Image resizing

[akash...@ranosys.com]

Hi..
can anyone please tell me how to resize the uploaded image....
This is my model
class User(models.Model):
    first_name=models.CharField(

verbose_name = "First Name *",max_length=20,blank=False)
    last_name=models.CharField(verbose_name = "Last Name *",max_length=20,blank=False)
    username=models.EmailField(verbose_name = "Email *",max_length=30,blank=False)
    password=models.CharField(verbose_name = "Password *",max_length=15,blank=False)
    dob=models.DateField(verbose_name = "DOB *" ,blank=True,null=True)
    mobileno=models.CharField(verbose_name = "Mobile No *",max_length=20,blank=False)
    houseno=models.CharField(verbose_name = "House No",max_length=10,blank=True)
    address1=models.CharField(verbose_name = "Adress1",max_length=30,blank=True)
    city=models.CharField(verbose_name = "City",max_length=20,blank=True)
    state=models.CharField(verbose_name = "State",max_length=30,blank=True)
    pincode=models.CharField(verbose_name = "Pincode",max_length=20,blank=True)
    country=models.CharField(verbose_name = "Country",max_length=30,blank=True)
    comment=models.CharField(verbose_name = "Comment",max_length=200,blank=True)
    sex=models.CharField(verbose_name = "Sex *",max_length=5,blank=False)
    image=models.FileField(verbose_name = "Image(limit 1Mb) *",blank=True,upload_to='media/')
   
    def __unicode__(self):
        return self.first_name


this is my form
class Registration(forms.ModelForm):
      password = forms.CharField(label='Password *',widget=forms.PasswordInput())
      image = forms.ImageField(label='Select a file *',help_text='max. 1 megabytes')
      class Meta:

view.py
def registration(request):
    #request.session.set_test_cookie()
    if request.method == "POST":
            regform=Registration(request.POST,request.FILES)
            if regform.is_valid():
               #item=resize_and_crop(img_path, modified_path, size, crop_type='top')
               regform.save();
               return HttpResponseRedirect('/login/')
               
            else:
                return render_to_response('registration.html',{"form":regform})
    else:
        regform=Registration()
    return render_to_response('registration.html',{"form":regform})


def show_profile(request):
    if 'username' in request.session:
         obj_user=User.objects.all().order_by('-id')
         return render_to_response("index.html",{"obj_user":obj_user,"message":"Hello World"})
    else:
        return HttpResponseRedirect('/login/')

[Andreas Kuhne]

Hi, 

Check out the easy_thumbnails plugin. http://easy-thumbnails.readthedocs.org/en/2.1/

It automatically resizes all images to the size you want if you use it correctly.

Regards,

Andréas

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[Akash Patni]

can you please suggest me another answer...

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Best Regards,

Akash Patni

Software Engineer

Head Office:  Oxley Bizhub, #06-48 | 73 Ubi Road 1 | Singapore - 408733 Tel: +65 66331556  |  HP: +65 98573420 Global Offices: San Francisco, USA | Jaipur, India | Bikaner, India

[Andreas Kuhne]

You can use Pillow to change the size of the images yourself. That is however pretty complicated and IMO not really worth the effort. I would go with easy_thumbnails.

Regards,

Andréas

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[Akash Patni]

For image resizing i have used the following function(in bold).Is it right??

def edit_profile(request):  

    if 'username' in request.session:

        #user_id=request.POST.get('id')

        user_id=request.GET.get('id')

        usr_obj=User.objects.get(id=int(user_id))

        if request.method=="POST":

                if(request.POST['houseno']!=''):

                          houseno=request.POST['houseno']

                else:

                          houseno=None

                if(request.POST['address1']!=''):

                          address1=request.POST['address1']

                else:

                          address1=None

                if(request.POST['city']!=''):

                          city=request.POST['city']

                else:

                          city=None

                if(request.POST['state']!=''):

                          state=request.POST['state']

                else:

                          state=None

                if(request.POST['pincode']!=''):

                          pincode=request.POST['pincode']

                else:

                          pincode=None

                if(request.POST['country']!=''):

                          country=request.POST['country']

                else:

                          country=None

                if(request.POST['comment']!=''):

                          comment=request.POST['comment']

                else:

                          comment=None 

                regform=Edit_Registration(instance=usr_obj,data=request.POST)

                

                if regform.is_valid():

                    try:

                        from PIL import Image, ImageOps

                    except ImportError:

                        import Image

                        import ImageOps

                    imagecontent=request.FILES['image']---At this point it is giving MultiValueDicitionayKeyError(though the field name is same that is image)

                    if imagecontent.mode not in ("L", "RGB"):

                        image = imagecontent.convert("RGB")

                        imageresize = image.resize((100,100), Image.ANTIALIAS) 

                        imageresize.save( 'JPEG', quality=75)

                        regform.save();

                        return HttpResponseRedirect('/index/')

                else:

                    return render_to_response("edit_profile.html",{"form":regform,})

        else:       

           

    

            regform=Edit_Registration(instance=usr_obj)

            return render_to_response("edit_profile.html",{"form":regform,"user_id":user_id})

    else:

        return HttpResponseRedirect('/login/') 

Please Suggest..........

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[Andreas Kuhne]

Hi,

Again, you should really put this in your database model instead of in the view. If you use your overriden save function, you would be able to add this there. Also, you check if the image is not an L or RGB image (don't know what L is) and resize it ONLY if it is on of them.

Regards,

Andréas

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[Akash Patni]

if regform.is_valid():

                    image_file = StringIO.StringIO(request.FILES['image'].read())

                    image = Image.open(image_file)

                    imageresize = image.resize((100,100), Image.ANTIALIAS) 

                    imageresize.save( 'abc.JPEG', quality=75)

                    regform.save();

                    return HttpResponseRedirect('/index/')

                else:

                    regform=Edit_Registration(instance=usr_obj)

                    return render_to_response("edit_profile.html",{"form":regform,})

        else:       

            #user_id=request.GET.get('id')

            #usr_obj=User.objects.get(id=int(user_id))

     #temp_data={'first_name':user_id.first_name,'last_name':user_id.last_name,'email':user_id.email,'password':user_id.password,'dob':user_id.dob,'mobileno':user_id.mobileno,'houseno':user_id.houseno,'address1':user_id.address1,'city':user_id.city,'state':user_id.state,'pincode':user_id.pincode,'country':user_id.country,'comment':user_id.comment,'sex':user_id.sex}

            regform=Edit_Registration(instance=usr_obj)

            return render_to_response("edit_profile.html",{"form":regform,"user_id":user_id})

    else:

        return HttpResponseRedirect('/login/') 

Hey ,

I am using the above method and able to resize the image but it is only taking JPEG format and i want other format also. Can u please suggest

imageresize.save( 'abc.JPEG', quality=75) it can take three parameters..name, format and quality

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[Akash Patni]

Hi,

Resizing is now working properly but the issue is that it is giving key error.

it is taking all files for eg(images.bmp,xx.jpeg) but is giving error when i am tryint to upload the file  (luzern-bridge-8q4_small.jpg) In short it is giving error for jpg format. Please suggest

def edit_profile(request):  

#     data = Thumbnail.objects.get(pk=id)    

    if 'username' in request.session:

        #user_id=request.POST.get('id')

        user_id=request.GET.get('id')

        usr_obj=User.objects.get(id=int(user_id))

        if request.method=="POST":

                regform=Edit_Registration(instance=usr_obj,data=request.POST)

                

                if regform.is_valid():

                     image_file = StringIO.StringIO(request.FILES['image'].read())

                     imagename=request.FILES['image'].name

                     ext = imagename.split('.')[-1]

                     

                     image = Image.open(image_file)

                     imageresize = image.resize((100,100), Image.ANTIALIAS) 

                     filename = hashlib.md5(image_file.getvalue()).hexdigest()+'.'+ext

                     imageresize.save("/home/ranosys-akash/workspace/mysite/src/media/"+filename, ext, quality=75)

                     error at above line(key error...u'JPG')

                     usr_obj.image=filename

                     regform.save();

                     return HttpResponseRedirect('/index/')

                else:

                     regform=Edit_Registration(instance=usr_obj)

                     return render_to_response("edit_profile.html",{"form":regform,})

        else:       

            #user_id=request.GET.get('id')

            #usr_obj=User.objects.get(id=int(user_id))

     #temp_data={'first_name':user_id.first_name,'last_name':user_id.last_name,'email':user_id.email,'password':user_id.password,'dob':user_id.dob,'mobileno':user_id.mobileno,'houseno':user_id.houseno,'address1':user_id.address1,'city':user_id.city,'state':user_id.state,'pincode':user_id.pincode,'country':user_id.country,'comment':user_id.comment,'sex':user_id.sex}

            regform=Edit_Registration(instance=usr_obj)

            return render_to_response("edit_profile.html",{"form":regform,"user_id":user_id})

    else:

        return HttpResponseRedirect('/login/')