17
Luminance Adjustment (WAVEFORM MONITOR)
1.
Under the same on set lighting conditions aim the camera back
to the white background or ideally a grayscale reference chart.
2.
Select WAVEFORM mode on the VS-100 using the NEXT
MODE option.
3.
Adjust the camera’s IRIS and matrix to reach the desired
maximum white level state. There may be a pre-selected level,
such as 600mv as a standard for consistency in brightness.
4.
If aiming at a precise grayscale chart, the VS-100 waveform
output may resemble an X shaped matrix. The steps in this
matrix should be evenly distributed in line with the grayscale
chart. However, if the matrix is not evenly distributed, it means
that the Gamma is not correctly set, and will lead to further
adjustment of the camera.
5.
Once the first camera is correctly calibrated select TOOLS>
TRACE MEMORY> SAVE TRACE to save the calibrated matrix
levels from the first camera.
6.
Now connect VS-100 to the second camera on the set. Adjust
the white and black balance on the next camera as described
earlier.
7.
Now adjust the grayscale matrix reading from second camera
output so that it matches the saved matrix from first camera to
align the cameras. The same procedure can be repeated for any
remaining cameras.
The grayscale matrix image above is not evenly stepped and shows
there are four over-exposed white areas