公开(公告)号：US5383032A

公开(公告)日：1995-01-17

申请号：US888711

申请日：1992-05-27

申请人： Kazuhiro Eguchi ,  Hiroshi Imabayashi

发明人： Kazuhiro Eguchi ,  Hiroshi Imabayashi

IPC分类号： H04N1/407 ,  H04N1/46

CPC分类号： H04N1/4074

摘要： An image processing system which partitions an input image data into pixel density data representing a density of each of pixels of the input image and stores the pixel density data. The pixel density distribution of the input image is then computed by counting pixels of each density represented by the stored pixel density data. Accumulation data is then generated corresponding to each density represented by the pixel density data, and a data curve is generated and output representing accumulation data. The data curve representing accumulation data corresponding to each density represented by the pixel density data obtained from the input image data is read and used to correct the converted pixel density data by employing the data curve as a density correction curve indicating a relation between the pixel density data and a density data output. Further, the accumulation data corresponding to each density represented by the pixel density data represents a value proportional to the number of pixels having densities ranging from the lowest density to a density corresponding thereto.

摘要翻译： 一种图像处理系统，其将输入图像数据分割成表示输入图像的每个像素的密度的像素密度数据，并存储像素密度数据。 然后通过计算由存储的像素密度数据表示的每个密度的像素来计算输入图像的像素密度分布。 然后对应于由像素密度数据表示的每个密度生成累积数据，并生成表示累积数据的数据曲线并输出。 读取表示与由输入图像数据获得的像素密度数据表示的每个浓度相对应的累积数据的数据曲线，并用于通过使用数据曲线作为浓度校正曲线来校正转换的像素密度数据，该曲线指示像素密度 数据和密度数据输出。 此外，对应于由像素密度数据表示的每个密度的累加数据表示与具有从最低密度到与其对应的密度范围的密度的像素数量成比例的值。