Curves in Photoshop
The curves adjustment tool is an integral part of every professional’s knowledge base and image editing package.
The curve tool in photoshop are used for:
1. Adjust overall Contrast or tonal range.
2. Adjust local contrast or tonal range
3. Adjust color
Inside Phtotoshop Curve
1 Anchor points
Plot these point along the Curves line, then drag them up to lighten and down to darken.Check the first image to understand better.
2 White and black points
Drag these inwards to set new white and black points. Hold Alt while dragging for a view of any clipped pixels.
3 RGB dropdown
Select different colour channels .We can access the red, green or blue Curves lines.
Choose from a list of handy presets, or use them as a starting point for further tweaks.
5 Pencil and smooth
Toggle the Pencil tool on to draw a freehand Curve. Use the ‘Smooth Curves values’ option to smooth the line.
6 Adjust brightness
Toggle the Hand icon on, then drag up or down over tones in the image to control brightness.
A graphical representation of all the tones laid out in a ‘tonal range’, with shadows on the left and highlights on the right.
Toggle the eyedroppers on, then click over a tone in the image to set it as white, black or midtone grey.
9 Input and Output
Input represents the original tones in the image (the X-axis), while Output represents the new brightness value on a scale of 0-255 (the Y-axis).