Implement Custom Image Decoder

Question

Implement Custom Image Decoder

Alessio Camaroto 81

I need to implement a custom image decoder like a qr code decoder. I put a camera control in my app and I want to decode in real time the current image.
I don't know exactly how can I explain it better, I generate an image with an encoded content (image attached) and I want to decode it and re-obtain the original content. The attached image corresponds to the number 1, I need to recognize the image content and correlate it to number 1.

== 1

Thanks
Alessio

JarvanZhang 23,971 Reputation points

2022-01-05T08:33:34.563+00:00
Hi, AlessioCamaroto-0796. What content do you want to generate from the image? If it's the base64 string, you could create a bitmap using the string and display the bitmap.

var byteArray = Convert.FromBase64String(base64text); Stream stream = new MemoryStream(byteArray); var bitmap = BitmapFactory.DecodeStream(stream); imageView.SetImageBitmap(bitmap);

If it's a value like 'number 1', you need to store the value and image. Then query the identifier to get the image.
Alessio Camaroto 81 Reputation points

2022-01-05T09:16:43.62+00:00

Hi JarvanZhang-MSFT, bitmap content is a number but with a different symbology: number 1 is equal to . I can generate bitmap from a number but I can't do the process back (from bitmap to re-obtain the number). I need something like a 'qr code decoder' to analyze in real time an image (from camera) and "understand" which is the correlated number. I have a dataset of 10000 images (from number 0 to 9999) to use to compare, in some way, with current image.

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JarvanZhang 23,971 Reputation points

2022-01-05T08:33:34.563+00:00

Hi, AlessioCamaroto-0796. What content do you want to generate from the image? If it's the base64 string, you could create a bitmap using the string and display the bitmap.

var byteArray = Convert.FromBase64String(base64text); Stream stream = new MemoryStream(byteArray); var bitmap = BitmapFactory.DecodeStream(stream); imageView.SetImageBitmap(bitmap);

If it's a value like 'number 1', you need to store the value and image. Then query the identifier to get the image.
Alessio Camaroto 81 Reputation points

2022-01-05T09:16:43.62+00:00

Hi JarvanZhang-MSFT, bitmap content is a number but with a different symbology: number 1 is equal to . I can generate bitmap from a number but I can't do the process back (from bitmap to re-obtain the number). I need something like a 'qr code decoder' to analyze in real time an image (from camera) and "understand" which is the correlated number. I have a dataset of 10000 images (from number 0 to 9999) to use to compare, in some way, with current image.

Answer 1

JarvanZhang 23,971

I can generate bitmap from a number but I can't do the process back (from bitmap to re-obtain the number).

You could store the bitmap and identifier string as a key-value pair. Or create a custom bitmap

I need something like a 'qr code decoder' to analyze in real time an image (from camera) and "understand" which is the correlated number.

For the qr code, you could try using ZXing package to analyze the image. You need to customize these qr code images first.

Alessio Camaroto 81 Reputation points

2022-01-06T10:08:27.417+00:00

You could store the bitmap and identifier string as a key-value pair. Or create a custom bitmap

I just do it, I put some information in bitmap metadata but I cannot use it during real time processing

For the qr code, you could try using ZXing package to analyze the image. You need to customize these qr code images first.

I don't want to generate a custom qr code image, I would like to implement a new kind of code (and a new kind of ZXing decoder)....if it is possible.
JarvanZhang 23,971 Reputation points

2022-01-07T06:27:27.263+00:00

I don't want to generate a custom qr code image

Do you mean identifying the image at runtime, then generate an identifier and store the value? If so, you may need to seek for a specify SDK tool. Android doesn't provide an related API.
Alessio Camaroto 81 Reputation points

2022-01-07T09:04:29.69+00:00

Yes, I mean identify the image at runtime (and the related integer value). Any SDK idea ?
JarvanZhang 23,971 Reputation points

2022-01-07T09:53:44.98+00:00

Sorry, we cannot provide the third-party library because of the policy. You could search about AI SDK that supports mobile application.

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Implement Custom Image Decoder

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