Get time from the clock image in Matlab - Image Processing

2011 11 21
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更新时间：2021 6 14
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I am wondering to know how I can read time from an image in matlan, Can anybody help me?

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Walter Roberson
Walter Roberson 2011-11-21
Sample images would help. For example are the clocks analog or digital? Is it a 12 hour clock, a 24 hour clock, a novelty bar clock (that runs backwards), a metric clock (10 total periods per day), a clock that outputs in binary?
Walter Roberson
Walter Roberson 2011-11-21
编辑：Walter Roberson 2021-6-13
So for example it would look like this?
http://www.oliverbothwell.co.uk/img/thumbs/clock2.gif
Is noon / midnight always going to be "up" in the image, or will the images appear with different rotations?
sareh
sareh 2011-11-21
yes, you are right, you know how to solve it with matlab
sareh
sareh 2011-11-21
The image will be up for noon/midnight
sareh
sareh 2011-11-21
编辑：Walter Roberson 2021-6-13
Walter Roberson already put a link which is the one I search for : http://www.oliverbothwell.co.uk/img/thumbs/clock2.gif
Walter Roberson
Walter Roberson 2011-11-21
I suggest you take a close look at that clock image, Sareh.

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Walter Roberson
Walter Roberson 2011-11-21

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sareh
sareh 2011-11-21
Thank you very much, but the idea is to do it by coding not a function directly on matlab,
sareh
sareh 2011-11-21
I mean, I dont know how to start the idea to do this algorithm and find out the length of each handle and reading time
Walter Roberson
Walter Roberson 2011-11-21
Dave Robinson's answer in that thread describes how to do it by coding.
sareh
sareh 2011-11-21
I have found the file, thank you very much,
Sparsh Raj
Sparsh Raj 2021-6-13
The link for the thread is not working.
Image Analyst
Image Analyst 2021-6-13
@Sparsh Raj, the link for "Posting sample images" via a third party web site no longer applies. Now you can attach your images right here, in the MATLAB Answers forum, with the paperclip icon, or insert them into the body of your post with the frame icon. So, consequently we will not repair the link or find a susbtitute since that way of including pictures is no longer needed.
Walter Roberson
Walter Roberson 2021-6-13
The newsreader thread does not work though...
Walter Roberson
Walter Roberson 2021-6-13
Are the images analog or digital?
I did find an old Dave Robinson thread about reading times from digital images; https://comp.soft-sys.matlab.narkive.com/d3iOKQ51/extracting-numbers-from-an-image
Sparsh Raj
Sparsh Raj 2021-6-14
@Walter Robinson the images are of analog clocks
Image Analyst
Image Analyst 2021-6-14
Since the hands could be at virtually any relative angle, but you know that they touch at the center, I'd be tempted to try to train a neural network to find them, and even to predict the time.

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Image Analyst
Image Analyst 2011-11-21

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Depending on the clock image(s), this could be very easy. You could just extract two circles and detect where the hands cross the circles. Of course this could get very complicated for watch faces that have a lot of clutter on them such as patterns, extra dials and hands, etc. It's best if you just upload 3 or 4 of your practice/test images so we can see what you're working with. You haven't done that yet despite two requests (now three) for you to do so.

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sareh
sareh 2011-11-21
I am learning image processing and I am wonder to know how to get time from a clock, I have uploaded one image here, http://www.sendspace.com/file/dimz27

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