Adobe Photoshop Formulas

Adobe Photoshop is a powerful image editing software that offers various formulas and mathematical operations to perform complex tasks. Here are some examples:

Color and Channel Formulas

1. *RGB to CMYK*: `C = 255 - R`, `M = 255 - G`, `Y = 255 - B`, `K = min(C, M, Y)`

2. *Hue, Saturation, Value (HSV)*: `H = atan2(sqrt(3)*(G-B), 2*R-G-B)`, `S = max(R, G, B) - min(R, G, B)`, `V = max(R, G, B)`

3. *Grayscale*: `Gray = 0.2126*R + 0.7152*G + 0.0722*B`

Layer Blending Formulas

1. *Multiply*: `Result = Layer1 * Layer2`

2. *Screen*: `Result = 1 - (1 - Layer1) * (1 - Layer2)`

3. *Overlay*: `Result = Layer1 * Layer2 + (1 - Layer1) * (1 - Layer2)`

4. *Soft Light*: `Result = Layer1 * (Layer2 + (1 - Layer2) * Layer1)`

5. *Hard Light*: `Result = Layer1 * (Layer2 + (1 - Layer2) * (1 - Layer1))`

Masking and Selection Formulas

1. *Masking*: `Result = Layer * Mask`

2. *Selection*: `Result = Image * (Selection / 255)`

Other Formulas

1. *Unsharp Mask*: `Result = Image + (Image - Blur) * Amount`

2. *Gaussian Blur*: `Result = Image * exp(-((x- Center)^2 + (y-Center)^2) / (2 * Radius^2)))`

These formulas are used in various Photoshop operations, such as layer blending, color correction, and image processing. Keep in mind that some formulas might be simplified or modified for specific use cases.