Images: Difference between revisions
| (One intermediate revision by the same user not shown) | |||
| Line 188: | Line 188: | ||
= Remove unwanted objects = | = Remove unwanted objects = | ||
[https://github.com/Sanster/lama-cleaner Lama Cleaner] - A free and open-source inpainting tool powered by SOTA AI model | * [https://github.com/Sanster/lama-cleaner Lama Cleaner] - A free and open-source inpainting tool powered by SOTA AI model | ||
* [https://youtu.be/Anvr8tR3shM 切勿错过！终于在GitHub上找到10个超强悍的开源软件和免费项目！] | 零度解说. Lama Cleaner, Misskey, StockAI, NBlog, AutoCut, Pake, Fyrox, Tooll 3, SMSBoom, Flarum. | |||
= Remove GPS metadata from jpg files - [http://www.sno.phy.queensu.ca/~phil/exiftool/ exiftool] = | = Remove GPS metadata from jpg files - [http://www.sno.phy.queensu.ca/~phil/exiftool/ exiftool] = | ||
| Line 237: | Line 238: | ||
* [https://expertphotography.com/color-saturation/ What is Color Saturation? (How to Understand and Use It)]. You can define saturation as the depth or intensity of color present in an image. | * [https://expertphotography.com/color-saturation/ What is Color Saturation? (How to Understand and Use It)]. You can define saturation as the depth or intensity of color present in an image. | ||
* [https://www.makeuseof.com/how-to-use-hue-saturation-adjustments-photoshop/ How to Creatively Use Hue/Saturation Adjustments in Photoshop] | * [https://www.makeuseof.com/how-to-use-hue-saturation-adjustments-photoshop/ How to Creatively Use Hue/Saturation Adjustments in Photoshop] | ||
* [https://drawpaintacademy.com/color-saturation/ Color Saturation – The Ultimate Guide for Artists] with examples. | |||
* [http://www.simplearttips.com/simplearttips/20?rq=color%20theory Understand The Basics Of Color Theory] | |||
* [https://medium.com/the-coffeelicious/a-photographers-guide-to-vibrance-and-saturation-and-their-differences-4fde529cc19 A Photographer’s Guide to Vibrance and Saturation (and their differences)]. Avoiding over-saturation, and Vibrance tool | |||
= What’s the Difference between Illustrator and Photoshop = | = What’s the Difference between Illustrator and Photoshop = | ||
Revision as of 11:37, 4 June 2023
File formats
Explaining Image File Formats (video)
Note we can compress files before we share them/upload to web servers.
Free images
StockAI
https://www.stockai.com/ Free AI-generated stock photos
Anti-alias
- What Is Anti-Aliasing, and How Does It Affect My Photos and Images?
- Anti-aliasing in R graphics under Windows (as per Mac)
Convert a color image to black and white/grayscale
- https://linux.cn/article-8851-1.html
- https://www.imagemagick.org/script/command-line-options.php#canny
$ convert filename.jpg -canny 0x1 -negate canny.jpg convert.im6: unrecognized option `-canny' @ error/convert.c/ConvertImageCommand/1107. $ convert filename.jpg +clone +level-colors gray,white -background black -alpha remove -colorspace Gray canny.jpg $ convert filename.jpg -monochrome canny.jpg $ convert filename.jpg -colorspace Gray canny.jpg # Best
The current imagemagick version is 7.0.7-15.
GUI
Convert and Manipulate Images With ‘Converter’ GUI Tool in Linux
Install/build the latest imagemagick
- https://www.imagemagick.org/script/install-source.php
- https://gist.github.com/makenova/78bb63aaa1050e2ad8019ee1e7e7b433
- https://www.tutorialspoint.com/articles/how-to-install-imagemagick-on-ubuntu
# remove version installed with apt-get
sudo apt-get remove imagemagick && sudo apt-get autoremove
# install dependencies
sudo apt-get install build-essential
sudo apt-get build-dep imagemagick -y
# download ImageMagick source
wget http://www.imagemagick.org/download/ImageMagick.tar.gz
tar xzvf ImageMagick.tar.gz
# build source
cd ImageMagick-*
./configure
make
# install and verify
sudo make install
sudo ldconfig /usr/local/lib
sudo checkinstall
**********************************************************************
Done. The new package has been installed and saved to
/home/XXX/Downloads/ImageMagick-7.0.7-15/imagemagick-7.0.7_15-1_amd64.deb
You can remove it from your system anytime using:
dpkg -r imagemagick-7.0.7
**********************************************************************
$ convert --version
# bash: /usr/bin/convert: No such file or directory
$ which convert
/usr/local/bin/convert
$ whereis convert
convert: /usr/local/bin/convert
$ /usr/local/bin/convert -version
Version: ImageMagick 7.0.7-15 Q16 x86_64 2017-12-20 http://www.imagemagick.org
Copyright: © 1999-2018 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP
Delegates (built-in): bzlib fontconfig freetype jbig jng jpeg lzma pangocairo png tiff x xml zlib
Convert an image to sketch (online tool)
convert my-image.jpg -colorspace Gray my-image-gray.jpg # OR convert <img_in> -set colorspace Gray -separate -average <img_out>
To convert into a 2-bit image
convert my-image.jpg -colorspace Gray -depth 2 my-image-gray.jpg
Convert an image to a different resolution/pixel size
A few basic (but powerful) ImageMagick commands
convert image.jpg -resize 1024x768\! output_file.jpg
Convert an image file to a different format (eg icon)
- https://convertio.co/svg-png/
- Using the imagemagic program.
convert winamp-ncrow.png -resize 32x32 winamp-ncrow.ico
- 4 Ways to Batch Convert Your PNG to JPG and Vice-Versa
Make an icon using GIMP
How to Make an Icon for Windows 10 or 11 Out of Any Image
Crop an image
- How to Crop an Image Into a Shape in Google Slides
- How to crop an image to a circle in R with {cropcircles}
Rotate an image
http://www.imagemagick.org/script/command-line-options.php#rotate
convert winamp-ncrow.png -rotate 45 winamp-ncrow2.png # 45 degrees
One problem with this simple approach is the picture size (not image file) changed (become smaller) if the degree is not one of 90,180 or 270.
Create an animated gif file
Use the script here. See the last example on here. The rotation speed looks good too! Just change the source image file in the script.
#!/bin/sh # # Create a rotating figure using Distort SRT transformations # command='convert -delay 10 koala.gif -virtual-pixel white' for i in `seq 5 5 360`; do command="$command \\( -clone 0 -distort SRT $i \\)" done command="$command -delete 0 -loop 0 animate_distort_rot.gif" eval $command chmod 644 animate_distort_rot.gif
Tool to convert a sequence of numbered PNG files to an animated GIF?. Convert command line option. The option '-loop 0' means repeats infinitely and '-delay 200' means 2 seconds delay between each frame.
convert -delay 200 -loop 0 file_1.png file_2.png file_3.png animated.gif
Convert Video to GIF
The Best Ways to Convert Video to GIF
HDR/High Dynamic Range
How to Create Fake High Dynamic Range Photos in Photoshop
R packages
- imager: an R package for image processing, CRAN
- Color-Swapping Film Palettes in R with imager, ggplot2, and kmeans
Annotate jpeg/png file
Edit gif file
gifsicle package
Background
Replace transparency in PNG images with white background
http://stackoverflow.com/questions/2322750/replace-transparency-in-png-images-with-white-background
convert image.png -background white -alpha remove white.png
Online tools to remove background
Automatic background removal using R
Image segmentation in R: Automatic background removal like in a Zoom conference
Remove unwanted objects
- Lama Cleaner - A free and open-source inpainting tool powered by SOTA AI model
- 切勿错过！终于在GitHub上找到10个超强悍的开源软件和免费项目！ | 零度解说. Lama Cleaner, Misskey, StockAI, NBlog, AutoCut, Pake, Fyrox, Tooll 3, SMSBoom, Flarum.
Remove GPS metadata from jpg files - exiftool
sudo apt-get install libimage-exiftool-perl exiftool -gps:all= -xmp:geotag= image.jpg
The image file will be updated. To check the current metadata, use
exiftool image.jpg | grep GPS
Note that the above command only remove gps information. The other information like date/time of creation, camera model are not changed.
Exitftool can also be used to edit the metadata on PDF files.
exiftool -Title="This is the Title" -Author="Happy Man" -Subject="PDF Metadata" drawing.pdf
An R package exifr also available on CRAN.
Inkscape
- https://inkscape.org/
- Using the Command Line
inkscape --export-type=png --export-filename=output.png my_file.svg inkscape --export-type=png --export-filename=- my_file.svg | convert - filename.jpg
Edit Svg image
- Inkscape
- Inkscape from Fedora magazine
- Logos By Nick (Youtube)
Stitch
MAKE MORE with Inkscape – Ink/Stitch
Animated gif
- How to generate a animated GIF or movie out of images on Linux (GIMP or PhotoFilmStrip)
- convert (.gif to .png) this image to get the original view? (ImageMagick)
Hue/saturation
- What is Color Saturation? (How to Understand and Use It). You can define saturation as the depth or intensity of color present in an image.
- How to Creatively Use Hue/Saturation Adjustments in Photoshop
- Color Saturation – The Ultimate Guide for Artists with examples.
- Understand The Basics Of Color Theory
- A Photographer’s Guide to Vibrance and Saturation (and their differences). Avoiding over-saturation, and Vibrance tool
What’s the Difference between Illustrator and Photoshop
What’s the Difference between Illustrator and Photoshop?
Adobe InDesign vs. Illustrator
Adobe InDesign vs. Illustrator: Which One Should You Use?
Display images in the terminal
Design
How to Use Canva to Design Like a Professional
Logos
The 4 Best Websites to Create a Logo for Your Business
Collage
OCR
- How To Convert Images To Text On The Linux Command Line With OCR
- Use gImageReader to Extract Text From Images and PDFs on Linux
- 6 Best Chinese OCR App to Recognize Chinese Characters (Online Incl.) Google Drive can do it too (not perfect from my testing).
iOS
How to Edit Photos on Your iPhone Using the Photos App: crop, change the aspect ratio of a photo, rotate a photo, make a mirror image of a photo, select frames from Live Photos, change a photo’s filter, Change the exposure, Adjust the brilliance, Adjust highlights, Adjust shadows, Create contrast, Brighten the photo, Enhance the colors (Adjust saturation, Adjust vibrancy)