Image processing device and image processing method for executing image processing to detect object in image

An image processing method executing image processing using a processor in order to detect an object in an image imaged by an imaging device, comprising:

• a first imaging command step wherein the processor commands the imaging device to image the object;
• a first image acquisition step wherein the processor acquires a first image imaged by the imaging device in accordance with a command in the first imaging command step;
• an image production step in which the processor produces a second image where any of shade values is set with respect to each pixel so as to have a brightness distribution opposite to a brightness distribution of the first image;
• a first projection command step in which the processor commands a projection device to project the second image on the object;
• a second imaging command step in which the processor commands the imaging device to image the object projected with the second image;
• a second image acquisition step in which the processor acquires a third image imaged by the imaging device in accordance with a command in the second imaging command step;
• and
• an object information acquisition step in which the processor acquires information on the object in the third image based on the third image.