I'm analyzing a number of videos in very similar ways. They are videos of a bubble in fluid system, on the same setup with different parameters. Thus certain values are always constant - framerate at 750 fps, pixel size at ~1.3e-2mm/px, origin of XY being in the top left corner (in order to combine methods with Fiji/ImageJ). Is there any way to set these to a default so that I don't need to manually set them for each video? Considering my dataset, this would save a considerable amount of time.
I'm also only tracking along the x-axis, so that the y-positions are never of interest. Thus when I export I either manually select time and x to copy-paste or manually remove the y-values from the table view. Another question is whether it is possible to fix the XY axis so that it stays at the same spot, even when I track along the x-axis? I.e. is it possible to track parallel to the x-axis rather than along it?
Also, Fiji uses the top left corner to denote (0,0) in an image, and then moving down increments the y coordinate positively. Is it possible to do the same in Tracker? I.e. mirror the coordinate system over the x-axis?
Hi Gabriel, unfortunately Tracker can't do most of what you are asking.
Specifically, there is no way to set a default frame rate for videos since they have built-in frame rate info that tracker reads, so that must be set individually for each. However, for pixel size/scale and origin position there is something you could do to speed things up: once you set them in one tab, you can save that tab, then in another tab choose File|Import|Tracker File and import the Coordinate System from your saved tab. This brings in both the scale and origin. You can also use Edit|Copy Object|Coordinate System in one tab, then paste into another tab.
Re keeping the origin in one spot while autotracking parallel to the x-axis rather than on the x-axis isn't currently possible, and while in principle I could add that capability, I'm afraid it would be very confusing to most users. Maybe moving the origin parallel to the y-axis when selecting one-D tracking (so the starting x-value doesn't change) would do what you need since you have no interest in the y-values?
Changing the coordinate system to left-handed rather than right-handed is also not currently possible, but maybe I could add that option in a future release. Doug
