ACC-CX3RDK-5680
Application User Manual
17-June-2014
www.e-consystems.com
|
Subject to change without notice
Page 14 of 18
When using the Bilinear Interpolation method if the frame rate drops below 60 fps in 1280x720 or
below 45 fps in 1280 x 960, then the system performance may not be sufficient to do the
reconstruction process by this method. The user can verify this by checking the Enable Debug
Print checkbox, and see the conversion time through debug messages by using DebugView
application.
Note:
To get 1280x720 @ 60FPS it is recommended to use Nearest Neighbor method of Bayer
interpolation.
6.2.4.3 Gamma Correction
The term gamma refers to the relationship between digital pixel values to the actual luminance of
the scene. This operation is very simple; it has a look-up table that is generated based on the
gamma (
γ
) value. Every value of the pixel in the image will be used as index of look-up table and
the corresponding content of index value will be replaced to the corresponding pixel.
Table 1 Gamma Value mapping
Γ
= 1.0
Default gamma
Γ
> 1.0
Low gamma image
Γ
< 1.0
High gamma image.
Above graph and Table 1 shows the relation between input pixel value and the gamma corrected
output pixel value. Based on the scenario and requirement, gamma should be kept high or low.
6.2.4.4 Contrast
Contrast is the quality of image that shows the difference between black and white colors of the
image. Contrast adjustment is the process of altering the ratio of brightest color (White) to darkest
color (Black). Through the slider provided in the property page, user can control the contrast
being applied to image.
The Contrast by default is disabled in the application; the user can enable this by checking the
Contrast checkbox and then selecting the required value using the respective slider.
