发明名称 |
Image processing method for distinguishing object by determining threshold of image lightness values |
摘要 |
An image processing method distinguishes an object from within an image area by determining a stable threshold value of light intensity values from within the image area. Received light is converted into image data denoting light intensity values of the received light at a plurality of points from within the image area. A bright portion average value denoting an average of the light intensity values which exceed a predetermined threshold and a dark portion average value denoting an average of the light intensity values which are less than the predetermined threshold are calculated. A new threshold is obtained by applying the bright portion average value and the dark portion average value to a predetermined dividing ratio. The object within the image area is distinguished using the new threshold. The method is also applicable to the use of multivalue thresholds. |
申请公布号 |
US5138671(A) |
申请公布日期 |
1992.08.11 |
申请号 |
US19900613983 |
申请日期 |
1990.11.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YOKOYAMA, HARUHIKO |
分类号 |
G06T1/00;G06K9/38;G06T5/40 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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