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finish demosaic

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SikongJueluo
2024-05-10 20:13:58 +08:00
parent 990849702c
commit 7c9d5d7696
2 changed files with 196 additions and 6 deletions
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164
CFA/demosaic2.v Normal file
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module demosaic2 #(
parameter IM_WIDTH = 512, // 图像宽度
parameter IM_HEIGHT = 256, // 图像高度
parameter RAW_TYPE = 3 // 0:grbg 1:rggb 2:bggr 3:gbrg
)(
// 基本信号
input clk,
input reset,
// 数据输入信号
input data_en,
input [15:0] data_in [2:0], // 数据输入线，0、1、2分别表示第一、二、三行
output reg data_que, // 数据请求线，高电平：请求三个数据，直到读取完才拉低
output reg data_line, // 新一行请求数据线，高电平：请求九个数据，直到读取完才拉低
// en: 输出数据有效信号，高电平有效
output reg out_en,
output reg [15:0] out_r,
output reg [15:0] out_g,
output reg [15:0] out_b
);
// 常量，包括状态机
localparam IM_SIZE = IM_HEIGHT * IM_WIDTH;
localparam READ_DATA = 0;
localparam COLOR_GEN = 1;
localparam WRITE_DATA = 2;
localparam SLIDE_WINDOW = 3;
// 寄存器
reg [2:0] state, nextState;
reg [15:0] data_cache [2:0][2:0]; // 缓存颜色数据，行列3x3
reg [11:0] pos_x, pos_y; // 滑动窗口左上角位置
reg [1:0] cnt_data; // 记录输入数据数量，最大值256
reg [1:0] raw_type;
reg [15:0] red, blue, green;
// 三段状态机实现，窗口滑动，颜色计算
// 状态切换
always @(posedge clk or posedge reset) begin
if (reset)
state <= READ_DATA;
else
state <= nextState;
end
// 下一状态更新
always @(*) begin
case (state)
// 记录够3x3个数据后，进行rgb转换
READ_DATA: nextState = (cnt_data >= 3) ? COLOR_GEN : READ_DATA;
COLOR_GEN: nextState = WRITE_DATA;
WRITE_DATA: nextState = SLIDE_WINDOW;
SLIDE_WINDOW: nextState = READ_DATA;
endcase
end
// 各状态执行的操作
always @(posedge clk or posedge reset) begin
if (reset) begin
// 外部输出初始化
out_en <= 0;
out_r <= 0;
out_g <= 0;
out_r <= 0;
data_que <= 0;
data_line <= 1;
// 内部寄存器初始化
pos_x <= 0;
pos_y <= 0;
cnt_data <= 0;
raw_type <= RAW_TYPE;
end
else begin
// 状态机执行
case (state)
// 读取数据
READ_DATA: begin
data_que <= 1;
if (cnt_data < 2)
data_line <= 1;
if (data_en) begin
data_cache[cnt_data][0] <= data_in[0];
data_cache[cnt_data][1] <= data_in[1];
data_cache[cnt_data][2] <= data_in[2];
cnt_data <= cnt_data + 1;
end
end
COLOR_GEN: begin
// 取消数据请求
data_que <= 0;
data_line <= 0;
// 生成rgb图像
case (raw_type)
0: begin // Missing B, R on G
red <= (data_cache[0][1] + data_cache[2][1]) / 2;
blue <= (data_cache[1][0] + data_cache[1][2]) / 2;
green <= data_cache[1][1];
end
1: begin // Missing G, R on B
green <= (data_cache[0][1] + data_cache[1][0] + data_cache[1][2] + data_cache[2][1]) / 4;
red <= (data_cache[0][0] + data_cache[0][2] + data_cache[2][0] + data_cache[2][2]) / 4;
blue <= data_cache[1][1];
end
2: begin // Missing G, B on R
green <= (data_cache[0][1] + data_cache[1][0] + data_cache[1][2] + data_cache[2][1]) / 4;
blue <= (data_cache[0][0] + data_cache[0][2] + data_cache[2][0] + data_cache[2][2]) / 4;
red <= data_cache[1][1];
end
3: begin // Missing B, R on G
blue <= (data_cache[0][1] + data_cache[2][1]) / 2;
red <= (data_cache[1][0] + data_cache[1][2]) / 2;
green <= data_cache[1][1];
end
endcase
raw_type <= raw_type + 1;
end
WRITE_DATA: begin
out_en <= 1;
out_r <= red;
out_b <= blue;
out_g <= green;
end
SLIDE_WINDOW: begin
// 恢复相关寄存器变量
out_en <= 0;
// 记录位置寄存器自增，并处理缓存数据
pos_x <= pos_x + 1;
if (pos_x >= IM_WIDTH - 2) begin
cnt_data <= 0;
pos_x <= 0;
pos_y <= pos_y + 1;
// if (pos_y >= IM_HEIGHT - 2)
// pos_y <= 0;
end
else begin
cnt_data <= 2;
// 窗口右移
data_cache[0][0] = data_cache[0][1];
data_cache[1][0] = data_cache[1][1];
data_cache[2][0] = data_cache[2][1];
data_cache[0][1] = data_cache[0][2];
data_cache[1][1] = data_cache[1][2];
data_cache[2][1] = data_cache[2][2];
end
end
endcase
end
end
endmodule

38
isp.v
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`timescale 1ns/1ps
module isp #(
parameter IN_WIDTH = 1936;
parameter IN_HEIGHT = 1088;
parameter OUT_WIDTH = 1920;
parameter OUT_HEIGHT = 1080;
parameter IN_WIDTH = 1936,
parameter IN_HEIGHT = 1088,
parameter OUT_WIDTH = 1936 - 2,
parameter OUT_HEIGHT = 1088 - 2,
parameter RAW_TYPE = 3 // 0:grbg 1:rggb 2:bggr 3:gbrg
) (
input clk;
input reset;
// 基本信号
input clk,
input reset,
// 数据输入信号
input data_en,
input [15:0] data_in [2:0], // 数据输入线，0、1、2分别表示第一、二、三行
output reg data_que, // 数据请求线，高电平：请求三个数据，直到读取完才拉低
output reg data_line, // 新一行请求数据线，高电平：请求九个数据，直到读取完才拉低
// en: 输出数据有效信号，高电平有效
output reg out_en,
output reg [15:0] out_r,
output reg [15:0] out_g,
output reg [15:0] out_b
);
demosaic2 #(IN_WIDTH, IN_HEIGHT, RAW_TYPE) CFA (
.clk(clk),
.reset(reset),
.data_en(data_en),
.data_in(data_in),
.data_que(data_que),
.data_line(data_line),
.out_en(out_en),
.out_r(out_r),
.out_g(out_g),
.out_b(out_b)
);
endmodule