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Hi,

First of all, I really enjoying  the Embedded Wizard Studio.

I have one fingerprint sensor which gives me data(image of finger) of my finger in one buffer. I want to update that live image at screen.

That image should be update as data send by the sensor. Means sensor sends me images till finger image matches with data base images. So i want to update that live images(which send by sensor) continuously on screen like a small video.

Thanks,
Chand Bhadaniya

1 Answer

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by

Hi Chand Bhadaniya,

first of all, thank you for the feedback! :-)

Of course, you can load images dynamically during runtime from some external source like a fingerprint sensor. For that purpose, the Extern Bitmap Interface is the right solution. By using this interface you can adapt your own image decoder / image loader which gets the content from your fingerprint sensor / decoder.

Please have a look to the corresponding documentation - there you will find an example using the libJPEG decoder. You can replace the JPEG decoder with your image provider.

Alternatively, if you want to show images continuously (like a camera image / video), you can use the Views::Applet class. Let me refer to the article Embedded Wizard with camera for more details.

Best regards,

Manfred

by
Hi Manfred,

 

I go through your suggestion. But i still have douts.

1. Where to define EwExternBitmap() function. like in C files or in Embedded wizard studio. in which function or method?

2. What to pass in aName when i have one ( uint8_t image[25268] ) 8 bit integer array data as image.

 

If possible plese lead me through example.

 

Thanks,

Chand Bhadaniya
by

Hello,

the function EwLoadExternBitmap() has to be implemented within your C code - not within Embedded Wizard Studio. Please have a look to the JPEG decoder example that you will find within the corresponding documentation

The name is just to provide your decoder some information (in case of JPEG it is the file name) - it is up to you.

Btw: You will find another example of ExternBitmap with the set of examples installed with Embedded Wizard.

I hope this helps...

Best regards,

Manfred.

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