Layer jittery edges

[Lauri Sallisalmi]

Hello! I have a little "problem" in Photoshop. I have copied a text from a picture and made it white. The original photo was a very low resolution and i used the quick selection tool (I don't know the name in English) to copy the text, and after that I got rid of the background and saved it as a png file.
You can see that the edge of the text is very jittery and bumpy on the edges.
I would want the edges to look very sharp and maybe get rid of the grey edges. Could use some help thanks!

The image:




Here's a version in red background to see better:

 

[IamSam]

Hello and welcome to PSG.

You could use the Pen Tool to retrace the letters.
Here is my path around the letter.


Here is that letter with the path filled in white.


Now it's sharp

 

[Lauri Sallisalmi]

Thanks! I'll use that. The only problem is that it's very time consuming and I have a lot of text, but that it will work is enough for me! Thank you IamSam!

 

[IamSam]

I'm sorry, I did try other more faster methods, this was as about as sharp as they were going to get using other tools.........

 

[Lauri Sallisalmi]

Ok. Thank you very much!