1. An image processing system comprising: an imaging apparatus; and an image processing apparatus having a processor which uses an image picked up by the imaging apparatus to generate a display image and causes a display apparatus to display the display image, wherein the imaging apparatus includes: a first demosaicing section configured to acquire, using the processor, data of a non-processed image outputted from an imaging device and perform a demosaicing process and a correction process for the data of the non-processed image to generate a colored image; a transmission section configured to transmit data of at least part of each of the non-processed image, the colored image and process information acquired by the first demosaicing section in the course of generation of the colored image to the image processing apparatus; a reception section configured to receive the data transmitted from the imaging apparatus; a second demosaicing section configured to perform a demosaicing process and a correction process for the data of the transmitted non-processed image to generate a colored image; and a display image generation section configured to generate a display image using the colored image generated by the second demosaicing section and the colored image transmitted from the imaging apparatus, wherein the second demosaicing section utilizes the process information transmitted from the imaging apparatus in the course of at least one of the demosaicing process and the correction process, wherein the transmission section of the imaging apparatus transmits a color histogram of the colored image generated by the first demosaicing section as the process information to the image processing apparatus, and wherein the second demosaicing section of the image processing apparatus compares the transmitted color histogram with a color histogram of a reference image to derive a parameter necessary for the correction process.