利用海思ann.bin分類模型,對下圖進行分類識別
(一)步驟
1、使用opencv訓練出字符分類模型ann.xml
2、使用海思提供的ive_too_xml2bin_ui工具,將上訴ann.xml模型轉換成ann.bin模型
3、新建工程,導入ann.bin,進行分類
(二)注意點:
1、已經歸一化的像素值,在轉換特徵時不需要重新歸一化(/255),如下代碼。
2、使用ann.bin特徵提取的流程 必須和 opencv訓練時一致。
void ANN_MLP_BinaryFeature2(Mat lowData, HI_U8 *imggray, HI_U16 width, HI_U16 height, HI_S16Q16 *binaryfeature)
{
HI_U16 featurenum = 0;
HI_U16 i, j;
//增加直方圖
const int VERTICAL = 0;
const int HORIZONTAL = 1;
Mat vhist = ProjectedHistogram(lowData, VERTICAL,0);
Mat hhist = ProjectedHistogram(lowData, HORIZONTAL,0);
for (int i = 0; i < vhist.cols; i++) {
binaryfeature[featurenum] = vhist.data[i];
featurenum++;
}
for (int i = 0; i < hhist.cols; i++) {
binaryfeature[featurenum] = hhist.data[i];
featurenum++;
}
for ( i = 0; i < height; i++)
{
for ( j = 0; j < width; j++)
{
binaryfeature[featurenum++] = imggray[i*width + j] * 65536;// / 255;導入的Mat圖片已經歸一化了,不需要重新除以255歸一化,這點很重要!!!
}
}
}
3、使用直方圖特徵,有利於得分差異化增大
未使用直方圖特徵信息
F:\HiIVE_PC_V2.1.0.6\sample\Debug\ANN.exe show ANN sample
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au16LayerCount = 3 .
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ann_char_0.bmp belong to class 0.
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au16LayerCount = 3 .
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ann_char_1.bmp belong to class 1.
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au16LayerCount = 3 .
picture i :0.412094, 0.210678, 0.603043
ann_char_2.bmp belong to class 2.
press any key to exit...
****************************************************************************************
使用了直方圖特徵信息
F:\HiIVE_PC_V2.1.0.6\sample\Debug\ANN.exe show ANN sample
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au16LayerCount = 3 .
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au16LayerCount = 3 .
picture i :0.210678, 0.210678, 0.639984
ann_char_2.bmp belong to class 2.
press any key to exit...
詳細使用步驟請看:海思ive ann-mlp使用說明