Video coding devices and methods use a function-based definition of scan order to scan transform coefficients associated with a block of residual video data. The mounting bracket is elongated in a length direction and adapted for mounting in a construction joint with the length direction extending in parallel with the joint axis. The light emitting die includes one or more side walls. The increased discrimination due to two series of infrared images allows for reliable detection of diseased or cancerous tissue even in the presence of skin tone variations such as birthmarks, tattoos and freckles.