What does it mean when the shape of input images is (600,64,64,3)?

Question

While attempting an assignment, I found that shape of the input image was (600,64,64,3). I thought 3 stood for the number of channels but it's listed as the 4th dimension. What does this mean? This is in reference to convolutional neural networks.

Answer 1

The fourth dimension is because it is referring to either the full dataset(train/test) Or an individual batch.

600 - Number of images in the dataset or batch
64 x 64 - Size of each image
3 - Number of channels

Answer 2

600 can be the number of images of shape 64x64x3 and not only one image.