Automator Apple Script to convert jpeg image - applescript

Question

I used below automator function to convert png image to jpeg in bulk. It worked fine and converted all images in folder at once. But quality of jpeg image is not full.
Image 1: Automator Functions
Image 2: Preview App shows quality of image. How can we do same in automator above function ?

Answer 1

Unfortunately this functionality is just not available in that Action (weirdly). I would suggest using the "Run Shell Script" Action.
[EDIT: I've replaced everything here with new graphic and thorough explanation.]
Explanation:
In the red box:
These are the Actions. There are 5. There are 2 Run Shell Script Actions, one directly following the other.
In the green box:
These are the details for the Actions.
1: Ask for Finder Items:
Type: Folders
Do NOT Allow Multiple Selection
2: Get Folder Contents:
You may use "Repeat for each subfolder found" if you wish
3: Run Shell Script:
Pass Input: as arguments
The script:
for f in "$#"
do
sips -s format jpeg -s formatOptions 100 "$f" --out "${f%.png}.jpg";
#rm "$f";
echo "${f%.png}.jpg"
done
4: Run Shell Script:
Pass Input: as arguments
The script:
for f in "$#"
do
echo "$f" | grep .jpg
done
5: Move Finder Items:
To: [select your folder]
NOTE: To be safe, I have commented out the "rm" line in the first Run Shell Script script (put a "#" in front of it) for testing. This is the line that deletes the PNG files. If everything works after testing, you can remove the "#".

Answer 2

Hello you may have to install ImageMagick, since I am not sure you can write an AppleScript or something to make Preview use a better quality, and I can't finde any user preferences setting for quality in the user defaults database. It may exist, but I haven't found it.
Here is a link with some info on ImageMagick: Command-line Tools: Convert I think your best choice is to use an execute unix script action, after having converted the paths from finder, or the folder from finder, and have a shell script inside the action, that performs the converstion with the desired quality for you.
New (for the case that it is impossible to make CRGreens solution to work, see comments below)
We will need to have the folder where your images that are to be converted to along the way, so I suggest you put the AppleScript below into a "run applescript action" in a new workflow, then select the folder where the conversion occur in finder, before you run the workflow you just created, then hit "Cmd-V" in a new TextEdit document, so you have it for later.
on run {input, parameters}
tell application "Finder"
if selection is not {} then
set theSel to selection as alias list
end if
end tell
if theSel is not {} then
set theFol to item 1 of theSel
set the clipboard to "cd " & quoted form of POSIX path of theFol
else
beep
end if
end run
Save and close the Automator workflow, in case you'll need it on another occation.