how to get an image with clear edges

[Steve_Lee]

Hi, All

I'm trying to obtain an image with clear edges. I attached two images. The first image is the original one. The second image is after a threshold processing. But on both sides the image still shows bad edges. Is there a way to clean them and make it looks better? I tried to use fill hold vi, it helped to some extent but couldn't solve it all.

Thank you for the help.

Regards

Steve

[rpursley8]

Apply and lowpass filter in the vertical direction and then threshold.

[VGA_CD-ROM]

I just tried rpursley8's suggestion and it works pretty well. You might try some other filters such as median and play with their settings some more. Since you posted your sample images as JPEG files, it is hard to know if the "noise" in the image that I tried to filter out is always due to the source or JPEG compression artifacts. I took your Original.jpg above and put it through a smoothing/median filter, then a thresholding step, then a morphology (Open) step to remove some extraneous speckles. The result I saw is attached.

[Steve_Lee]

Thank you, rpursley8 and VGA CD-ROM.

I'll try your suggestions and let you know the result.

Regards

Steve

[Steve_Lee]

Thanks, Vijay S.
It works great.