If you are happy with the way it looks, go to the next step. If you are not happy yet, then try changing the threshold value.



The Threshold value tells illustrator where we want to trace our lines. All pixels lighter than the Threshold value are converted to white, all pixels darker than the Threshold value are converted to black.



On the black to white color scale, black is 1 and white is 255; any number in between is some shade of gray.



The threshold value can be any number between 1 and 255. For most images, you'll find that the middle (128) is good. But if you don't like the way your image looks in the preview, you can adjust your Threshold value to see if if looks better.



Try 100. Does it look better? Try 200. Does that look better? Adjust the value until you're happy.



If you just can't get it to look right, then your image probably wasn't suitable to start with. Remember it's best to start with high contrast images: images that have dark darks and light lights and not too much in between.