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Problems in recognising text with OCR from clear logical array

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Hello, I have a clean image containing only some lines of text. It is the result of exporting a logical array of pixels.
Using OCR command, TEXT property results to be empty. I tried with jpg and png format, as in the attached figures.
The code I am using is just
xxx=imread(name_file);
ocr(xxx)
ans =
ocrText with properties:
Text: ''
CharacterBoundingBoxes: [0×4 double]
CharacterConfidences: [0×1 single]
Words: {0×1 cell}
WordBoundingBoxes: [0×4 double]
WordConfidences: [0×1 single]
TextLines: {0×1 cell}
TextLineBoundingBoxes: [0×4 double]
TextLineConfidences: [0×1 single]
Thank you very much

Accepted Answer

Jonas
Jonas on 30 Jan 2024
i guess it is just a mishandling of the automatic mode recognition:
I=imread('testOCR.png');
I=rgb2gray(I);
imshow(I);
c=ocr(I,"LayoutAnalysis","block");
c.Words
ans = 4×1 cell array
{'122591'} {'1EHEOE'} {'d1596M'} {'MTSEPL'}
since this contains errors, you could try to blur out the edges, maybe this helps :D
J=imgaussfilt(I,4);
J=imsharpen(J,'Radius',4,'Amount',4);
imshow(J);
c=ocr(J,"LayoutAnalysis","block");
c.Words
ans = 4×1 cell array
{'132831'} {'1BHEOR'} {'41896M'} {'MTSGPU'}
this is better, but still not without errors (3 instead of 9 in the first line). maybe this can help you do change your image in such a way, that it can work

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R2023a

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