Baillehache Pascal's personal website The latest articles published on Baillehache Pascal's personal website https://baillehachepascal.dev/index.php 2021 Baillehache Pascal All rights reserved Photometric stereo for defect detection https://baillehachepascal.dev/2026/photometric_stereo.php https://baillehachepascal.dev/2026/photometric_stereo.php?20260220 Fri, 27 February 2026 17:00:01 +0900 This article is about a technique called photometric stereo used to estimate an object's surface normal vectors from pictures, and an alternative technique useful in the context of defect detection. Coders, resist LLMs! https://baillehachepascal.dev/2026/resist_llms.php https://baillehachepascal.dev/2026/resist_llms.php?20260215 Thu, 15 February 2026 00:00:01 +0900 I share here my reply to someone in the ClimateAction.tech community who worried about how many job listings are now explicitly requiring for use of AI coding tools while he doesn't want to use them for ethical and environmental reasons. Serving data through copy paste in C using X11 https://baillehachepascal.dev/2026/copy_paste_in_c_x11.php https://baillehachepascal.dev/2026/copy_paste_in_c_x11?20260122 Thu, 22 January 2026 22:00:01 +0900 Article explaining how serve data through the copy/paste mechanism from a C program using X11. Checking for quantity unit at compilation time in C https://baillehachepascal.dev/2026/unit_quantity.php https://baillehachepascal.dev/2026/unit_quantity?20260119 Mon, 19 January 2026 22:00:01 +0900 Conceptual description of a method to check for data validity at unit (in the sense of unit of measurement) level at compile time in C code. Focus measurement in digital photography https://baillehachepascal.dev/2026/focus_measurement.php https://baillehachepascal.dev/2026/focus_measurement?20260118 Sun, 18 January 2026 19:00:01 +0900 A study of different metric for measurement of focus in digital photography. A Gantt chart app as a single PHP file https://baillehachepascal.dev/2023/gantty.php https://baillehachepascal.dev/2023/gantty.php?20231114 Sat, 14 Nov 2023 00:00:01 +0900 Tue, 06 Jan 2026 00:00:01 +0900 Article explaining how to build a Gantt chart app as a single PHP file. Numerical instabilities https://baillehachepascal.dev/2025/numerical_instabilities.php https://baillehachepascal.dev/2025/numerical_instabilities.php?20251004 Sat, 4 Oct 2025 00:00:01 +0900 A meme about numerical instabilities. Update Fedora on a linode instance https://baillehachepascal.dev/2025/upgrading_fedora_linode.php https://baillehachepascal.dev/2025/upgrading_fedora_linode.php?20250820 Wed, 20 Aug 2025 00:00:01 +0900 A guide about how to update a linode instance running Fedora to a newer version.