Provided by: imgp_2.7-1_all bug

NAME

       imgp - Resize, rotate JPEG and PNG images.

SYNOPSIS

       imgp [OPTIONS] [PATH [PATH ...]]

DESCRIPTION

       imgp is a multiprocessing command line image resizer and rotator for JPEG and PNG images.

       Features

         * 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
         * limit processing by minimum image size
         * convert PNG to JPEG
         * erase exif metadata
         * specify output JPEG image quality
         * force smaller to larger resize
         * process directories recursively
         * overwrite source image option

       Adaptive mode

       -  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.
       - 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.

       For example, if an image has a resolution of 2048x1365 and is being resized to 1366x768:
       - In regular mode (default), output image resolution will be 1152x768
       - In adaptive mode, output image resolution will be 1366x910

       Operational notes

       - Multiple files and directories can be specified as source. If PATH is omitted, the current directory is
       processed.
       - Output image names are appended with _IMGP if '--overwrite' option is not used. By default _IMGP  files
       are not processed. Doing so may lead to potential race conditions when '--overwrite' option is used.
       -  PNG  files  with  lower  target  hres/vres  are not converted (even if '--convert' is used). Run 'imgp
       --convert (*.png)' separately to convert those.
       - Resize and rotate are lossy  operations.  For  additional  reductions  in  size  try  '--optimize'  and
       '--eraseexif' options.
       -  Option  '--optimize'  is  slower,  the  encoder  makes an extra pass over the image in order to select
       optimal encoder settings.
       - Progressive JPEG images are saved as progressive.

OPTIONS

       -h, --help
              Show help text and exit.

       -x, --res=res
              Output resolution in HRESxVRES or percentage.

       -o, --rotate=deg
              Rotate clockwise by a  specified  angle  (in  degrees).  Negative  inputs  rotate  anti-clockwise.
              Rotation by 0 degree is not allowed.

       -a, --adapt
              Adapt to specified resolution considering the orientation of the image. Disabled by default.

       -c, --convert
              Convert PNG images to JPEG to save on space. The output image is saved with '.jpg' extension.

       -d, --dot
              Include hidden files (Linux-specific). By default hidden files are skipped on Linux.

       -e, --eraseexif
              Erase EXIF metadata of JPEG images. Preserved by default.

       -f, --force
              Force to the exact specified resolution. Disabled by default.

       -i, --includeimgp
              Process _IMGP files. Risky due to potential race conditions.

       -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 and JPEG images are made progressive
              is --progressive option is specified.

       -n, --enlarge
              Enlarge  smaller  images.  By  default  smaller  images  are not scaled if specified resolution is
              greater.

       --nn   Use nearest neighbour interpolation for PNG images instead of default antialias.

       -p, --optimize
              Optimize output images using PIL library optimization algorithm. Disabled by default.

       --pr, --progressive
              Save all output JPEG images as progressive, even if the source is not.

       -q, --quality=N
              Save the image with a specified quality factor N (scale 1-95, default 75). JPEG only.

       -m, --mute
              Do not show any operational output.

       -r, --recurse
              Recursively process sub-directories.  By  default  only  the  specified  directory  is  processed.
              Symbolic links are ignored to avoid recursive loops.

       -s, --size=byte
              Minimum  size  in  bytes  required  to  process  an image. Acts as a guard against processing low-
              resolution images. Default 1024 bytes.

       -w, --overwrite
              Overwrite the source images. By default an output image is saved with _IMGP appended to the source
              image name.
              NOTE: If overwrite and convert options are used together, source PNG images are deleted.

       -z, --debug
              Enable debugging.

EXAMPLES

       1.  Convert some images and directories:

              $ 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

       2.  Scale an image by 75% and overwrite the source image:

              $ imgp -x 75 -w ~/image.jpg
              /home/testuser/image.jpg
              1366x767 -> 1025x575
              120968 bytes -> 45040 bytes

       3.  Rotate an image clockwise by 90 degrees:

              $ imgp -o 90 ~/image.jpg
              120968 bytes -> 72038 bytes

       4.  Adapt the images in the current directory to 1366x1000 resolution.
           Visit  all directories recursively, overwrite source images, ignore images with matching hres or vres
           but convert PNG images to JPEG.

              $ imgp -x 1366x1000 -wrack

       5.  Set hres=800 and adapt vres maintaining the ratio.

              $ imgp -x 800x0
              Source omitted. Processing current directory...

              ./image1.jpg
              1366x911 -> 800x534
              69022 bytes -> 35123 bytes

              ./image2.jpg
              1050x1400 -> 800x1067
              458092 bytes -> 78089 bytes

       6.  Process images greater than 50KiB only:

              $ imgp -wrackx 1366x1000 -s 51200

       7.  Generate thumbnail of the last modified file in the current dir:

              #!/usr/bin/env sh

              thumb64 ()
              {
                  pop=$(ls -1t | head -1)
                  imgp -acx 64x64 "$pop"
              }

AUTHORS

       Arun Prakash Jana <engineerarun@gmail.com>

HOME

       https://github.com/jarun/imgp

REPORTING BUGS

       https://github.com/jarun/imgp/issues

LICENSE

       Copyright © 2016-2020 Arun Prakash Jana <engineerarun@gmail.com>

       License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it. There is NO WARRANTY,  to  the  extent
       permitted by law.