- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
95
10.3.3. Highlight Edge Color Compensation Function
When a subject with very large contrast differences is shot, the edges of the subject may be colored. This
function temporarily changes the chroma LPF characteristics, making it possible to reduce the apparent
amount of edge coloring. Note, however, that caution is needed because the function may act to degrade
image quality in the detected area depending on the subject, given that the LPF characteristics are being
changed.
Detection may be performed in both the horizontal and vertical directions, with the LPF characteristics being
changed in the detected period. Characteristics in LPF are changed by reducing the number of taps by
approximately half. Note that the compensation phase and width of the detected signal may be adjusted.
Table 10.3-2 Parameters related to highlight edge color compensation function
Parameter
Description
HLEDLEVL CAT2_Byte24_bit0-7(LSB)
HLEDLEVM CAT2_Byte27_bit0-2(MSB)
Sets vertical and horizontal detection levels.
HLEDDL13 CAT2_Byte27_bit4
Operates the color compensation circuit based on horizontal
detection in the delay line output after (1+3HD)/2.
0[h]:OFF 1[h]:ON
HLEDDL2 CAT2_Byte27_bit5
Operates the color compensation circuit based on horizontal
detection in the delay line output after 2HD.
0[h]:OFF 1[h]:ON
HLEDV CAT2_Byte27_bit6
Operates the color compensation circuit based on vertical
detection in the delay line output after 2HD and (1+3HD)/2.
0[h]:OFF 1[h]:ON
HLESICH CAT2_Byte27_bit7
Compensation data selection
0[h]: Color erasure 1[h]: CCD data
HLEPASE CAT2_Byte29_bit0-1
Shifts the phase with respect to the detected signal.
0[h]-2[h]:0-2 pixel delay
HLEWID CAT2_Byte29_bit2-4
Can be used to set compensation widths for up to eight
pixels with respect to the detected signal.
0[h]-7[h]:1-8 pixels