A simple nodejs express proxy server. Used to request a remote image with modified RGB channels.
{
url: 'http://example.com/cat.jpeg' // the url of the target image
r_min: 4, // min valid value for red channel
r_max: 70, // max valid value for red channel
g_min: 4, // min valid value for green channel
g_max: 40, // max valid value for green channel
b_min: 4, // min valid value for blue channel
b_max: 40, // max valid value for blue channel
}RGB params define the valid range for each channel, valid color values are then 'stretched' out to cover the 0-255 channel.
For example, we can query a true color satellite image from NASA and modify RGB channels so we see more detail in the green/blue channels - i.e. ocean colors.
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