首页 \ 问答 \ OpenCV直方图到图像转换(OpenCV Histogram to Image Conversion)

OpenCV直方图到图像转换(OpenCV Histogram to Image Conversion)

我尝试了一些将灰度图像转换为直方图的教程,从而在直方图之间进行比较。 所以,我在double数据类型中获得了compare函数返回的值。 像这样

我现在的问题是,如何可视化图像之间检测到的“不匹配/错误”? 我可以喜欢获取那些不匹配像素的坐标并在该特定坐标处绘制一个矩形或圆形吗?

或者我可以采取任何算法建议?


I've tryout some tutorial of converting Grayscale image to Histogram and thus perform comparision between the histogram. So, I've obtained the value returned from compare function in double datatype. Like this.

My problem here now is, how can I visualize the "non-match/ error" detected between images? Can I like obtained back the coordinates of those non-match pixels and draw a rectangle or circle at that particular coordinate?

Or any suggestion on algorithm I can take?


原文:https://stackoverflow.com/questions/23490463
更新时间:2022-06-22 17:06

最满意答案

由于这是搜索错误消息“无法通过...选择实体”的第一场Google比赛,因此我决定尽管主题在几个月前发布,但仍然作出回应。

诀窍是使用JOIN ... WITH ...(如SQL中的JOIN ... ON ...)。

我正在使用此代码的消息:

SELECT ro, COUNT(ro)
FROM FH\MailerBundle\Entity\Recipient r
JOIN r.selectedOption ro
GROUP BY ro.id

我通过下面的代码解决了这个问题:

SELECT ro, COUNT(ro)
FROM FH\MailerBundle\Entity\RecipientOption AS ro
JOIN FH\MailerBundle\Entity\Recipient AS r WITH r.selectedOption = ro
GROUP BY ro.id

我需要为两个实体指定完整的命名空间和类。


I worked around the problem by doing a subselect:

SELECT g
FROM Entity\Group
WHERE g.id IN (
    SELECT DISTINCT g2.id
    FROM Entity\User u
    LEFT JOIN u.group g2
    WHERE u.active = :active
)

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