IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND MEDIUM

• US 20150009540A1
• Filed: 07/01/2014
• Published: 01/08/2015
• Est. Priority Date: 07/04/2013
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ono, Takashi
• Granted Patent: US 9,336,468 B2
• Time in Patent Office: Days
• US Class Current: 358/3.24
• CPC Class Codes: G06K 15/1813 Page description language recognition
• CPC Class Codes: G06K 15/1822 Analysing the received data before processing
• CPC Class Codes: G06K 15/1847 with provisions for image feature conservation or enhancement, e.g. character edge

Abstract

The image forming apparatus includes a PDL analysis unit, a DL generation unit, an edge enhancement determination unit configured to determine whether or not to perform edge enhancement processing for each image, an edge enhancement unit configured to perform edge enhancement processing, and a development processing unit configured to develop a DL into a bitmap. The DL generation unit generates a DL for image data within PDL data on which edge enhancement processing is not performed in the case where the edge enhancement determination unit determines not to perform edge enhancement processing, and generates a DL for image data within PDL data on which edge enhancement processing is performed in the case where the edge enhancement determination unit determines to perform edge enhancement processing.

Claims

1. An image forming apparatus comprising:

an edge enhancement unit configured to enhance an edge part of image data included in PDL data; and

a drawing unit configured to draw an image of data generated based on the results of analyzing image data after being subjected to edge enhancement processing by the edge enhancement unit and the PDL data.

11. A non-transitory computer readable storage medium storing a program for causing a computer to function as the image forming apparatus according to claim 1.

2. An image forming apparatus comprising:

a determination unit configured to determine whether to enhance an edge part of image data for the image data included in PDL data;

an edge enhancement unit configured to enhance the edge part of the image data in a case where the determination unit determines to enhance the edge part;

a generation unit configured to generate intermediate data based on the results of analyzing image data after being subjected to edge enhancement processing by the edge enhancement unit and the PDL data; and

an image drawing unit configured to draw an image of intermediate data generated by the generation unit.

3. The image forming apparatus according to claim 2, wherein

in a case where the determination unit determines to suppress enhancement of the edge part, the edge enhancement unit suppresses enhancement of the edge part of the image data.

4. The image forming apparatus according to claim 2, wherein

in a case where the image data is specified to be subjected to the ROP, the determination unit determines not to enhance the edge part of the image data or determines to suppress enhancement of the edge part.

5. The image forming apparatus according to claim 2, wherein

in a case where transmittance is specified for the image data, the determination unit determines not to enhance the edge part of the image data or determines to suppress enhancement of the edge part.

6. The image forming apparatus according to claim 2, wherein

in a case where the image data is not specified to be subjected to the ROP, the determination unit determines to enhance the edge part of the image data.

7. The image forming apparatus according to claim 2, wherein

in a case where the resolution of the image data is higher than a threshold, the determination unit determines to suppress enhancement of the edge part of the image data.

8. The image forming apparatus according to claim 2, wherein

in a case where the format of the image data is an index format, or in a case where the number of colors of the image data is smaller than a threshold, the determination unit determines to suppress enhancement of the edge part of the image data.

9. An image forming method comprising:

an edge enhancement step of enhancing an edge part of image data included in PDL data; and

a drawing step of drawing an image of data generated based on the results of analyzing image data after being subjected to edge enhancement processing in the edge enhancement step and the PDL data.

10. An image processing method comprising:

a determination step of determining whether to enhance an edge part of image data for the image data included in PDL data;

an edge enhancement step of enhancing, in a case where the determination step determines to enhance the edge part, the edge of the image data;

a generation step of generating intermediate data based on the results of analyzing image data after being subjected to edge enhancement processing in the edge enhancement step and the PDL data; and

a drawing step of drawing an image of intermediate data generated in the generation step.