bpy.ops.paint.project_image(image=image_name) degrades high dynamic range to ~8bit #47168

New Issue

Dmitry Mozzherin · 2016-01-12T13:37:19+01:00

Dmitry Mozzherin commented

2016-01-12 13:37:19 +01:00

System Information
Ubuntu 14.04

System: Kernel: 3.19.0-43-generic x86_64 (64 bit, gcc: 4.8.2) Desktop: Gnome Distro: Ubuntu 14.04 trusty
Machine: Mobo: ASUSTeK model: SABERTOOTH X79 version: Rev 1.xx Bios: American Megatrends version: 4502 date: 10/15/2013
CPU: Hexa core Intel Core i7-4930K CPU (-HT-MCP-) cache: 12288 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 49503.9

         Clock Speeds: 1: 1316.132 MHz 2: 2101.558 MHz 3: 1300.535 MHz 4: 1294.734 MHz 5: 2049.222 MHz 6: 1799.144 MHz 7: 1805.074 MHz 8: 1717.031 MHz 9: 1672.429 MHz 10: 1703.882 MHz 11: 1668.046 MHz 12: 2000.625 MHz

Graphics: Card-1: NVIDIA GK110B [GeForce GTX 780 Ti] bus-ID: 01:00.0

         Card-2: NVIDIA GK110B [GeForce GTX 780 Ti] bus-ID: 02:00.0 
         X.Org: 1.17.1 drivers: nvidia,nouveau (unloaded: fbdev,vesa) Resolution: 1920x1200@59.9hz 
         GLX Renderer: GeForce GTX 780 Ti/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 352.63 Direct Rendering: Yes

Blender Version
Broken: 2.76.b f337fea

Short description of error

project_image function degrades high dynamic range to apparently 8bits, even when it saves into 32bit image.

Detailed description and examples are in Blender Exchange Questions --

http://blender.stackexchange.com/questions/44698/how-to-project-an-image-of-high-dynamic-range

http://blender.stackexchange.com/questions/44328/is-it-possible-to-increase-the-dynamic-range-of-external-quick-edit?lq=1

Example file:

https://github.com/dimus/project_image/raw/master/project_image.blend

Example Image

**System Information** Ubuntu 14.04 System: Kernel: 3.19.0-43-generic x86_64 (64 bit, gcc: 4.8.2) Desktop: Gnome Distro: Ubuntu 14.04 trusty Machine: Mobo: ASUSTeK model: SABERTOOTH X79 version: Rev 1.xx Bios: American Megatrends version: 4502 date: 10/15/2013 CPU: Hexa core Intel Core i7-4930K CPU (-HT-MCP-) cache: 12288 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 49503.9 ``` Clock Speeds: 1: 1316.132 MHz 2: 2101.558 MHz 3: 1300.535 MHz 4: 1294.734 MHz 5: 2049.222 MHz 6: 1799.144 MHz 7: 1805.074 MHz 8: 1717.031 MHz 9: 1672.429 MHz 10: 1703.882 MHz 11: 1668.046 MHz 12: 2000.625 MHz ``` Graphics: Card-1: NVIDIA GK110B [GeForce GTX 780 Ti] bus-ID: 01:00.0 ``` Card-2: NVIDIA GK110B [GeForce GTX 780 Ti] bus-ID: 02:00.0 X.Org: 1.17.1 drivers: nvidia,nouveau (unloaded: fbdev,vesa) Resolution: 1920x1200@59.9hz GLX Renderer: GeForce GTX 780 Ti/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 352.63 Direct Rendering: Yes ``` **Blender Version** Broken: 2.76.b f337fea **Short description of error** project_image function degrades high dynamic range to apparently 8bits, even when it saves into 32bit image. Detailed description and examples are in Blender Exchange Questions -- http://blender.stackexchange.com/questions/44698/how-to-project-an-image-of-high-dynamic-range http://blender.stackexchange.com/questions/44328/is-it-possible-to-increase-the-dynamic-range-of-external-quick-edit?lq=1 Example file: https://github.com/dimus/project_image/raw/master/project_image.blend [Example Image ](http://i.stack.imgur.com/QnePx.png)

Dmitry Mozzherin commented

2016-01-12 13:37:19 +01:00

Changed status to: 'Open'

Dmitry Mozzherin commented

2016-01-12 13:37:19 +01:00

Added subscriber: @DmitryMozzherin

Bastien Montagne commented

2016-01-12 15:40:35 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2016-01-12 15:40:35 +01:00

This is huge and complex file… Can you please make a simple, small .blend file, with clear steps to reproduce the issue, as requested by the submission template and guidelines? We need simple cases to understand and investigate issues easily.

Have had a quick look at project_paint code, there is a TODO in it related to reprojection, it only uses 8bit data currently. Should not be hard to add float support, but having a simple file making it easy to test would help a lot…

This is huge and complex file… Can you please make a simple, small .blend file, with clear steps to reproduce the issue, as requested by the submission template and guidelines? We need simple cases to understand and investigate issues easily. Have had a quick look at project_paint code, there is a TODO in it related to reprojection, it only uses 8bit data currently. Should not be hard to add float support, but having a simple file making it easy to test would help a lot…

Dmitry Mozzherin commented

2016-01-13 01:27:44 +01:00

I removed images from the blend file (https:*github.com/dimus/project_image/raw/master/project_image.blend) and added text with steps to reproduce the problem. Optionally with "git clone https:*github.com/dimus/project_image.git" you can get the blend file and an external render.exr file to use for projection.

More detailed steps are given in http://blender.stackexchange.com/a/44705/1311

I removed images from the blend file (https:*github.com/dimus/project_image/raw/master/project_image.blend) and added text with steps to reproduce the problem. Optionally with "git clone https:*github.com/dimus/project_image.git" you can get the blend file and an external render.exr file to use for projection. More detailed steps are given in http://blender.stackexchange.com/a/44705/1311

Campbell Barton self-assigned this 2016-01-14 08:29:04 +01:00

blender-admin commented

2016-01-14 21:32:30 +01:00

This issue was referenced by 5d45c2bf65

This issue was referenced by 5d45c2bf653c78928fb33548273219ef5caa5287

Campbell Barton commented

2016-01-14 22:11:57 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2016-01-14 22:11:57 +01:00

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bpy.ops.paint.project_image(image=image_name) degrades high dynamic range to ~8bit #47168