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Methods and systems for transmitting an image with thumbnail data

專利號
US11178079B1
公開日期
2021-11-16
申請人
WhatsApp Inc.（US CA Menlo Park）
發(fā)明人
Aaron Patel; Jonathan Sheller
IPC分類
H04L12/58; H04L29/08; H04L9/06
技術領域
image,thumbnail,may,data,client,quality,messaging,in,or,blob
地域： CA CA Menlo Park

摘要

Exemplary embodiments relate to techniques for improving the speed and rendering quality of an image (e.g., a JPEG), particularly in an end-to-end encrypted environment. The image may be analyzed on the sending-client side and the image data may be broken into a thumbnail and a full-quality image, where the full-quality image data relies on the thumbnail data to render a high-quality image. The image is uploaded to a blob store, and a message is sent to the receiving client with image information. At the recipient side, the JPEG image data is retrieved from the blob store and the thumbnail is first rendered. Subsequently, as the remainder of the image data is received at the receiving client, the image is updated. Consequently, images are rendered faster, and the thumbnail can be automatically downloaded so that a user can determine if they wish to download the full image.

說明書

Because the image data is already resident at the blob store, and because the various scans and image qualities have already been processed and the HMACs calculated over the relevant chunks, it is not necessary to perform his processing again (assuming that the receiving client still has a copy of the relevant data lengths and HMACs from the original sending client).

Accordingly, at block 696 the system generates a new image message for the second receiving client, which includes the data/scan lengths from the original sender and the HMACs from the original sender. The reference to the image from the original sender may also be included in the new image message.

The new image message may be forwarded to the second recipient at block 698. Accordingly, the second recipient can use the information in the new image message to download the image from the blob store in the same manner as was done at the first recipient.

Embodiment for Providing Multiple Scans

FIGS. 7, 8A, and 8B supplement the procedures shown in FIGS. 5, 6A, and 6B in order to provide a system that generates intermediate image qualities between the thumbnail quality and the full image quality.

權利要求

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