vmeasur (version 0.1.4)

threshold_apply: Threshold a video with pre-determined parameters

Description

Using pre-determined values this function generates ROI from a video. If parameters are not known, use select_roi() This function is optimized to run in parallel, so should be relatively rapid. If running slowly, check the scratch disk is set correctly.

Usage

threshold_apply(
  threshold = 0.5,
  roi_name = "test",
  video_path = "image826.avi",
  radians = 0.217604550320612,
  xlength = 60,
  ylength = 242,
  xstart = 696,
  ystart = 323,
  image_list = NULL,
  fps = NULL
)

Arguments

threshold

The threshold for the red channel. Range 0-1.

roi_name

Name assigned to the region of interest

video_path

Location of the video file to process

radians

Degrees to rotate the image, in radians

xlength

Number of x pixels in the ROI

ylength

Number of y pixels in the ROI

xstart

ROI starting x co-ordinate

ystart

ROI starting y co-ordinate

image_list

If pre-computed, a list of images to use rather than a video

fps

Number of fps to process, this can be set lower for validation

Value

Saves the quantified CSV and overlaid video in the same directory as the video