Aiming to present the real world in the eyes of consumers, High Dynamic Range (HDR) has become the hottest subject of imaging technology. The biggest issue for most display engineers is how to ensure a real HDR image reproduction with the display product through the accurate process.
The Superiority of iST
Despite successfully calibrating according to the EOTF standard (The EOTF standard is aimed at the electro-optical conversion functions for converting telecommunications signals into visible light), the discontinuous contour is still obvious at high brightness.
Discontinuous contour is obvious at high brightness due to incorrect algorithm.
With iST’s tone improvement, the high bright region becomes smooth and keeps the contrast.
Poor contour on high bright region
iST’s tone improvement makes image with more steps in brightness and smother transitions, also keeps the original contrast.
HDR calibration on dark region is also a frequent challenge, which mainly results from the IC design. The chip increment value at low level should take into account; moreover, the chip should perform an ideal curve according to the theoretical value.
Incorrect algorithm results in discontinuous contour in dark region.
iST’s calibration solves the discontinuous contour.
How to solve the errors to correct the EOTF and tone measurement is the key to overall performance.
The EOTF measurement before correction
The EOTF measurement after correction