Improving Line Follower Circuit for Reliable Robot Movement

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The discussion focuses on improving a line follower circuit for a robot tasked with navigating a grid with green and white backgrounds. The user is seeking a reliable white line detecting sensor, expressing dissatisfaction with the performance of IR sensors. Suggestions for alternative technologies or methods are welcomed, particularly in relation to the specific application of constructing a pyramid in the Khafraa region. The conversation includes references to previous threads for additional insights. A potential solution involving a red LED, LDR, and phototransistor is proposed as a possible alternative.
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Can anyone help in robotics?

i want a white line detecting sensor which gives reliable output for the movement of robot in the region as shown in the fig.
r888es.png


as we can see there are grids with green background and white color grids. I tried with IR sensors they getting quite unreliable. I just expect some suggestions.

Instead of line follower if you think something else will do more well then please suggest we will work on it. We have to actually make a pyramid on khafraa region we have decided the block placing mechanism just not able to trace the paths well and reliably.
 
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so, will a red LED and LDR with a phototransistor will do?
 
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