![]() SparkFun has made available a new interesting development kit that allows you to get your hands on a FLIR Lepton thermal imaging sensor along with a breakout board specially developed for it in a single package that you can order. There are alternative ways in which you can get the Lepton thermal sensor such as a group buy or by purchasing a complete FLIR ONE Thermal Imaging Accessory for iPhone 5 and iPhone 5S and disassembling it to take out the sensor from it. Exact specifications should be obtained from the product data sheet. But you also need to get the breakout board fr the sensor developed by Pure Engineering as well. GroupGets LLC PURETHERMAL-2 Image shown is a representation only. Was: MicroView - OLED Arduino Module - SparkFun DEV-12923 The MicroView is the first chip-sized Arduino compatible module that lets you see what your Arduino is. Lepton contains a breakthrough lens fabricated in wafer form, along with a microbolometer focal plane array (FPA) and advanced thermal image processing. The driver parses SPI packets and assembles frames as they are received. ![]() It packs a resolution of 80 × 60 pixels into a camera body that is smaller than a dime. The STM32F4 communicates with the Lepton module using a driver that Andrew wrote over a 21MHz SPI bus. It is definitely an interesting project that will allow you to have a really portable battery-powered thermal imaging camera based on the FLIR Lepton thermal. The FLiR Dev Kit offered by SparkFun has the breakout board as well as a the Lepton longwave infrared (LWIR) imager and is available for $349.95 USD, making it easy to get everything you need to start developing your own thermal imaging projects with an Arduino, Raspberry Pi or an ARM based development tool. The FLIR Lepton is the most compact longwave infrared (LWIR) sensor available as an OEM product. The camera kit is available from GroupGet at a price of 150 USD and minimum order quantity is 25 units meaning that 25 people are needed to fulfill the group get too be successful. – For more information about the SparkFun FLiR Dev Kit with Lepton and Breakout board… Note that sourcing the sensor separately and the breakout board as well you could end up with a slightly lower cost, but it could take more time or efforts to get your hands on the hardware, so the SparkFun kit can be an interesting alternative if they have it in stock. The FLIR Lepton thermal imaging sensor is a smaller resolution (80×60 pixels) and affordable priced sensor designed for use in mobile devices providing an affordable thermal imaging capabilities. This is the thermal imaging sensor that is used by FLIR in their FLIR ONE thermal imaging accessory for the Apple iPhone 5 and 5S. ![]() The DIY and hardware hacking community has already worked up on a solution to use the FLIR Leptopn sensor along with a custom developed breakout board for various projects. But since FLIR does not sell single units separately, but takes only large orders for the sensors it is hard to get a Lepton sensor to experiment with. One way to do so is to buy a FLIR ONE disassemble the device and take out sensor, the alternative is to go for a group buy. In almost all cases, this technique results in a significantly reduced number of symbols to feed into our arithmetic coder.There is a GroupGet campaign for the FLIR Lepton Thermal Camera Core currently running that can help you get a single or a few units for $207.60 USD each and you can also get a breakout board for $45 USD each. Compatible with all production FLIR Leptons, including radiometric 2.5 and 3. Then in the future we can use the prediction along with the saved delta to get the original DC coefficient. By defining a good and reproducible prediction, we can subtract the actual DC coefficient from the predicted DC coefficient, and only encode the delta. Since the DCs are serialized last, there is a wealth of information from the AC coefficients available to predict the DC coefficient. ![]() Lepton gets a compression advantage by coding the DC as the last value in each block. Most image formats put the DC coefficients before any AC coefficients in the file format. The DC coefficient (brightness in each 8x8 block) takes up a lot of room (over 8%) in a typical iPhone photograph so it’s important to compress it well. For the coefficients we observed in JPEG files, the Lepton representation results in significantly fewer symbols than other encodings, such as pure unary, or fixed length two's complement.
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