Question

我遇到了从图像中获取额外调整大小的图像的问题。我正在使用django-cropper 0.1。最初为裁剪图像建模的部分代码如下：

class Cropped(models.Model):
    def __unicode__(self):
        return u'%s-%sx%s' % (self.original, self.w, self.h)

    def upload_image(self, filename):
        return '%s/crop-%s' % (settings.ROOT, filename)

    def save(self, *args, **kwargs): #force_insert=False, force_update=False, using=None):
        source = self.original.image.path
        target = self.upload_image(os.path.basename(source))

        Image.open(source).crop([
            self.x,             # Left
            self.y,             # Top
            self.x + self.w,    # Right
            self.y + self.h     # Bottom
        ]).save(django_settings.MEDIA_ROOT + os.sep + target)


        self.image = target        
        super(Cropped, self).save(*args, **kwargs)

但是我希望从裁剪后的图像中获得额外的调整大小的图像，所以我稍微更改了代码，现在它看起来像：

class Cropped(models.Model):
    def __unicode__(self):
        return u'%s-%sx%s' % (self.original, self.w, self.h)

    def _get_average_path(self):
        return _add_average(self.path)
    average_path = property(_get_average_path)

    def _get_average_url(self):
        return _add_average(self.url)
    average_url = property(_get_average_url)

    def _get_large_path(self):
        return _add_large(self.path)
    large_path = property(_get_large_path)

    def _get_large_url(self):
        return _add_large(self.url)
    large_url = property(_get_large_url)

    def upload_image(self, filename):
        return '%s/crop-%s' % (settings.ROOT, filename)

    def save(self, *args, **kwargs): #force_insert=False, force_update=False, using=None):
        source = self.original.image.path
        target = self.upload_image(os.path.basename(source))

        img = Image.open(source).crop([
            self.x,             # Left
            self.y,             # Top
            self.x + self.w,    # Right
            self.y + self.h     # Bottom
        ]).save(django_settings.MEDIA_ROOT + os.sep + target)

        self.image = target        
        super(Cropped, self).save(*args, **kwargs)
        img = Image.open(self.image.path)
        img = img.resize((180, 180), Image.ANTIALIAS)
        img.save(self.large_path, 'JPEG')

        img = img.resize((104, 104), Image.ANTIALIAS)
        img.save(self.average_path, 'JPEG')

但它仍在做基本工作。有人可以帮助我，并提出我应该在此代码中修复的内容的任何建议吗？

Answer 1

我回答我自己的问题，因为我找到了解决方案，也许是某人。也许它现在是最好的解决方案，但它确实有效。首先，需要为额外的，已调整大小的图像添加其他字段：

average = models.ImageField(
    blank=True, null=True,
    verbose_name = _('Image'),
    upload_to    = upload_image,
    editable     = False,
)

然后需要将save（）方法变为这样的东西：

 def save(self, *args, **kwargs): #force_insert=False, force_update=False, using=None):
        source = self.original.image.path
        target = self.upload_image(os.path.basename(source))

        Image.open(source).crop([
            self.x,             # Left
            self.y,             # Top
            self.x + self.w,    # Right
            self.y + self.h     # Bottom
        ]).save(django_settings.MEDIA_ROOT + os.sep + target)
        self.image = target

        splited_target = target.split("/")
        avepath = "/average-".join(splited_target) 
        self.average = avepath

        Image.open(self.image).resize((104, 104), Image.ANTIALIAS).save(django_settings.MEDIA_ROOT + avepath, 'JPEG')
        super(Cropped, self).save(*args, **kwargs)

就是这样。

Django裁剪器 - 从裁剪后的图像中获取额外的大小调整图像

1 个答案: