1 files changed, 302 insertions, 0 deletions
diff --git a/notes/utils/image_utils.md b/notes/utils/image_utils.md
new file mode 100644
index 00000000..25dc200e
--- /dev/null
+++ b/notes/utils/image_utils.md
@@ -0,0 +1,302 @@
+Collection of utility scripts for video, image, and network
+
+-------------------------------
+
+# Video Utilities
+
+## FFMPEG
+
+resize video
+
+`ffmpeg -i input.mov -filter:v scale=720:-1 -c:a copy out.mov`
+
+resize to still frames
+
+`ffmpeg -i input.mov -s 320x180 -qscale:v 2 to/frame_%07d.jpg`
+
+export frames every n seconds
+
+`ffmpeg -i input.flv -vf fps=1 out%d.png`
+
+export frames every x/n seconds
+
+`ffmpeg -i myvideo.avi -vf fps=1/60 img%03d.jpg`
+
+shorten video
+
+`ffmpeg -ss [start] -i in.mp4 -t [duration] -c copy out.mp4`
+
+shorten video example: 5 second clip starting at 5 seconds
+
+`ffmpeg -ss 00:00:05 -i file.mp4 -t 00:00:05 -c copy file_5s.mp4`
+
+render video from still frames:
+`ffmpeg -r 1/5 -i frame_%03d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4`
+
+using glob:
+`ffmpeg -framerate 1 -pattern_type glob -i '*.png' -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4`
+
+or
+`ffmpeg -i frame_%03d.png -c:v ffv1 -qscale:v 0 test.avi`
+
+concatenate videos
+`ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy Mux1.mp4`
+
+-------------------------------
+
+# Image Utilities
+
+## Cropping, resizing, convert format
+
+Convert images to maximum width and height using imagemagick
+
+`mogrify in.jpg -resize 800x600`
+
+Resize and crop center
+
+`convert original.jpg -resize 200x200^ -gravity Center -crop 200x200+0+0 +repage cropped.png`
+
+Crop image using imagemagick with W x H x X x Y
+
+`mogrify -crop 640x480+50+100 foo.png`
+
+Convert all files with matching filename to .jpg
+
+- `find . -name "*.gif" -print0 | xargs -0 mogrify -format jpg`
+
+Resize all files with matching name to new size
+
+- `find . -name "*.jpg" -print0 | xargs -0 mogrify -resize 720`
+
+Optimize all images in subdirectories for web / s3:
+
+- `find . -name "*.jpg" -print0 | xargs -0 mogrify -sampling-factor 4:2:0 -strip -quality 85 -interlace JPEG -colorspace RGB`
+
+Verify image is not corrupt
+
+- `identify "./myfolder/*" >log.txt 2>&1`
+
+Resize all images in subdirectories such that smallest dimension is 256
+
+- `find . -name "*.JPEG" | xargs -I {} convert {} -resize "256^>" {}`
+
+Crop animated GIF
+
+- `convert input.gif -coalesce -repage 0x0 -crop WxH+X+Y +repage output.gif`
+
+
+Not sure what this is:
+
+`-format "%[pixel: u.p{0,0}]" info:`
+
+Batch folder of images into squares, for pix2pix
+
+```
+W=64
+H=64
+INDIR=mydir/orig
+OUTDIR=mydir/images
+
+for f in $INDIR/*.jpg;
+do
+  fn=$(basename "$f")
+  convert $f -resize $Wx$H^ -gravity Center -crop $W'x'$H'+0+0' +repage $OUTDIR/$fn
+done
+```
+
+## Animate GIFs
+
+With ImageMagick
+
+`convert -delay 100 -loop 0 image*.jpg animation.gif`
+
+With ImageMagick, higher quality
+
+`convert -background white -alpha remove -layers OptimizePlus -delay 1 *.png -loop 0 anim.gif`
+
+With [Gifsicle](https://www.lcdf.org/gifsicle/)
+
+`gifsicle --delay=10 --loop *.gif > anim.gif`
+
+
+-------------------------------
+
+
+# File I/O Utilities
+
+## Cleaning Directories
+
+Remove all of a specific file type
+
+`find . -name "*.gif" -print0 | xargs -0 rm`
+
+Try removing invalid images
+
+`find . -name \*.png -exec identify -ping {} \; -or -exec echo {} \;`
+`find . -name \*.png -exec identify -ping {} \; -or -exec rm -f {} \;`
+
+Rename directory of files incrementally
+
+`j=1;for i in *.png; do mv "$i" ILZMi_MGTDg_q2_"$j".png; let j=j+1;done`
+
+Count all files in subdirectories
+
+`find . -type f | wc -l`
+
+Remove all files from input file
+
+`xargs rm < 1.txt`
+
+Count all files in subdirectories
+
+`find . -maxdepth 1 -mindepth 1 -type d -exec sh -c 'echo "{} : $(find "{}" -type f | wc -l)" file\(s\)' \;`
+
+Filter images with white pixels in upper corner
+
+```
+for f in *;do convert $f -format "%[pixel: u.p{0,0}]" info:|xargs echo $f |grep white|cut -d ' ' -f 1|xargs rm -f;done
+```
+
+Copy all files in subdirectoreis
+
+`find . -name \*.jpg -exec cp {} ../test \;`
+
+Clean directories after google images python scrape
+```
+find  -name "*thumb-90x90.jpg" | xargs rm -f
+find . -name "*.jpg" | grep -v 'clean' | xargs rm -f
+find . -name "*.jpeg" | grep -v 'clean' | xargs rm -f
+```
+
+Center crop square images for training
+
+```
+convert -define jpeg:size=200x200 original.jpeg  -thumbnail 100x100^ -gravity center -extent 100x100  thumbnail.jpeg
+```
+
+Resize all directories to square crops for Caffe
+```
+find . -name "*.jpg" -print0 | xargs -0 mogrify -resize 256x256^ -gravity Center -crop 256x256+0+0 +repage
+
+```
+
+
+
+Replace spaces in filenames
+
+`find . -depth -name "* *" -execdir rename 's/ /_/g' "{}" \;`
+
+Rename all files in lowercase
+
+`find . -depth -exec rename 's/(.*)\/([^\/]*)/$1\/\L$2/' {} \;`
+
+**Delete images less than a specified size. Run without `--delete` to verify list**
+
+`missing cmd here?`
+
+-------------------------------------------
+
+## Example Script for Cleaning ImageNet Downloads
+
+```
+for f in *;do mogrify -resize 640x640! $f;done
+for f in *;do mogrify -crop 500x500+70+70 $f;done
+# filter out images with solid color backgrounds
+
+for f in *;do convert $f -format "%[pixel: u.p{0,0}]" info:|xargs echo $f |grep -E 'white|black|red|blue|green|yellow|purple|none|transparent|WhiteSmoke|gray99|gray98' | cut -d ' ' -f 1|xargs rm -f;done
+#
+for f in *;do convert $f -format "%[pixel: u.p{499,499}]" info:|xargs echo $f |grep -E 'white|black|red|blue|green|yellow|purple|none|transparent|WhiteSmoke|gray99|gray98' | cut -d ' ' -f 1|xargs rm -f;done
+#
+for f in *;do convert $f -format "%[pixel: u.p{0,499}]" info:|xargs echo $f |grep -E 'white|black|red|blue|green|yellow|purple|none|transparent|WhiteSmoke|gray99|gray98' | cut -d ' ' -f 1|xargs rm -f;done
+#
+for f in *;do convert $f -format "%[pixel: u.p{499,0}]" info:|xargs echo $f |grep -E 'white|black|red|blue|green|yellow|purple|none|transparent|WhiteSmoke|gray99|gray98' | cut -d ' ' -f 1|xargs rm -f;done
+#
+# Remove files that are b&w
+for f in *;do convert $f -colorspace HSL -channel g -separate +channel -format "%[fx:mean]" info: | xargs echo $f | grep -v "0.[0-9]*$" | cut -d ' ' -f 1 | xargs rm -f;done
+# Remove files that are close to b&w
+for f in *;do convert $f -colorspace HSL -channel g -separate +channel -format "%[fx:mean]" info: | xargs echo $f | grep "0.0[0-9]*$" | cut -d ' ' -f 1 | xargs rm -f;done
+#
+# mk bkup dir at full size (512)
+for f in *;do mogrify -resize 256x256! -median 5x5 -quality 100 $f;done
+for f in *;do mogrify -median 4x4 -quality 100 $f;done
+for f in *;do mogrify -blur 0x6 -quality 100 $f;done
+# create AB train,val,test splits
+# process A with blur Filter
+cd
+```
+
+
+---------------------------------------
+
+# Network Utilities
+
+## Setup Vhosts
+
+```
+sudo mkdir -p /var/www/api.dulldream.xyz/public_html
+sudo chown -R $USER:$USER /var/www/api.dulldream.xyz/public_html
+sudo cp /etc/apache2/sites-available/api.dulldream.conf /etc/apache2/sites-available/api.dulldream.xyz.conf
+sudo nano /etc/apache2/sites-available/dulldream.xyz.conf
+```
+
+```
+<VirtualHost *:80>
+    ServerAdmin admin@example.com
+    ServerName imagenet.com
+    ServerAlias www.imagenet.com
+    DocumentRoot /var/www/imagenet.com/public_html
+    ErrorLog ${APACHE_LOG_DIR}/error.log
+    CustomLog ${APACHE_LOG_DIR}/access.log combined
+</VirtualHost>
+```
+```
+sudo a2ensite imagenet.xyz.conf
+```
+
+## Local Server
+
+PHP
+
+`cd ~/public_html; php -S localhost:8000`
+
+Python
+
+`python -m SimpleHTTPServer 8000`
+
+
+Attempt to use modrewrite with built in server
+```
+ if (file_exists(__DIR__ . '/' . $_SERVER['REQUEST_URI'])) {
+     return false; // serve the requested resource as-is.
+   } else {
+     include_once 'index.php';
+   }
+```
+
+
+# System Utilities
+
+configure local timezone
+
+```
+export LC_ALL="en_US.UTF-8"
+export LC_CTYPE="en_US.UTF-8"
+sudo dpkg-reconfigure locales
+```
+
+
+-------------------------------------------
+
+## Image Annotation
+
+*BBTag: image annotation tool*
+
+This launches the BBTag annotation app
+
+`/root/BBTag/BBTag.sh`
+
+Process folders labeled with BBTag
+
+This will convert directory of images into cropped/resized images for Caffe training
+
+`Python/convert_bb_tag_xml.py -x input.xml -s source/images -o output/images`
+\ No newline at end of file