ImgHashBase (OpenCV 3.4.20 Java documentation)

java.lang.Object
- org.opencv.core.Algorithm
- - org.opencv.img_hash.ImgHashBase

Direct Known Subclasses:

AverageHash, BlockMeanHash, ColorMomentHash, MarrHildrethHash, PHash, RadialVarianceHash
```
public class ImgHashBase
extends Algorithm
```
The base class for image hash algorithms

Field Summary
- Fields inherited from class org.opencv.core.Algorithm
  nativeObj

Constructor Summary

Constructors
Modifier Constructor Description

protected ImgHashBase(long addr)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static ImgHashBase`	`__fromPtr__(long addr)`
`double`	`compare(Mat hashOne, Mat hashTwo)`	Compare the hash value between inOne and inTwo
`void`	`compute(Mat inputArr, Mat outputArr)`	Computes hash of the input image
`protected void`	`finalize()`

Methods inherited from class org.opencv.core.Algorithm
clear, empty, getDefaultName, getNativeObjAddr, save

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ImgHashBase
```
protected ImgHashBase(long addr)
```
- Method Detail
  - __fromPtr__
```
public static ImgHashBase __fromPtr__(long addr)
```
  - compute
```
public void compute(Mat inputArr,
                    Mat outputArr)
```
    Computes hash of the input image
    
    Parameters:
    
    inputArr - input image want to compute hash value
    
    outputArr - hash of the image
  - compare
```
public double compare(Mat hashOne,
                      Mat hashTwo)
```
    Compare the hash value between inOne and inTwo
    
    Parameters:
    
    hashOne - Hash value one
    
    hashTwo - Hash value two
    
    Returns:
    
    value indicate similarity between inOne and inTwo, the meaning of the value vary from algorithms to algorithms
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    Overrides:
    
    finalize in class Algorithm
    
    Throws:
    
    java.lang.Throwable