| 摘要 |
The disclosed embodiments illustrate methods and systems for image processing. The method includes dividing a portion of an image into a set of blocks, each block of which is divided into a set of sub-blocks. Thereafter, a measurable block is identified from the set of blocks based on a measurability criteria that comprises determining an average pixel value for each of the sub-blocks based on one or more pixels encompassed by respective sub-block. Further, a maximum average pixel value, a minimum average pixel value, and a range of average pixel values are determined among the set of sub-blocks. The measurability criteria further includes comparing the maximum average pixel value, the minimum average pixel value, and the range of average pixel values with respective pre-determined thresholds. The method further includes estimating a half-tone frequency of the portion based on a processing of the identified measurable block. |
| 主权项 |
1. A method for image processing, the method comprising:
dividing, by one or more processors, a portion of an image into a set of blocks, wherein each block in the set of blocks is divided into a set of sub-blocks; identifying, by the one or more processors, a measurable block, from the set of blocks, based on a measurability criteria, wherein the measurability criteria comprises:
determining, by the one or more processors, an average pixel value for each of the sub-blocks based on one or more pixels encompassed by respective sub-block,determining, by the one or more processors, a maximum average pixel value among the set of sub-blocks, a minimum average pixel value among the set of sub-blocks, and a range of average pixel values among the set of sub-blocks, based on the average pixel value for each of the sub-blocks,comparing, by the one or more processors, the maximum average pixel value, the minimum average pixel value, and the range of average pixel values with respective pre-determined thresholds; andestimating, by the one or more processors, a half-tone frequency of the portion based on a processing of the identified measurable block. |
