AM62A7: AM62 platform DCC software LSC module validation error

enrui zhang
Part Number: AM62A7
Hello TI expert,
I used the LSC module in DCC software on the AM62 platform and found that the effect was not as expected. The first image shows the effect of closing the LSC module, and the second image shows the effect of the LSC strength parameter being 100. May I ask why this situation occurs?
over 1 year ago
0 Gang Hua over 1 year ago
TI__Guru 60400 points
Hi enrui,
I am not sure if I understand your question.
Do you mean there is no difference between LSC on and off?
Is this regarding live tuning in tuning tool?
0 enrui zhang over 1 year ago in reply to Gang Hua
Prodigy 170 points
What I mean is that the effect of the LSC module is abnormal. You can take a closer look at the second image and I will mark its effect for you
0 Gang Hua over 1 year ago in reply to enrui zhang
TI__Guru 60400 points
Hi enrui,
Could you please provide your LSC settings, raw, and yuv images?
I suppose this is for a linear sensor without tone mapping.
Also, which SDK version do you have?
0 enrui zhang over 1 year ago in reply to Gang Hua
Prodigy 170 points
Hi, Gang
The following are the provided lsc settings, raw, and yuv images, and the version is SDK8.6
zxy_2592x1944_Date_15-11-2023_Time_14-29-17 20231115 lsc origin.zip
0 Gang Hua over 1 year ago in reply to enrui zhang
TI__Guru 60400 points
Hi enrui,
Thanks for highlighting the issue!
It looks like an issue in the LSC driver.
Hi Chau Le,
Could you please test LSC on 9.0 or 9.1 to see if it works properly?
0 enrui zhang over 1 year ago in reply to Gang Hua
Prodigy 170 points
Hi，Gang
Have you tested the LSC module on SDK 9.0 or 9.1 yet?
0 Gang Hua over 1 year ago in reply to enrui zhang
TI__Guru 60400 points
Hi enrui,
It was holiday in the USA last week and Chau will get back to you on this soon.
0 enrui zhang over 1 year ago in reply to Gang Hua
Prodigy 170 points
Hello, Gang
I also want to ask a new question. Is the Lut table in the LSC XML of DCC software obtained through methods such as round (((gain 1) * 256/4), and is the gain value in the formula the ratio of the central block to different blocks? I feel that the value calculated through this formula is too small.
Fullscreen OVX8B-MAX9295_MARS_lsc_dcc_origin.xml Download
<?xml version="1.0" encoding="utf-8"?>
<RAWFE_cfg_lsc_xml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <!--this is a comment-->
    <dcc_name>rawfe_cfg_lsc</dcc_name>
    <dcc_header>
        <camera_module_id>     840 </camera_module_id>
        <dcc_descriptor_id>    7 </dcc_descriptor_id>
        <algorithm_vendor_id>  1 </algorithm_vendor_id>
        <tunning_tool_version> 0 </tunning_tool_version>
    </dcc_header>
    <!--=======================================================================-->
    <typedef>
        <cfg_rawfe_lsc type="struct">
            <!--==================cfg lsc=====================================================-->
            <lsc_cfg_enable type="uint32"> </lsc_cfg_enable>
            <lsc_cfg_gain_mode_m type="uint32"> </lsc_cfg_gain_mode_m>
            <lsc_cfg_gain_mode_n type="uint32"> </lsc_cfg_gain_mode_n>
            <lsc_cfg_gain_format type="uint32"> </lsc_cfg_gain_format>
            <lsc_cfg_lut_size    type="uint32"> </lsc_cfg_lut_size>
            <lsc_lut type="uint8*"> </lsc_lut>
        </cfg_rawfe_lsc>
    </typedef>
    <!--=======================================================================-->
    <use_case val="65535">
        <n-space>
            <region0 class="0">
				<gain             val="0" min="0" max="1000000">  </gain>
				<exposure         val="1" min="0" max="1000000">  </exposure>
				<colortemperature val="2" min="0" max="1000000">  </colortemperature>
            </region0>
        </n-space>

        <parameter_package>
            <rawfe_lsc_dcc type="cfg_rawfe_lsc">
            {
                <!--===============================cfg lsc dcc=======================================-->

                1           // lsc_cfg_enable         0:disable, 1: enable
                6           // lsc_cfg_gain_mode_m    3:8x, 4:16x, 5: 32x, 6: 64x, 7: 128x
                6           // lsc_cfg_gain_mode_n    3:8x, 4:16x, 5: 32x, 6: 64x, 7: 128x
                1           // lsc_cfg_gain_format    0:Q8, 1:Q8+1, 2:Q7, 3:Q7+1, 4:Q6, 5:Q6+1, 6:Q5, 7:Q5+1
                8540           // lsc_cfg_lut_size       in bytes
                {
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                }
            }
            </rawfe_lsc_dcc>
        </parameter_package>
    </use_case>
    <!--=====================================================================-->
</RAWFE_cfg_lsc_xml>
0 Gang Hua over 1 year ago in reply to enrui zhang
TI__Guru 60400 points
Hi enrui,
The gain value is encoded according the gian format.
As format "1" is for Q8+1, a gain value of 80 means 80/256 + 1 = 1.3.
0 Chau Le over 1 year ago in reply to enrui zhang
TI__Intellectual 1080 points
Hi Enrui,
I have tested the LSC module on SDK 9.0 and have confirmed the bug. We are working on a plan to resolve the issue, please allow a couple days for an update.
Best,
Chau
0 enrui zhang over 1 year ago in reply to Chau Le
Prodigy 170 points
Hi Chau,
Has the issue with the LSC module been resolved?
0 Chau Le over 1 year ago in reply to enrui zhang
TI__Intellectual 1080 points
Hi Enrui,
Our team is working to resolve this issue. Unfortunately, we do not have a specific timeline yet. We will keep you updated and thank you for understanding.
Best,
Chau
Processors

Processors forum

AM62A7: AM62 platform DCC software LSC module validation error
