Image recognition apparatus and method for surface discrimination using reflected light
US7551768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Feb 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/3485
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an image recognition method, the image of a cream solder 9 printed on a rectangular electrode 16 having a solder leveler formed is picked up and recognized to identify the cream solder 9. An illuminating unit having white light source parts 35W arranged in the radial oblique directions of 45° is used to apply white color illumination lights from a light applying direction in which an angle of θ1 formed by the light applying direction and a horizontal plane in a vertical plane is 45° or smaller and from a light applying direction in which an angle of θ3 formed by the light applying direction and the boundary of the electrode 16 in a horizontal plane is 75° or smaller. Thus, regularly reflected lights from a solder leveler forming surface 16a with a glossiness are not received by an upper camera to identify a solder surface 9a and the solder leveler forming surface 16a with good accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.