Shinji Yamakawa
27Patents
11h-index
40Co-inventors
75Inventor score
Filing activity: Oct 11, 1988 → Oct 17, 2019
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 |
| US5892595A | Image reading apparatus for correct positioning of color component values of each picture element | Electricity | 72 | 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 |
| US5809366A | Method and system for calibrating a color copier | Electricity | 64 | Expired |
| US5465160A | Composite image forming apparatus for automatically combining document and image characters | Physics | 44 | Expired |
| US5444518A | Image forming apparatus which adds identification information to recorded images to prevent forgery | Electricity | 31 | Expired |
| US5333211A | Image processing apparatus for preventing occurrence of moire in a reconstructed image | Physics | 22 | Expired |
| US6014462A | Image processing apparatus and method for distinguishing alphanumeric symbols on a white background and those on a mesh pattern and individually processing such image data | Electricity | 21 | Expired |
| US5862434A | Method and apparatus for forming an image on an image transfer medium and a method of forming an image using the image transfer medium | Physics | 15 | Expired |
| US6965695B2 | Method and system for processing character edge area data | Electricity | 13 | Expired |
| US5801844A | Image processing apparatus | Electricity | 12 | Expired |
| US5204752A | Image processing apparatus having shadow composition capability using binary data thinning and thickening circuits and preset thinning and thickening width data | Physics | 11 | Expired |
| US7085013B2 | Image processing apparatus including low-linear-density dot region detection unit, and image forming apparatus including the same | Physics | 9 | Expired |
| US6655861B2 | Image processing apparatus including low-linear-density dot region detection unit, and image forming apparatus including the same | Physics | 8 | Expired |
| US5206718A | Color image processor for creating shadows and masks | Electricity | 7 | Expired |
| US7663783B2 | Image-processing device processing image data by judging a detected and expanded medium-density field as a non-character edge field | Electricity | 4 | Active |
| US7139100B2 | Image-processing device processing image data by judging a detected and expanded medium-density field as a non-character edge field | Electricity | 3 | Expired |
| US8374432B2 | Image processing apparatus, image forming apparatus, image processing method, and computer program product | Electricity | 2 | Active |
| US8917903B2 | Image inspection apparatus, image forming apparatus, image inspection method, and image inspection program | Performing Operations; Transporting | 2 | Active |
| US8810861B2 | Image processing apparatus, image noise detecting method, and computer-readable recording medium which averages pixel values of multiple pixels aligned in the sub-scanning direction | Electricity | 2 | Active |
| US8055084B2 | Image processing device, image compression method, image compression program, and recording medium | Electricity | 2 | Active |
| US4942542A | Image processing computer system optimized to reduce idle time of computer | Electricity | 2 | Expired |
| US11472907B2 | Polymerization catalyst composition, polymer manufacturing method, polymer, rubber composition, and tire | Chemistry; Metallurgy | 1 | Active |
| US8538086B2 | Image inspection apparatus, image inspection method, and computer program product | Electricity | 1 | Active |
| US10153244B2 | Display Device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.