How to convert this Python code to C code?

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def decode(self, conv_output, anchors, stride):
        """
        return tensor of shape [batch_size, output_size, output_size, anchor_per_scale, 5 + num_classes]
               contains (x, y, w, h, score, probability)
        """

        conv_shape       = tf.shape(conv_output)
        batch_size       = conv_shape[0]
        output_size      = conv_shape[1]
        anchor_per_scale = len(anchors)

        conv_output = tf.reshape(conv_output, (batch_size, output_size, output_size, anchor_per_scale, 5 + self.num_class))

        conv_raw_dxdy = conv_output[:, :, :, :, 0:2]
        conv_raw_dwdh = conv_output[:, :, :, :, 2:4]
        conv_raw_conf = conv_output[:, :, :, :, 4:5]
        conv_raw_prob = conv_output[:, :, :, :, 5: ]

        y = tf.tile(tf.range(output_size, dtype=tf.int32)[:, tf.newaxis], [1, output_size])
        x = tf.tile(tf.range(output_size, dtype=tf.int32)[tf.newaxis, :], [output_size, 1])

        xy_grid = tf.concat([x[:, :, tf.newaxis], y[:, :, tf.newaxis]], axis=-1)
        xy_grid = tf.tile(xy_grid[tf.newaxis, :, :, tf.newaxis, :], [batch_size, 1, 1, anchor_per_scale, 1])
        xy_grid = tf.cast(xy_grid, tf.float32)

        pred_xy = (tf.sigmoid(conv_raw_dxdy) + xy_grid) * stride
        pred_wh = (tf.exp(conv_raw_dwdh) * anchors) * stride
        pred_xywh = tf.concat([pred_xy, pred_wh], axis=-1)

        pred_conf = tf.sigmoid(conv_raw_conf)
        pred_prob = tf.sigmoid(conv_raw_prob)

        return tf.concat([pred_xywh, pred_conf, pred_prob], axis=-1)

What I have tried:

Converting object oriented code to c program is difficult for me. Someone please guide me

Posted 24-Dec-19 20:29pm

Thịnh Nguyễn Minh

Updated 24-Dec-19 21:17pm

v2

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OriginalGriff · Answer 1 · 2019-12-24T21:17:00

Solution 1

Basically don't.
That code isn't particularly object oriented, but it does rely on a lot of Python framework features which aren't directly available in C. So to "convert the code" you'd have to start by replicating those features first, and that a lot of work.

Instead, work out what it's doing, and how it does it, and use that as a specification for your C code. It'll be a lot, lot quicker and easier than trying to convert it.

Posted 24-Dec-19 21:17pm

OriginalGriff

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Thịnh Nguyễn Minh 25-Dec-19 3:31am

https://github.com/YunYang1994/tensorflow-yolov3/blob/master/core/yolov3.py
This is all the code I have and I want to rewrite the other python code into C code. There is really no way to convert that code to C code?