jpeg2dct or cv2.dct

[YuqiangY]

This is a wonderful research idea and thought process. But I have a question now: Are there many differences between jpeg2dct and cv2.dct with blockwise? I have used them to do classification on Cifar10, but they have the same results almostly.

[DayBreak-u]

您好，请问cv2.dct 具体是怎么操作的呀？

[YuqiangY]

您好，请问cv2.dct 具体是怎么操作的呀？

貌似是利用到了fft，反正两者计算结果是有差别的，但是最终的效果差不多

[luowei0701]

您好，jpeg2dct后得到的dct_y、dct_cr、dct_cb ，他是（M,N,64）大小的，这个64维度是不是按照低频到高频排列的，有没有ZigZag呢？

[J-JunChen]

@LBJ23233 请问你利用OpenCV实现的，有对DCT输入进行Normalize进行归一化吗？

[B-JackMao]

Why does the model trained using data returned from jpeg2dct have such poor accuracy? It only achieves 66% accuracy on CIFAR-100