Nikon coolpix7900, Руководство по ремонту

Страница: 102 / 111

VAA46003-R.3659.A
- R4･ E7900 -
Item Criteria Applied tool(s)
Quality of image
Resolution in AF The resolution must be in compliance with the following values in
all the postures of the EIA J chart evaluation.
< 7 M-FINE >
・
Horizontal center: 1300 TV lines
Vertical center: 1300 TV lines
Horizontal line(s) at each corner: 800 TV lines
Vertical line(s) at each corner: 800 TV lines
(Take a picture with AUTO, 7 M, FINE and PWB to be in the
aperture "open" condition.)
(Take a picture with a full angle of view under the condition of
WIDE-end, MIDDLE (Z 06 ), TELE-end and the distance of 0 . 3 m
or more.)
(Then, open the recorded image data file through PHOTOSHOP
and check the resolution visually.)
EIAJ chart
PHOTOSHOP
Gradation/luminance
level
Quality of image
[Histogram's gray average value]
Black: 14 ± 7
Gray: 134 ± 15
White: 225 ± 10
(Equip the 5100 K viewer with a chart and shoot an object in the
full range of angle of view in the "AUTO", " 7 M" and "FINE"
modes.)
(Open the recorded image data file through PHOTOSHOP and
pick up a measurement section with the each color (its central
area 64 × 64 pixels) with the rectangle selector tool.)
(Read the histogram's gray value and the gray standard deviation.)
・ Measurement section
Luminance level:
Upper left 1 step: Black, 6 steps: Gray,
Center: White Lower left 6 steps: Gray, 11 steps: Black
5100 K viewer
Gray scale chart
PHOTOSHOP