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so were going to look at the JPEG analysis now jpg is a highly successful image format especially for compressing extremely complex colored images especially around for the graphs and so on okay so a little bit of theory is that the way that JPEG works and is to take an eight-by-eight pixel block of an image such as this one here so it transforms it goes through the image one column a time and then by raw and so on and then it will transform each of these pixel blocks into some sort of coding okay so here we typically have RGB values defining the color of the pixel on the screen and fortunately our GPS is quite difficult to operate on especially in finding the light level or the brightness of the the image so we convert it into y which is the Manassa T its a brightness value into the blueness and into the redness so this this is a format thats typically used with inside TV type systems you can see here that the big green component has a very large effect on the brightness of the of
