github.com/dreamCodeMan/smartcrop@v0.2.0/smartcrop_test.go (about)

     1  /*
     2   * Copyright (c) 2014-2017 Christian Muehlhaeuser
     3   *
     4   * Permission is hereby granted, free of charge, to any person obtaining a copy
     5   * of this software and associated documentation files (the "Software"), to deal
     6   * in the Software without restriction, including without limitation the rights
     7   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   * copies of the Software, and to permit persons to whom the Software is
     9   * furnished to do so, subject to the following conditions:
    10   *
    11   * The above copyright notice and this permission notice shall be included in all
    12   * copies or substantial portions of the Software.
    13   *
    14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   * SOFTWARE.
    21   *
    22   *	Authors:
    23   *		Christian Muehlhaeuser <muesli@gmail.com>
    24   *		Michael Wendland <michael@michiwend.com>
    25   */
    26  
    27  package smartcrop
    28  
    29  import (
    30  	"errors"
    31  	"fmt"
    32  	"image"
    33  	_ "image/jpeg"
    34  	_ "image/png"
    35  	"io/ioutil"
    36  	"os"
    37  	"strings"
    38  	"testing"
    39  )
    40  
    41  var (
    42  	testFile = "./examples/gopher.jpg"
    43  )
    44  
    45  type SubImager interface {
    46  	SubImage(r image.Rectangle) image.Image
    47  }
    48  
    49  func TestCrop(t *testing.T) {
    50  	fi, _ := os.Open(testFile)
    51  	defer fi.Close()
    52  
    53  	img, _, err := image.Decode(fi)
    54  	if err != nil {
    55  		t.Fatal(err)
    56  	}
    57  
    58  	topCrop, err := SmartCrop(img, 250, 250)
    59  	if err != nil {
    60  		t.Fatal(err)
    61  	}
    62  	expected := image.Rect(464, 24, 719, 279)
    63  	if topCrop != expected {
    64  		t.Fatalf("expected %v, got %v", expected, topCrop)
    65  	}
    66  
    67  	sub, ok := img.(SubImager)
    68  	if ok {
    69  		cropImage := sub.SubImage(topCrop)
    70  		// cropImage := sub.SubImage(image.Rect(topCrop.X, topCrop.Y, topCrop.Width+topCrop.X, topCrop.Height+topCrop.Y))
    71  		writeImage("jpeg", cropImage, "./smartcrop.jpg")
    72  	} else {
    73  		t.Error(errors.New("No SubImage support"))
    74  	}
    75  }
    76  
    77  func BenchmarkCrop(b *testing.B) {
    78  	fi, err := os.Open(testFile)
    79  	if err != nil {
    80  		b.Fatal(err)
    81  	}
    82  	defer fi.Close()
    83  
    84  	img, _, err := image.Decode(fi)
    85  	if err != nil {
    86  		b.Fatal(err)
    87  	}
    88  
    89  	b.ResetTimer()
    90  	for i := 0; i < b.N; i++ {
    91  		if _, err := SmartCrop(img, 250, 250); err != nil {
    92  			b.Error(err)
    93  		}
    94  	}
    95  }
    96  
    97  func BenchmarkEdge(b *testing.B) {
    98  	fi, err := os.Open(testFile)
    99  	if err != nil {
   100  		b.Fatal(err)
   101  	}
   102  	defer fi.Close()
   103  
   104  	img, _, err := image.Decode(fi)
   105  	if err != nil {
   106  		b.Fatal(err)
   107  	}
   108  
   109  	rgbaImg := toRGBA(img)
   110  	b.ResetTimer()
   111  	for i := 0; i < b.N; i++ {
   112  		o := image.NewRGBA(img.Bounds())
   113  		edgeDetect(rgbaImg, o)
   114  	}
   115  }
   116  
   117  func BenchmarkImageDir(b *testing.B) {
   118  	files, err := ioutil.ReadDir("./examples")
   119  	if err != nil {
   120  		b.Fatal(err)
   121  	}
   122  
   123  	b.ResetTimer()
   124  	for _, file := range files {
   125  		if strings.Contains(file.Name(), ".jpg") {
   126  			fi, _ := os.Open("./examples/" + file.Name())
   127  			defer fi.Close()
   128  
   129  			img, _, err := image.Decode(fi)
   130  			if err != nil {
   131  				b.Error(err)
   132  				continue
   133  			}
   134  
   135  			topCrop, err := SmartCrop(img, 220, 220)
   136  			if err != nil {
   137  				b.Error(err)
   138  				continue
   139  			}
   140  			fmt.Printf("Top crop: %+v\n", topCrop)
   141  
   142  			sub, ok := img.(SubImager)
   143  			if ok {
   144  				cropImage := sub.SubImage(topCrop)
   145  				// cropImage := sub.SubImage(image.Rect(topCrop.X, topCrop.Y, topCrop.Width+topCrop.X, topCrop.Height+topCrop.Y))
   146  				writeImage("jpeg", cropImage, "/tmp/smartcrop/smartcrop-"+file.Name())
   147  			} else {
   148  				b.Error(errors.New("No SubImage support"))
   149  			}
   150  		}
   151  	}
   152  	// fmt.Println("average time/image:", b.t)
   153  }