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All Journal Telematika Query : Jurnal Sistem Informasi
Fahmi Anwar
Universitas Ahmad Dahlan
Computer Science & IT Control & Systems Engineering Education

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Image Quality Analysis of PNG Images on WhatsApp Messenger Sending Fahmi Anwar; Abdul Fadlil; Imam Riadi
Telematika Vol 14, No 1: February (2021)
Publisher : Universitas Amikom Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35671/telematika.v14i1.1114

Abstract

Technology is growing rapidly, especially in communication with various types of information services such as internet-based messages. One of the most popular internet-based messages in Indonesia is WhatsApp Messenger. WhatsApp is a chat application that can be used on many platforms. Message sending on WhatsApp is carried out end-to-end encryption from the sender to the message recipient. The sending of messages in PNG images is secured using end-to-end encryption and compressed according to predefined rules. This study analyzes Image Compression and Alpha channel in PNG by comparing PNG images before being sent with PNG images that have gone through the sending process on WhatsApp using the test-driven development (TDD) method. The analysis results contain comparisons based on the RMSE, SSIM, PSNR, and MD5 hash values. Delivery with a gallery image attachment type using an image transparent background changes to a white image background. While those with a background other than transparent have good image quality because it has a PSNR value of more than 35 dB, and submissions with document attachment types do not experience changes in MD5 hash value and image quality.
Perancangan Database Point of Sales Apotek Dengan Menerapkan Model Data Relasional Rusydi Umar; Abdul Hadi; Panggah Widiandana; Fahmi Anwar; Muhammad Jundullah; Ahmad Ikrom
Query: Journal of Information Systems VOLUME: 03, NUMBER: 02, OCTOBER 2019
Publisher : Program Studi Sistem Informasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.013 KB)

Abstract

Database design is a process of designing data needed to support various system designs. The benefit of a database in Point of Sales drug sales in the Jogja Pharmacy enables storing, changing and returning all data quickly and easily. Problems in database design are different viewpoints from the designer, programmer and end-user. Because of that, the design is needed a methodology the process of designing a good database starting from procedures, techniques, tools and documentation. The database planning method used in Research and Development (R & D) and the database design method uses the Database Life Cycle (DBLC) variable research is POS pharmacy. Research aspects include requirement analysis, conceptual design, logical design and physical design. The final result of this research is to create 8 types of conceptual consists of drugs, drugs, customers, stores, users, detailed details, and temporary details.Keywords: database, apotek, POS, DBLC, relational data 
Co-Authors Abdul Fadlil Abdul Hadi Ahmad Ikrom Imam Riadi Muhammad Jundullah Panggah Widiandana Rusydi Umar