pixel_operator.v

`timescale 10ns / 1ps
// clock speed is 10e11 freq , i.e. 10e-11 freq , so we have used time factor 10e-12
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: Ayush Agarwal 
// 
// Create Date: 17.03.2022 14:17:06
// Design Name: 
// Module Name: file_1
// Project Name: 
// Target Devices: 
// Tool Versions: 
// Description: 
// 
// Dependencies: 
// 
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
// 
//////////////////////////////////////////////////////////////////////////////////

// declaring the module
module pixel_operator(outbyte,inbyte,threshold,value,select,clk);
// declaring the inputs and the outputs 
output reg [0:7] outbyte;
input wire [0:7] inbyte;
input wire [0:7] threshold;
input wire [0:7] value;
input wire [0:1] select;
input wire clk ;

// on the posedge , doing the required process 
/*
00 for increasing brightness 
01 for decreasing brightness 
10 for thresholding 
11 for inverting the value 
*/
always @(posedge clk)
begin 
case(select)
    2'b00: outbyte = (inbyte>(8'b11111111 - value )) ? (8'b11111111):(inbyte+value) ;
    2'b01: outbyte = (inbyte < value) ? (8'b00000000) : (inbyte-value) ;
    2'b10: outbyte = (inbyte > threshold) ? (8'b11111111) : (8'b00000000) ;
    2'b11: outbyte = 8'b11111111 - inbyte ;
endcase
end

endmodule