Image EditingLesson 216Free preview
Image to Text (OCR)
This lesson is part of Web Developer Tools · All levels
Summary
OCR, or optical character recognition, transforms text that appears in an image into digital text that can be edited and searched for. The quality of the result is highly influenced by the resolution, contrast, type of letter, and language chosen. OCR results always need to be checked because characters that are similar like O and 0 or l and 1 are often exchanged.
Key points
- OCR detects the shape of the letter and then converts it into a digital character.
- Blurred, slanted, or low-resolution images reduce accuracy
- Choose the right language to get the dictionary and the correct spelling pattern
- Preprocessing such as grayscale, threshold, and deskew helps
- Always proofread the results, especially the numbers, names, and punctuation
Full lesson
Code examples and quizzes
Full lessons, code examples, and quizzes are available to subscribers. 5 questions.