1. Area Livestock Specialist Oklahoma Cooperative Extension Service
OK Steer Feedout Utilizing Vision Image Analysis and Warner-Bratzler Shear Force Data in Educational Programming
Greg Highfill
Area Livestock Specialist
Oklahoma Cooperative Extension Service

2. Grid Market – 3 of 5 est. Choice
Since 1984
Groups of 5 head
Fall Born Test – August – Feb.
Spring Born Test – Nov. - May
150 – 180 Days on Feed
Grid Market – 3 of 5 est. Choice

3. 4.10 554 1288 Choice ° Mt 60 R. C. Brinlee 132 DOF 179
DOF 179
Carcass Wt Fat REA YG Calc USDA YG 2
Choice °
CAB
Marbling
Mt 60

4. 2.86 650 1122 Select - Sl 50 Randall Newton 57 DOF 165
DOF 165
Carcass Wt Fat REA YG Calc USDA YG 2
Select -
Marbling
Sl 50

8. Warner-Bratzler Shear Force
Since 1999
25% of steers
593 steaks sampled
OSU FAPC

11. R = - 0.1974 12.5 & up Very Tough 10.1- 12.5 Tough 8.51- 10.0 Tender
< 8.5 lbs Very Tender
R =

12. Vision Image Analysis - VIA

15. Choice ° Mt 40 Walker Hall 26 Fat Th. .60 in. REA 11.9 sq. in.
Sterling Silver
Marbling
Mt 40

16. VIA

18. Vision Image Analysis Group 1 N=48 Group 2 N=21 12.26 12.55 .382 .441
Average Lean Area, sq in.
12.26
12.55
Average Fat Thickness
.382
.441
Average Adj. Marbling Score
1.9825
2.246
Average Lean Color Score
39.7
38.2
Average Red Meat Yield
72.65%
72.22%
Red Meat Yield Max/Min
75.3 / 70.0
74.5 / 71.4

19. Group 1 N=48 Group 2 N=21 14.6% 14.3% 58.3% 76.2% 27.1% 9.5%
Vision Image Analysis
Group 1
N=48
Group 2
N=21
Percent Light Muscled
14.6%
14.3%
Percent Average Muscled
58.3%
76.2%
Percent Heavy Muscled
27.1%
9.5%

20. r =

21. Vision Image Analysis
Developed to Enhance USDA Quality and Yield Grading
Approved October 2006
Still in Implementation Stage
RMS to E+V Camera – Cargill Meat Solutions
Increase Producer Feedback
Extension programming
Value Determination