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When vectorising a jpeg image (OK, not a true vectoring, but creating vector paths for layer masks which create a crisp "vector like" images when resized) the process of selecting the outline using the Magic Wand or Quick Selection Tool and creating a work path creates a large number of anchor points which ultimately whilst working on the image, you don't need.

enter image description here

When using the Direct Selection tool, you can select a number of anchor points by dragging a selection box around them, and when you press the delete button, you can delete the anchor points, but it will split the workpath open.

How do you delete multiple achor points whilst keeping the workpath closed?

I have tried shift+delete and the same happens.

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    You should do that in the program you used to vectorize the image. – Danielillo Jul 30 '18 at 10:55
  • I am. I am vectorising using Photoshop. OK, not a true vectoring, but creating vector paths for layer masks which create a crisp "vector like" images when resized. – Chris Rogers Jul 30 '18 at 11:03
  • Can you possibly show what the problem is? Why do the paths have a large number of anchors? Did you create them that way? If so, the problem could be solved by creating paths with fewer anchors in the first place. Also, Photoshop has only very limited vector support. It wouldn't be my choice for creating vector images. – Billy Kerr Jul 30 '18 at 11:04
  • @BillyKerr - Please see my question edit for example of excess anchor points after selecting the outline and then clicking "create work path" – Chris Rogers Jul 30 '18 at 11:10
  • That isn't a good way to create vectors - as I said, Photoshop is not really the right software. I suppose you could use the Pen Tool to create the vectors manually, or alternatively you could import the graphic into vector software like Illustrator or Inkscape, and auto trace the image, then you could simplify the vectors if there are still too many anchors. – Billy Kerr Jul 30 '18 at 11:22
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Photoshop is not a program optimized for advanced vector work despite having vector tools. The specific vector manipulation options such as the one referred in the question, can only be found in vector drawing programs such as Illustrator or Inkscape.

I suppose you have done the vectorization from a selection using Make Worth Path, obviously those vectors are not useful. Delete them.

You must do it again by changing the Tolerance, the greater the number of tolerance, the fewer nodes but more imprecision.

  • With a selection go to the Path Panel Menu> Make Work Path

Make Path

Tolerance

  • This answer is useful for future reference (I am already half-way through the complete image which has taken me hours) but what about my question? Is there a way to delete multiple anchor points or am I just going to have to delete each anchor point individually one by one? – Chris Rogers Jul 30 '18 at 12:16
  • See the updated answer – Danielillo Jul 30 '18 at 12:27
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I don't know why I didn't think of this before.

Move some of the anchors to roughly where you want them, and leave the excess.

rough vector anchoring with excess anchors

When using the Direct Selection tool, you can select a number of anchor points by dragging a selection box around them.

selection box around anchor points to be deleted

When you realease the mouse, all the anchor points selected within the box turn blue.

When you press the delete button, the blue anchor points are removed, but the workpath will be open.

Open workpath

You can use the pen tool to draw a line connecting the two open anchor points to close them back up. This is much quicker than deleting each individual anchor point one by one.

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