github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/gopha/gopha_test.go (about)

     1  // Copyright 2013 Unknown
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License"): you may
     4  // not use this file except in compliance with the License. You may obtain
     5  // a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    11  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    12  // License for the specific language governing permissions and limitations
    13  // under the License.
    14  
    15  // Package gopha is an implementation of Perceptual Hash Algorithm in Go programming language.
    16  package gopha
    17  
    18  import (
    19  	"fmt"
    20  	"image"
    21  	_ "image/gif"
    22  	_ "image/jpeg"
    23  	_ "image/png"
    24  	"os"
    25  	"testing"
    26  )
    27  
    28  func TestPHA(t *testing.T) {
    29  	// Load picture from file.
    30  	infile, err := os.Open("./testdata/pic_output.png")
    31  	if err != nil {
    32  		t.Errorf("Load picture: %s.", err)
    33  	}
    34  
    35  	// Decode picture.
    36  	srcImg, _, err := image.Decode(infile)
    37  	infile.Close()
    38  	if err != nil {
    39  		t.Errorf("Decode picture: %s.", err)
    40  	}
    41  
    42  	fg := PHA(srcImg)
    43  	fmt.Println("Fingerprint:", fg)
    44  
    45  	// Load picture2 from file.
    46  	infile, err = os.Open("./testdata/pic_output2.jpg")
    47  	if err != nil {
    48  		t.Errorf("Load picture2: %s.", err)
    49  	}
    50  
    51  	// Decode picture.
    52  	srcImg, _, err = image.Decode(infile)
    53  	infile.Close()
    54  	if err != nil {
    55  		t.Errorf("Decode picture2: %s.", err)
    56  	}
    57  
    58  	fg2 := PHA(srcImg)
    59  	fmt.Println("Fingerprint:", fg2)
    60  
    61  	fmt.Println("Diff num:", CompareDiff(fg, fg2))
    62  }