04647197 is referenced by 37 patents and cites 6 patents.

In a distortion inspection apparatus of a glass plate, a light and dark contrast pattern is sensed by an image sensor through a glass plate. The number of bits corresponding to a light or dark portion is detected from bipolar image data which are divided into a plurality of bits along each of parallel scanning lines assumed upon a surface of the glass plate. Then, a distortion state of the surface of the glass plate is discriminated in accordance with the differences among the thus detected number of bits and a reference value thereof. In such an arrangement, quantitative distortion discrimination can be performed.

Title
Distortion inspection apparatus of a glass plate
Application Number
6/674608
Publication Number
4647197
Application Date
November 26, 1984
Publication Date
March 3, 1987
Inventor
Nagayoshi Ichise
Fukui
JP
Katsuhiko Kitaya
Tokyo
JP
Agent
McDougall Hersh & Scott
Assignee
Nippon Sheet Glass
JP
IPC
G01N 21/88
View Original Source