Adrian F. Clark
In the HSV colour space, the complementary colour of green is:
In OpenCV, if Y indexes lines, X columns and C channels, the right nesting >of loops is
C inside X inside Y
An image which is under-exposed will have a histogram that
has a peak at low grey-level values
What is contrast stretching?
expanding the available grey levels to fill the range used for displaying images
With additive colours, yellow is a mixture of
red and green
After contrast-stretching, an over-exposed image which has only a few grey levels occupied will have a histogram that
tends to show small spikes across the entire range of grey levels
OpenCV was initially developed in
What is plotted along the abscissa (x-axis) of a histogram?
For an image of unsigned bytes, how can it be contrast-reversed?
subtract each pixel from 255
Histogram equalization involves:
using the cumulative histogram as a look-up table