rnd_trans.py 文件源码

def adjust_hue(image, delta, name=None):
    with ops.op_scope([image], name, 'adjust_hue') as name:
        # Remember original dtype to so we can convert back if needed
        orig_dtype = image.dtype
        flt_image = tf.image.convert_image_dtype(image, tf.float32)

        hsv = gen_image_ops.rgb_to_hsv(flt_image)

        hue = tf.slice(hsv, [0, 0, 0, 0], [-1, -1, -1, 1])
        saturation = tf.slice(hsv, [0, 0, 0, 1], [-1, -1, -1, 1])
        value = tf.slice(hsv, [0, 0, 0, 2], [-1, -1, -1, 1])

        # Note that we add 2*pi to guarantee that the resulting hue is a positive
        # floating point number since delta is [-0.5, 0.5].
        hue = math_ops.mod(hue + (delta + 1.), 1.)

        hsv_altered = tf.concat(3, [hue, saturation, value])
        rgb_altered = gen_image_ops.hsv_to_rgb(hsv_altered)

        return tf.image.convert_image_dtype(rgb_altered, orig_dtype)