tev is an open source high dynamic range (HDR) image comparison tool for graphics people.
tev allows viewing images through various tonemapping operators and inspecting the values of individual pixels. Often, it is important to find exact differences between pairs of images.
For this purpose, tev allows rapidly switching between opened images and visualizing various error metrics (L1, L2, and relative versions thereof). To avoid clutter, opened images and their layers can be filtered by keywords.
- Good command-line and GUI interfaces.
- Playback controls. HDR image sequences can now be played back at a chosen framerate
- Images can be filtered with regular expressions.
- Histogram of image colors.
- File formats supported:
- EXR (via OpenEXR).
- PFM (compatible with Netbpm).
- HDR, BMP, GIF, JPEG, PIC, PNG, PNM, PSD, TGA (via stb_image).
- stb_image only supports subsets of each of the aforementioned file formats.
- Low-dynamic-range (LDR) images are “promoted” to HDR through the reverse sRGB transformation.
- Console output.
- Support for HiDPI scaling.
- Cross-platform support – runs under Linux, macOS, and Windows.
Developer: Thomas Müller
License: BSD 3-Clause “New” or “Revised” License
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