Levels

Levels is a tool in Photoshop which can move and stretch the brightness levels of an image histogram. It has the power to adjust brightness, contrast, and tonal range by specifying the location of complete black, complete white, and mid tones in a histogram.

• Select an image or make a selection
• Image >Adjustment levels (Ctrl + L)
• Shadow: – It changes the black range
• Mid-tones: – It changes the middle range Gray
• Highlight: – It changes the white range
• Select the required channel eg R.G.B Click and drag the Slider of shadow, Midtons and highlight.

Auto Levels, Contrast, Color: –

• Image >Adjustment
• Auto Levels, (Shift + Ctrl + L)
• Auto contrast (Alt + Shift + L)
• Auto Colour (Shift + Ctrl + B)
• These commands automatically adjust the levels, Contrast and colour.

Curves

Curves adjustment is a tool in Photoshop which can adjust points throughout an image’s tonal range. Initially, the image’s tonality is represented as a straight diagonal line on a graph. When adjusting an RGB image, the upper-right area of the graph represents the highlights and the lower-left area represents the shadows. The horizontal axis of the graph represents the input levels (original image values) and the vertical axis represents the output levels (new adjusted values). As you add control points to the line and move them, the shape of the curve changes, reflecting your image adjustments. The steeper sections of the curve represent areas of higher contrast while flatter sections represent areas of lower contrast.

• Select an image or make a selection
• Image>adjustment >Curve (Ctrl + m)
• Select the required Channel (eg RGB, Red, Green, Blue)
• Click and drag the curves
• Click on ok.

Colour Balance

This command lets you to adjust the color balance of an image, when this option is selected, Photoshop modifies the colors of the image, but the brightness and contrast of the tones stay the same.

• Select an image or make a selection
• Image >Adjustment >Color balance
• Click and drag the slider of required color e.g. RGB, CMYK
• Select the tone balance (Shadow, Mid-tones, Highlight)
• Click on ok

Brightness /Contrast

The Brightness/Contrast adjustment lets you make simple adjustments to the tonal range of an image. Moving the brightness slider to the right increases tonal values and expands image highlights, to the left decreases values and expands shadows. The contrast slider expands or shrinks the overall range of tonal values in the image.

• Select an image or make a selection
• Image > adjustment >Brightness contrast
• Drag the slider of brightness and contrast to adjust it

Hue /Saturation

• The Hue/Saturation enables you to adjust the colors in your image based on their hue, saturation, and lightness.
• Hue is the color in your image.
• Saturation is the intensity, or richness, of that color.
• lightness controls the brightness value.
• ColorizeFill same color.
• You can save and load hue setting (*.AHU)

Multi-color Image:

• Open an image add horizontal and vertical guide line
• Make a rectangular marquee selection
• Image >Adjustment Hue saturation (Ctrl + U)
• Check on Colorize
• Define Hue and Saturation

De saturation:

This command converts an image into black and white in same color mod

• Select an image or make a selection
• Image >Adjustment > De saturate ((Ctrl + Shift + U)

Replace colour:

This command lets you to replace the sample color pixel with hue saturation and light ness

• Select an image
• Image >Adjustment >Replace color
• Sample the color pixel with eyedropper tool
• Define Hue, saturation, and lightness (HSL)
• Define fuzziness to increase or decrease the color range of sample color pixel
• You can save and load the replace setting (*.AXT)

Selective colour: –

This command is used to adjust the color of an image. Use this command after converting into CMYK color mode

• Select an image
• Image >mod CMYK
• Image >adjustment >selective color
• Select the required color eg Red, Yellow, Black Define CMYK value. You can save and load the selective color setting (*.ASV)

Channel Mixer: –

This command lets you to mix the different channels e.g. CMYK RGB

• Select an image
• Image >Adjustment >channel mixer
• Select the required channel ((output channel)
• Define source channel.
• Check on monochrome (Black and white)
• You can save and lode the channel mixer setting (*.CHA)
• Press ok

Gradient Map: –

This command lets you to map the selected gradient on image.

• Select an image
• Image >Adjustment >Gradient map
• Select the required gradient for mapping ok

Invert: –

This command lets you to invert the color.

• Select an image
• Image >adjustment >invert (Ctrl + i)

Equalize: –

This Command re-distribute the brightness

• Image >adjustment >equalize.

Threshold: –

This command converts color or black and white into high color contrast black and white

• Select an image
• Image >adjustment >Threshold.
• Define threshold level.

Adjustment layer: –

Adjustment layer creates a new adjustment layer in layer palette.

To create a new adjustment layer: –

• Select an image or make a selection
• Layer >New adjustment layer > Select the required adjustment eg, levels, invert, curves etc.
• New adjustment layer display in layer palette
• To edit layer adjustment, double click on adjustment layer or select the adjustment layer.
• Layer >layer content option
• Define your own setting

To change layer adjustment: –

• Select the adjustment layer
• Layer > change layer content
• Select the required adjustment

Color and Black /white effect: –

• Open an image, duplicate the layer (Ctrl + J)
• Image > adjustment >Hue saturate, saturation -100 (Ctrl + Shift + U)
• Layer >add layer mask >revel all or
• Click on add layer mask button in layer palate
• Press D default color
• Click on brush tool
• Start painting to erase press (X)

Background Design:

• Create a new layer
• Click on Gradient Tool
• Color – Black white Black
• Blending mode – Screen
• Type – Liner Click and drag
• Filter >Artistic >Plastic wrap
• Press Ctrl + U
• Check on colorize H- 0 S- 50-60 L-0