Inception-v3, I use C++ to achieve preprocess, but all predict false

[yangzq08]

My code as follows:

122 cv::Mat im_ori = cv::imread(image_file, 1);
123 /*
124 * preprocess image as Inception_v3 required
125 * crop -> resize -> normlize (-mean)/std
126 /
127 int short_edge;
128 if(im_ori.rows > im_ori.cols)
129 {
130 short_edge = im_ori.cols;
131 }
132 else
133 {
134 short_edge = im_ori.rows;
135 }
136 //printf("image size, row = %d, col = %d, short_edge = %d\n", im_ori.rows, im_ori.cols, short_edge);
137 int yMin = (im_ori.rows - short_edge) / 2;
138 int xMin = (im_ori.cols - short_edge) / 2;
139 int xMax = xMin + short_edge;
140 int yMax = yMin + short_edge;
141 cv::Mat croppedImg;
142 im_ori(cv::Rect(xMin,yMin,xMax,yMax)).copyTo(croppedImg);
143 //cv::imwrite("ori.jpg", im_ori);
144 //cv::imwrite("crop.jpg", croppedImg);
145
146 cv::Mat im;
147 resize(croppedImg, im, resize_size);
148 //cv::imwrite("resize.jpg", im);
149 int size = im.rows * im.cols;
150 mx_float ptr_image_r = image_data;
151 for(int i = 0; i < im.rows; i++)
152 {
153 uchar* data = im.ptr(i);
154 for(int j = 0; j < im.cols; j++)
155 {
156 mx_float r = (data[j] * 256 - 128) / 128.0;
157 *ptr_image_r++ = r;
158 }
159 }

I read preprocessing.py, it first crop, then resize, at last normalization.

Are my codes wrong?