fpga二值图像连通合并代码

以下是一个简单的FPGA二值图像连通合并的代码示例：

module ImageConnectivity(
  input wire clk,
  input wire rst,
  input wire [7:0] image_in,
  output wire [7:0] image_out
);

  reg [7:0] image_reg [0:7][0:7];
  reg [7:0] image_tmp [0:7][0:7];
  reg [7:0] image_out_reg [0:7][0:7];
  reg [7:0] image_out_tmp [0:7][0:7];
  reg [7:0] label [0:7][0:7];
  reg [7:0] label_tmp [0:7][0:7];
  reg [7:0] current_label;
  reg [7:0] neighbor_labels [0:7];
  reg [2:0] num_neighbors;
  reg [2:0] i, j, m, n;
  reg [2:0] x, y;
  reg [2:0] min_label;
  reg [2:0] label_changed;

  always @(posedge clk or posedge rst) begin
    if (rst) begin
      for (i = 0; i < 8; i = i + 1) begin
        for (j = 0; j < 8; j = j + 1) begin
          image_reg[i][j] <= 0;
          image_tmp[i][j] <= 0;
          image_out_reg[i][j] <= 0;
          image_out_tmp[i][j] <= 0;
          label[i][j] <= 0;
          label_tmp[i][j] <= 0;
        end
      end
      current_label <= 0;
      num_neighbors <= 0;
      min_label <= 0;
      label_changed <= 0;
    end else begin
      for (i = 0; i < 8; i = i + 1) begin
        for (j = 0; j < 8; j = j + 1) begin
          image_reg[i][j] <= image_in;
          image_tmp[i][j] <= image_reg[i][j];
          image_out_reg[i][j] <= image_out_tmp[i][j];
          label[i][j] <= label_tmp[i][j];
        end
      end

      // 连通合并处理
      for (i = 0; i < 8; i = i + 1) begin
        for (j = 0; j < 8; j = j + 1) begin
          if (image_reg[i][j] == 1) begin
            num_neighbors <= 0;
            if (i > 0 && image_tmp[i-1][j] == 1) begin
              neighbor_labels[num_neighbors] <= label_tmp[i-1][j];
              num_neighbors <= num_neighbors + 1;
            end
            if (i < 7 && image_tmp[i+1][j] == 1) begin
              neighbor_labels[num_neighbors] <= label_tmp[i+1][j];
              num_neighbors <= num_neighbors + 1;
            end
            if (j > 0 && image_tmp[i][j-1] == 1) begin
              neighbor_labels[num_neighbors] <= label_tmp[i][j-1];
              num_neighbors <= num_neighbors + 1;
            end
            if (j < 7 && image_tmp[i][j+1] == 1) begin
              neighbor_labels[num_neighbors] <= label_tmp[i][j+1];
              num_neighbors <= num_neighbors + 1;
            end

            if (num_neighbors == 0) begin
              current_label <= current_label + 1;
              label_tmp[i][j] <= current_label;
            end else begin
              min_label <= neighbor_labels[0];
              for (m = 1; m < num_neighbors; m = m + 1) begin
                if (neighbor_labels[m] < min_label) begin
                  min_label <= neighbor_labels[m];
                end
              end
              label_tmp[i][j] <= min_label;
            end
          end
        end
      end

      // 标签更新
      for (i = 0; i < 8; i = i + 1) begin
        for (j = 0; j < 8; j = j + 1) begin
          label_changed <= 0;
          if (label_tmp[i][j] != label[i][j]) begin
            label_changed <= 1;
            label[i][j] <= label_tmp[i][j];
          end
        end
      end

      // 输出图像
      for (i = 0; i < 8; i = i + 1) begin
        for (j = 0; j < 8; j = j + 1) begin
          if (image_reg[i][j] == 1) begin
            image_out_tmp[i][j] <= 1;
          end else begin
            image_out_tmp[i][j] <= 0;
          end
        end
      end

      if (label_changed == 1) begin
        for (i = 0; i < 8; i = i + 1) begin
          for (j = 0; j < 8; j = j + 1) begin
            image_out_reg[i][j] <= label[i][j];
          end
        end
      end
    end
  end

  assign image_out = image_out_reg[7][7];

endmodule

这个代码使用Verilog语言实现了一个简单的8x8的二值图像连通合并模块。该模块包含一个时钟信号`clk`、复位信号`rst`、输入图像信号`image_in`和输出图像信号`image_out`。输入图像是一个8x8的二值图像，其中1表示目标像素，0表示背景像素。输出图像是经过连通合并后的结果，目标区域被标记为唯一的标签。

请注意，这只是一个简单的示例代码，具体的实现可能会根据实际需求进行修改和优化。另外，该代码只实现了基本的连通合并功能，可能无法处理复杂的图像连通情况。如果需要更复杂的功能，请参考相关的图像处理算法和FPGA开发文档进行实现。