Nikon NX-D Levels & Curves, wertyui, Introduction, Viewing Pictures, Filters, Image Adjustment

Introduction

Viewing Pictures

Filters

Image Adjustment

Other Features

Menu Guide

Tool Buttons

Levels & Curves

Adjust contrast, tone (brightness), and color balance. Adjustments can be made over the

entire image or to specific portions of the tone range (for example, the gamut of a specific printer, monitor, or other output device), allowing enhancements to be made without sacrificing detail.

qChannel: The current color channel.

wAuto Contrast: Increase contrast by setting
the white and black points to exclude a	q
set proportion of the brightest and dark-
est pixels in the image, creating a curve	o	wertyui
that makes optimal use of the output tone
range while preserving details in shadows
and highlights.

eSet Black Point: Click this button and then

click the image in the preview palette to !0 set the black point for the red, green, and !1

blue channels to the value for the pixel un-	!2
der the cursor.
	!3
rSet Neutral Point: Click this button and then
click the image in the preview palette to	!4
set the midpoint for the red, green, and	!5
blue channels to the value for the pixel un-

der the cursor.

tSet White Point: Click this button and then click the image in the preview pal- ette to set the white point for the red, green, and blue channels to the value for the pixel under the cursor.

yAdd Anchor Point: Click this button and then click the image in the preview area to add a point to the curve corresponding to the value of the pixel under the cursor.

uReset Current Channel: Reset the curve for the current channel to linear.

iReset All Channel: Reset all curves to linear.

oWhite-pointoutput-level slider: Choose the maximum output level (white point). Dragging the slider down lowers the brightness of the brightest pixels.

!0Histogram: The histogram shows how the pixels in the image are distributed with respect to brightness. The horizontal axis corresponds to brightness (in the range 0–255), the vertical axis to the number of pixels.

!1Tone curve: The slope and shape of the curve determines the brightness of the image in the corresponding portion of the tone range.

!2Black-pointoutput-level slider: Choose the minimum output level (black point). Dragging the slider up increases the brightness of the darkest pixels.

!3Black-point input slider: Any pixels in the portion of the tone range to the left of the black point are output at the minimum output level. Dragging the slider to the right steepens the curve and enhances contrast but may cause loss of details in shadows.

!4Gamma: Dragging the slider to the left increases the brightness of mid-tones, while dragging it to the right makes mid-tones darker.

!5White-point input slider: Any pixels in the portion of the tone range to the right of the white point are output at the maximum output level. Dragging the slider to the left steepens the curve and enhances contrast but may cause loss of details in highlights.

ASampling the Current Channel

By default, the black point, white point, add anchor point, and auto contrast controls respectively set the black point, anchor points, white point, and contrast for all channels. To apply these controls only to the current channel, press Ctrl (or on Mac computers, the option key) while clicking the control.

Capture NX-D Reference Manual 30