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You're reading from  Qt 5 and OpenCV 4 Computer Vision Projects

Product typeBook
Published inJun 2019
Reading LevelIntermediate
PublisherPackt
ISBN-139781789532586
Edition1st Edition
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Author (1)
Zhuo Qingliang
Zhuo Qingliang
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Zhuo Qingliang

Zhuo Qingliang (a.k.a. KDr2 online) is presently working at Beijing Paoding Technology Co. LTD., a start-up Fintech company in China that is dedicated to improving the financial industry by using artificial intelligence technologies. He has over 10 years experience in Linux, C, C++, Python, Perl, and Java development. He is interested in programming, doing consulting work, participating in and contributing to the open source community (of course, includes the Julia community).
Read more about Zhuo Qingliang

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Chapter 5, Optical Character Recognition

  1. How is it possible to recognize characters in non-English languages with Tesseract?

Specify the corresponding language name when initializing the TessBaseAPI instance.

  1. When we used the EAST model to detect text areas, the detected areas are actually rotated rectangles, and we simply use their bounding rectangles instead. Is this always correct? If not, how can this approach be rectified?

It is correct, but this is not the best approach. We can copy the region in the bounding boxes of the rotated rectangles to new images, and then rotate and crop them to transform the rotated rectangles into regular rectangles. After that, we will generally get better outputs by sending the resulting regular rectangles to Tesseract in order to extract the text.

  1. Try to figure out a way to allow users to adjust the selected region after dragging the mouse...
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Qt 5 and OpenCV 4 Computer Vision Projects
Published in: Jun 2019Publisher: PacktISBN-13: 9781789532586

Author (1)

author image
Zhuo Qingliang

Zhuo Qingliang (a.k.a. KDr2 online) is presently working at Beijing Paoding Technology Co. LTD., a start-up Fintech company in China that is dedicated to improving the financial industry by using artificial intelligence technologies. He has over 10 years experience in Linux, C, C++, Python, Perl, and Java development. He is interested in programming, doing consulting work, participating in and contributing to the open source community (of course, includes the Julia community).
Read more about Zhuo Qingliang