How to convert from tiff/jpeg/psd to eps format without losing quality?

[hajime]

Hello, I imported a tif file to Photoshop CS6. Then, I added text and arrows for annotations. Since CS6 cannot export or save as eps format for inclusion in latex document, I saved the file into jpeg format. Still looking good. Then, I used Graphic Converter to convert the file to eps format. When I opened the eps file by double clicking on it or via latex, the image quality dropped. Smooth stright lines became jagged lines while the boundary of the circle became dotted line. Anybody knows how to convert from tif to eps, jpeg to eps or photoshop psd to eps without losing image quality?

I am using TeXShop 3.73.

 

[chrfr]

Since CS6 cannot export or save as eps format for inclusion in latex document

Photoshop: Save as, select "Photoshop EPS" format.
You can't keep resolution independent features like lines and arrows in a JPEG, so by saving it as a JPEG, everything becomes pixels, and will lose quality. An EPS can either be raster or vector, and by making a JPEG, you have a raster EPS file. EPS is really just a "container" for other image data and as such can be a lot of things.
You should probably place your image into Illustrator, add the annotations there, then place that into Latex, but I'm not specifically familiar with that workflow so that may also not work as expected.

 

[hajime]

Photoshop: Save as, select "Photoshop EPS" format.
You can't keep resolution independent features like lines and arrows in a JPEG, so by saving it as a JPEG, everything becomes pixels, and will lose quality. An EPS can either be raster or vector, and by making a JPEG, you have a raster EPS file. EPS is really just a "container" for other image data and as such can be a lot of things.
You should probably place your image into Illustrator, add the annotations there, then place that into Latex, but I'm not specifically familiar with that workflow so that may also not work as expected.

Thanks. I tried to use Illustrator to annotate already. The original image is in tiff format. When I imported it to Photoshop CS6, it looked fine (e.g. lines were smooth and straight). However, when I placed it to Illustrator CS6, the image quality dropped immediately (e.g. lines became jagged, dotted). That is why I did the annotation in Photoshop.

 

[chrfr]

Thanks. I tried to use Illustrator to annotate already. The original image is in tiff format. When I imported it to Photoshop CS6, it looked fine (e.g. lines were smooth and straight). However, when I placed it to Illustrator CS6, the image quality dropped immediately (e.g. lines became jagged, dotted). That is why I did the annotation in Photoshop.

The preview of the image you're seeing in Illustrator is not necessarily representative of the final quality of the output. It may be a lower resolution image to speed display performance. If you are scaling the TIFF up you will then have problems with image quality.

 

[hajime]

The preview of the image you're seeing in Illustrator is not necessarily representative of the final quality of the output. It may be a lower resolution image to speed display performance. If you are scaling the TIFF up you will then have problems with image quality.

Thanks. What do you mean by scaling the TIFF up? So, what workflow do you recommend?