1-8 (No.YF100)
2.3.1 Megapixel Still Picture Recording
In the new technology, 5 Megapixel still picture recording is
achieved with pixel interpolation. It is a technology which makes
the resolution 1.4 times higher, and the CCD pixel numbers 4
times more with pixel shift method: aligning the Green pixel CCD
half a pixel displaced.
Fig.2-6-3
Fig. 2-6-4 shows a basic pixel pattern of 3CCD system. There
are 1.23 effective Megapixel (1.33 total Megapixel) for each CCD
for separate RGB. If a still picture image is captured, the total
pixel numbers are 3.99 Megapixel which is three times 1.33
Megapixel.
Fig.2-6-4
Basic pixel pattern of 3CCD system
When initially mentioned pixel interpolation: a distinctive
technology of 3CCD "pixel shift (half a pixel displacement)" is
adopted, 5 Megapixel still picture recording of 2560x1920 dot is
achieved although the effective pixel for each CCD is 1.23
Megapixel.
Pixel shift is also called pixel displacement, a technology mainly
used with 3CCD. In this technology, only the Green CCD which
is responsible for the luminance signal is physically displaced
slightly in half a pixel.
When the Green (G) is diagonally displaced to the lower right
direction, the RGB can exist in the proportion of 1:1/4:1 instead
of 1:1:1 at the position of 1/4 in the upper left of the Green (e.g.
G1).
Fig.2-6-5
Pixel shift in 3CCD system
When the RGB exists while the size of the Green pixel is 1/4 of
other pixels, the total recording pixels seen from the Green pixel
is 4 times more (2
×
horizontally, 2
×
vertically). Resolution is in-
creased to enable 4.92 Megapixel (1.23 Megapixel
×
2
×
2) still
picture recording.
That is why still pictures can be taken in 5Megapixel quality al-
though the CCDs have VGA class pixels.
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1.23 effective
Megapixel
1.33 total
Megapixel
Pixel interpolation
4.92 Megapixel
Pixel Shift
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Summary of Contents for GZMC500US - Everio Camcorder - 1.33 MP
Page 43: ... No YF100 1 43 ...
