Nikon coolpix7900 - Page 103

VAA46003-R.3659.A
- R5･ E7900 -
Item Criteria Applied tool(s)
Quality of image
Noise Calculate the maximum value δ Ymax, δ Rmax, δ Gmax and
δ Bmax of the measurement point (gray scale: 22 patches).
・ Minimum ISO sensitivity
δ Ymax ≦ 3.5
δ Rmax 、δ Gmax 、δ Bmax ≦ 3.5
・ISO200 δ Ymax ≦ 5.0
δ Rmax 、δ Gmax 、δ Bmax ≦ 5.0
（7M, FINE, PWB, center-weighted metering, Outline: Standard
gradation: Standard, Chroma correction: 0, Min. ISO sensitivity:
ISO200）
（Correct exposure to obtain "220 (8 bits)" in the case of "White
100%".）
(Equip the 5100K viewer with a scale and shoot an object in the
full range of angle of view.)
（Perform defocusing not to generate reticulate moires.）
（Calculate the standard deviation δ Y, δ R, δ G and δ B of
Y, R, G and B for the central area 64 pixels × 64 pixels of each
density.）
Gray scale chart
PHOTOSHOP
Reproduction of color
B R G B
W 209 ± 20 209 ± 20 209 ± 20
Ye 208 ± 20 208 ± 20 30 ± 15
R 180 ± 20 010 ± 10 10 ± 10
(Photography mode: AUTO)
(Equip the 5100K viewer with the chart and shoot an object in the
full range of angle of view.)
(Open the recorded image data file through PHOTOSHOP and
pick up a measurement section with each color (its central area 64
× 64 pixels) with the rectangle selector tool.)
(Read the histogram's RGB.)
Color bar chart
PHOTOSHOP