Inspection Report Terminology

These values are found by comparing the film to itself. In the future, Waypoint will also compare numbers to SMPTE standards.

conditionreportimage1

Lengthwise Shrink

Shrinkage as measured from the top line of the top sprocket to the bottom line of the bottom sprocket.

For each detected frame in an inspection…

  • Get the measurement of the top perf height (lp1h)The height of the top left perf in pixels, used to calculate the height in millimeters in Waypoint. and compare that to the full-width (fw1)Measurement of the width of the film in line with the top edge of the top left perforation.measurement
  • Create a percentage of perf/frame ratio based on the above value
  • Store result
  • Get the highest value count of the percentages and call that the median
  • Set a floor and ceiling based on ITEM 2 for non-stretch/non-shrink range
  • Count all frames that are below the floor as shrink and compare to a count of all frames

Lengthwise Stretch

Stretch as measured from the top line of the top sprocket to the bottom line of the bottom sprocket.

For each detected frame in an inspection…

  • Get the measurement of the top perf height (lp1h)The height of the top left perf in pixels, used to calculate the height in millimeters in Waypoint and compare that to the full-width (fw1)Measurement of the width of the film in line with the top edge of the top left perforation.measurement
  • Create a percentage of perf/frame ratio based on the above value
  • Store result
  • Get the highest value count of the percentages and call that the median
  • Set a floor and ceiling based on ITEM 2 for non-stretch/non-shrink range
  • Count all frames that are above the ceiling as stretch and compare to a count of all frames

Lateral Shrink

Shrinkage as measured from the outer line of the left sprocket to the outer line of the right sprocket.

For each detected frame in an inspection…

  • Get the measurement of the top perf width (lp1w)The width of the top left perf in pixels, used to calculate the width (in millimeters) in Waypoint. and compare that to the full-width (fw1)Measurement of the width of the film in line with the top edge of the top left perforation.measurement
  • Create a percentage of perf/frame ratio based on the above value
  • Store result
  • Get the highest value count of the percentages and call that the median
  • Set a floor and ceiling based on ITEM 2 for non-stretch/non-shrink range
  • Count all frames that are below the floor as shrink and compare to a count of all frames

Lateral Stretch

Stretch as measured from the outer line of the left sprocket to the outer line of the right sprocket.

For each detected frame in an inspection…

  • Get the measurement of the top perf width (lp1w)The width of the top left perf in pixels, used to calculate the width (in millimeters) in Waypoint. and compare that to the full-width (fw1) Measurement of the width of the film in line with the top edge of the top left perforation.measurement
  • Create a percentage of perf/frame ratio based on the above value
  • Store result
  • Get the highest value count of the percentages and call that the median
  • Set a floor and ceiling based on ITEM 2 for non-stretch/non-shrink range
  • Count all frames that are above the ceiling as stretch and compare to a count of all frames

Vertical Perf Distortion

The distortion of the height of perforations.

  • Get the highest value count of perf height (lp1h)The height of the top left perf in pixels, used to calculate the height in millimeters in Waypoint.
  • Set a floor and ceiling based on ITEM 1 for non-distorted value range
  • Count all values outside of ITEM 2 range and compare to a count of all frames

Horizontal Perf Distortion

The distortion of the width of perforations.

  • Get the highest value count of perf height (lp1w)The width of the top left perf in pixels, used to calculate the width (in millimeters) in Waypoint.
  • Set a floor and ceiling based on ITEM 1 for non-distorted value range
  • Count all values outside of ITEM 2 range and compare to a count of all frames

CSV Terminology

id

The frame number as photographed by the FI-16 operator without reference to the keycode or other physical synchronization or start markers.

created

The date the photographs were taken.

status

A subjective determination of whether a photograph passes or fails in meeting numerical criteria set by the user in a profile based on comparing the film to itself. When a frame of the film is “bad” compared to the rest of the frames in the film, it fails.

error

A determination of whether the photograph can be inspected by Waypoint. The root cause could be operator error in film handling or exposure adjustments.

parentid

The reel ID as determined by the user/FI-16 operator. If multiple inspections of one film take place, all inspections would all fall under the same reel ID.

trackerx

Finds the top of perf x and marks it as the beginning of the investigation so that Polaris/Waypoint only uses that point up to tracker y as the basis for analysis so that the same artifact is not counted twice.

trackery

Finds the top of perf y and marks it as the end of the investigation so that Polaris/Waypoint only uses that point from tracker x to tracker y as the basis for analysis so that the same artifact is not counted twice.

lp1h

The height of the top left perf in pixels, used to calculate the height in millimeters in Waypoint.

lp2h

The height of the bottom left perf in pixels, used to calculate the height (in millimeters) in Waypoint.

lp1w

The width of the top left perf in pixels, used to calculate the width (in millimeters) in Waypoint.

lp2w

The width of the bottom left perf in pixels, used to calculate the width (in millimeters) in Waypoint.

rp1h

The height of the top right perf in pixels, used to calculate the height (in millimeters) in Waypoint.

rp2h

The height of the bottom right perf in pixels, used to calculate the height (in millimeters) in Waypoint.

rp1w

The width of the top right perf in pixels, used to calculate the width (in millimeters) in Waypoint.

rp2w

The width of the bottom left perf in pixels, used to calculate the width (in millimeters) in Waypoint.

fw1

Measurement of the width of the film in line with the top edge of the top left perforation.

fw2

Measurement of the width of the film in line with the bottom edge of the top left perforation.

fw3

Measurement of the width of the film in line with the top edge of the bottom left perforation.

fw4

Measurement of the width of the film in line with the bottom edge of the bottom left perforation.

edge 1

The change in the left edge of the film in pixels per photograph. The edge of the plastic is indicated by a green line in the picture above. The blue boxes surrounding the edge line are tracking how much the edge line varies from nominally straight.

edge 2

The change in the right edge of the film in pixels per photograph. The edge of the plastic is indicated by a green line in the picture above. The blue boxes surrounding the edge line are tracking how much the edge line varies from nominally straight.