| 摘要 |
PROBLEM TO BE SOLVED: To prevent the character quality of an original from deteriorating in repeated copying, etc., and to reproduce an image, corresponding to character density of the original by producing a reproduced image signal, based on a character recognition result and a density detection result. SOLUTION: Read image data is stored once in an image buffer 8. Next, an average value of density of ambient pixels in the neighborhood of a pixel under notice is binarized as threshold, a histogram that integrates '1' and a binarized pixel number is produced in the direction of an orthogonally crossing column to each pixel row respectively and the number of characters arranged in short side of an original and the size of one average character can be detect. the original is divided into rectangular frames)(mesh) and one character each is included in a mesh. A character is recognized from a '1' pattern of a binary image binarized in one mesh and character code information is stored in the buffer 8. The detection of character density is calculated by multiplying the binarization results by the original multivalued density level, summing them and dividing them by the total number of 1s to every pixel in each mesh. |
