【FPGA】 Robei EDA的使用（12）—— 利用实现图像处理的伽马矫正
天下凡人皆庸于懒，天下才子皆毁于傲。
自30号初赛作品提交之后，本来要在实验室准备电赛培训，然后一边等着结果出来，奈何身体不好，学校线下之后，几乎天天与实验室为伍，到了6月份，光通宵调作品的时间，都有两手之数，身体和精神都没法正常下去，于是抛开一切杂事，外出修养了好久，终于满血复活，精神状态也好了很多。初赛的结果也有了，我们成功晋级分赛区决赛，到了给作品完善功能的时候了~于是我想到了对摄像头实时图像的补偿，就是伽马矫正了。
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伽马矫正
顾名思义，这是一个有矫正作用的图像处理算法，而关于这个伽马矫正具体是一个什么东西，可以参考这篇博客。
伽马矫正的背景
简单来说就是，由于摄像头物理的原因，导致摄像头采集显示出来的图像，会相较于自然的实际情况有一定程度的失真，明暗区域回比实际更暗，明亮的区域会比实际更亮。这个时候就需要通过一种补偿的方式，来使得图像还原的近似实际的图像。
而伽马矫正的公式为：
图
图源百度百科
在具体到像素的处理，是这样的：
我在设计系统的时候，仅仅对实时显示的图像进行了伽马矫正，并没有对人脸检测和边缘检测的图像进行矫正。（其实是我还没做到）通过对图像进行伽马矫正，能够使图像更近似实际值，在一定程度上，也可以利用伽马矫正，令过亮的图像曝光率降低，或者令过暗的图像提高曝光率，使得原来一些相对视觉效果不好的图像，能够有一个还可以的视觉效果。
Robei 工程
基于Verilog的伽马矫正有3份代码，但只有2份代码真正是属于“矫正”，其它算是例化代码。
Robei的工程文件下载在这个地方：
链接：https://pan.baidu.com/s/1Dhv2ktTXDau_RHuXbMoysw
提取码：mbav
Quartus 工程
而Verilog的代码在此处：
(例化代码)
module Contrast_Prj(
input Pclk,
input Rst,
input Vsync,
input Hsync,
input De,
input [23:0] RGB,
output Vsync_o,
output Hsync_o,
output De_o,
output [23:0]RGB_o,
input CONTRAST_SIG,
input BRIGHT_SIG,
input [7:0] CONTRAST,
input [7:0] BRIGHT
);
constrast_ipcore constrast_ipcore_m0(
.Pclk(Pclk),
.Rst(Rst),
.Vsync(Vsync),
.Hsync(Hsync),
.De(De),
.RGB(RGB),
.CONTRAST_SIG(CONTRAST_SIG),
.BRIGHT_SIG(BRIGHT_SIG),
.CONTRAST(CONTRAST),
.BRIGHT(BRIGHT),
.Vsync_o(Vsync_o),
.Hsync_o(Hsync_o),
.De_o(De_o),
.RGB_o(RGB_o)
);
endmodule（gamma 矫正）
module constrast_ipcore(
input wire Pclk,
input wire Rst,
input wire Vsync,
input wire Hsync,
input wire De,
input wire[23:0] RGB,
input wire CONTRAST_SIG,
input wire BRIGHT_SIG,
input wire[7:0] CONTRAST,
input wire[7:0] BRIGHT,
output reg Vsync_o,
output reg Hsync_o,
output reg De_o,
output reg [23:0]RGB_o
);
parameter IamgeSize = 32'h00001945;
reg[31:0] R_Sum,G_Sum,B_Sum;
reg[31:0] R_Sum_r,G_Sum_r,B_Sum_r;
wire[63:0] AverageR_temp;
wire[63:0] AverageG_temp;
wire[63:0] AverageB_temp;
reg[7:0] AverageR;
reg[7:0] AverageG;
reg[7:0] AverageB;
reg vsync_r;
wire vsync_p;
always @(posedge Pclk)
vsync_r<=Vsync;
assign vsync_p = Vsync & (~vsync_r)；
assign AverageR_temp = R_Sum_r * IamgeSize;
assign AverageG_temp = G_Sum_r * IamgeSize;
assign AverageB_temp = B_Sum_r * IamgeSize;
always @ (posedge Pclk or negedge Rst) //�Ĵ����
begin
if(!Rst)
begin
AverageR <= 8'd0;
AverageG <= 8'd0;
AverageB <= 8'd0;
end
else
begin
AverageR <= AverageR_temp[38:31]; //��ȡ����λ
AverageG <= AverageG_temp[38:31];
AverageB <= AverageB_temp[38:31];
end
end
always @(posedge Pclk)
begin
if(vsync_p || Rst)
begin
R_Sum_r<=R_Sum;
G_Sum_r<=G_Sum;
B_Sum_r<=B_Sum;
R_Sum<=0;
G_Sum<=0;
B_Sum<=0;
end
else if(De==1'b1)
begin
R_Sum<=R_Sum+RGB[23:16];
G_Sum<=G_Sum+RGB[15:8];
B_Sum<=B_Sum+RGB[7:0];
end
end
//==================================================================================
wire[7:0] Contrast_Sel;
wire[31:0] Contrast_Recip;
assign Contrast_Sel = (CONTRAST_SIG==1)? (8'd100-CONTRAST):8'd100;
Reciprocal Reciprocal_m0(
.Divisor_Sel(Contrast_Sel),
.Recip(Contrast_Recip)
);
reg[63:0] Contrast_r,Contrast_g,Contrast_b;
reg[7:0] divisor_percent;
reg tvalid_RGB;
wire dout_tvalid_R,dout_tvalid_G,dout_tvalid_B;
wire[55:0] dout_tdata_R,dout_tdata_G,dout_tdata_B;
reg[7:0] R_o,G_o,B_o;
reg de_r;
reg R_flg,G_flg,B_flg;
always @(posedge Pclk)
begin
de_r<=De;
if(De==1'b1)
begin
if(CONTRAST_SIG==1) //�Աȶ��ϵ�
begin
// divisor_percent<=100-CONTRAST;
if(RGB[23:16]>AverageR)
begin
Contrast_r<=(RGB[23:16]-AverageR)*100*Contrast_Recip;
R_flg<=1;
end
else begin
Contrast_r<=(AverageR-RGB[23:16])*100*Contrast_Recip;
R_flg<=0;
end
if(RGB[15:8]>AverageG)
begin
Contrast_g<=(RGB[15:8]-AverageG)*100*Contrast_Recip;
G_flg<=1;
end
else begin
Contrast_g<=(AverageG-RGB[15:8])*100*Contrast_Recip;
G_flg<=0;
end
if(RGB[7:0]>AverageB)
begin
Contrast_b<=(RGB[7:0]-AverageB)*100*Contrast_Recip;
B_flg<=1;
end
else begin
Contrast_b<=(AverageB-RGB[7:0])*100*Contrast_Recip;
B_flg<=0;
end
end
else if(CONTRAST_SIG==0)
begin
if(RGB[23:16]>AverageR)
begin
Contrast_r<=(RGB[23:16]-AverageR)*(100-CONTRAST)*Contrast_Recip;
R_flg<=1;
end
else begin
Contrast_r<=(AverageR-RGB[23:16])*(100-CONTRAST)*Contrast_Recip;
R_flg<=0;
end
if(RGB[15:8]>AverageG)
begin
Contrast_g<=(RGB[15:8]-AverageG)*(100-CONTRAST)*Contrast_Recip;
G_flg<=1;
end
else begin
Contrast_g<=(AverageG-RGB[15:8])*(100-CONTRAST)*Contrast_Recip;
G_flg<=0;
end
if(RGB[7:0]>AverageB)
begin
Contrast_b<=(RGB[7:0]-AverageB)*(100-CONTRAST)*Contrast_Recip;
B_flg<=1;
end
else begin
Contrast_b<=(AverageB-RGB[7:0])*(100-CONTRAST)*Contrast_Recip;
B_flg<=0;
end
end
end
if(de_r)
begin
if(R_flg)
begin
if(AverageR+Contrast_r[63:31]>255)
R_o<=8'hff;
else R_o<=AverageR+Contrast_r[63:31];
end
else begin
if(AverageR<Contrast_r[63:31])
R_o<=8'h00;
else R_o<=AverageR-Contrast_r[63:31];
end
end
if(de_r)
begin
if(G_flg)
begin
if(AverageG+Contrast_g[63:31]>255)
G_o<=8'hff;
else G_o<=AverageG+Contrast_g[63:31];
end
else begin
if(AverageG<Contrast_g[63:31])
G_o<=8'h00;
else G_o<=AverageG-Contrast_g[63:31];
end
end
if(de_r)
begin
if(B_flg)
begin
if(AverageB+Contrast_b[63:31]>255)
B_o<=8'hff;
else B_o<=AverageB+Contrast_b[63:31];
end
else begin
if(AverageB<Contrast_b[63:31])
B_o<=8'h00;
else B_o<=AverageB-Contrast_b[63:31];
end
end
end
always @(*)
begin
Vsync_o <= Vsync;
Hsync_o <= de_r;
De_o <= de_r;
if(BRIGHT_SIG)
begin
if((R_o+BRIGHT)>255)
RGB_o[23:16]<=8'hff;
else RGB_o[23:16]<=(R_o+BRIGHT);
if((G_o+BRIGHT)>255)
RGB_o[15:8]<=8'hff;
else RGB_o[15:8]<=(G_o+BRIGHT);
if((B_o+BRIGHT)>255)
RGB_o[7:0]<=8'hff;
else RGB_o[7:0]<=(B_o+BRIGHT);
end
else begin
if((R_o<BRIGHT))
RGB_o[23:16]<=8'h00;
else RGB_o[23:16]<=(R_o-BRIGHT);
if(G_o<BRIGHT)
RGB_o[15:8]<=8'h00;
else RGB_o[15:8]<=(G_o-BRIGHT);
if(B_o<BRIGHT)
RGB_o[7:0]<=8'h00;
else RGB_o[7:0]<=(B_o-BRIGHT);
end
end
endmodule（查找表）
module Reciprocal(
input wire[7:0] Divisor_Sel,
output reg[31:0] Recip
);
always @ (*)
begin
case(Divisor_Sel)
8'd0: Recip = 32'b00000000000000000000000000000000;
8'd1: Recip = 32'b10000000000000000000000000000000;
8'd2: Recip = 32'b01000000000000000000000000000000;
8'd3: Recip = 32'b00101010101010101010101010101010;
8'd4: Recip = 32'b00100000000000000000000000000000;
8'd5: Recip = 32'b00011001100110011001100110011001;
8'd6: Recip = 32'b00010101010101010101010101010101;
8'd7: Recip = 32'b00010010010010010010010010010010;
8'd8: Recip = 32'b00010000000000000000000000000000;
8'd9: Recip = 32'b00001110001110001110001110001110;
8'd10: Recip = 32'b00001100110011001100110011001100;
8'd11: Recip = 32'b00001011101000101110100010111010;
8'd12: Recip = 32'b00001010101010101010101010101010;
8'd13: Recip = 32'b00001001110110001001110110001001;
8'd14: Recip = 32'b00001001001001001001001001001001;
8'd15: Recip = 32'b00001000100010001000100010001000;
8'd16: Recip = 32'b00001000000000000000000000000000;
8'd17: Recip = 32'b00000111100001111000011110000111;
8'd18: Recip = 32'b00000111000111000111000111000111;
8'd19: Recip = 32'b00000110101111001010000110101111;
8'd20: Recip = 32'b00000110011001100110011001100110;
8'd21: Recip = 32'b00000110000110000110000110000110;
8'd22: Recip = 32'b00000101110100010111010001011101;
8'd23: Recip = 32'b00000101100100001011001000010110;
8'd24: Recip = 32'b00000101010101010101010101010101;
8'd25: Recip = 32'b00000101000111101011100001010001;
8'd26: Recip = 32'b00000100111011000100111011000100;
8'd27: Recip = 32'b00000100101111011010000100101111;
8'd28: Recip = 32'b00000100100100100100100100100100;
8'd29: Recip = 32'b00000100011010011110111001011000;
8'd30: Recip = 32'b00000100010001000100010001000100;
8'd31: Recip = 32'b00000100001000010000100001000010;
8'd32: Recip = 32'b00000100000000000000000000000000;
8'd33: Recip = 32'b00000011111000001111100000111110;
8'd34: Recip = 32'b00000011110000111100001111000011;
8'd35: Recip = 32'b00000011101010000011101010000011;
8'd36: Recip = 32'b00000011100011100011100011100011;
8'd37: Recip = 32'b00000011011101011001111100100010;
8'd38: Recip = 32'b00000011010111100101000011010111;
8'd39: Recip = 32'b00000011010010000011010010000011;
8'd40: Recip = 32'b00000011001100110011001100110011;
8'd41: Recip = 32'b00000011000111110011100000110001;
8'd42: Recip = 32'b00000011000011000011000011000011;
8'd43: Recip = 32'b00000010111110100000101111101000;
8'd44: Recip = 32'b00000010111010001011101000101110;
8'd45: Recip = 32'b00000010110110000010110110000010;
8'd46: Recip = 32'b00000010110010000101100100001011;
8'd47: Recip = 32'b00000010101110010011000100000101;
8'd48: Recip = 32'b00000010101010101010101010101010;
8'd49: Recip = 32'b00000010100111001011110000010100;
8'd50: Recip = 32'b00000010100011110101110000101000;
8'd51: Recip = 32'b00000010100000101000001010000010;
8'd52: Recip = 32'b00000010011101100010011101100010;
8'd53: Recip = 32'b00000010011010100100001110011111;
8'd54: Recip = 32'b00000010010111101101000010010111;
8'd55: Recip = 32'b00000010010100111100100000100101;
8'd56: Recip = 32'b00000010010010010010010010010010;
8'd57: Recip = 32'b00000010001111101110000010001111;
8'd58: Recip = 32'b00000010001101001111011100101100;
8'd59: Recip = 32'b00000010001010110110001111001011;
8'd60: Recip = 32'b00000010001000100010001000100010;
8'd61: Recip = 32'b00000010000110010010111000101001;
8'd62: Recip = 32'b00000010000100001000010000100001;
8'd63: Recip = 32'b00000010000010000010000010000010;
8'd64: Recip = 32'b00000010000000000000000000000000;
8'd65: Recip = 32'b00000001111110000001111110000001;
8'd66: Recip = 32'b00000001111100000111110000011111;
8'd67: Recip = 32'b00000001111010010001001100011010;
8'd68: Recip = 32'b00000001111000011110000111100001;
8'd69: Recip = 32'b00000001110110101110011000000111;
8'd70: Recip = 32'b00000001110101000001110101000001;
8'd71: Recip = 32'b00000001110011011000010101101000;
8'd72: Recip = 32'b00000001110001110001110001110001;
8'd73: Recip = 32'b00000001110000001110000001110000;
8'd74: Recip = 32'b00000001101110101100111110010001;
8'd75: Recip = 32'b00000001101101001110100000011011;
8'd76: Recip = 32'b00000001101011110010100001101011;
8'd77: Recip = 32'b00000001101010011000111011110110;
8'd78: Recip = 32'b00000001101001000001101001000001;
8'd79: Recip = 32'b00000001100111101100100011101001;
8'd80: Recip = 32'b00000001100110011001100110011001;
8'd81: Recip = 32'b00000001100101001000101100001111;
8'd82: Recip = 32'b00000001100011111001110000011000;
8'd83: Recip = 32'b00000001100010101100101110010000;
8'd84: Recip = 32'b00000001100001100001100001100001;
8'd85: Recip = 32'b00000001100000011000000110000001;
8'd86: Recip = 32'b00000001011111010000010111110100;
8'd87: Recip = 32'b00000001011110001010010011001000;
8'd88: Recip = 32'b00000001011101000101110100010111;
8'd89: Recip = 32'b00000001011100000010111000000101;
8'd90: Recip = 32'b00000001011011000001011011000001;
8'd91: Recip = 32'b00000001011010000001011010000001;
8'd92: Recip = 32'b00000001011001000010110010000101;
8'd93: Recip = 32'b00000001011000000101100000010110;
8'd94: Recip = 32'b00000001010111001001100010000010;
8'd95: Recip = 32'b00000001010110001110110100100011;
8'd96: Recip = 32'b00000001010101010101010101010101;
8'd97: Recip = 32'b00000001010100011101000001111110;
8'd98: Recip = 32'b00000001010011100101111000001010;
8'd99: Recip = 32'b00000001010010101111110101101010;
8'd100: Recip = 32'b00000001010001111010111000010100;
8'd101: Recip = 32'b00000001010001000110111110000110;
8'd102: Recip = 32'b00000001010000010100000101000001;
8'd103: Recip = 32'b00000001001111100010001011001011;
8'd104: Recip = 32'b00000001001110110001001110110001;
8'd105: Recip = 32'b00000001001110000001001110000001;
8'd106: Recip = 32'b00000001001101010010000111001111;
8'd107: Recip = 32'b00000001001100100011111000110100;
8'd108: Recip = 32'b00000001001011110110100001001011;
8'd109: Recip = 32'b00000001001011001001111110110100;
8'd110: Recip = 32'b00000001001010011110010000010010;
8'd111: Recip = 32'b00000001001001110011010100001011;
8'd112: Recip = 32'b00000001001001001001001001001001;
8'd113: Recip = 32'b00000001001000011111101101111000;
8'd114: Recip = 32'b00000001000111110111000001000111;
8'd115: Recip = 32'b00000001000111001111000001101010;
8'd116: Recip = 32'b00000001000110100111101110010110;
8'd117: Recip = 32'b00000001000110000001000110000001;
8'd118: Recip = 32'b00000001000101011011000111100101;
8'd119: Recip = 32'b00000001000100110101110010000001;
8'd120: Recip = 32'b00000001000100010001000100010001;
8'd121: Recip = 32'b00000001000011101100111101010110;
8'd122: Recip = 32'b00000001000011001001011100010100;
8'd123: Recip = 32'b00000001000010100110100000010000;
8'd124: Recip = 32'b00000001000010000100001000010000;
8'd125: Recip = 32'b00000001000001100010010011011101;
8'd126: Recip = 32'b00000001000001000001000001000001;
8'd127: Recip = 32'b00000001000000100000010000001000;
8'd128: Recip = 32'b00000001000000000000000000000000;
8'd129: Recip = 32'b00000000111111100000001111111000;
8'd130: Recip = 32'b00000000111111000000111111000000;
8'd131: Recip = 32'b00000000111110100010001100101100;
8'd132: Recip = 32'b00000000111110000011111000001111;
8'd133: Recip = 32'b00000000111101100110000000111101;
8'd134: Recip = 32'b00000000111101001000100110001101;
8'd135: Recip = 32'b00000000111100101011100111010110;
8'd136: Recip = 32'b00000000111100001111000011110000;
8'd137: Recip = 32'b00000000111011110010111010110111;
8'd138: Recip = 32'b00000000111011010111001100000011;
8'd139: Recip = 32'b00000000111010111011110110110010;
8'd140: Recip = 32'b00000000111010100000111010100000;
8'd141: Recip = 32'b00000000111010000110010110101100;
8'd142: Recip = 32'b00000000111001101100001010110100;
8'd143: Recip = 32'b00000000111001010010010110011000;
8'd144: Recip = 32'b00000000111000111000111000111000;
8'd145: Recip = 32'b00000000111000011111110001111000;
8'd146: Recip = 32'b00000000111000000111000000111000;
8'd147: Recip = 32'b00000000110111101110100101011100;
8'd148: Recip = 32'b00000000110111010110011111001000;
8'd149: Recip = 32'b00000000110110111110101101100001;
8'd150: Recip = 32'b00000000110110100111010000001101;
8'd151: Recip = 32'b00000000110110010000000110110010;
8'd152: Recip = 32'b00000000110101111001010000110101;
8'd153: Recip = 32'b00000000110101100010101110000000;
8'd154: Recip = 32'b00000000110101001100011101111011;
8'd155: Recip = 32'b00000000110100110110100000001101;
8'd156: Recip = 32'b00000000110100100000110100100000;
8'd157: Recip = 32'b00000000110100001011011010011111;
8'd158: Recip = 32'b00000000110011110110010001110100;
8'd159: Recip = 32'b00000000110011100001011010001010;
8'd160: Recip = 32'b00000000110011001100110011001100;
8'd161: Recip = 32'b00000000110010111000011100100111;
8'd162: Recip = 32'b00000000110010100100010110000111;
8'd163: Recip = 32'b00000000110010010000011111011010;
8'd164: Recip = 32'b00000000110001111100111000001100;
8'd165: Recip = 32'b00000000110001101001100000001100;
8'd166: Recip = 32'b00000000110001010110010111001000;
8'd167: Recip = 32'b00000000110001000011011100101111;
8'd168: Recip = 32'b00000000110000110000110000110000;
8'd169: Recip = 32'b00000000110000011110010010111011;
8'd170: Recip = 32'b00000000110000001100000011000000;
8'd171: Recip = 32'b00000000101111111010000000101111;
8'd172: Recip = 32'b00000000101111101000001011111010;
8'd173: Recip = 32'b00000000101111010110100100010000;
8'd174: Recip = 32'b00000000101111000101001001100100;
8'd175: Recip = 32'b00000000101110110011111011100111;
8'd176: Recip = 32'b00000000101110100010111010001011;
8'd177: Recip = 32'b00000000101110010010000101000011;
8'd178: Recip = 32'b00000000101110000001011100000010;
8'd179: Recip = 32'b00000000101101110000111110111011;
8'd180: Recip = 32'b00000000101101100000101101100000;
8'd181: Recip = 32'b00000000101101010000100111100110;
8'd182: Recip = 32'b00000000101101000000101101000000;
8'd183: Recip = 32'b00000000101100110000111101100011;
8'd184: Recip = 32'b00000000101100100001011001000010;
8'd185: Recip = 32'b00000000101100010001111111010011;
8'd186: Recip = 32'b00000000101100000010110000001011;
8'd187: Recip = 32'b00000000101011110011101011011101;
8'd188: Recip = 32'b00000000101011100100110001000001;
8'd189: Recip = 32'b00000000101011010110000000101011;
8'd190: Recip = 32'b00000000101011000111011010010001;
8'd191: Recip = 32'b00000000101010111000111101101001;
8'd192: Recip = 32'b00000000101010101010101010101010;
8'd193: Recip = 32'b00000000101010011100100001001010;
8'd194: Recip = 32'b00000000101010001110100000111111;
8'd195: Recip = 32'b00000000101010000000101010000000;
8'd196: Recip = 32'b00000000101001110010111100000101;
8'd197: Recip = 32'b00000000101001100101010111000100;
8'd198: Recip = 32'b00000000101001010111111010110101;
8'd199: Recip = 32'b00000000101001001010100111001111;
8'd200: Recip = 32'b00000000101000111101011100001010;
8'd201: Recip = 32'b00000000101000110000011001011110;
8'd202: Recip = 32'b00000000101000100011011111000011;
8'd203: Recip = 32'b00000000101000010110101100110001;
8'd204: Recip = 32'b00000000101000001010000010100000;
8'd205: Recip = 32'b00000000100111111101100000001001;
8'd206: Recip = 32'b00000000100111110001000101100101;
8'd207: Recip = 32'b00000000100111100100110010101101;
8'd208: Recip = 32'b00000000100111011000100111011000;
8'd209: Recip = 32'b00000000100111001100100011100001;
8'd210: Recip = 32'b00000000100111000000100111000000;
8'd211: Recip = 32'b00000000100110110100110001101111;
8'd212: Recip = 32'b00000000100110101001000011100111;
8'd213: Recip = 32'b00000000100110011101011100100010;
8'd214: Recip = 32'b00000000100110010001111100011010;
8'd215: Recip = 32'b00000000100110000110100011001000;
8'd216: Recip = 32'b00000000100101111011010000100101;
8'd217: Recip = 32'b00000000100101110000000100101110;
8'd218: Recip = 32'b00000000100101100100111111011010;
8'd219: Recip = 32'b00000000100101011010000000100101;
8'd220: Recip = 32'b00000000100101001111001000001001;
8'd221: Recip = 32'b00000000100101000100010110000000;
8'd222: Recip = 32'b00000000100100111001101010000101;
8'd223: Recip = 32'b00000000100100101111000100010011;
8'd224: Recip = 32'b00000000100100100100100100100100;
8'd225: Recip = 32'b00000000100100011010001010110011;
8'd226: Recip = 32'b00000000100100001111110110111100;
8'd227: Recip = 32'b00000000100100000101101000111000;
8'd228: Recip = 32'b00000000100011111011100000100011;
8'd229: Recip = 32'b00000000100011110001011101111001;
8'd230: Recip = 32'b00000000100011100111100000110101;
8'd231: Recip = 32'b00000000100011011101101001010010;
8'd232: Recip = 32'b00000000100011010011110111001011;
8'd233: Recip = 32'b00000000100011001010001010011100;
8'd234: Recip = 32'b00000000100011000000100011000000;
8'd235: Recip = 32'b00000000100010110111000000110100;
8'd236: Recip = 32'b00000000100010101101100011110010;
8'd237: Recip = 32'b00000000100010100100001011111000;
8'd238: Recip = 32'b00000000100010011010111001000000;
8'd239: Recip = 32'b00000000100010010001101011000111;
8'd240: Recip = 32'b00000000100010001000100010001000;
8'd241: Recip = 32'b00000000100001111111011110000000;
8'd242: Recip = 32'b00000000100001110110011110101011;
8'd243: Recip = 32'b00000000100001101101100100000101;
8'd244: Recip = 32'b00000000100001100100101110001010;
8'd245: Recip = 32'b00000000100001011011111100110111;
8'd246: Recip = 32'b00000000100001010011010000001000;
8'd247: Recip = 32'b00000000100001001010100111111001;
8'd248: Recip = 32'b00000000100001000010000100001000;
8'd249: Recip = 32'b00000000100000111001100100110000;
8'd250: Recip = 32'b00000000100000110001001001101110;
8'd251: Recip = 32'b00000000100000101000110010111111;
8'd252: Recip = 32'b00000000100000100000100000100000;
8'd253: Recip = 32'b00000000100000011000010010001101;
8'd254: Recip = 32'b00000000100000010000001000000100;
8'd255: Recip = 32'b00000000100000001000000010000000;
default:Recip = 32'b00000000000000000000000000000000;
endcase
end 我加入我的实时图像显示系统里，程序显示效果良好。
对于gamma矫正的代码来说，有四个控制矫正的信号。
Contrast_sig 是调整暗度的选择信号，Bright_sig 是调制亮度的选择信号，Contrast 是8位的暗度值（0-255），Bright 是8位的亮度值（0-255）。
通过修改这几位数据，就能实现不同情况下的Gamma矫正，建议在调试的时候用按键来步进，查看哪个值的时候图像情况最好，然后再把gamma值用parameter固定。