From: Skullheadx <admonty1@gmail.com>
Date: Wed, 20 Nov 2024 17:20:24 +0000 (-0500)
Subject: unmask encoding region of the symbol
X-Git-Url: http://git.skullheadx.com/nixos/static/gitweb.css?a=commitdiff_plain;h=3227b4c4adf083d32d4a363d4ae7eac82c37043e;p=qrcodescanner.git

unmask encoding region of the symbol
---

diff --git a/camera.cpp b/camera.cpp
index 7ce54fd..e87d8ea 100644
--- a/camera.cpp
+++ b/camera.cpp
@@ -10,16 +10,25 @@ unsigned int distance(std::vector<bool> &v1, const std::vector<bool> &v2);
 void read_words_from_file(char const *filename, std::vector<std::vector<bool>> &symbol);
 
 std::vector<bool> get_format_info(std::vector<std::vector<bool>> &symbol);
+void decode_mask(std::vector<std::vector<bool>> &symbol, std::size_t mask_pattern);
 
 int main(){
 	std::vector<std::vector<bool>> symbol(21, std::vector<bool>(21,0));
 
 	read_words_from_file("output.pbm", symbol);
-	print(symbol);
+	//print(symbol);
 	
 	std::vector<bool> format_info = get_format_info(symbol);
 
-	print(format_info);
+	std::cout << "Format Info: "; print(format_info); std::cout << std::endl;
+	std::bitset<3> mask_pattern{};	
+	mask_pattern[0] = format_info[2];
+	mask_pattern[1] = format_info[3];
+	mask_pattern[2] = format_info[4];
+	decode_mask(symbol, mask_pattern.to_ulong());
+	
+	print(symbol);
+
 	
 	return 0;
 }
@@ -107,7 +116,7 @@ std::vector<bool> get_format_info(std::vector<std::vector<bool>> &symbol){
 		{1,1,1,1,0,1,0,1,1,0,0,1,0,0,0},
 		{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
 	};
-	
+	//print(format_info);	
 	std::vector<bool> mask = {1,0,1,0,1,0,0,0,0,0,1,0,0,1,0};
 	vec_xor(format_info, mask);
 
@@ -134,6 +143,55 @@ std::vector<bool> get_format_info(std::vector<std::vector<bool>> &symbol){
 	return format_info;
 }
 
+void decode_mask(std::vector<std::vector<bool>> &symbol, std::size_t mask_pattern){
+	std::vector<std::vector<bool>> data_mask(21, std::vector<bool> (21, 0));
+	for (std::size_t i{}; i < 21; ++i){
+		for (std::size_t j{}; j < 21; ++j){
+			if ((i < 9 && j < 9) || (i > 12 && j < 9) || (i < 9 && j > 12) || i == 6 || j == 6){
+				continue;
+			}
+			// 000
+			if (mask_pattern == 0 && (i+j)%2 == 0){
+				data_mask[i][j] = 1;
+			}
+			// 001
+			else if (mask_pattern == 1 && i % 2 == 0){
+				data_mask[i][j] = 1;
+			}
+			// 010
+			else if (mask_pattern == 2 && j % 3 == 0){
+				data_mask[i][j] = 1;
+			}
+			// 011
+			else if (mask_pattern == 3 && (i+j)%3 == 0){
+				data_mask[i][j] = 1;
+			}
+			// 100
+			else if (mask_pattern == 4 && (i / 2 + j / 3) % 2 == 0){
+				data_mask[i][j] = 1;
+			}
+			// 101
+			else if (mask_pattern == 5 && (i * j) % 2 + (i * j) % 3 == 0){
+				data_mask[i][j] = 1;
+			}	
+			// 110
+			else if (mask_pattern == 6 && ((i * j) % 2 + (i * j) % 3 ) % 2 == 0){
+				data_mask[i][j] = 1;
+			}	
+			// 111
+			else if (mask_pattern == 7 && (((i + j) % 2 + (i * j) % 3 ) % 2 == 0)){
+				data_mask[i][j] = 1;
+			}	
+		}
+	}	 
+	
+	for (std::size_t i{0}; i < 21; ++i){
+		for (std::size_t j{0}; j < 21; ++j){
+			symbol[i][j] = symbol[i][j] ^ data_mask[i][j];
+		}
+	}
+}
+
 void read_words_from_file(char const *filename, std::vector<std::vector<bool>> &symbol) {
 	std::ifstream file{ filename };
 	if (!file.is_open()) {
diff --git a/output.pbm b/output.pbm
index 363237f..dbea2aa 100644
--- a/output.pbm
+++ b/output.pbm
@@ -1,23 +1,23 @@
 P1
 21 21
-1 1 1 1 1 1 1 0 1 0 0 0 0 0 1 1 1 1 1 1 1 
-1 0 0 0 0 0 1 0 0 1 0 1 1 0 1 0 0 0 0 0 1 
-1 0 1 1 1 0 1 0 0 0 0 0 1 0 1 0 1 1 1 0 1 
-1 0 1 1 1 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 1 
-1 0 1 1 1 0 1 0 1 1 1 0 0 0 1 0 1 1 1 0 1 
+1 1 1 1 1 1 1 0 0 1 1 0 0 0 1 1 1 1 1 1 1 
 1 0 0 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0 0 0 1 
+1 0 1 1 1 0 1 0 0 1 1 0 0 0 1 0 1 1 1 0 1 
+1 0 1 1 1 0 1 0 0 0 0 0 0 0 1 0 1 1 1 0 1 
+1 0 1 1 1 0 1 0 1 0 0 1 0 0 1 0 1 1 1 0 1 
+1 0 0 0 0 0 1 0 0 1 0 0 1 0 1 0 0 0 0 0 1 
 1 1 1 1 1 1 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 
-0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 
-1 0 0 0 1 0 1 1 1 0 0 0 0 1 1 1 1 1 0 0 1 
-0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 
-1 0 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 0 1 0 1 
-0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 1 1 1 
-1 0 1 1 1 0 1 1 1 1 0 1 0 0 0 1 1 0 1 0 0 
-0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 0 0 1 1 0 1 
-1 1 1 1 1 1 1 0 1 0 1 0 0 1 0 1 0 0 1 1 1 
-1 0 0 0 0 0 1 0 0 1 1 1 1 0 0 0 1 0 1 0 0 
-1 0 1 1 1 0 1 0 1 0 0 1 1 0 0 0 0 1 0 0 1 
-1 0 1 1 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 
-1 0 1 1 1 0 1 0 0 1 0 0 1 0 1 0 1 0 0 0 0 
-1 0 0 0 0 0 1 0 0 0 0 1 1 0 0 1 1 0 1 0 1 
-1 1 1 1 1 1 1 0 1 1 0 0 1 0 1 1 1 1 1 0 1 
+0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
+1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 
+1 1 1 0 1 1 0 1 0 1 1 1 1 1 0 1 1 0 0 1 0 
+0 1 0 0 0 1 1 0 0 0 1 0 1 1 0 1 1 0 0 1 1 
+1 1 1 0 1 1 0 1 0 1 1 0 1 1 1 1 0 1 1 1 0 
+0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 
+0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 1 
+1 1 1 1 1 1 1 0 0 1 0 0 0 1 0 1 1 1 1 1 1 
+1 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 0 1 1 1 
+1 0 1 1 1 0 1 0 1 1 0 1 1 0 0 0 1 0 0 0 0 
+1 0 1 1 1 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 
+1 0 1 1 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 
+1 0 0 0 0 0 1 0 0 1 1 1 1 0 1 0 0 1 0 0 0 
+1 1 1 1 1 1 1 0 1 0 0 0 1 0 1 1 1 1 1 1 1 
diff --git a/qrgenerator.cpp b/qrgenerator.cpp
index 442ad61..49ef0d9 100644
--- a/qrgenerator.cpp
+++ b/qrgenerator.cpp
@@ -28,7 +28,7 @@ int main() {
 	int k;
 	//std::cout << id_generator(69) << std::endl;
 	std::string input_data{"6969696969"};
-	const unsigned int input_length = 8;
+	const unsigned int input_length = 10;
 	std::vector<bool> input_data_vector{};
 	for (unsigned int i{0}; i < input_length; i+=3){
 /* 8 - 6 = 2