use the one colour of fft to replace last colour of src img.
put the imgs of fft and src together to train the model.
detect the images not in 3 channels.
call the showimage to transfer src imgs to fft imgs.
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将图片变为1通道.
三层文件夹结构的img三通道检测.
灰度图makebatch与灰度图与傅立叶2通道连接makebatch.
competition数据按照文件夹来切分数据makebatch.