.TH "IMGP" "1" "Oct 2016" "Version 2.2" "User Commands"
.SH NAME
imgp \- Resize, rotate JPEG and PNG images.
.SH SYNOPSIS
.B imgp [OPTIONS] [PATH [PATH ...]]
.SH DESCRIPTION
.B imgp
is a multiprocessing command line image resizer and rotator for JPEG and PNG images.
.PP
.B Features
.PP
  * resize by percentage or resolution
  * rotate clockwise by specified angle
  * adaptive resize considering orientation
  * brute force to a resolution
  * optimize images to save more space
  * convert PNG to JPEG
  * erase exif metadata
  * force smaller to larger resize
  * process directories recursively
  * overwrite source image option
.PP
Multiple files and directories can be specified as source. If \fBPATH\fR is omitted, the current directory is processed.
.PP
Output image names are appended with \fB_IMGP\fR if overwrite option is not used. By default \fB_IMGP\fR files are not processed. Doing so may lead to potential race conditions when overwrite option is used.
.PP
.B Adaptive mode
.PP
- If the specified and image orientations are same [(H >= V and h > v) or (H < V and h < v)], the image is resized with the longer specified side as reference.
.br
- In case of cross orientation [(H >= V and h <= v) or (H < V and h >= v)], the image is resized with the shorter specified side as reference. Same as non-adaptive.
.PP
For example, if an image has a resolution of 2048x1365 and is being resized to 1366x768:
.PP
- In regular mode (default), output image resolution will be 1152x768
.br
- In adaptive mode, output image resolution will be 1366x910
.SH OPTIONS
.TP
.BI "-h, --help"
Show help text and exit.
.TP
.BI "-x, --res=" res
Output resolution in HRESxVRES or percentage.
.TP
.BI "-o, --rotate=" deg
Rotate clockwise by a specified angle (in degrees). Negative inputs rotate anti-clockwise. Rotation by 0 degree is not allowed.
.TP
.BI "-a, --adapt"
Adapt to specified resolution considering the orientation of the image. Disabled by default.
.TP
.BI "-c, --convert"
Convert PNG images to JPEG to save on space. The output image is saved with '.jpg' extension.
.TP
.BI "-d, --dot"
Include hidden files (Linux-specific). By default hidden files are skipped on Linux.
.TP
.BI "-e, --eraseexif"
Erase EXIF metadata of JPEG images. Preserved by default.
.TP
.B "-f, --force"
Force to the exact specified resolution. Disabled by default.
.TP
.B "-i, --includeimgp"
Process \fI_IMGP\fR files. Risky due to potential race conditions.
.TP
.B "-k, --keep"
Do not process if image hres or vres matches specified hres or vres, or --res is 100. However, PNG images are converted to JPEG if --convert option is specified.
.TP
.B "-n, --enlarge"
Enlarge smaller images. By default smaller images are not scaled if specified resolution is greater.
.TP
.BI "-p, --optimize"
Optimize output images using PIL library optimization algorithm. Disabled by default.
.TP
.BI "-q, --quiet"
Do not show any operational output.
.TP
.B "-r, --recursive"
Recursively process sub-directories. By default only the specified directory is processed. Symbolic links to directories are ignored to avoid recursive loops.
.TP
.BI "-w, --overwrite"
Overwrite the source images. By default an output image is saved with \fB_IMGP\fR appended to the source image name.
.br
.B NOTE:
If overwrite and convert options are used together, source PNG images are deleted.
.TP
.BI "-z, --debug"
Enable debugging.
.SH EXAMPLES
.PP
.IP 1. 4
Convert some images and directories:
.PP
.EX
.IP
.B $ imgp -x 1366x768 ~/ ~/Pictures/image3.png ~/Downloads/
/home/testuser/image1.png
3840x2160 -> 1365x768
11104999 bytes -> 1486426 bytes

/home/testuser/image2.jpg
2048x1365 -> 1152x768
224642 bytes -> 31421 bytes

/home/testuser/Pictures/image3.png
1920x1080 -> 1365x768
2811155 bytes -> 1657474 bytes

/home/testuser/Downloads/image4
2048x1365 -> 1152x768
224642 bytes -> 31421 bytes
.EE
.PP
.IP 2. 4
Scale an image by 75% and overwrite the source image:
.PP
.EX
.IP
.B $ imgp -x 75 -w ~/image.jpg
/home/testuser/image.jpg
1366x767 -> 1025x575
120968 bytes -> 45040 bytes
.EE
.PP
.IP 3. 4
Rotate an image clockwise by 90 degrees:
.PP
.EX
.IP
.B $ imgp -o 90 ~/image.jpg
120968 bytes -> 72038 bytes
.EE
.PP
.IP 4. 4
Adapt the images in the current directory to 1366x1000 resolution.
.br
Visit all directories recursively, overwrite source images, ignore images with matching hres or vres but convert PNG images to JPEG.
.PP
.EX
.IP
.B $ imgp -x 1366x1000 -wrack
.EE
.PP
.EX
.IP 5. 4
Set hres=800 and adapt vres maintaining the ratio.
.PP
.EX
.IP
.B $ imgp -x 800x0
Source omitted. Processing current directory...

\[char46]/image1.jpg
1366x911 -> 800x534
69022 bytes -> 35123 bytes

\[char46]/image2.jpg
1050x1400 -> 800x1067
458092 bytes -> 78089 bytes
.SH AUTHORS
Arun Prakash Jana <engineerarun@gmail.com>
.SH HOME
.I https://github.com/jarun/imgp
.SH REPORTING BUGS
.I https://github.com/jarun/imgp/issues
.SH LICENSE
Copyright \(co 2016 Arun Prakash Jana <engineerarun@gmail.com>
.PP
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.