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Remove underlines from image for ocr
Posted: 2018-06-20T00:40:17-07:00
by wineismine
I need to remove lines from the following image without affecting the characters
Code: Select all
magick 21.gif -monochrome ( +clone -negate -statistic median 219x1 ) -compose lighten -composite q1.png
Re: Remove underlines from image for ocr
Posted: 2018-07-04T05:42:38-07:00
by wineismine
anyone?
Re: Remove underlines from image for ocr
Posted: 2018-07-04T06:10:19-07:00
by snibgo
It can be done, but I can't see an easy way.
Each pixel that is removed may have had neighbours in three positions on the previous row (up, up-left and up-right), and neighbours in three positions on the following row.
For some combinations of neighbours, you want to replace the pixel that was removed. For others, you don't.
I don't have enough time to work out the details.
Re: Remove underlines from image for ocr
Posted: 2018-07-04T07:20:26-07:00
by wineismine
snibgo wrote: ↑2018-07-04T06:10:19-07:00
It can be done, but I can't see an easy way.
Each pixel that is removed may have had neighbours in three positions on the previous row (up, up-left and up-right), and neighbours in three positions on the following row.
For some combinations of neighbours, you want to replace the pixel that was removed. For others, you don't.
I don't have enough time to work out the details.
could you give me some example codes to try?
Re: Remove underlines from image for ocr
Posted: 2018-07-04T11:46:53-07:00
by snibgo
Another approach is
Mending broken lines, but mask this so mending occurs only where horizontal lines have been removed.