HTJ2K Comparing qstep values for ojph for 16-bit tif input for 4k media.

Comparing different qstep values for 4k media, encoded with OIIO using the OpenJPH HTJ2K encoder.

Test Data

This allows you pick which media was encoded, and then compare the results of the encode. What you are looking at is a YCrCb diff x20 which allows you to see significant differences. See Instructions for usage.

Media Selection	Show YCrCb Difference between Source and encoded media.
Left Image	Right Image

Zoom:

80%

How to Use:

Select two images/videos from the dropdowns or upload your own files
Drag the white divider left and right to compare different parts of the media
Use the zoom slider to zoom in/out of both media simultaneously
Use mouse wheel over the comparison area to zoom in/out quickly
Click and drag within the comparison area to pan around zoomed media
For videos: use the time slider to scrub through footage and play/pause button
Media is automatically centered and scaled to fit the comparison area