Radiometric calibration method of the general purpose digital camera and its application for the vegetation monitoring

Tokunaga Kenta; Moriyama Masao

doi:10.1117/12.977211

21 November 2012 Radiometric calibration method of the general purpose digital camera and its application for the vegetation monitoring

Tokunaga Kenta, Moriyama Masao

Author Affiliations +

Proceedings Volume 8524, Land Surface Remote Sensing; 85241Y (2012) https://doi.org/10.1117/12.977211
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

This paper shows a way to use a general digital camera as a multi spectral camera. The purposes of this development are cost reduction and simplified processing for the spectroscopic measurement. It is necessary for obtainning radiance in each pixel to know the camera’s sensitivity and spectral response. So authors used a camera which can store images as RAW format in this study. Authors estimated the camera’s RGB-sensitibities and RGB-responses based on discrete expression of RGB-responses, approximation of RGB- sensitivities and exposure relationship and simultaneous estimation scheme of sensitivity and response. So authors have been able to compute incident radiance from a RGB pixel value with 8bit accuracy. Also in this paper, authors developed the spectral response dividing method with a long-pass filter. As a primary application of this method, radiance based NDVI and red edge information can be estimated. The NDVI or red edge image is made from an image taken by a digital camera which has sensitivity in the near infrared spectrum. This image is validated by simultaneously measured radiance with a spectroradiometer.

Citation Download Citation

Tokunaga Kenta and Moriyama Masao "Radiometric calibration method of the general purpose digital camera and its application for the vegetation monitoring", Proc. SPIE 8524, Land Surface Remote Sensing, 85241Y (21 November 2012); https://doi.org/10.1117/12.977211

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available