ImageWaveformPlot
ImageWaveformPlot[image] plots the waveform of image.
ImageWaveformPlot[image, colorspace]plots the waveform of image in colorspace.ImageWaveformPlot[image, channel]plots the waveform for the specified channel.
Examples
Plot the waveform of an image:
ImageWaveformPlot[ExampleData[{"TestImage", "Mandrill"}]]Plot in a specific color space:
ImageWaveformPlot[img, "RGB"]Please visit the official Wolfram Language Reference for more details.