Simple script for resize, crop and optimize jpg Post: 303025768

Sponsored Content

Top Forums Shell Programming and Scripting Simple script for resize, crop and optimize jpg Post 303025768 by danjde on Monday 12th of November 2018 05:43:44 AM

11-12-2018

Registered User

WAW! A real lesson in code development!
I would never have thought of such a complete and authoritative answer!
I'm really very grateful! I'll show your answer to some friends I think they'll be amazed!

Regarding what you suggest, it is believed that the utility "file" could be very useful.
Also find the way to not process files already modified by the script.
Unfortunately I do not know if I will succeed in the enterprise, but I try, but give me "some time" to process everything (I'm still under shok! :-))...

Regarding the environment in use you're absolutely right, I forgot to specify it, I'm in a Debian Jessie (Bourne shell), can the script work?
I'll try!

If I can complete it I would like to publish it (not for personal glory, but only to help other people like me who are looking for something like this. You must to know that my search started for a Joomla plugin that had such features, but I did not find it, and I thought it could help GNU Linux!) on GitLab, what do you think about? ;-)

Thanks again!

Davide

------ Post updated at 10:43 AM ------

...relatively "file" utility I read that it would be preferable for safety reasons "identify": h t t p s : / / unix.stackexchange.com/questions/189364/script-to-determine-if-files-are-images

I have to deepen in the coming days..

Thanks again!

Davide

This User Gave Thanks to danjde For This Post:

danjde

View Public Profile for danjde

Find all posts by danjde

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

optimize the script

Hi, I have this following script below. Its searching a log file for 2 string and if found then write the strings to success.txt and If not found write strings to failed.txt . if one found and not other...then write found to success.txt and not found to failed.txt. I want to optimize this...

2. UNIX for Dummies Questions & Answers

Can we optimize this simple script ?

Hi All , I am just a new bie in Unix/Linux . With help of tips from 'here and there' , I just created a simple script to 1. declare one array and some global variables 2. read the schema names from user (user input) and want2proceed flag 3. if user want to proceed , keep reading user...

3. UNIX for Dummies Questions & Answers

optimize shell script (snapshots)

I've a script to do some snapshots but the time it does so is very different... once i got a snapshot under 1 sec, on the other hand it took 3 sec, but nothing else changed, i didnt even move the cursor or something. I put the script on a ramdisk and its faster, but still swing from under 1...

4. Shell Programming and Scripting

Simple BASH shell script to rename webcam jpg and copy into a new directory.

System: Ubuntu Intrepid Ibex I'm running webcamd as a sort of "security" program, but I need a script that will archive my webcam.jpg files. So, take the following file: /home/slag/www/webcam.jpg Rename it--preferably with a time stamp. Place it in say: /home/slag/www/history/ ...

5. Shell Programming and Scripting

find jpg's mkdir script help

I am having a problem getting this to work right. The script needs to search through directories and subdirectories. If a jpg is found then create a folder in that directory, so on and so forth. Here is what I have so far but it doesn't work right. Help please #!/bin/bash for d in `find ./...

6. Shell Programming and Scripting

Optimize and Speedup the script

Hi All, There is a script (test.sh) which is taking more CPU usage. I am attaching the script in this thread. Could anybody please help me out to optimize the script in a better way. Thanks, Gobinath

7. Emergency UNIX and Linux Support

Help to optimize script running time

Dear Forum experts I have the below script which I made to run under bash shell, it runs perfectly for low records number, let us say like 100000. when I put all records (3,000,000), it's takes hours can you please suggest anything to optimize or to run in different way :-| {OFS="|";...

8. UNIX for Dummies Questions & Answers

optimize if block : shell script

Hi, I need a shell script to determine if a no. is either even, greater than 4, less than 8 SHELL : ksh OS : RHEL 6 this is the if block of the script mod=`expr $num % 2` if || || then echo "No. is either even or greater than 4 or less than 8" fi this code works...

9. Shell Programming and Scripting

Optimize my mv script

Hello, I'm wondering if there is a quicker way of doing this. Here is my mv script. d=/conversion/program/out cd $d ls $d > /home/tempuser/$$tmp while read line ; do a=`echo $line|cut -c1-5|sed "s/_//g"` b=`echo $line|cut -c16-21` if ;then mkdir...

10. Shell Programming and Scripting

Help Optimize the Script Further

Hi All, I have written a new script to check for DB space and size of dump log file before it can be imported into a Oracle DB. I'm relatively new to shell scripting. Please help me optimize this script further.

LEARN ABOUT DEBIAN

puzzle-diff

PUZZLE-DIFF(1)															    PUZZLE-DIFF(1)

NAME

       puzzle-diff - Compare pictures with libpuzzle

SYNOPSIS

       [-b <contrast barrier for cropping>] [-c] [-C <max cropping ratio>] [-e] [-E <similarity threshold>] [-h] [-H <max height>] [-l <lambdas>]
       [-n <noise cutoff>] [-p <p ratio>] [-t] [-W <max width>] <file 1> <file 2>

DESCRIPTION

       puzzle-diff compares two pictures and outputs the normalized distance.

       Try puzzle-diff -h for more info.

EXAMPLES

       Output distance between two images:

	 $ puzzle-diff pic-a-0.jpg pics-a-1.jpg
	 0.102286

       Compare two images, exit with 10 if they look the same, exit with 20 if they don't (may be useful for scripts):

	 $ puzzle-diff -e pic-a-0.jpg pics-a-1.jpg
	 $ echo $?
	 10

       Compute distance, without cropping and with computing the average intensity of the whole blocks:

	 $ puzzle-diff -p 1.0 -c pic-a-0.jpg pic-a-1.jpg
	 0.0523151

AUTHORS

       Frank DENIS libpuzzle at pureftpd dot org

SEE ALSO

       libpuzzle(3), puzzle_set(3)

								    2012-05-09							    PUZZLE-DIFF(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

optimize the script

Discussion started by: amitrajvarma

2. UNIX for Dummies Questions & Answers

Can we optimize this simple script ?

Discussion started by: rajavu

3. UNIX for Dummies Questions & Answers

optimize shell script (snapshots)

Discussion started by: mcW

4. Shell Programming and Scripting

Simple BASH shell script to rename webcam jpg and copy into a new directory.

Discussion started by: robfindlay