数据库设计，用于存储图像颜色模式，用于搜索图像颜色 [英] Database design to store image color pattern in MySQL for searching Image by color

问题描述

我正在使用PHP和MySQL构建一个图像厨房，我想通过颜色实现图像搜索。通过遵循 Imagick :: getImageHistogram ，我得到了最多的图像颜色。

 <？php 
 $ image = new Imagick（thing.png）; 
 $ pixels = $ image-> getImageHistogram（）; 
 foreach（$ pixels as $ p）{
 $ colors = $ p-> getColor（）; 
 foreach（$ colors as $ c）{
 print（$ c\t）; 
} 
 print（\t：\t。$ p-> getColorCount（）。\\\
）; 
} 
？> 
 
这将打印出如下：
 
红色绿色蓝色Alpha：没有出现
 252 250 252 1：125 
 194 156 182 1 ：126 
 109 18 79 1：11440 
 2 117 162 1：12761 
 255 255 255 1：40769 
  

尽管我已经完成了颜色，但我坚持设计数据库以将颜色信息和图像路径存储在数据库中。

我的问题是如何设计数据库（表结构）来存储这种数据，搜索可以查询可以有效地应用。

更新：

其次，如何获取匹配颜色的图像。假设用户正在搜索一个颜色＃ff0000，那么如何从数据库中获取所有最近匹配的图像。

谢谢

解决方案

你应该规范化这个。

3表：

  Image {image_id，name} 
颜色{color_id，red，green，blue，alpha} 
 ImageHasColor {image_id，color_id，number_of_times_appeared} 
  

插入数据应该很简单，使用 ... insert_id

选择与以下连接：

  SELECT * FROM 
 Image i 
 JOIN ImageHasColors h 
 ON i.image_id = h.image_id 
 JOIN Colors c 
 ON c.color_id = h.color_id 
 ORDER BY i.image_id 
  

查看有关如何转换HEX的此链接颜色到RGB值： http://bavotasan.com/2011 / convert-hex-color-to-rgb-using-php /

搜索前10个真正的红色图片：

  SELECT * FROM 
 Image i 
 JOIN ImageHasColors h 
 ON i.image_id = h.image_id 
 JOIN颜色c 
 ON c.color_id = h.color_id 
 WHERE c.red> 200 
 AND c.green< 50 
 AND c。绿色50 
 ORDER BY h.number_of_times_appeared 
 LIMIT 10 
  

搜索相当黑色的图片：

  SELECT * FROM 
 Image i 
 JOIN ImageHasColors h 
 ON i.image_id = h .image_id 
 JOIN颜色c 
 ON c.color_id = h.color_id 
 WHERE c.red< 30 
 AND c.green< 30 
 AND c。绿色30 
 ORDER BY h.number_of_times_appeared 
 LIMIT 10 
  

I am building a image galley using PHP and MySQL where I want to implement Image search by it's color. By following Imagick::getImageHistogram i got the most presented colors from the images.

<?php
$image = new Imagick("thing.png");
$pixels=$image->getImageHistogram();
foreach($pixels as $p){
 $colors = $p->getColor();
 foreach($colors as $c){
        print( "$c\t" );
 }
 print( "\t:\t" . $p->getColorCount() . "\n" );
}
?>

This will print out something like:

Red    Green    Blue       Alpha    :    No of times appeared
252    250      252        1        :       125
194    156      182        1        :       126
109    18       79         1        :       11440
2      117      162        1        :       12761
255    255      255        1        :       40769

Although I am done with getting the colors, I am stuck with designing the database to store the color information along with image path in the database.

My question is how to design a database (table structure) to store this kind of data where search can query can be applied in an effective manner.

Update:

Secondly how can I get the images with a matching color. Let's say user is searching for a color #ff0000, then how can I get all the nearest matched images from the database.

Thank You

解决方案

You should normalize this.

3 Tables:

Image {image_id, name}
Colors {color_id, red, green, blue, alpha}
ImageHasColor {image_id, color_id, number_of_times_appeared}

Inserting data should be simple, use ...insert_id functions to get the id from the row you just inserted.

Select with joins like:

SELECT * FROM
Image i
JOIN ImageHasColors h
ON i.image_id = h.image_id
JOIN Colors c
ON c.color_id = h.color_id
ORDER BY i.image_id

Check this link on how to convert HEX color to RGB values: http://bavotasan.com/2011/convert-hex-color-to-rgb-using-php/

Search top 10 really red pictures:

SELECT * FROM
Image i
JOIN ImageHasColors h
ON i.image_id = h.image_id
JOIN Colors c
ON c.color_id = h.color_id
WHERE c.red > 200
AND   c.green < 50
AND   c. green < 50
ORDER BY h.number_of_times_appeared
LIMIT 10

Search rather black pictures:

SELECT * FROM
Image i
JOIN ImageHasColors h
ON i.image_id = h.image_id
JOIN Colors c
ON c.color_id = h.color_id
WHERE c.red < 30
AND   c.green < 30
AND   c. green < 30
ORDER BY h.number_of_times_appeared
LIMIT 10

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