YUV420SP_U8 to BGR

Assume that AIPP inputs a YUV420SP_U8 (NV12) image and outputs a BGR image, and the input image size is 256 x 256. For the original network model, C is 3, and H and W are the same as those of the AIPP input image.

• Do not configure the cropping (crop) function.
• Configure the csc_switch and the corresponding CSC matrix parameters.

aipp_op {
    aipp_mode: static
    input_format: YUV420SP_U8
    csc_switch: true
    # If the input image is a YVU420SP_U8 (NV21) image, set rbuv_swap_switch to true.
    rbuv_swap_switch: false
    related_input_rank: 0
    src_image_size_w: 256
    src_image_size_h: 256
    crop: false
    matrix_r0c0: 298
    matrix_r0c1: 516
    matrix_r0c2: 0
    matrix_r1c0: 298
    matrix_r1c1: -100
    matrix_r1c2: -208
    matrix_r2c0: 298
    matrix_r2c1: 0
    matrix_r2c2: 409
    input_bias_0: 16
    input_bias_1: 128
    input_bias_2: 128
    # The normalization parameters are set as required. The following values are examples only.
    # The normalization parameters are applied to channels after CSC and channel swap.
    mean_chn_0: 104
    mean_chn_1: 117
    mean_chn_2: 123
    min_chn_0: 0.0
    min_chn_1: 0.0
    min_chn_2: 0.0
    var_reci_chn_0: 1.0
    var_reci_chn_1: 1.0
    var_reci_chn_2: 1.0
}