50 Theory of Operation X64-AN Quad User's ManualCropperThe Cropper extracts a window from the incoming image. This window is represented by a rectanglewhere the upper-left corner is given by horizontal and vertical offset from the start of valid video andthe rectangle size by width and height parameters. See below for diagram. Note that image widthsmust be a multiple of 16 bytes. For interlace scan video, image heights must be a multiple of two lines.Horizontal offsetVertical offsetWidthHeightWindow GeneratorComplete frameWindowFigure 29: Cropper window examplePartial Scan ModePartial Scan mode reduces the number of lines output by a camera in order to increase the frame rate.X64-AN Quad sees the output of a partial scan camera as an image with reduced height. One simplyneeds to adjust the frame rate (vertical sync frequency) and image height in order to acquire from apartial scan mode camera.Sapera Parameters for Cropper:CORACQ_PRM_CROP_LEFT: Horizontal offsetCORACQ_PRM_CROP_HEIGHT: Vertical height of area of interestCORACQ_PRM_CROP_TOP: Vertical offsetCORACQ_PRM_CROP_WIDTH: Horizontal width of area of interest
