iview

A quick and simple image viewer for Linux, based on Python and Qt

Requirements

Running iview requires Qt and PyQt installed. iview program is a single python file.

Usage

Calling iview requires specifying one or more image file names. When a single file is specified the list of all files with a known extension in the same directory is used as image list for prev/next.

Key bindings

• "F1" : Help on key bindings
• Left arrow : previous file
• Right arrow : next file
• "1", "2", "3", "4" : Sets exact 1/1, 2/1, 3/1 or 4/1 pixel scaling
• "0", Home : Zoom image to fit view
• "F" : Fullscreen on/off
• "R" : Rotate image
• "E" : Ellipse markup mode ("1"-"9" thickness, "R"/"G"/"B" color)
• "A" : Arrow markup mode ("1"-"9" thickness, "R"/"G"/"B" color)
• "T" : Text markup mode (ctrl-"1".."9" font size, ctrl-"R"/"G"/"B" color)
• "Y" : Grayscale conversion (simply keeps green channel only)
• "P" : Pixel inspection mode
• "M" : Measuring mode
• "C" : Crop image
• "S" : Save image as
• "U" : Undo unsaved changes (rotation/crop/markup)
• "F2" : Rename current file
• "Del" : Delete current file

Mouse drag does panning, mouse wheel does zooming.

Features

• Smooth scaling when zooming out, hard scaling when zooming in

• When changing to next/prev picture the view is not changed if picture size is the same (allows looking at several images as an animation)

• Updating the image on disk updates the view (live display)

• Zoom is centered on mouse position

• Transparency support, measuring mode

• Rotation, cropping, simple markup and format conversion with "save as..."

• Supports most image formats (anything QImage accepts). On my system the list of known extensions is: bmp, bw, bw, dds, eps, eps, epsf, epsf, epsi, epsi, exr, exr, gif, ico, jp2, jpeg, jpg, mng, pbm, pcx, pcx, pgm, pic, png, ppm, psd, psd, ras, ras, rgb, rgb, rgba, rgba, sgi, sgi, svg, svgz, tga, tga, tif, tiff, xbm, xcf, xcf, xpm, xv.

• PGM file writing (strangely unsupported by QImage)

• Running with --screenshot [filename] takes a full desktop screenshot and opens it

• Allows visualization of a vector overlay on the image allowing

  • filled polygons
  • stroked polygons
  • circles
  • "x" crosses
  • "+" crosses
  • text

  Vector data is loaded if a file with the same name as the image with the addition of ".vo" is present. See code for format.