Chapter 24. The Importance of Being Linear

Larry Gritz NVIDIA Corporation

Eugene d’Eon NVIDIA Corporation

Introduction

The performance and programmability of modern GPUs allow highly realistic lighting and shading to be achieved in real time. However, a subtle nonlinear property of almost every device that captures or displays digital images necessitates careful processing of textures and frame buffers to ensure that all this lighting and shading is computed and displayed correctly. Proper gamma correction is probably the easiest, most inexpensive, and most widely applicable technique for improving image quality in real-time applications.

Light, Displays, and Color Spaces

Problems with Digital Image Capture, Creation, and Display

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