METHOD OF DIAGNOSING A PLANT AUTOMATICALLY AND DEVICE FOR EXECUTING METHOD THEREOF

An automatic plant diagnostic device and method are provided to inform disease conditions of the plant easily and early. An image memory of the device reads a color image of a plant and controls a display so as to display the image. An background color deleting unit deletes the background color from the color image on display, so that a leaf image can be obtained. A color change calculating unit detects values corresponding to hues of the leaf image and stores them in a memory on every date. After storing, the calculating unit further allows the display to display the values of hues on every date in form of a graph.