used in the process of mechanical drawing, manual instrument drawing, as the basic skill of mechanical drawing that engineers and technicians must master, is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/12G06T7/13G06T5/00G06T5/20G06T3/00G06K9/62
CPCG06T7/0004G06T7/11G06T7/12G06T7/13G06T5/20G06T2207/20024G06T2207/20081G06F18/214G06T3/02G06T5/90G06T5/70
Inventor 高一聪王彦坤李康杰
Owner ZHEJIANG UNIV
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