I made a finger error, could everyone change their post type to 'CCD', which stands for 'charge coupled Device'.
This is the nature of the imagery pick up device on modern digital cameras. not CDD.
Some are called 'CMOS' types, but the main variant is a 'CCD' type device.
It's akin to calling a horse a house. It' grinds me a bit and it is even minimally embarrassing.
Some CCD technology and design data... in simple images:
What you see is a physical structure, of very fine peaks and valleys. This gives a grid pattern, and the residual electrical noise, combined with micro levels of light scatter..then combined with digitization gradations...ie, the digitization resolution limits themselves....this as a set, gives this 'micro grid pattern' to the black levels of any given CCD image pick up device, no matter how they are used.
The image I supplied that seemed to be black, was in fact, not black, it was a slightly magenta-black image. My monitor is corrected for proper light balance, color, contrast range, etc, in images - as best it can be.
Any form of the raw image data, the original data file from the CCD frame/image, will always have this grid pattern, in the blacks. It cannot be defeated, due to this triple source combined issue.
JPG files and whatever, in those files it may not be as clear, due to different types of aliasing algorithms used on the image, etc. The 'RAW' data, as it is known, will always show this grid in the deepest blacks of the given digitally captured image.
THIS is the spot where investigators can find the evidence of manipulation of images. we don't like to talk about that, as people might find a way around this point of understanding in creating faked imagery.
When it comes to looking at digital imagery of whatever, suspected UFO's etc, one always wants to get to the original data files, to the original source point, in order to see what exactly is going on.
Modern cameras in phones, even in digital cameras, they tend to capture images in jpg format, not in the RAW data format, as RAW data is uncompressed and not compromised in the slightest. The least level of manipulation of the data coming from the CCD. aka, the TIFF format. But it takes up too much data space. Modern DSLR's, +99% of them will give you the image in RAW TIFF format.
Big cine cameras, in the digital domain, they capture images and store them in the RAW format, or the "4444" format, which is an alternative which is almost as good, for most purposes.
The Chinese moon mission, would have a camera of very high resolution, and it would capture the images in RAW. Beyond a doubt, that would be the case. But you'll probably never see those files.