Chapter 19: Data buffers

This chapter discusses data buffers in detail. It shows you how to allocate and manage data buffers, and how to restrict an operation to a portion of a data buffer using child buffers and regions of interest. It shows you how YUV buffers are stored, how to create a user-defined buffer, and how MIL defines the pixel reference position. It shows you how to grab images with a Bayer camera and restore the color information.

• Data buffers overview
• Target system
• Specifying the dimensions of a data buffer
• Data type and depth
• Attribute
• • Memory locations
  • • Using on-board memory
    • Using mappable buffers
• Using child buffers, ROIs, or a copy to manipulate specific data areas
• • Child buffers
  • Specifying a region of interest
  • • Processing a non-rectangular area when an ROI is not supported
  • Copying specific buffer areas
• Managing data buffers
• • Copying data from one buffer to another
  • Cloning a data buffer
  • Transferring data between an array and a buffer
  • Loading a data buffer
  • Saving a data buffer
  • Performing operations on a sequence of image buffers
• Controlling how color image buffers are stored
• RGB buffers
• • RGB data formats
• Binary buffers
• YUV buffers
• • YUV16 Packed
  • YUV9 Planar
  • YUV12 Planar
  • YUV16 Planar
  • YUV24 Planar
  • Child YUV buffers
• Accessing a MIL buffer directly
• Mapping a data buffer to user-allocated memory
• Pixel conventions and subpixel accuracy
• • Dealing with subpixel accuracy
  • Angle convention in MIL
• Using images acquired with a Bayer color filter
• • Using MIL to convert the image
  • How the Bayer image gets converted
  • • Bilinear interpolation algorithm
    • Adaptive algorithm
    • Average algorithm
  • Performing color correction
  • Performing gamma correction
  • Correcting the white balance of your Bayer images
• Buffer overscan region
• Advanced memory management
• • The MIL non-paged memory management driver
  • • Large non-paged MIL buffers
    • On-Demand Mode