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https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
Implement new mask grading with forced corners in Dot Code
This commit is contained in:
Robin Stuart
parent
7409399438
commit
053c83d036
@ -105,6 +105,7 @@ const int score_array(char Dots[], int Hgt, int Wid) {
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int x, y, worstedge, first, last, sum;
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int penalty_local = 0;
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int penalty = 0;
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int t = 0, b = 0, l = 0, r = 0;
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// first, guard against "pathelogical" gaps in the array
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if (Hgt & 1) {
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@ -164,6 +165,10 @@ const int score_array(char Dots[], int Hgt, int Wid) {
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}
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worstedge = sum + last - first;
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worstedge *= Hgt;
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if (sum == 0) {
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t = 1;
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}
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sum = 0;
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first = -1;
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@ -183,6 +188,10 @@ const int score_array(char Dots[], int Hgt, int Wid) {
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if (sum < worstedge) {
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worstedge = sum;
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}
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if (sum == 0) {
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b = 2;
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}
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sum = 0;
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first = -1;
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@ -202,6 +211,10 @@ const int score_array(char Dots[], int Hgt, int Wid) {
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if (sum < worstedge) {
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worstedge = sum;
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}
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if (sum == 0) {
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l = 4;
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}
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sum = 0;
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first = -1;
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@ -221,6 +234,12 @@ const int score_array(char Dots[], int Hgt, int Wid) {
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if (sum < worstedge) {
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worstedge = sum;
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}
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if (sum == 0) {
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r = 8;
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}
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penalty += (t + b + l + r) * 100000;
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// throughout the array, count the # of unprinted 5-somes (cross patterns)
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// plus the # of printed dots surrounded by 8 unprinted neighbors
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@ -1057,7 +1076,7 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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}
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if (debug) {
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printf("\n\n");
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printf("\n");
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}
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return array_length;
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@ -1190,19 +1209,76 @@ void fold_dotstream(char dot_stream[], int width, int height, char dot_array[])
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}
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}
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void apply_mask(int mask, int data_length, unsigned char *masked_codeword_array, unsigned char *codeword_array, int ecc_length, char *dot_stream) {
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int weight = 0;
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int j;
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switch (mask) {
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case 0:
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masked_codeword_array[0] = 0;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = codeword_array[j];
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}
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break;
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case 1:
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masked_codeword_array[0] = 1;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 3;
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}
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break;
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case 2:
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masked_codeword_array[0] = 2;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 7;
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}
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break;
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case 3:
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masked_codeword_array[0] = 3;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 17;
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}
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break;
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}
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rsencode(data_length + 1, ecc_length, masked_codeword_array);
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}
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void force_corners(int width, int height, char *dot_array) {
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if (width % 2) {
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// "Vertical" symbol
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dot_array[0] = '1';
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dot_array[width - 1] = '1';
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dot_array[(height - 2) * width] = '1';
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dot_array[((height - 1) * width) - 1] = '1';
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dot_array[((height - 1) * width) + 1] = '1';
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dot_array[(height * width) - 2] = '1';
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} else {
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// "Horizontal" symbol
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dot_array[0] = '1';
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dot_array[width - 2] = '1';
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dot_array[(2 * width) - 1] = '1';
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dot_array[((height - 1) * width) - 1] = '1';
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dot_array[(height - 1) * width] = '1';
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dot_array[(height * width) - 2] = '1';
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}
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}
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int dotcode(struct zint_symbol *symbol, const unsigned char source[], int length) {
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int i, j, k;
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size_t jc, n_dots;
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int data_length, ecc_length;
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int min_dots, min_area;
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int height, width;
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int mask_score[4];
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int weight;
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int mask_score[8];
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size_t dot_stream_length;
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int high_score, best_mask;
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int binary_finish = 0;
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int debug = 0;
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int debug = symbol->debug;
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int padding_dots, is_first;
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int corners_forced = 0;
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#ifdef _MSC_VER
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unsigned char* masked_codeword_array;
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#endif
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@ -1226,6 +1302,11 @@ int dotcode(struct zint_symbol *symbol, const unsigned char source[], int length
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if (debug) {
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printf("Codeword length = %d, ECC length = %d\n", data_length, ecc_length);
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printf("Codewords: ");
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for (i = 0; i < data_length; i++) {
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printf("[%d] ",codeword_array[i]);
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}
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printf("\n");
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}
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min_dots = 9 * (data_length + 3 + (data_length / 2)) + 2;
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@ -1339,41 +1420,9 @@ int dotcode(struct zint_symbol *symbol, const unsigned char source[], int length
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/* Evaluate data mask options */
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for (i = 0; i < 4; i++) {
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switch (i) {
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case 0:
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masked_codeword_array[0] = 0;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = codeword_array[j];
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}
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break;
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case 1:
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weight = 0;
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masked_codeword_array[0] = 1;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 3;
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}
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break;
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case 2:
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weight = 0;
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masked_codeword_array[0] = 2;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 7;
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}
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break;
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case 3:
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weight = 0;
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masked_codeword_array[0] = 3;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 17;
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}
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break;
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}
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rsencode(data_length + 1, ecc_length, masked_codeword_array);
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apply_mask(i, data_length, masked_codeword_array, codeword_array, ecc_length, dot_stream);
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dot_stream_length = make_dotstream(masked_codeword_array, (data_length + ecc_length + 1), dot_stream);
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/* Add pad bits */
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@ -1399,52 +1448,55 @@ int dotcode(struct zint_symbol *symbol, const unsigned char source[], int length
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best_mask = i;
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}
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}
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/* Re-evaluate using forced corners if needed */
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if (best_mask <= (height * width) / 2) {
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corners_forced = 1;
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for (i = 0; i < 4; i++) {
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if (best_mask != 3) {
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/* Reprocess to get symbol with best mask */
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switch (best_mask) {
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case 0:
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masked_codeword_array[0] = 0;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = codeword_array[j];
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}
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break;
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case 1:
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weight = 0;
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masked_codeword_array[0] = 1;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 3;
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}
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break;
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case 2:
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weight = 0;
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masked_codeword_array[0] = 2;
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for (j = 0; j < data_length; j++) {
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masked_codeword_array[j + 1] = (weight + codeword_array[j]) % 113;
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weight += 7;
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}
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break;
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}
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apply_mask(i, data_length, masked_codeword_array, codeword_array, ecc_length, dot_stream);
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dot_stream_length = make_dotstream(masked_codeword_array, (data_length + ecc_length + 1), dot_stream);
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rsencode(data_length + 1, ecc_length, masked_codeword_array);
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dot_stream_length = make_dotstream(masked_codeword_array, (data_length + ecc_length + 1), dot_stream);
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/* Add pad bits */
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for (jc = dot_stream_length; jc < n_dots; jc++) {
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strcat(dot_stream, "1");
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}
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fold_dotstream(dot_stream, width, height, dot_array);
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} /* else { the version with the best mask is already in memory } */
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if (debug) {
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for (k = 0; k < height; k++) {
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for (j = 0; j < width; j++) {
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printf("%c", dot_array[(k * width) + j]);
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/* Add pad bits */
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for (jc = dot_stream_length; jc < n_dots; jc++) {
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strcat(dot_stream, "1");
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}
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fold_dotstream(dot_stream, width, height, dot_array);
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force_corners(width, height, dot_array);
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mask_score[i] = score_array(dot_array, height, width);
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if (debug) {
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printf("Mask %d score is %d\n", i, mask_score[i]);
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}
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printf("\n");
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}
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for (i = 0; i < 4; i++) {
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if (mask_score[i] > high_score) {
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high_score = mask_score[i];
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best_mask = i;
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}
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}
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}
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/* Apply best mask */
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apply_mask(i, data_length, masked_codeword_array, codeword_array, ecc_length, dot_stream);
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dot_stream_length = make_dotstream(masked_codeword_array, (data_length + ecc_length + 1), dot_stream);
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/* Add pad bits */
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for (jc = dot_stream_length; jc < n_dots; jc++) {
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strcat(dot_stream, "1");
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}
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fold_dotstream(dot_stream, width, height, dot_array);
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if (corners_forced) {
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force_corners(width, height, dot_array);
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}
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/* Copy values to symbol */
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