In today's business world, the use of the built-in camera functions of mobile devices continues to expand.
For example, photos of customer business cards are taken and saved using smart phones. Photos of what is written on marker boards are likewise taken and attached to the books of minutes. However, depending on the conditions when taking photos, there are cases in which the images can not be made out easily due to image distortion or the degradation of brightness and saturation.Note1
Fuji Xerox developed "Camera Image Correction Technology" in order to improve the visibility of document images of written information taken by cameras on such mobile devices as smart phones. This technology consists of geometric distortion correction (to correct image distortion) and color reproduction correction (to correct the brightness and saturation of images).
Fig. 1 below shows "geometric distortion correction", which corrects the distortion of images in photos of business cards or written marker boards and only cuts out the necessary regions of the image.
Fig. 1: Geometric Distortion Correction
Next, the brightness and saturation of the image are corrected. Fig. 2 below shows "color reproduction correction" that reproduces images that are easy to make out.
The processes above can therefore reproduce color approximating that of the original document.
Fig. 2: Color Reproduction Correction
The example below shows how photos taken by smart phones can be corrected by combining geometric distortion correction with color reproduction correction.
Examples of Image Processing
(Business Card and Marker Board)