公开(公告)号：US5892852A

公开(公告)日：1999-04-06

申请号：US834849

申请日：1997-04-10

Applicant: Yoshiyuki Namizuka ,  Kouichi Kamon ,  Masaaki Ito ,  Hiroyuki Kawamoto ,  AnQi Ye ,  Takeharu Tone

Inventor： Yoshiyuki Namizuka ,  Kouichi Kamon ,  Masaaki Ito ,  Hiroyuki Kawamoto ,  AnQi Ye ,  Takeharu Tone

IPC: H04N1/40 ,  G06T5/00 ,  G06T5/20 ,  H04N1/405

CPC classification number: H04N1/40062 ,  H04N1/405

Abstract: An image processing apparatus includes a converter for reading out a manuscript image signal and converting the read-out signal to an electric signal. A signal processor executes signal processing for the electric signal, and an image generator generates an image in accordance with the processed signal. An outputting unit separates a character area and a photograph area of the manuscript from the read-out signal and outputs an area signal. A changing-over circuit changes over a filtering process in accordance with the area signal. A halftone processor executes in parallel a halftone process for the character area image and a halftone process for the photograph area image, and the changing-over circuit selectively changes over the halftone processing result for the character and the halftone processing result in accordance with the area signal.

Abstract translation: 图像处理装置包括用于读出原稿图像信号并将读出的信号转换为电信号的转换器。 信号处理器对电信号执行信号处理，并且图像发生器根据处理的信号生成图像。 输出单元从读出的信号中分离原稿的字符区域和照片区域，并输出区域信号。 转换电路根据区域信号改变滤波处理。 半色调处理器​​并行执行用于字符区域图像的半色调处理和用于照片区域图像的半色调处理，并且转换电路根据区域选择性地改变字符的半色调处理结果和半色调处理结果 信号。

公开(公告)号：US6053407A

公开(公告)日：2000-04-25

申请号：US742370

申请日：1996-11-01

Applicant: Ynjiun P. Wang ,  Anqi Ye

Inventor： Ynjiun P. Wang ,  Anqi Ye

IPC: G06K7/14 ,  G06K19/06 ,  G06K7/10

CPC classification number: G06K7/1421 ,  G06K19/06037 ,  G06K19/06168 ,  G06K7/14 ,  G06K7/1456 ,  G06K7/1486 ,  G06K7/1491

Abstract: Prior methods of reading MaxiCode dataforms have been subject to reduced resolution image scaling and processing and speed constraints of Fourier transform computations. Described spatial domain data extraction methods provide bull's eye center location by T-sequence pixel pattern analysis, axis identification by moment analysis of data cell pairs, and integral width square wave analysis of illumination transitions to avoid reading-line cell fragmentation. The center and top of a MaxiCode are identified in high-resolution pixel data, without scaling reduction or Fourier type frequency domain processing. Data is extracted serially from rows of data cells by sampling along lines of pixels aligned by fragmentation analysis so as to traverse complete rows of data cells. Dynamic thresholding accurately defines illumination value transitions between adjacent linear groups of data cells, each group consisting of one or more data cells of the same reflectivity. Application of disclosed methods to other types of dataforms is described.

Abstract translation: 读取MaxiCode数据形式的先前方法已经经历了傅里叶变换计算的降低的分辨率图像缩放和处理以及速度约束。 描述的空间域数据提取方法通过T序列像素图案分析，数据单元对的时间轴分析的轴识别和照明转换的积分宽度方波分析来提供公牛眼中心位置，以避免阅读线细胞分裂。 MaxiCode的中心和顶部以高分辨率像素数据识别，无缩放缩放或傅里叶类型频域处理。 通过沿着通过碎片分析对齐的像素线进行采样来数据从行数据单元中提取，以遍历数据单元的完整行。 动态阈值准确地定义了数据单元的相邻线性组之间的照明值转换，每组由相同反射率的一个或多个数据单元组成。 对所公开的方法应用于其他类型的数据形式进行了描述。