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Support multi words suggestion

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result: I4d097612db2f2a93522

Change-Id: Iedbb24f431dac43e52b6dcce8cb610a75e0ca46e
This commit is contained in:
satok 2012-01-30 18:18:30 +09:00
parent fd6a52c8d5
commit a85f4929cd
5 changed files with 125 additions and 64 deletions
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104
native/src/correction.cpp
View file

@ -159,10 +159,10 @@ void Correction::checkState() {
}
}
int Correction::getFreqForSplitTwoWords(const int *freqArray, const int *wordLengthArray,
const bool isSpaceProximity, const unsigned short *word) {
return Correction::RankingAlgorithm::calcFreqForSplitTwoWords(freqArray, wordLengthArray, this,
isSpaceProximity, word);
int Correction::getFreqForSplitMultipleWords(const int *freqArray, const int *wordLengthArray,
const int wordCount, const bool isSpaceProximity, const unsigned short *word) {
return Correction::RankingAlgorithm::calcFreqForSplitMultipleWords(freqArray, wordLengthArray,
wordCount, this, isSpaceProximity, word);
}
int Correction::getFinalFreq(const int freq, unsigned short **word, int *wordLength) {
@ -911,45 +911,85 @@ int Correction::RankingAlgorithm::calculateFinalFreq(const int inputIndex, const
}
/* static */
int Correction::RankingAlgorithm::calcFreqForSplitTwoWords(
const int *freqArray, const int *wordLengthArray, const Correction* correction,
const bool isSpaceProximity, const unsigned short *word) {
const int firstFreq = freqArray[0];
const int secondFreq = freqArray[1];
const int firstWordLength = wordLengthArray[0];
const int secondWordLength = wordLengthArray[1];
int Correction::RankingAlgorithm::calcFreqForSplitMultipleWords(
const int *freqArray, const int *wordLengthArray, const int wordCount,
const Correction* correction, const bool isSpaceProximity, const unsigned short *word) {
const int typedLetterMultiplier = correction->TYPED_LETTER_MULTIPLIER;
bool firstCapitalizedWordDemotion = false;
if (firstWordLength >= 2) {
firstCapitalizedWordDemotion = isUpperCase(word[0]);
bool secondCapitalizedWordDemotion = false;
{
// TODO: Handle multiple capitalized word demotion properly
const int firstWordLength = wordLengthArray[0];
const int secondWordLength = wordLengthArray[1];
if (firstWordLength >= 2) {
firstCapitalizedWordDemotion = isUpperCase(word[0]);
}
if (secondWordLength >= 2) {
// FIXME: word[firstWordLength + 1] is incorrect.
secondCapitalizedWordDemotion = isUpperCase(word[firstWordLength + 1]);
}
}
bool secondCapitalizedWordDemotion = false;
if (secondWordLength >= 2) {
secondCapitalizedWordDemotion = isUpperCase(word[firstWordLength + 1]);
}
const bool capitalizedWordDemotion =
firstCapitalizedWordDemotion ^ secondCapitalizedWordDemotion;
if (firstWordLength == 0 || secondWordLength == 0) {
int totalLength = 0;
int totalFreq = 0;
for (int i = 0; i < wordCount; ++i){
const int wordLength = wordLengthArray[i];
if (wordLength <= 0) {
return 0;
}
totalLength += wordLength;
const int demotionRate = 100 - TWO_WORDS_CORRECTION_DEMOTION_BASE / (wordLength + 1);
int tempFirstFreq = freqArray[i];
multiplyRate(demotionRate, &tempFirstFreq);
totalFreq += tempFirstFreq;
}
if (totalLength <= 0 || totalFreq <= 0) {
return 0;
}
const int firstDemotionRate = 100 - TWO_WORDS_CORRECTION_DEMOTION_BASE / (firstWordLength + 1);
int tempFirstFreq = firstFreq;
multiplyRate(firstDemotionRate, &tempFirstFreq);
const int secondDemotionRate = 100
- TWO_WORDS_CORRECTION_DEMOTION_BASE / (secondWordLength + 1);
int tempSecondFreq = secondFreq;
multiplyRate(secondDemotionRate, &tempSecondFreq);
const int totalLength = firstWordLength + secondWordLength;
// TODO: Currently totalFreq is adjusted to two word metrix.
// Promote pairFreq with multiplying by 2, because the word length is the same as the typed
// length.
int totalFreq = tempFirstFreq + tempSecondFreq;
totalFreq = totalFreq * 2 / wordCount;
if (wordCount > 2) {
// Safety net for 3+ words -- Caveats: many heuristics and workarounds here.
int oneLengthCounter = 0;
int twoLengthCounter = 0;
for (int i = 0; i < wordCount; ++i) {
const int wordLength = wordLengthArray[i];
// TODO: Use bigram instead of this safety net
if (i < wordCount - 1) {
const int nextWordLength = wordLengthArray[i + 1];
if (wordLength == 1 && nextWordLength == 2) {
// Safety net to filter 1 length and 2 length sequential words
return 0;
}
}
const int freq = freqArray[i];
// Demote too short weak words
if (wordLength <= 4 && freq <= MAX_FREQ * 2 / 3 /* heuristic... */) {
multiplyRate(100 * freq / MAX_FREQ, &totalFreq);
}
if (wordLength == 1) {
++oneLengthCounter;
} else if (wordLength == 2) {
++twoLengthCounter;
}
if (oneLengthCounter >= 2 || (oneLengthCounter + twoLengthCounter) >= 4) {
// Safety net to filter too many short words
return 0;
}
}
multiplyRate(MULTIPLE_WORDS_DEMOTION_RATE, &totalFreq);
}
// This is a workaround to try offsetting the not-enough-demotion which will be done in
// calcNormalizedScore in Utils.java.
@ -993,9 +1033,9 @@ int Correction::RankingAlgorithm::calcFreqForSplitTwoWords(
}
if (DEBUG_CORRECTION_FREQ) {
AKLOGI("Two words (%d, %d) (%d, %d) %d, %d", firstFreq, secondFreq, firstWordLength,
secondWordLength, capitalizedWordDemotion, totalFreq);
DUMP_WORD(word, firstWordLength);
AKLOGI("Multiple words (%d, %d) (%d, %d) %d, %d", freqArray[0], freqArray[1],
wordLengthArray[0], wordLengthArray[1], capitalizedWordDemotion, totalFreq);
DUMP_WORD(word, wordLengthArray[0]);
}
return totalFreq;

10
native/src/correction.h
View file

@ -121,9 +121,9 @@ class Correction {
bool needsToPrune() const;
int getFreqForSplitTwoWords(
const int *freqArray, const int *wordLengthArray, const bool isSpaceProximity,
const unsigned short *word);
int getFreqForSplitMultipleWords(
const int *freqArray, const int *wordLengthArray, const int wordCount,
const bool isSpaceProximity, const unsigned short *word);
int getFinalFreq(const int freq, unsigned short **word, int* wordLength);
int getFinalFreqForSubQueue(const int freq, unsigned short **word, int* wordLength,
const int inputLength);
@ -151,8 +151,8 @@ class Correction {
static int calculateFinalFreq(const int inputIndex, const int depth,
const int freq, int *editDistanceTable, const Correction* correction,
const int inputLength);
static int calcFreqForSplitTwoWords(const int *freqArray, const int *wordLengthArray,
const Correction* correction, const bool isSpaceProximity,
static int calcFreqForSplitMultipleWords(const int *freqArray, const int *wordLengthArray,
const int wordCount, const Correction* correction, const bool isSpaceProximity,
const unsigned short *word);
static double calcNormalizedScore(const unsigned short* before, const int beforeLength,
const unsigned short* after, const int afterLength, const int score);

8
native/src/defines.h
View file

@ -208,6 +208,7 @@ static void prof_out(void) {
#define ZERO_DISTANCE_PROMOTION_RATE 110
#define NEUTRAL_SCORE_SQUARED_RADIUS 8.0f
#define HALF_SCORE_SQUARED_RADIUS 32.0f
#define MAX_FREQ 255
// This must be greater than or equal to MAX_WORD_LENGTH defined in BinaryDictionary.java
// This is only used for the size of array. Not to be used in c functions.
@ -222,7 +223,9 @@ static void prof_out(void) {
#define SUB_QUEUE_MAX_WORDS 1
#define SUB_QUEUE_MAX_COUNT 10
#define SUB_QUEUE_MIN_WORD_LENGTH 4
#define MULTIPLE_WORDS_SUGGESTION_MAX_WORDS 2
#define MULTIPLE_WORDS_SUGGESTION_MAX_WORDS 10
#define MULTIPLE_WORDS_DEMOTION_RATE 80
#define MIN_INPUT_LENGTH_FOR_THREE_OR_MORE_WORDS_CORRECTION 6
#define TWO_WORDS_CORRECTION_WITH_OTHER_ERROR_THRESHOLD 0.39
#define START_TWO_WORDS_CORRECTION_THRESHOLD 0.22
@ -230,7 +233,6 @@ static void prof_out(void) {
#define MAX_DEPTH_MULTIPLIER 3
#define FIRST_WORD_INDEX 0
#define SECOND_WORD_INDEX 1
// TODO: Reduce this constant if possible; check the maximum number of umlauts in the same German
// word in the dictionary
@ -248,7 +250,7 @@ template<typename T> inline T max(T a, T b) { return a > b ? a : b; }
#define NEUTRAL_AREA_RADIUS_RATIO 1.3f
// DEBUG
#define INPUTLENGTH_FOR_DEBUG 10
#define INPUTLENGTH_FOR_DEBUG -1
#define MIN_OUTPUT_INDEX_FOR_DEBUG -1
#endif // LATINIME_DEFINES_H

65
native/src/unigram_dictionary.cpp
View file

@ -224,7 +224,7 @@ void UnigramDictionary::getWordSuggestions(ProximityInfo *proximityInfo,
// Multiple word suggestions
if (SUGGEST_MULTIPLE_WORDS
&& inputLength >= MIN_USER_TYPED_LENGTH_FOR_MULTIPLE_WORD_SUGGESTION) {
getSplitTwoWordsSuggestions(proximityInfo, xcoordinates, ycoordinates, codes,
getSplitMultipleWordsSuggestions(proximityInfo, xcoordinates, ycoordinates, codes,
useFullEditDistance, inputLength, correction, queuePool,
hasAutoCorrectionCandidate);
}
@ -445,17 +445,18 @@ bool UnigramDictionary::getSubStringSuggestion(
if (outputWordStartPos + nextWordLength >= MAX_WORD_LENGTH) {
return false;
}
outputWord[outputWordStartPos + tempOutputWordLength] = SPACE;
outputWord[tempOutputWordLength] = SPACE;
if (outputWordLength) {
++*outputWordLength;
}
} else if (currentWordIndex >= 1) {
// TODO: Handle 3 or more words
const int pairFreq = correction->getFreqForSplitTwoWords(
freqArray, wordLengthArray, isSpaceProximity, outputWord);
const int pairFreq = correction->getFreqForSplitMultipleWords(
freqArray, wordLengthArray, currentWordIndex + 1, isSpaceProximity, outputWord);
if (DEBUG_DICT) {
AKLOGI("Split two words: %d, %d, %d, %d, (%d)", freqArray[0], freqArray[1], pairFreq,
inputLength, wordLengthArray[0]);
DUMP_WORD(outputWord, tempOutputWordLength);
AKLOGI("Split two words: %d, %d, %d, %d, (%d) %d", freqArray[0], freqArray[1], pairFreq,
inputLength, wordLengthArray[0], tempOutputWordLength);
}
addWord(outputWord, tempOutputWordLength, pairFreq, queuePool->getMasterQueue());
}
@ -473,30 +474,46 @@ void UnigramDictionary::getMultiWordsSuggestionRec(ProximityInfo *proximityInfo,
// Return if the last word index
return;
}
for (int i = 1; i < inputLength; ++i) {
int tempOutputWordLength = 0;
// First word
int inputWordStartPos = 0;
int inputWordLength = i;
if (startWordIndex >= 1
&& (hasAutoCorrectionCandidate
|| inputLength < MIN_INPUT_LENGTH_FOR_THREE_OR_MORE_WORDS_CORRECTION)) {
// Do not suggest 3+ words if already has auto correction candidate
return;
}
for (int i = startInputPos + 1; i < inputLength; ++i) {
if (DEBUG_CORRECTION_FREQ) {
AKLOGI("Two words, %d", inputWordLength);
AKLOGI("Multi words(%d), start in %d sep %d start out %d",
startWordIndex, startInputPos, i, outputWordLength);
DUMP_WORD(outputWord, outputWordLength);
}
int tempOutputWordLength = 0;
// Current word
int inputWordStartPos = startInputPos;
int inputWordLength = i - startInputPos;
if (!getSubStringSuggestion(proximityInfo, xcoordinates, ycoordinates, codes,
useFullEditDistance, correction, queuePool, inputLength, hasAutoCorrectionCandidate,
FIRST_WORD_INDEX, inputWordStartPos, inputWordLength, 0, true /* not used */,
freqArray, wordLengthArray, outputWord, &tempOutputWordLength)) {
startWordIndex, inputWordStartPos, inputWordLength, outputWordLength,
true /* not used */, freqArray, wordLengthArray, outputWord,
&tempOutputWordLength)) {
continue;
}
// Second word
if (DEBUG_CORRECTION_FREQ) {
AKLOGI("Do missing space correction");
}
// Next word
// Missing space
inputWordStartPos = i;
inputWordLength = inputLength - i;
getSubStringSuggestion(proximityInfo, xcoordinates, ycoordinates, codes,
if(!getSubStringSuggestion(proximityInfo, xcoordinates, ycoordinates, codes,
useFullEditDistance, correction, queuePool, inputLength, hasAutoCorrectionCandidate,
SECOND_WORD_INDEX, inputWordStartPos, inputWordLength, tempOutputWordLength,
false /* missing space */, freqArray, wordLengthArray, outputWord,
0);
startWordIndex + 1, inputWordStartPos, inputWordLength, tempOutputWordLength,
false /* missing space */, freqArray, wordLengthArray, outputWord, 0)) {
getMultiWordsSuggestionRec(proximityInfo, xcoordinates, ycoordinates, codes,
useFullEditDistance, inputLength, correction, queuePool,
hasAutoCorrectionCandidate, inputWordStartPos, startWordIndex + 1,
tempOutputWordLength, freqArray, wordLengthArray, outputWord);
}
// Mistyped space
++inputWordStartPos;
@ -512,15 +529,17 @@ void UnigramDictionary::getMultiWordsSuggestionRec(ProximityInfo *proximityInfo,
continue;
}
if (DEBUG_CORRECTION_FREQ) {
AKLOGI("Do mistyped space correction");
}
getSubStringSuggestion(proximityInfo, xcoordinates, ycoordinates, codes,
useFullEditDistance, correction, queuePool, inputLength, hasAutoCorrectionCandidate,
SECOND_WORD_INDEX, inputWordStartPos, inputWordLength, tempOutputWordLength,
true /* mistyped space */, freqArray, wordLengthArray, outputWord,
0);
startWordIndex + 1, inputWordStartPos, inputWordLength, tempOutputWordLength,
true /* mistyped space */, freqArray, wordLengthArray, outputWord, 0);
}
}
void UnigramDictionary::getSplitTwoWordsSuggestions(ProximityInfo *proximityInfo,
void UnigramDictionary::getSplitMultipleWordsSuggestions(ProximityInfo *proximityInfo,
const int *xcoordinates, const int *ycoordinates, const int *codes,
const bool useFullEditDistance, const int inputLength,
Correction *correction, WordsPriorityQueuePool* queuePool,

2
native/src/unigram_dictionary.h
View file

@ -101,7 +101,7 @@ class UnigramDictionary {
const bool useFullEditDistance, const int inputLength, Correction *correction,
WordsPriorityQueuePool* queuePool, const bool doAutoCompletion, const int maxErrors,
const int currentWordIndex);
void getSplitTwoWordsSuggestions(ProximityInfo *proximityInfo,
void getSplitMultipleWordsSuggestions(ProximityInfo *proximityInfo,
const int *xcoordinates, const int *ycoordinates, const int *codes,
const bool useFullEditDistance, const int inputLength,
Correction *correction, WordsPriorityQueuePool* queuePool,