I am trying to build a custom dataset-loader, which laods ICDAR-Dataset.
My frist step was to embed a dataset inside my loader as suggested also
here in this post, but the problem is that you have to implement all the nice features that the tenfsoflow-2 class "Dataset" offers manually.
My second try was to subclass the Dataset-Class, something like:
class MyDataset(tf.data.Dataset):
def __init__(self):
super(MyDataset, self).init()
def preprocess_images(self):
pass
But the problem is i did not find any documentation what dataset-class internally really does, the only implementation i found was this one.
So question is does anybody know how to build a custom "dataset" in tf2 by subclassing tf.data.Dataset.
By the way i also tried tensorflow_datasets, bit it does not really worked, shince it will downlaod the dataset, and split them manually which is in this is alreay seperated by train and test and also ICDAr can not be downlaoded without registration.
The content of the ICDAR-Dataset is as following:
An Image
A List of all texts in each image
A List of Bouding-boxes for each text in each image
Image:
#https://rrc.cvc.uab.es/?ch=4 owns the copyrights of this image.
Words and bounding boxes for the above image:
377,117,463,117,465,130,378,130,Genaxis Theatre
493,115,519,115,519,131,493,131,[06]
374,155,409,155,409,170,374,170,###
492,151,551,151,551,170,492,170,62-03
376,198,422,198,422,212,376,212,Carpark
494,190,539,189,539,205,494,206,###
374,1,494,0,492,85,372,86,###
Thanks
does anyone know how to
I am trying to use paperclip 3.5.1 with devise 3.1.0 in a Rails 4 application.
I wanted to be able to add an avatar for my User devise model, so I generated the required fields but I have problem in the showing and saving the picture.
I tried the solution given here but when I try to load a url now I get for every controller that I have the following error. It even appears for the RegistrationController.
undefined method `devise_controllers?' for #<__Some__Controller:_____>
Why does this happen and how can I solve it? I couldn't find any solutions online and since it is my first rails application I'm not so familiar with it yet.
This is just a typo: the name of the helper is :devise_controller?, notice the extra "s" you have there: rubydoc reference
I followed this nice article
http://www.lunatech-research.com/playframework-file-upload-blob
and have a perfectly working image upload solution
My questions is, if the user doesn't select any image, how do I assign a default image during save (probably stored in the server)?
if (!user.photo)
user.photo= ?;
user.save();
The one-hack that I can think of is upload the default image and see which UID "Play" stores in the /tmp directory and assign that above. Is there an elegant named* solution to this?
when I say named, I mean I want the code to look like (which means I know what I'm doing and I can also write elegant automated code if there are more than one picture)
user.photo= "images/default/male.jpg"
rather than (which means I'm just hacking and I can't extend it elegantly for a list of pictures)
user.photo= "c0109891-8c9f-4b8e-a533-62341e713a21"
Thanks in advance
The approach I have always taken is to not change the model for empty images, but instead do something in the view to show a default image, if the image does not exist. This I think is a better approach because your are corrupting your model for display purposes, which is bad practice (as you may want to be able to see all those who have not selected an image, for example).
To achieve this, in your view you can simply use the exists() method on the Blob field. The code would look like
#{if user.photo.exists()}
<img src="#{userPhoto(user.id)}">
#{/if}
#{else}
<img src="#{'public/images/defaultUserImage.jpg'}">
#{/else}
I have assumed in the above code that you are rendering the image using the action userPhoto as described in the Lunatech article.
I'd assume you can store the default image somewhere in your applications source folder and use
user.photo.set(new FileInputStream(photo), MimeTypes.getContentType(photo.getName()));
to save the data. Photo is just a File object, so you can get the reference of your default image and use it.
I'm creating a multi-part form in the style that Ryan Bates describes here:
http://railscasts.com/episodes/217-multistep-forms
http://asciicasts.com/episodes/217-multistep-forms (text-based version)
To summarize, I have one view (with a bunch of partials for each form step), and the form variables are stored in a session when the user clicks a next button and a different part of the form is displayed.
One of my form steps allows the user to upload several images via the Paperclip gem. The problem with that is that Rails is trying to upload the image data to the session, which is returning TypeError "can't dump File".
What is a good way to go about this?
UPDATE:
I've tried a bunch of gems (wizardly, acts_as_wizard, and some other smaller ones) but none of them seem to work with Rails 3.
I've also tried just storing the data in an array until the form is complete, but that was causing my controller to get huge and messy.
Saving models into the session is working unless you want to save a File into the session. The wizard plugins are using the session to store models between the steps. They do not produce errors on valid models in my case only on invalids.
So clearing out the attached file sounded a good idea, but in my case clearing out the paperclip attachment with Attachment#clear was not enough because it still wanted to save some File.
I've found out that the problem was with the #queued_for_write attribute in Attachment which still contained the data.
So the following two lines solved my problem:
unless #model.valid?
#model.image.clear
#model.image.queued_for_write.clear
end
This was a paperclip bug and was corrected in this commit.
Until now I was using rc6 and I decided to upgrade, but it's totally
breaking my app ? Maybe I am doing something wrong, but I believe I
followed the documentation.
I have a model Content that embeds_many Localized_Content.
Once I have a content created and wanted to added a localized content
I would do the following:
#content = Content.find('xxx')
#new_content = #content.localized_contants.build()
#new_content.save
This is working perfectly fine under rc6 and updates correctly all the
timestamps in localized_contant (using include Mongoid::Timestamps)
But doing the same thing in rc7 break with the following error:
"Access to the collection for LocalizedContent is not allowed since it
is an embedded document, please access a collection from the root
document."
Ok, maybe I need to save directly from the parent content then ok.
Doing a
#content.save
works but will not trigger all the timestamping
and this breaks the logic of my apps... what should I do ?
#content.save is the way to go. You should refactor your code to call save() on the parent object instead of the embedded document.