发明名称 |
White balancing method and image capturing device |
摘要 |
A white balancing method includes capturing an original image with red (R), green (G) and blue (B) color channels; computing and converting the R, G and B color channels into original color histogram; stretching the original color histograms over the entire grayscale width from 0 to 255 values; and adjusting a color of the original image based on the stretched color histograms to obtain a white balanced image. In the computing and converting the original color histograms, a sampling length follows a formula of spanm=min{(2h, H), (2w, W)}, wherein h=[log2 H]+1, w=[log2 W]+1, H represents a height of the original image, W represents a width of the original image, [ ] is the Gaussian symbol, ( ) is greatest common divisor function, and min{ } means selecting the minimum value. An image capturing device using the white balancing method is also provided. |
申请公布号 |
US8767088(B2) |
申请公布日期 |
2014.07.01 |
申请号 |
US201213726665 |
申请日期 |
2012.12.26 |
申请人 |
Hon Hai Precision Industry Co., Ltd. |
发明人 |
Lin Kuo-Hung |
分类号 |
H04N9/75;H04N5/228 |
主分类号 |
H04N9/75 |
代理机构 |
Novak Druce Connolly Bove + Quigg LLP |
代理人 |
Novak Druce Connolly Bove + Quigg LLP |
主权项 |
1. A white balancing method, comprising:
capturing an original image, the original image including red (R), green (G) and blue (B) color channels; computing and converting the R, G and B color channels into original color histograms; stretching the original color histograms to form stretched color histograms distributed over an entire grayscale width from 0 to 255 values; and adjusting a color of the original image based on the stretched color histograms to obtain a white balanced image; wherein in the step of computing and converting the original color histograms, a sampling length follows a formula of spanm=min{(2h, H), (2w, W)}, wherein h=[log2 H]+1, w=[log2 W]+1, H represents a height of the original image, W represents a width of the original image, [ ] is the Gaussian symbol, ( ) is greatest common divisor function, and min{ } means selecting the minimum value. |
地址 |
New Taipei TW |