[[uvscada:gxs700]]
 
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uvscada:gxs700 [2017/12/02 06:34] – mcmasteruvscada:gxs700 [2017/12/31 19:04] – mcmaster
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 ^ Image  ^ Vendor  ^ Product                ^ Works?    ^ Notes                                                    ^ ^ Image  ^ Vendor  ^ Product                ^ Works?    ^ Notes                                                    ^
-|        | Gendex  | GXS700 small (type 1)  | Yes*      | Linux VM problematic from Windows VMWare and VirtualBox  |+|        | Gendex  | GXS700 small (type 1)  | Yes       | Linux VM problematic from Windows VMWare and VirtualBox  |
 |        | Gendex  | GXS700 large (type 2)  | Yes       | Primary device I develop for                             | |        | Gendex  | GXS700 large (type 2)  | Yes       | Primary device I develop for                             |
 |        | Dexis   | Platinum               | Probably  | Test failed but DUT was likely broken                    | |        | Dexis   | Platinum               | Probably  | Test failed but DUT was likely broken                    |
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     * Linux     * Linux
       * Tested on Ubuntu 12.04 x64, Ubuntu 16.04 x64       * Tested on Ubuntu 12.04 x64, Ubuntu 16.04 x64
-      * WARNING for VM users: only size 2 works  
-        * You must use native linux for size 1, see below 
     * USB port (duh)     * USB port (duh)
     * A supported sensor     * A supported sensor
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       * Optional: test sensor by forcing a capture       * Optional: test sensor by forcing a capture
  
-===== VM ===== 
- 
-TLDR: 2017-10-10 size 1 test results: 
-  * VMWare: transfers very slowly, yielding a corrupt image 
-  * VirtualBox: freezes the *host* 
- 
-So if you have a size 1 sensor, unfortunately you may need to use native Linux. 
- 
-Details: Size 1 sensors use USB interrupt transfers while size 2 sensors use USB bulk transfers. Unfortunately, interrupt transfers seem to be relatively poorly supported aside from HID (keyboard/mice). This may be partially due to them doing large interrupt transfers while HID does very small transfers.  
- 
-Parallels has not been tested. Would be interested in feedback. 
- 
-^ Size ^ Hardware ^ OS ^ Result ^ By ^ Notes ^ 
-| 1 |  |  |  |  |  | 
-| 1 |  |  |  |  |  | 
-| 1 |  |  |  |  |  | 
-| 1 |  |  |  |  |  | 
  
 ====== Force capture ====== ====== Force capture ======
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 This step tests the sensor without actually firing x-rays at it.  This is also useful for calibrating sensor defects This step tests the sensor without actually firing x-rays at it.  This is also useful for calibrating sensor defects
  
-{{:uvscada:gxs700:force.jpg?300}}+{{:uvscada:gxs700:good.png?300}}
  
-    - $ python gxs700/capture.py -f+    - $ python gxs700/capture.py -f -e
     - Check which you got:     - Check which you got:
       * Waiting for image: expected response.  Continue below       * Waiting for image: expected response.  Continue below
       * "Exception: Failed to find a device": plugged in?  Did you run permission script?       * "Exception: Failed to find a device": plugged in?  Did you run permission script?
-    - It should have written capture_000.png and capture_000.bin to the current directory +    - It should have written capture_000_e.png to the current directory 
-    - Above will be very dark.  Enhance contrast by doing histogram equalization: python gxs700/decode.py -e capture_000.bin capture_000e.png +    - You should see an image roughly resembling the noise of the reference above.  If you do, your sensor probably works
-    - You should see an image roughly resembling the reference above.  If you do, your sensor probably works+
  
 ====== X-ray capture ====== ====== X-ray capture ======
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 See also: GXS700 general troubleshooting See also: GXS700 general troubleshooting
- 
  
 ====== Decoding ====== ====== Decoding ======
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 Takes raw, uncalibrated images.  I've been asked a few times if I could provide calibration files for the Windows driver or could even use their calibration files on my driver.  However, I'm not really interested in supporting their proprietary format. If someone submits a patch though I'll probably merge it in. Takes raw, uncalibrated images.  I've been asked a few times if I could provide calibration files for the Windows driver or could even use their calibration files on my driver.  However, I'm not really interested in supporting their proprietary format. If someone submits a patch though I'll probably merge it in.
  
-That said, I'm not against coming up with an independent calibration scheme.  I know how to take dark frames (see API) which is the key component.  Uncalibrated images have been generally good enough for me so I haven't put work into this.  If you are interested though shoot me a line.+There is a a quick and dirty scheme though. First, take a dark field capture, that is a capture with no x-rays. Use something like: 
 + 
 +  $ gxs700-capture -f -e 
 + 
 +This should yield a raw picture that looks something like this: 
 + 
 +{{:uvscada:gxs700:cal:df.jpg?200|}} 
 + 
 +And histogram equalized looks like this: 
 + 
 +{{:uvscada:gxs700:cal:dfe.jpg?200|}} 
 + 
 +Now make sure the sensor and the x-ray head have the exact same position and settings you will use to take your actual image capture. Make sure there is nothing in the beam and do a standard capture (and also firing the x-ray head): 
 + 
 +  $ gxs700-capture -e 
 + 
 +This produces a flat field image like this: 
 + 
 +{{:uvscada:gxs700:cal:ff.jpg?200|}} 
 + 
 +Which might look like this when histogram equalized: 
 + 
 +{{:uvscada:gxs700:cal:ffe.jpg?200|}} 
  
 ====== Quality ====== ====== Quality ======
 
 
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