An image processing device 300 which is capable of accurately detect pixels covered by cloud shadows and remove effects of the cloud shadows in an images are provided. The image processing device 300 for detection and correction of influence caused by one or more clouds includes: a cloud transmittance calculation unit 31 that calculates transmittance of the one or more clouds in an input image, for each pixel; a cloud height estimation unit 32 that determines estimation of a height from the ground to each cloud in the input image for the each pixel to detect position of corresponding one or more shadows; an attenuation factor estimation unit 33 that calculates attenuation factors for the direct sun irradiance by applying an averaging filter to the cloud transmittance calculated, for the each pixel; and a shadow removal unit 34 that corrects pixels affected by the one or more shadows, based on a physical model of a cloud shadow formation by employing the attenuation factors calculated and the position, and outputs an image which includes the pixels corrected.