Abstract: Studies were made to address if the environmental conditions such as lamp voltage, camera brand, focus and image resolution have some effects on the recognition of tobacco images. The relative color was used to fast and timely correct the errors in tobacco image recognition. The reference plane was made of the material with constant color. The tobacco picture was taken by digital camera under various treatments in the lamp box. The effects of environmental factors were identified through the analysis of characteristics of image color and changing style. The color difference between the tobacco color and reference plane was used to correct the errors. The results showed that lamp voltage, camera brand, focus and image resolution do influence the recognition results. The correction by using relative color yields satisfactory results for it decreases the effects of environment. This study laid foundations for the standardization of digital tobacco collection framework.

Key words: digital image, flue-cured tobacco leaf, image acquisition, influence, correction