Nikon VAA35001 Coolpix S1 Repair Manual page 74

Item
Image quality
Resolution in "Macro"
(EIAJ-chart shooting)
Gradation/luminance
level
Center horizontal/vertical: 950 TV lines.
・ Check the resolution in near distance (W14cm, M (Z03) 4cm and
T14cm).
・ Take pictures in high image quality mode.
・ Take pictures in "AUTO" and the image quality priority mode
with full aperture and "without ND".
・ At all zooming positions and 0.3-m or more distance, set the
chart to 5100K-viewer. Take pictures of an object in the full field
angle.
・ Open the image data file via Photoshop and check the resolution
visually.
・ Make a check by all postures and also check difference in
resolution at zooming reciprocating motion.
[Histogram's gray average value]
・ Black: 10 ± 5
Gray: 145 ± 10
White: 225 ± 15
・ Set the scale to the 5100K-viewer, and in "AUTO" and the image
quality priority mode, take pictures of an object in the full field
angle.
・ Open the image data file via Photoshop and select an area to
be measured of each color (central area: 64 × 64 pixels) with
rectangle selector tool.
・ Read the histogram's gray value and the gray standard deviation.
・ Measured area
Luminance level:
Upper left 1 step: Black, 6 steps: Gray, Center: White
Lower left 6 steps: Gray, 11 steps: Black
- R7･ S1 -
Criteria
VAA35001-R.3666.A
Tools
EIAJ chart
Photoshop
Siemens chart
5100K viewer
ITE γ 0.45
Gray scale (standard)
Photoshop