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depth-maps

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🗂️ Creative Pursuits · View mindmap

Depth Maps

Depth maps are grayscale images that store spatial depth information for a photograph or 3D scene, where pixel brightness values represent distance from the camera. In Photoshop, depth maps serve as precise masks that enable selective adjustments based on spatial position rather than color or contrast alone. This technique allows photographers and designers to apply effects like blur, sharpening, color correction, or lighting changes to specific depth planes within an image.

Creating and Using Depth Maps

Depth maps can be generated through several methods: extracted from cameras with built-in depth sensors, created from stereo image pairs, or produced through computational photography algorithms. Once imported into Photoshop, these maps function as selection or adjustment masks, enabling adjustments that respect the three-dimensional structure of the scene. Common applications include selectively blurring backgrounds while keeping foregrounds sharp, adjusting focus planes retroactively, or creating atmospheric depth effects.

Practical Applications

The technique proves particularly valuable in portrait photography, where depth maps allow precise control over background separation and bokeh effects. It also enables non-destructive adjustments to architectural and landscape photography by targeting adjustments to specific spatial layers. By working with depth information rather than traditional layer masks, photographers can achieve more natural and physically accurate results when simulating depth-of-field changes or applying location-specific corrections.

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