I'm working on an Image processing project(C++) and I need to write custom metadata to jpeg file after the processing is complete. How can I accomplish this? Is there any library available to do it ?
If you're talking about EXIF Metadata you may want to look at exiv2 which is a C++ library for processing EXIF metadata. There is a second lib which is called libexif and is written in C.
Exiv2 has a view examples on their website and a the API is well documented.
UPDATE: If you want to add custom metadata you could either use the MakerNote or the Comment tag.
Exif Standard: PDF see Section 4.6.5 EXIF IFD Attribute Information Table 7, Tags Relating to User Information.
MakerNote Type Undefined Count Any
Comment Type Undefined Count Any
which means you're allowed to use those 2 tags for any data you want.
Related
Due to a requirement in creating multiple SAS libraries from time to time in the MC, I am trying to figure out how to do this programmatically. These libraries are pointing to external databases. So far, using the available examples I was able to use the following code to create library metadata.
proc metadata in='<AddMetadata>
<Metadata>
<SASLibrary
Name="Test Library"
Desc="This is a test"
Folder="\Shared Data\Test"
Engine="DB2"
IsDBMSLibname="1"
IsHidden="0"
Libref="testlib"
IsPreassigned="0"
PublicType="Library">
</SASLibrary>
</Metadata>
<Reposid>A0000001.A849HGWS</Reposid>
<NS>SAS</NS>
<Flags>268435456</Flags>
<Options/>
</AddMetadata>
';
However this is still missing the resource template, schema name, location (folder name). Is there any way we can add these programmatically as well? Also anyway to update the access templates? Any attributes that I can assign these values to when calling proc metadata? Thanks in advance.
You can use the DATA Step function metadata_newobj("SASLibrary", to programmatically create your libraries. Check the documentation for "METADATA_NEWOBJ Function" for further examples of setting the attributes of the library via rc=metadata_setattr(luri,
Functions are ok but troublesome since you must invoke bunch of them to get desired result. XML as a template works best.
If you have access to SAS Management Console I am recommending enabling Metadata Inspector plugin.
cp -r $SASHOME/SASManagementConsole/9.4/plugins/advanced/omitoolsmc $SASHOME/SASManagementConsole/9.4/plugins/
Then in SASMC you are able to browse metadata of all objects using XML queries. Just go to Tools -> XML Metadata Interface.
Below is example XML fetched using this tool. To place this library in specific folder you need to know folder metadata id (Tree association). Same goes to associating library with a server context (DeployedComponents association) and/or DB2 server.
Of course you need only necessary tags. You can ommit empty ones.
<SASLibrary Name="DB2 Library" Desc="Library description" Engine="DB2" IsDBMSLibname="1" IsHidden="0" IsPreassigned="0" Libref="DB2LIB" PublicType="Library">
<AccessControls/>
<Aliases/>
<AliasFor/>
<Changes/>
<CustomAssociations/>
<DefaultLogin/>
<DeployedComponents>
<ServerContext Id="associated context meta id" />
</DeployedComponents>
<Documents/>
(...)
<Timestamps/>
<Trees>
<Tree Id="folder meta id"/>
</Trees>
<TSObjectNamespace/>
<UsedByPackages/>
<UsedByPrototypes/>
<UsingPackages/>
<UsingPrototype/>
<Variables/>
</SASLibrary>
As the title suggest.
I have searched Google and stackoverflow, so far I don't find any tutorial that doesn't involve (https://github.com/ImperialCollegeLondon/django-drf-filepond).
While this library seems maintain, at 68 stars, too much risk and I prefer to do without it.
What I tried
When you use filepond input tag with class file-uploader file-uploader-grid, in browser, it will compile and generate a div tag.
The issue is that the id in input will be generated under the div instead of input tag.
Without that id, when the form is submitted, self.request.FILES will be empty dictionary.
So I tried writing a JavaScript to add id to input tag, which don't work unfortunately.
Anyone successfully do it in Django without additional library? Thanks
The input generated is only there to catch files, the actual data is either stored in hidden input fields (if you use server property) or encoded in those fields (if you use file encode plugin).
You can set storeAsFile to true to have FilePond update the fileList property of a file field. But that doesn't work on older versions of iOS, see link in property description:
https://pqina.nl/filepond/docs/api/instance/properties/
I can insert the tags on the image. The problem is that every tag that i insert stays with the name "PrivateTag" on LeadTools or the number of the tag on AsTiffTagViewer. Only the name of the tag.
I'm following the example of this guy:
Adding custom tags to a TIFF file
The code is not so different.
Thanks for the help.
TIFF spec states that tags 32768 or higher are "private tags", which means their names vary widely from one organization to another. If the TIFF viewer is not from the same organization that wrote the tag, it will ignore it. Your code defines the tags starting with 65000, which is in the private range. If you're using the LEADTOOLS Tag Editor, it has no way of knowing what you mean by them. If you want a viewer to assign specific names to these tags, write your own TIFF viewer or tag editor. One way to do that is to use the LEADTOOLS imaging SDK.
I'm trying to write a Thumbnail Image Handler for a custom file type based on Microsoft's example code here: Building Thumbnail Handlers.
As a proof of concept, I'm storing the base64 of a jpeg file into an ADS on my custom file.
My problem is that I'm not sure how to access this data from the DLL code. Microsoft's example uses base64 stored in an XML tag within the custom file type. I don't have the option to modify the internal components of my file type, leading me to using ADS as an example.
Is there a way to access an ADS from DLL handler code?
i working on one project. i want to read file which path from url,this file containing xml data i have to show this data in chart format.
Basically, your steps may be these:
Validate the URL data (StructKeyExists + FileExists + isFile).
Read and parse XML file, you can do this with XmlParse.
Convert XML object into the query (see query functions).
Render the data using great charting tags.
If you want more detailed help -- please expand your question, to make it more specific.