Architectural drawing automatic comparison method and device

A technology for architectural drawings and automatic comparison, applied in the computer field, can solve problems such as large memory, computer consumption, and complex code.

Inactive Publication Date: 2019-06-07
滨州建筑工程施工图审查中心
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Problems solved by technology

In theory, this is equivalent to the "Hamming distance". If the number of different data bits is small, it means that the two images are very similar. If the number of different data bits is large, it means that they are two different images. The code will be more complicated to implement this method
The method of element-by-element comparison is to extract the RGB value of each pixel of the picture, and then compare the RGB value of each pixel of the two pictures. Since each pixel must be compared with all the pixels of the other picture, this method requires Consumes a lot of computer memory and runs slowly

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  • Architectural drawing automatic comparison method and device
  • Architectural drawing automatic comparison method and device
  • Architectural drawing automatic comparison method and device

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[0071] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0072] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0073] Such as figure 1 As shown, the method for automatic comparison of architectural drawings according to an embodiment of the present invention includes:

[0074] S102, obtaining the architectu...

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Abstract

The invention provides an architectural drawing automatic comparison method and device, and the method comprises the steps: obtaining PDF-format architectural drawings which need to be compared; converting the PDF format architectural drawing into a corresponding picture format image; overlapping and comparing the picture format images, determining different image element points, and labeling; andconverting the labeled picture format image into a PDF format for storage. By means of the technical scheme, automatic comparison of the PDF-format architectural drawings is achieved under the condition that compatibility and the calculation speed are guaranteed and the code complexity degree is reduced, automatic comparison result consulting is facilitated, and then the examination efficiency ofthe architectural drawings is improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an automatic comparison method for architectural drawings and an automatic comparison device for architectural drawings. Background technique [0002] The current picture similarity comparison methods mainly include perceptual hash algorithm and element-by-element comparison method. The principle of perceptual hash algorithm includes the following steps: 1. Scale the picture to a certain size, 2. Convert the picture into a grayscale picture, 3. 1. Calculate the average value of all pixels. 4. Compare the gray level of each pixel with the average value. If it is greater than the average value, it will be recorded as 1, and if it is less than the average value, it will be recorded as 0. 5. Calculate the hash value and combine the comparison results of the previous step. , forming a 64-bit integer. In theory, this is equivalent to the "Hamming distance". If the number of differen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 吴国建
Owner 滨州建筑工程施工图审查中心
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