Hiromi Okubo
18Patents
13h-index
29Co-inventors
74Inventor score
Filing activity: Feb 8, 1988 → Nov 16, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5751854A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Electricity | 101 | Expired |
| US5647010A | Image forming apparatus with security feature which prevents copying of specific types of documents | Emerging Cross-Sectional Technologies | 77 | Expired |
| US6272248A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Physics | 66 | Expired |
| US5659628A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 57 | Expired |
| US5392137A | Image processing apparatus in which filtering is selected for input image characteristics | Electricity | 54 | Expired |
| US5410619A | Digital image processing apparatus for processing a variety of types of input image data | Electricity | 36 | Expired |
| US5652803A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 32 | Expired |
| US5781653A | Image processing apparatus for determining copying-inhibited document | Physics | 28 | Expired |
| US6556707B1 | Method and apparatus for image processing for performing a color conversion | Electricity | 27 | Expired |
| US6041139A | Image processing apparatus | Physics | 24 | Expired |
| US4979129A | Digital color converting apparatus for color image processor | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7088472B1 | Method, system, and apparatus for image forming and processing capable of appropriately adjusting input and output properties | Electricity | 13 | Expired |
| US6987886B1 | Image processing based on degree of white-background likeliness | Physics | 13 | Expired |
| US5473444A | Image processing device having function of detecting dotted-image area | Electricity | 11 | Expired |
| US6731817B2 | Apparatus and method for forming an image by processing input image data while suppressing banding and dropout | Physics | 8 | Expired |
| US6122406A | Image processing device | Physics | 6 | Expired |
| US7221466B2 | Image processing device, image processing method and image forming apparatus | Electricity | 3 | Expired |
| US7221799B2 | Image processing based on degree of white-background likeliness | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.