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I want to draw an image pixel by pixel using Manipulate. My code almost works but it erases the old points each time.

image0 = Image[Table[0, {x, 1, 512}, {y, 1, 680}]]

Manipulate[
  ReplacePixelValue[image0, coordList[[i]] -> 1], 
  {i, 1, Length @ coordList}]

coordList is the list of the pixels that get changed from 0 to 1 in the image.

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    $\begingroup$ you should show us coordList $\endgroup$
    – Mike Honeychurch
    Commented Jan 12, 2016 at 21:47
  • $\begingroup$ Best for you to use your simpler solution rather than the answer that was posted given it was not acceptable $\endgroup$
    – Mike Honeychurch
    Commented Jan 18, 2016 at 22:06
  • $\begingroup$ @MikeHoneychurch, I need to post my answer, could you reopen the question, please. $\endgroup$
    – BetterEnglish
    Commented Jan 21, 2016 at 16:51

1 Answer 1

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emptyImage = Image[Table[0, {i, 1, 300}, {j, 1, 400}]]

coordList=RandomInteger[{100,200},300,2];

Manipulate[ReplacePixelValue[emptyImage, coordList[[1 ;; i]] -> 1], {i, 1, Length[coordList], 1}]
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