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    • LightnessTransform

    Modified by 2015.05.16

    Design

    LightnessTransform

    Version
    1.0

    Modified
    2015-05-06

    Source

    LightnessTransform

    IP-GUI

    LightnessTransform IP-GUI

    Function

    Change the lightness of an image.Give the first output after 2 cycles while the input enable.

    Files

    Name Function
    LightnessTransform.v Main module
    LightnessTransform_TB.sv Testbench
    True2Comp Convert true code to complemental code. Just used for simulation

    Parameters

    Name Type Range Default Description
    work_mode unsigned 0 for Pipelines, 1 for Req-ack 0 This module's working mode.
    color_channels unsigned 1 - Inf 3 Channels for color, 1 for gray, 3 for rgb, etc.
    color_width unsigned 1 - 12 8 Color's bit wide

    Ports

    Name Port Type Range Default Description
    clk input unsigned None None Clock.
    rst_n input unsigned None None Reset, active low.
    lm_gain input signed color_width : 0 None Gain for luminance, signed.The value must be true code if gain is positive, if negative, must be complemental code.
    in_enable input unsigned None None Input data enable, in pipelines mode, it works as another rst_n, in req-ack mode, only it is high will in_data can be changes.
    in_data input unsigned color_channels * color_width - 1 : 0 None Input data, it must be synchronous with in_enable.
    out_ready output unsigned None None Output data ready, in both two mode, it will be high while the out_data can be read.
    out_data output unsigned color_channels * color_width - 1 : 0 None Output data, it will be synchronous with out_ready.

    Simulations

    Simulations for this module just support RGB and Gray-scale images !

    Waves

    Pipeline mode

    Pipeline mode

    ReqAck mode

    ReqAck mode

    Original

    Original

    Results

    Results
    HDL functional simulation for pipeline mode is on the left, for req-ack mode is on the middle, and which on the right is the soft simulation

    PSNR

    1--90 1-100 2--90 2-100 Total
    1000000.00 1000000.00 1000000.00 1000000.00 1000000.00

    Utilization

    Slice LUTs* Slice Registers
    67 57

    Timing

    The max Data Path Delay is 2.533, so:

    FMax = 394.78MHz

    Thanks

    The sources of images for simulations:
    LM7-NL