Browse Prior Art Database

A method to send image attachments to mobile devices

IP.com Disclosure Number: IPCOM000126257D
Original Publication Date: 2005-Jul-11
Included in the Prior Art Database: 2005-Jul-11
Document File: 1 page(s) / 24K

Publishing Venue

IBM

Abstract

Usually images larger than a predefined size sent to mobile devices via email are dropped by the carrier. This invention suggests that images be scaled down to appropriate sizes (by changing resolution and number of colors) before sending them to the mobile devices. The obvious advantage of this method is completeness of information being transmitted. The key requirement here is for the carrier to know the constraints on the device, so it can decide on the image scaling factor. This can be done with slight modifications to the connection establishment protocol. When the carrier sends the "incoming call" message to the device, it also adds information about the sizeof the incoming email. The device adds information regarding the supported color depth, space constraints etc. in the acknowledgement message. The user can configure the device to limit the size of the attachments, color depth etc. The device will communicate this information to the server during connection setup as explained above.

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A method to send image attachments to mobile devices

Assume that John sits in front of a PC, takes a picture of himself with his 2 megapixel camera at resolution 1600x1200. Then he decides to email the picture to Mary to her mobile phone using GSM technology as an example. Currently, the GSM provider receives the email, checks the size of the email, and drops it, because the customer's phone will not accept a 1 MB attachment. Thus Mary receives a message, which states: "text only, attachment removed".

Using this method: John sends a 1600x1200 pixel message of 1MB in size, the provider detects that there is an image embedded in the email, extracts the image, detects the image format (jpeg, tiff, gif, etc.), scales it down to the resolution, number of colors, and memory constraints appropriate to the model of the recipient's device, and sends the message with the original text but a much smaller image.

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